// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.configuration;

import java.net.URI;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;

import javax.ejb.Local;
import javax.naming.ConfigurationException;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;

import org.apache.cloudstack.api.command.admin.config.UpdateCfgCmd;
import org.apache.cloudstack.api.command.admin.ldap.LDAPConfigCmd;
import org.apache.cloudstack.api.command.admin.ldap.LDAPRemoveCmd;
import org.apache.cloudstack.api.command.admin.network.DeleteNetworkOfferingCmd;
import org.apache.cloudstack.api.command.admin.network.CreateNetworkOfferingCmd;
import org.apache.cloudstack.api.command.admin.network.UpdateNetworkOfferingCmd;
import org.apache.cloudstack.api.command.admin.offering.CreateDiskOfferingCmd;
import org.apache.cloudstack.api.command.admin.offering.*;
import org.apache.cloudstack.api.command.admin.pod.DeletePodCmd;
import org.apache.cloudstack.api.command.admin.pod.UpdatePodCmd;
import org.apache.cloudstack.api.command.admin.vlan.CreateVlanIpRangeCmd;
import org.apache.cloudstack.api.command.admin.zone.CreateZoneCmd;
import org.apache.cloudstack.api.command.admin.zone.DeleteZoneCmd;
import org.apache.cloudstack.api.command.admin.zone.UpdateZoneCmd;
import org.apache.cloudstack.api.command.admin.offering.CreateServiceOfferingCmd;
import org.apache.cloudstack.api.command.admin.offering.DeleteServiceOfferingCmd;
import org.apache.cloudstack.api.command.admin.vlan.DeleteVlanIpRangeCmd;
import org.apache.cloudstack.api.command.user.network.ListNetworkOfferingsCmd;
import org.apache.log4j.Logger;

import org.apache.cloudstack.acl.SecurityChecker;
import com.cloud.alert.AlertManager;
import org.apache.cloudstack.api.ApiConstants.LDAPParams;
import com.cloud.api.ApiDBUtils;
import com.cloud.capacity.dao.CapacityDao;
import com.cloud.configuration.Resource.ResourceType;
import com.cloud.configuration.dao.ConfigurationDao;
import com.cloud.dc.AccountVlanMapVO;
import com.cloud.dc.ClusterVO;
import com.cloud.dc.DataCenter;
import com.cloud.dc.DataCenter.NetworkType;
import com.cloud.dc.DataCenterIpAddressVO;
import com.cloud.dc.DataCenterLinkLocalIpAddressVO;
import com.cloud.dc.DataCenterVO;
import com.cloud.dc.HostPodVO;
import com.cloud.dc.Pod;
import com.cloud.dc.PodVlanMapVO;
import com.cloud.dc.Vlan;
import com.cloud.dc.Vlan.VlanType;
import com.cloud.dc.VlanVO;
import com.cloud.dc.dao.AccountVlanMapDao;
import com.cloud.dc.dao.ClusterDao;
import com.cloud.dc.dao.DataCenterDao;
import com.cloud.dc.dao.DataCenterIpAddressDao;
import com.cloud.dc.dao.DataCenterLinkLocalIpAddressDaoImpl;
import com.cloud.dc.dao.HostPodDao;
import com.cloud.dc.dao.PodVlanMapDao;
import com.cloud.dc.dao.VlanDao;
import com.cloud.deploy.DataCenterDeployment;
import com.cloud.domain.Domain;
import com.cloud.domain.DomainVO;
import com.cloud.domain.dao.DomainDao;
import com.cloud.event.ActionEvent;
import com.cloud.event.EventTypes;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.PermissionDeniedException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.host.HostVO;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.network.IPAddressVO;
import com.cloud.network.Network;
import com.cloud.network.Network.Capability;
import com.cloud.network.Network.GuestType;
import com.cloud.network.Network.Provider;
import com.cloud.network.Network.Service;
import com.cloud.network.NetworkManager;
import com.cloud.network.NetworkModel;
import com.cloud.network.NetworkService;
import com.cloud.network.NetworkVO;
import com.cloud.network.Networks.BroadcastDomainType;
import com.cloud.network.Networks.TrafficType;
import com.cloud.network.PhysicalNetwork;
import com.cloud.network.PhysicalNetworkVO;
import com.cloud.network.dao.FirewallRulesDao;
import com.cloud.network.dao.IPAddressDao;
import com.cloud.network.dao.NetworkDao;
import com.cloud.network.dao.PhysicalNetworkDao;
import com.cloud.network.dao.PhysicalNetworkTrafficTypeDao;
import com.cloud.network.dao.PhysicalNetworkTrafficTypeVO;
import com.cloud.network.vpc.VpcManager;
import com.cloud.offering.DiskOffering;
import com.cloud.offering.NetworkOffering;
import com.cloud.offering.NetworkOffering.Availability;
import com.cloud.offering.ServiceOffering;
import com.cloud.offerings.NetworkOfferingServiceMapVO;
import com.cloud.offerings.NetworkOfferingVO;
import com.cloud.offerings.dao.NetworkOfferingDao;
import com.cloud.offerings.dao.NetworkOfferingServiceMapDao;
import com.cloud.org.Grouping;
import com.cloud.org.Grouping.AllocationState;
import com.cloud.projects.Project;
import com.cloud.projects.ProjectManager;
import com.cloud.service.ServiceOfferingVO;
import com.cloud.service.dao.ServiceOfferingDao;
import com.cloud.storage.DiskOfferingVO;
import com.cloud.storage.SwiftVO;
import com.cloud.storage.dao.DiskOfferingDao;
import com.cloud.storage.dao.S3Dao;
import com.cloud.storage.dao.SwiftDao;
import com.cloud.storage.s3.S3Manager;
import com.cloud.storage.secondary.SecondaryStorageVmManager;
import com.cloud.storage.swift.SwiftManager;
import com.cloud.test.IPRangeConfig;
import com.cloud.user.Account;
import com.cloud.user.AccountManager;
import com.cloud.user.AccountVO;
import com.cloud.user.ResourceLimitService;
import com.cloud.user.User;
import com.cloud.user.UserContext;
import com.cloud.user.dao.AccountDao;
import com.cloud.utils.NumbersUtil;
import com.cloud.utils.StringUtils;
import com.cloud.utils.component.Adapters;
import com.cloud.utils.component.ComponentLocator;
import com.cloud.utils.component.Inject;
import com.cloud.utils.crypt.DBEncryptionUtil;
import com.cloud.utils.db.DB;
import com.cloud.utils.db.Filter;
import com.cloud.utils.db.SearchCriteria;
import com.cloud.utils.db.Transaction;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.utils.net.NetUtils;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.dao.NicDao;

import edu.emory.mathcs.backport.java.util.Arrays;

@Local(value = { ConfigurationManager.class, ConfigurationService.class })
public class ConfigurationManagerImpl implements ConfigurationManager, ConfigurationService {
    public static final Logger s_logger = Logger.getLogger(ConfigurationManagerImpl.class.getName());

    String _name;
    @Inject
    ConfigurationDao _configDao;
    @Inject
    HostPodDao _podDao;
    @Inject
    AccountVlanMapDao _accountVlanMapDao;
    @Inject
    PodVlanMapDao _podVlanMapDao;
    @Inject
    DataCenterDao _zoneDao;
    @Inject
    DomainDao _domainDao;
    @Inject
    SwiftDao _swiftDao;
    @Inject
    S3Dao _s3Dao;
    @Inject
    ServiceOfferingDao _serviceOfferingDao;
    @Inject
    DiskOfferingDao _diskOfferingDao;
    @Inject
    NetworkOfferingDao _networkOfferingDao;
    @Inject
    VlanDao _vlanDao;
    @Inject
    IPAddressDao _publicIpAddressDao;
    @Inject
    DataCenterIpAddressDao _privateIpAddressDao;
    @Inject
    AccountDao _accountDao;
    @Inject
    NetworkDao _networkDao;
    @Inject
    AccountManager _accountMgr;
    @Inject
    NetworkManager _networkMgr;
    @Inject
    NetworkService _networkSvc;
    @Inject
    NetworkModel _networkModel;
    @Inject
    ClusterDao _clusterDao;
    @Inject
    AlertManager _alertMgr;
    @Inject(adapter = SecurityChecker.class)
    Adapters<SecurityChecker> _secChecker;
    @Inject
    CapacityDao _capacityDao;
    @Inject
    ResourceLimitService _resourceLimitMgr;
    @Inject
    ProjectManager _projectMgr;
    @Inject
    SecondaryStorageVmManager _ssvmMgr;
    @Inject
    NetworkOfferingServiceMapDao _ntwkOffServiceMapDao;
    @Inject
    PhysicalNetworkDao _physicalNetworkDao;
    @Inject
    SwiftManager _swiftMgr;
    @Inject
    S3Manager _s3Mgr;
    @Inject
    PhysicalNetworkTrafficTypeDao _trafficTypeDao;
    @Inject
    NicDao _nicDao;
    @Inject
    FirewallRulesDao _firewallDao;
    @Inject
    VpcManager _vpcMgr;

    // FIXME - why don't we have interface for DataCenterLinkLocalIpAddressDao?
    protected static final DataCenterLinkLocalIpAddressDaoImpl _LinkLocalIpAllocDao = ComponentLocator.inject(DataCenterLinkLocalIpAddressDaoImpl.class);

    private int _maxVolumeSizeInGb;
    private long _defaultPageSize;
    protected Set<String> configValuesForValidation;

    @Override
    public boolean configure(final String name, final Map<String, Object> params) throws ConfigurationException {
        _name = name;

        String maxVolumeSizeInGbString = _configDao.getValue("storage.max.volume.size");
        _maxVolumeSizeInGb = NumbersUtil.parseInt(maxVolumeSizeInGbString, 2000);

        String defaultPageSizeString = _configDao.getValue("default.page.size");
        _defaultPageSize = NumbersUtil.parseLong(defaultPageSizeString, 500L);

        populateConfigValuesForValidationSet();
        return true;
    }

    private void populateConfigValuesForValidationSet() {
        configValuesForValidation = new HashSet<String>();
        configValuesForValidation.add("event.purge.interval");
        configValuesForValidation.add("account.cleanup.interval");
        configValuesForValidation.add("alert.wait");
        configValuesForValidation.add("consoleproxy.capacityscan.interval");
        configValuesForValidation.add("consoleproxy.loadscan.interval");
        configValuesForValidation.add("expunge.interval");
        configValuesForValidation.add("host.stats.interval");
        configValuesForValidation.add("investigate.retry.interval");
        configValuesForValidation.add("migrate.retry.interval");
        configValuesForValidation.add("network.gc.interval");
        configValuesForValidation.add("ping.interval");
        configValuesForValidation.add("snapshot.poll.interval");
        configValuesForValidation.add("stop.retry.interval");
        configValuesForValidation.add("storage.stats.interval");
        configValuesForValidation.add("storage.cleanup.interval");
        configValuesForValidation.add("wait");
        configValuesForValidation.add("xen.heartbeat.interval");
        configValuesForValidation.add("incorrect.login.attempts.allowed");
    }

    @Override
    public String getName() {
        return _name;
    }

    @Override
    public boolean start() {

        // TODO : this may not be a good place to do integrity check here, we
        // put it here as we need _alertMgr to be properly
        // configured
        // before we can use it

        // As it is so common for people to forget about configuring
        // management.network.cidr,
        String mgtCidr = _configDao.getValue(Config.ManagementNetwork.key());
        if (mgtCidr == null || mgtCidr.trim().isEmpty()) {
            String[] localCidrs = NetUtils.getLocalCidrs();
            if (localCidrs.length > 0) {
                s_logger.warn("Management network CIDR is not configured originally. Set it default to " + localCidrs[0]);

                _alertMgr.sendAlert(AlertManager.ALERT_TYPE_MANAGMENT_NODE, 0, new Long(0), "Management network CIDR is not configured originally. Set it default to " + localCidrs[0], "");
                _configDao.update(Config.ManagementNetwork.key(), Config.ManagementNetwork.getCategory(), localCidrs[0]);
            } else {
                s_logger.warn("Management network CIDR is not properly configured and we are not able to find a default setting");
                _alertMgr.sendAlert(AlertManager.ALERT_TYPE_MANAGMENT_NODE, 0, new Long(0), "Management network CIDR is not properly configured and we are not able to find a default setting", "");
            }
        }

        return true;
    }

    @Override
    public boolean stop() {
        return true;
    }

    @Override
    @DB
    public void updateConfiguration(long userId, String name, String category, String value) {

        String validationMsg = validateConfigurationValue(name, value);

        if (validationMsg != null) {
            s_logger.error("Invalid configuration option, name: " + name + ", value:" + value);
            throw new InvalidParameterValueException(validationMsg);
        }

        // Execute all updates in a single transaction
        Transaction txn = Transaction.currentTxn();
        txn.start();

        if (!_configDao.update(name, category, value)) {
            s_logger.error("Failed to update configuration option, name: " + name + ", value:" + value);
            throw new CloudRuntimeException("Failed to update configuration value. Please contact Cloud Support.");
        }

        PreparedStatement pstmt = null;
        if (Config.XenGuestNetwork.key().equalsIgnoreCase(name)) {
            String sql = "update host_details set value=? where name=?";
            try {
                pstmt = txn.prepareAutoCloseStatement(sql);
                pstmt.setString(1, value);
                pstmt.setString(2, "guest.network.device");

                pstmt.executeUpdate();
            } catch (Throwable e) {
                throw new CloudRuntimeException("Failed to update guest.network.device in host_details due to exception ", e);
            }
        } else if (Config.XenPrivateNetwork.key().equalsIgnoreCase(name)) {
            String sql = "update host_details set value=? where name=?";
            try {
                pstmt = txn.prepareAutoCloseStatement(sql);
                pstmt.setString(1, value);
                pstmt.setString(2, "private.network.device");

                pstmt.executeUpdate();
            } catch (Throwable e) {
                throw new CloudRuntimeException("Failed to update private.network.device in host_details due to exception ", e);
            }
        } else if (Config.XenPublicNetwork.key().equalsIgnoreCase(name)) {
            String sql = "update host_details set value=? where name=?";
            try {
                pstmt = txn.prepareAutoCloseStatement(sql);
                pstmt.setString(1, value);
                pstmt.setString(2, "public.network.device");

                pstmt.executeUpdate();
            } catch (Throwable e) {
                throw new CloudRuntimeException("Failed to update public.network.device in host_details due to exception ", e);
            }
        } else if (Config.XenStorageNetwork1.key().equalsIgnoreCase(name)) {
            String sql = "update host_details set value=? where name=?";
            try {
                pstmt = txn.prepareAutoCloseStatement(sql);
                pstmt.setString(1, value);
                pstmt.setString(2, "storage.network.device1");

                pstmt.executeUpdate();
            } catch (Throwable e) {
                throw new CloudRuntimeException("Failed to update storage.network.device1 in host_details due to exception ", e);
            }
        } else if (Config.XenStorageNetwork2.key().equals(name)) {
            String sql = "update host_details set value=? where name=?";
            try {
                pstmt = txn.prepareAutoCloseStatement(sql);
                pstmt.setString(1, value);
                pstmt.setString(2, "storage.network.device2");

                pstmt.executeUpdate();
            } catch (Throwable e) {
                throw new CloudRuntimeException("Failed to update storage.network.device2 in host_details due to exception ", e);
            }
        } else if (Config.SystemVMUseLocalStorage.key().equalsIgnoreCase(name)) {
            if (s_logger.isDebugEnabled()) {
                s_logger.debug("Config 'system.vm.use.local.storage' changed to value:" + value + ", need to update System VM offerings");
            }
            boolean useLocalStorage = Boolean.parseBoolean(_configDao.getValue(Config.SystemVMUseLocalStorage.key()));
            ServiceOfferingVO serviceOffering = _serviceOfferingDao.findByName(ServiceOffering.consoleProxyDefaultOffUniqueName);
            if (serviceOffering != null) {
                serviceOffering.setUseLocalStorage(useLocalStorage);
                if (!_serviceOfferingDao.update(serviceOffering.getId(), serviceOffering)) {
                    throw new CloudRuntimeException("Failed to update ConsoleProxy offering's use_local_storage option to value:" + useLocalStorage);
                }
            }

            serviceOffering = _serviceOfferingDao.findByName(ServiceOffering.routerDefaultOffUniqueName);
            if (serviceOffering != null) {
                serviceOffering.setUseLocalStorage(useLocalStorage);
                if (!_serviceOfferingDao.update(serviceOffering.getId(), serviceOffering)) {
                    throw new CloudRuntimeException("Failed to update SoftwareRouter offering's use_local_storage option to value:" + useLocalStorage);
                }
            }

            serviceOffering = _serviceOfferingDao.findByName(ServiceOffering.ssvmDefaultOffUniqueName);
            if (serviceOffering != null) {
                serviceOffering.setUseLocalStorage(useLocalStorage);
                if (!_serviceOfferingDao.update(serviceOffering.getId(), serviceOffering)) {
                    throw new CloudRuntimeException("Failed to update SecondaryStorage offering's use_local_storage option to value:" + useLocalStorage);
                }
            }
        }

        txn.commit();
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_CONFIGURATION_VALUE_EDIT, eventDescription = "updating configuration")
    public Configuration updateConfiguration(UpdateCfgCmd cmd) {
        Long userId = UserContext.current().getCallerUserId();
        String name = cmd.getCfgName();
        String value = cmd.getValue();
        UserContext.current().setEventDetails(" Name: " + name + " New Value: " + (((name.toLowerCase()).contains("password")) ? "*****" :
                (((value == null) ? "" : value))));
        // check if config value exists
        ConfigurationVO config = _configDao.findByName(name);
        if (config == null) {
            throw new InvalidParameterValueException("Config parameter with name " + name + " doesn't exist");
        }

        if (value == null) {
            return _configDao.findByName(name);
        }

        if (value.trim().isEmpty() || value.equals("null")) {
            value = null;
        }

        updateConfiguration(userId, name, config.getCategory(), value);
        String updatedValue = _configDao.getValue(name);
        if ((value == null && updatedValue == null) || updatedValue.equalsIgnoreCase(value)) {
            return _configDao.findByName(name);

        } else {
            throw new CloudRuntimeException("Unable to update configuration parameter " + name);
        }
    }

    private String validateConfigurationValue(String name, String value) {

        Config c = Config.getConfig(name);
        if (c == null) {
            s_logger.error("Missing configuration variable " + name + " in configuration table");
            return "Invalid configuration variable.";
        }

        Class<?> type = c.getType();

        if (value == null) {
            if (type.equals(Boolean.class)) {
                return "Please enter either 'true' or 'false'.";
            }
            return null;
        }
        value = value.trim();

        if (type.equals(Boolean.class)) {
            if (!(value.equals("true") || value.equals("false"))) {
                s_logger.error("Configuration variable " + name + " is expecting true or false in stead of " + value);
                return "Please enter either 'true' or 'false'.";
            }
            if (Config.SwiftEnable.key().equals(name)) {
                List<HostVO> hosts = _ssvmMgr.listSecondaryStorageHostsInAllZones();
                if (hosts != null && hosts.size() > 0) {
                    return " can not change " + Config.SwiftEnable.key() + " after you have added secondary storage";
                }
                SwiftVO swift = _swiftDao.findById(1L);
                if (swift != null) {
                    return " can not change " + Config.SwiftEnable.key() + " after you have added Swift";
                }
                if (this._s3Mgr.isS3Enabled()) {
                    return String.format("Swift is not supported when S3 is enabled.");
                }
            }
            if (Config.S3Enable.key().equals(name)) {
                if (this._swiftMgr.isSwiftEnabled()) {
                    return String.format("S3-backed Secondary Storage is not supported when Swift is enabled.");
                }
            }
            return null;
        }

        if (type.equals(Integer.class) && configValuesForValidation.contains(name)) {
            try {
                int val = Integer.parseInt(value);
                if (val <= 0) {
                    throw new InvalidParameterValueException("Please enter a positive value for the configuration parameter:" + name);
                }
            } catch (NumberFormatException e) {
                s_logger.error("There was an error trying to parse the integer value for:" + name);
                throw new InvalidParameterValueException("There was an error trying to parse the integer value for:" + name);
            }
        }

        String range = c.getRange();
        if (range == null) {
            return null;
        }

        if (type.equals(String.class)) {
            if (range.equals("privateip")) {
                try {
                    if (!NetUtils.isSiteLocalAddress(value)) {
                        s_logger.error("privateip range " + value + " is not a site local address for configuration variable " + name);
                        return "Please enter a site local IP address.";
                    }
                } catch (NullPointerException e) {
                    s_logger.error("Error parsing ip address for " + name);
                    throw new InvalidParameterValueException("Error parsing ip address");
                }
            } else if (range.equals("netmask")) {
                if (!NetUtils.isValidNetmask(value)) {
                    s_logger.error("netmask " + value + " is not a valid net mask for configuration variable " + name);
                    return "Please enter a valid netmask.";
                }
            } else if (range.equals("hypervisorList")) {
                String[] hypervisors = value.split(",");
                if (hypervisors == null) {
                    return "Please enter hypervisor list, seperated by comma";
                }
                for (String hypervisor : hypervisors) {
                    if (HypervisorType.getType(hypervisor) == HypervisorType.Any || HypervisorType.getType(hypervisor) == HypervisorType.None) {
                        return "Please enter valid hypervisor type";
                    }
                }
            } else if (range.equalsIgnoreCase("instanceName")) {
                if (!NetUtils.verifyInstanceName(value)) {
                    return "Instance name can not contain hyphen, spaces and plus sign";
                }
            } else {
                String[] options = range.split(",");
                for (String option : options) {
                    if (option.trim().equalsIgnoreCase(value)) {
                        return null;
                    }
                }
                s_logger.error("configuration value for " + name + " is invalid");
                return "Please enter : " + range;

            }
        } else if (type.equals(Integer.class)) {
            String[] options = range.split("-");
            if (options.length != 2) {
                String msg = "configuration range " + range + " for " + name + " is invalid";
                s_logger.error(msg);
                return msg;
            }
            int min = Integer.parseInt(options[0]);
            int max = Integer.parseInt(options[1]);
            int val = Integer.parseInt(value);
            if (val < min || val > max) {
                s_logger.error("configuration value for " + name + " is invalid");
                return "Please enter : " + range;
            }
        }
        return null;
    }

    private boolean podHasAllocatedPrivateIPs(long podId) {
        HostPodVO pod = _podDao.findById(podId);
        int count = _privateIpAddressDao.countIPs(podId, pod.getDataCenterId(), true);
        return (count > 0);
    }

    @DB
    protected void checkIfPodIsDeletable(long podId) {
        List<List<String>> tablesToCheck = new ArrayList<List<String>>();

        HostPodVO pod = _podDao.findById(podId);

        // Check if there are allocated private IP addresses in the pod
        if (_privateIpAddressDao.countIPs(podId, pod.getDataCenterId(), true) != 0) {
            throw new CloudRuntimeException("There are private IP addresses allocated for this pod");
        }

        List<String> volumes = new ArrayList<String>();
        volumes.add(0, "volumes");
        volumes.add(1, "pod_id");
        volumes.add(2, "there are storage volumes for this pod");
        tablesToCheck.add(volumes);

        List<String> host = new ArrayList<String>();
        host.add(0, "host");
        host.add(1, "pod_id");
        host.add(2, "there are servers running in this pod");
        tablesToCheck.add(host);

        List<String> vmInstance = new ArrayList<String>();
        vmInstance.add(0, "vm_instance");
        vmInstance.add(1, "pod_id");
        vmInstance.add(2, "there are virtual machines running in this pod");
        tablesToCheck.add(vmInstance);

        List<String> cluster = new ArrayList<String>();
        cluster.add(0, "cluster");
        cluster.add(1, "pod_id");
        cluster.add(2, "there are clusters in this pod");
        tablesToCheck.add(cluster);

        for (List<String> table : tablesToCheck) {
            String tableName = table.get(0);
            String column = table.get(1);
            String errorMsg = table.get(2);

            String dbName;
            if (tableName.equals("event") || tableName.equals("cloud_usage") || tableName.equals("usage_vm_instance") || tableName.equals("usage_ip_address") || tableName.equals("usage_network")
                    || tableName.equals("usage_job") || tableName.equals("account") || tableName.equals("user_statistics")) {
                dbName = "cloud_usage";
            } else {
                dbName = "cloud";
            }

            String selectSql = "SELECT * FROM `" + dbName + "`.`" + tableName + "` WHERE " + column + " = ?";

            if (tableName.equals("host") || tableName.equals("cluster") || tableName.equals("volumes") || tableName.equals("vm_instance")) {
                selectSql += " and removed IS NULL";
            }

            Transaction txn = Transaction.currentTxn();
            try {
                PreparedStatement stmt = txn.prepareAutoCloseStatement(selectSql);
                stmt.setLong(1, podId);
                ResultSet rs = stmt.executeQuery();
                if (rs != null && rs.next()) {
                    throw new CloudRuntimeException("The pod cannot be deleted because " + errorMsg);
                }
            } catch (SQLException ex) {
                throw new CloudRuntimeException("The Management Server failed to detect if pod is deletable. Please contact Cloud Support.");
            }
        }
    }

    private void checkPodAttributes(long podId, String podName, long zoneId, String gateway, String cidr, String startIp, String endIp, String allocationStateStr, boolean checkForDuplicates,
            boolean skipGatewayOverlapCheck) {
        if (checkForDuplicates) {
            // Check if the pod already exists
            if (validPod(podName, zoneId)) {
                throw new InvalidParameterValueException("A pod with name: " + podName + " already exists in zone " + zoneId + ". Please specify a different pod name. ");
            }
        }

        String cidrAddress;
        long cidrSize;
        // Get the individual cidrAddress and cidrSize values, if the CIDR is
        // valid. If it's not valid, return an error.
        if (NetUtils.isValidCIDR(cidr)) {
            cidrAddress = getCidrAddress(cidr);
            cidrSize = getCidrSize(cidr);
        } else {
            throw new InvalidParameterValueException("Please enter a valid CIDR for pod: " + podName);
        }

        // Check if the IP range is valid
        if (startIp != null || endIp != null) {
            checkIpRange(startIp, endIp, cidrAddress, cidrSize);
        }

        // Check if the IP range overlaps with the public ip
        checkOverlapPublicIpRange(zoneId, startIp, endIp);

        // Check if the gateway is a valid IP address
        if (!NetUtils.isValidIp(gateway)) {
            throw new InvalidParameterValueException("The gateway is not a valid IP address.");
        }

        // Check if the gateway is in the CIDR subnet
        if (!NetUtils.getCidrSubNet(gateway, cidrSize).equalsIgnoreCase(NetUtils.getCidrSubNet(cidrAddress, cidrSize))) {
            throw new InvalidParameterValueException("The gateway is not in the CIDR subnet.");
        }

        // Don't allow gateway to overlap with start/endIp
        if (!skipGatewayOverlapCheck) {
            if (NetUtils.ipRangesOverlap(startIp, endIp, gateway, gateway)) {
                throw new InvalidParameterValueException("The gateway shouldn't overlap start/end ip addresses");
            }
        }

        String checkPodCIDRs = _configDao.getValue("check.pod.cidrs");
        if (checkPodCIDRs == null || checkPodCIDRs.trim().isEmpty() || Boolean.parseBoolean(checkPodCIDRs)) {
            checkPodCidrSubnets(zoneId, podId, cidr);
            /*
             * Commenting out due to Bug 11593 - CIDR conflicts with zone when extending pod but not when creating it
             * 
             * checkCidrVlanOverlap(zoneId, cidr);
             */
        }

        Grouping.AllocationState allocationState = null;
        if (allocationStateStr != null && !allocationStateStr.isEmpty()) {
            try {
                allocationState = Grouping.AllocationState.valueOf(allocationStateStr);
            } catch (IllegalArgumentException ex) {
                throw new InvalidParameterValueException("Unable to resolve Allocation State '" + allocationStateStr + "' to a supported state");
            }
        }
    }

    @Override
    @DB
    public boolean deletePod(DeletePodCmd cmd) {
        Long podId = cmd.getId();

        Transaction txn = Transaction.currentTxn();

        // Make sure the pod exists
        if (!validPod(podId)) {
            throw new InvalidParameterValueException("A pod with ID: " + podId + " does not exist.");
        }

        checkIfPodIsDeletable(podId);

        HostPodVO pod = _podDao.findById(podId);

        txn.start();

        // Delete private ip addresses for the pod if there are any
        List<DataCenterIpAddressVO> privateIps = _privateIpAddressDao.listByPodIdDcId(Long.valueOf(podId), pod.getDataCenterId());
        if (!privateIps.isEmpty()) {
            if (!(_privateIpAddressDao.deleteIpAddressByPod(podId))) {
                throw new CloudRuntimeException("Failed to cleanup private ip addresses for pod " + podId);
            }
        }

        // Delete link local ip addresses for the pod
        List<DataCenterLinkLocalIpAddressVO> localIps = _LinkLocalIpAllocDao.listByPodIdDcId(podId, pod.getDataCenterId());
        if (!localIps.isEmpty()) {
            if (!(_LinkLocalIpAllocDao.deleteIpAddressByPod(podId))) {
                throw new CloudRuntimeException("Failed to cleanup private ip addresses for pod " + podId);
            }
        }

        // Delete vlans associated with the pod
        List<? extends Vlan> vlans = _networkModel.listPodVlans(podId);
        if (vlans != null && !vlans.isEmpty()) {
            for (Vlan vlan : vlans) {
                _vlanDao.remove(vlan.getId());
            }
        }

        // Delete corresponding capacity records
        _capacityDao.removeBy(null, null, podId, null, null);

        // Delete the pod
        if (!(_podDao.remove(podId))) {
            throw new CloudRuntimeException("Failed to delete pod " + podId);
        }

        txn.commit();

        return true;
    }

    @Override
    public Pod editPod(UpdatePodCmd cmd) {
        return editPod(cmd.getId(), cmd.getPodName(), cmd.getStartIp(), cmd.getEndIp(), cmd.getGateway(), cmd.getNetmask(), cmd.getAllocationState());
    }

    @Override
    @DB
    public Pod editPod(long id, String name, String startIp, String endIp, String gateway, String netmask, String allocationStateStr) {

        // verify parameters
        HostPodVO pod = _podDao.findById(id);
        ;
        if (pod == null) {
            throw new InvalidParameterValueException("Unable to find pod by id " + id);
        }

        String[] existingPodIpRange = pod.getDescription().split("-");
        String[] leftRangeToAdd = null;
        String[] rightRangeToAdd = null;
        boolean allowToDownsize = false;

        // If the gateway, CIDR, private IP range is being changed, check if the
        // pod has allocated private IP addresses
        if (podHasAllocatedPrivateIPs(id)) {

            if (netmask != null) {
                long newCidr = NetUtils.getCidrSize(netmask);
                long oldCidr = pod.getCidrSize();

                if (newCidr > oldCidr) {
                    throw new CloudRuntimeException("The specified pod has allocated private IP addresses, so its IP address range can be extended only");
                }
            }

            if (startIp != null && !startIp.equals(existingPodIpRange[0])) {
                if (NetUtils.ipRangesOverlap(startIp, null, existingPodIpRange[0], existingPodIpRange[1])) {
                    throw new CloudRuntimeException("The specified pod has allocated private IP addresses, so its IP address range can be extended only");
                } else {
                    leftRangeToAdd = new String[2];
                    long endIpForUpdate = NetUtils.ip2Long(existingPodIpRange[0]) - 1;
                    leftRangeToAdd[0] = startIp;
                    leftRangeToAdd[1] = NetUtils.long2Ip(endIpForUpdate);
                }
            }

            if (endIp != null && !endIp.equals(existingPodIpRange[1])) {
                if (NetUtils.ipRangesOverlap(endIp, endIp, existingPodIpRange[0], existingPodIpRange[1])) {
                    throw new CloudRuntimeException("The specified pod has allocated private IP addresses, so its IP address range can be extended only");
                } else {
                    rightRangeToAdd = new String[2];
                    long startIpForUpdate = NetUtils.ip2Long(existingPodIpRange[1]) + 1;
                    rightRangeToAdd[0] = NetUtils.long2Ip(startIpForUpdate);
                    rightRangeToAdd[1] = endIp;
                }
            }

        } else {
            allowToDownsize = true;
        }

        if (gateway == null) {
            gateway = pod.getGateway();
        }

        if (netmask == null) {
            netmask = NetUtils.getCidrNetmask(pod.getCidrSize());
        }

        String oldPodName = pod.getName();
        if (name == null) {
            name = oldPodName;
        }

        if (gateway == null) {
            gateway = pod.getGateway();
        }

        if (startIp == null) {
            startIp = existingPodIpRange[0];
        }

        if (endIp == null) {
            endIp = existingPodIpRange[1];
        }

        if (allocationStateStr == null) {
            allocationStateStr = pod.getAllocationState().toString();
        }

        // Verify pod's attributes
        String cidr = NetUtils.ipAndNetMaskToCidr(gateway, netmask);
        boolean checkForDuplicates = !oldPodName.equals(name);
        checkPodAttributes(id, name, pod.getDataCenterId(), gateway, cidr, startIp, endIp, allocationStateStr, checkForDuplicates, false);

        Transaction txn = Transaction.currentTxn();
        try {
            txn.start();
            long zoneId = pod.getDataCenterId();

            if (!allowToDownsize) {
                if (leftRangeToAdd != null) {
                    _zoneDao.addPrivateIpAddress(zoneId, pod.getId(), leftRangeToAdd[0], leftRangeToAdd[1]);
                }

                if (rightRangeToAdd != null) {
                    _zoneDao.addPrivateIpAddress(zoneId, pod.getId(), rightRangeToAdd[0], rightRangeToAdd[1]);
                }

            } else {
                // delete the old range
                _zoneDao.deletePrivateIpAddressByPod(pod.getId());

                // add the new one
                if (startIp == null) {
                    startIp = existingPodIpRange[0];
                }

                if (endIp == null) {
                    endIp = existingPodIpRange[1];
                }

                _zoneDao.addPrivateIpAddress(zoneId, pod.getId(), startIp, endIp);
            }

            pod.setName(name);
            pod.setDataCenterId(zoneId);
            pod.setGateway(gateway);
            pod.setCidrAddress(getCidrAddress(cidr));
            pod.setCidrSize(getCidrSize(cidr));

            String ipRange = startIp + "-" + endIp;
            pod.setDescription(ipRange);
            Grouping.AllocationState allocationState = null;
            if (allocationStateStr != null && !allocationStateStr.isEmpty()) {
                allocationState = Grouping.AllocationState.valueOf(allocationStateStr);
                _capacityDao.updateCapacityState(null, pod.getId(), null, null, allocationStateStr);
                pod.setAllocationState(allocationState);
            }

            _podDao.update(id, pod);

            txn.commit();
        } catch (Exception e) {
            s_logger.error("Unable to edit pod due to " + e.getMessage(), e);
            throw new CloudRuntimeException("Failed to edit pod. Please contact Cloud Support.");
        }

        return pod;
    }

    @Override
    public Pod createPod(long zoneId, String name, String startIp, String endIp, String gateway, String netmask, String allocationState) {
        String cidr = NetUtils.ipAndNetMaskToCidr(gateway, netmask);
        Long userId = UserContext.current().getCallerUserId();

        if (allocationState == null) {
            allocationState = Grouping.AllocationState.Enabled.toString();
        }
        return createPod(userId.longValue(), name, zoneId, gateway, cidr, startIp, endIp, allocationState, false);
    }

    @Override
    @DB
    public HostPodVO createPod(long userId, String podName, long zoneId, String gateway, String cidr, String startIp, String endIp, String allocationStateStr, boolean skipGatewayOverlapCheck) {

        // Check if the zone is valid
        if (!validZone(zoneId)) {
            throw new InvalidParameterValueException("Please specify a valid zone.");
        }

        // Check if zone is disabled
        DataCenterVO zone = _zoneDao.findById(zoneId);
        Account account = UserContext.current().getCaller();
        if (Grouping.AllocationState.Disabled == zone.getAllocationState() && !_accountMgr.isRootAdmin(account.getType())) {
            throw new PermissionDeniedException("Cannot perform this operation, Zone is currently disabled: " + zoneId);
        }

        String cidrAddress = getCidrAddress(cidr);
        int cidrSize = getCidrSize(cidr);

        // endIp is an optional parameter; if not specified - default it to the
        // end ip of the pod's cidr
        if (startIp != null) {
            if (endIp == null) {
                endIp = NetUtils.getIpRangeEndIpFromCidr(cidrAddress, cidrSize);
            }
        }

        // Validate new pod settings
        checkPodAttributes(-1, podName, zoneId, gateway, cidr, startIp, endIp, allocationStateStr, true, skipGatewayOverlapCheck);

        // Create the new pod in the database
        String ipRange;
        if (startIp != null) {
            ipRange = startIp + "-" + endIp;
        } else {
            throw new InvalidParameterValueException("Start ip is required parameter");
        }

        HostPodVO pod = new HostPodVO(podName, zoneId, gateway, cidrAddress, cidrSize, ipRange);

        Grouping.AllocationState allocationState = null;
        if (allocationStateStr != null && !allocationStateStr.isEmpty()) {
            allocationState = Grouping.AllocationState.valueOf(allocationStateStr);
            pod.setAllocationState(allocationState);
        }

        Transaction txn = Transaction.currentTxn();
        txn.start();

        pod = _podDao.persist(pod);

        if (startIp != null) {
            _zoneDao.addPrivateIpAddress(zoneId, pod.getId(), startIp, endIp);
        }

        String[] linkLocalIpRanges = getLinkLocalIPRange();
        if (linkLocalIpRanges != null) {
            _zoneDao.addLinkLocalIpAddress(zoneId, pod.getId(), linkLocalIpRanges[0], linkLocalIpRanges[1]);
        }

        txn.commit();

        return pod;
    }

    @DB
    protected void checkIfZoneIsDeletable(long zoneId) {
        List<List<String>> tablesToCheck = new ArrayList<List<String>>();

        List<String> host = new ArrayList<String>();
        host.add(0, "host");
        host.add(1, "data_center_id");
        host.add(2, "there are servers running in this zone");
        tablesToCheck.add(host);

        List<String> hostPodRef = new ArrayList<String>();
        hostPodRef.add(0, "host_pod_ref");
        hostPodRef.add(1, "data_center_id");
        hostPodRef.add(2, "there are pods in this zone");
        tablesToCheck.add(hostPodRef);

        List<String> privateIP = new ArrayList<String>();
        privateIP.add(0, "op_dc_ip_address_alloc");
        privateIP.add(1, "data_center_id");
        privateIP.add(2, "there are private IP addresses allocated for this zone");
        tablesToCheck.add(privateIP);

        List<String> publicIP = new ArrayList<String>();
        publicIP.add(0, "user_ip_address");
        publicIP.add(1, "data_center_id");
        publicIP.add(2, "there are public IP addresses allocated for this zone");
        tablesToCheck.add(publicIP);

        List<String> vmInstance = new ArrayList<String>();
        vmInstance.add(0, "vm_instance");
        vmInstance.add(1, "data_center_id");
        vmInstance.add(2, "there are virtual machines running in this zone");
        tablesToCheck.add(vmInstance);

        List<String> volumes = new ArrayList<String>();
        volumes.add(0, "volumes");
        volumes.add(1, "data_center_id");
        volumes.add(2, "there are storage volumes for this zone");
        tablesToCheck.add(volumes);

        List<String> physicalNetworks = new ArrayList<String>();
        physicalNetworks.add(0, "physical_network");
        physicalNetworks.add(1, "data_center_id");
        physicalNetworks.add(2, "there are physical networks in this zone");
        tablesToCheck.add(physicalNetworks);

        for (List<String> table : tablesToCheck) {
            String tableName = table.get(0);
            String column = table.get(1);
            String errorMsg = table.get(2);

            String dbName = "cloud";

            String selectSql = "SELECT * FROM `" + dbName + "`.`" + tableName + "` WHERE " + column + " = ?";

            if (tableName.equals("op_dc_vnet_alloc")) {
                selectSql += " AND taken IS NOT NULL";
            }

            if (tableName.equals("user_ip_address")) {
                selectSql += " AND state!='Free'";
            }

            if (tableName.equals("op_dc_ip_address_alloc")) {
                selectSql += " AND taken IS NOT NULL";
            }

            if (tableName.equals("host_pod_ref") || tableName.equals("host") || tableName.equals("volumes") || tableName.equals("physical_network")) {
                selectSql += " AND removed is NULL";
            }

            if (tableName.equals("vm_instance")) {
                selectSql += " AND state != '" + VirtualMachine.State.Expunging.toString() + "'";
            }

            Transaction txn = Transaction.currentTxn();
            try {
                PreparedStatement stmt = txn.prepareAutoCloseStatement(selectSql);
                stmt.setLong(1, zoneId);
                ResultSet rs = stmt.executeQuery();
                if (rs != null && rs.next()) {
                    throw new CloudRuntimeException("The zone is not deletable because " + errorMsg);
                }
            } catch (SQLException ex) {
                throw new CloudRuntimeException("The Management Server failed to detect if zone is deletable. Please contact Cloud Support.");
            }
        }

    }

    private void checkZoneParameters(String zoneName, String dns1, String dns2, String internalDns1, String internalDns2, boolean checkForDuplicates, Long domainId, String allocationStateStr) {
        if (checkForDuplicates) {
            // Check if a zone with the specified name already exists
            if (validZone(zoneName)) {
                throw new InvalidParameterValueException("A zone with that name already exists. Please specify a unique zone name.");
            }
        }

        // check if valid domain
        if (domainId != null) {
            DomainVO domain = _domainDao.findById(domainId);

            if (domain == null) {
                throw new InvalidParameterValueException("Please specify a valid domain id");
            }
        }

        // Check IP validity for DNS addresses
        // Empty strings is a valid input -- hence the length check
        if (dns1 != null && dns1.length() > 0 && !NetUtils.isValidIp(dns1)) {
            throw new InvalidParameterValueException("Please enter a valid IP address for DNS1");
        }

        if (dns2 != null && dns2.length() > 0 && !NetUtils.isValidIp(dns2)) {
            throw new InvalidParameterValueException("Please enter a valid IP address for DNS2");
        }

        if ((internalDns1 != null && internalDns1.length() > 0 && !NetUtils.isValidIp(internalDns1))) {
            throw new InvalidParameterValueException("Please enter a valid IP address for internal DNS1");
        }

        if (internalDns2 != null && internalDns2.length() > 0 && !NetUtils.isValidIp(internalDns2)) {
            throw new InvalidParameterValueException("Please enter a valid IP address for internal DNS2");
        }

        Grouping.AllocationState allocationState = null;
        if (allocationStateStr != null && !allocationStateStr.isEmpty()) {
            try {
                allocationState = Grouping.AllocationState.valueOf(allocationStateStr);
            } catch (IllegalArgumentException ex) {
                throw new InvalidParameterValueException("Unable to resolve Allocation State '" + allocationStateStr + "' to a supported state");
            }
        }
    }

    private void checkIpRange(String startIp, String endIp, String cidrAddress, long cidrSize) {
        if (!NetUtils.isValidIp(startIp)) {
            throw new InvalidParameterValueException("The start address of the IP range is not a valid IP address.");
        }

        if (endIp != null && !NetUtils.isValidIp(endIp)) {
            throw new InvalidParameterValueException("The end address of the IP range is not a valid IP address.");
        }

        if (!NetUtils.getCidrSubNet(startIp, cidrSize).equalsIgnoreCase(NetUtils.getCidrSubNet(cidrAddress, cidrSize))) {
            throw new InvalidParameterValueException("The start address of the IP range is not in the CIDR subnet.");
        }

        if (endIp != null && !NetUtils.getCidrSubNet(endIp, cidrSize).equalsIgnoreCase(NetUtils.getCidrSubNet(cidrAddress, cidrSize))) {
            throw new InvalidParameterValueException("The end address of the IP range is not in the CIDR subnet.");
        }

        if (endIp != null && NetUtils.ip2Long(startIp) > NetUtils.ip2Long(endIp)) {
            throw new InvalidParameterValueException("The start IP address must have a lower value than the end IP address.");
        }

    }

    private void checkOverlapPublicIpRange(Long zoneId, String startIp, String endIp) {
        long privateStartIp = NetUtils.ip2Long(startIp);
        long privateEndIp = NetUtils.ip2Long(endIp);

        List<IPAddressVO> existingPublicIPs = _publicIpAddressDao.listByDcId(zoneId);
        for (IPAddressVO publicIPVO : existingPublicIPs) {
            long publicIP = NetUtils.ip2Long(publicIPVO.getAddress().addr());
            if ((publicIP >= privateStartIp) && (publicIP <= privateEndIp)) {
                throw new InvalidParameterValueException("The Start IP and endIP address range overlap with Public IP :" + publicIPVO.getAddress().addr());
            }
        }
    }

    private void checkOverlapPrivateIpRange(Long zoneId, String startIp, String endIp) {

        List<HostPodVO> podsInZone = _podDao.listByDataCenterId(zoneId);
        for (HostPodVO hostPod : podsInZone) {
            String[] IpRange = hostPod.getDescription().split("-");
            if (IpRange[0] == null || IpRange[1] == null)
                continue;
            if (!NetUtils.isValidIp(IpRange[0]) || !NetUtils.isValidIp(IpRange[1]))
                continue;
            if (NetUtils.ipRangesOverlap(startIp, endIp, IpRange[0], IpRange[1])) {
                throw new InvalidParameterValueException("The Start IP and endIP address range overlap with private IP :" + IpRange[0] + ":" + IpRange[1]);
            }
        }
    }

    @Override
    @DB
    @ActionEvent(eventType = EventTypes.EVENT_ZONE_DELETE, eventDescription = "deleting zone", async = false)
    public boolean deleteZone(DeleteZoneCmd cmd) {

        Transaction txn = Transaction.currentTxn();
        boolean success = false;

        Long userId = UserContext.current().getCallerUserId();
        Long zoneId = cmd.getId();

        if (userId == null) {
            userId = Long.valueOf(User.UID_SYSTEM);
        }

        // Make sure the zone exists
        if (!validZone(zoneId)) {
            throw new InvalidParameterValueException("A zone with ID: " + zoneId + " does not exist.");
        }

        checkIfZoneIsDeletable(zoneId);

        txn.start();

        // delete vlans for this zone
        List<VlanVO> vlans = _vlanDao.listByZone(zoneId);
        for (VlanVO vlan : vlans) {
            _vlanDao.remove(vlan.getId());
        }

        success = _zoneDao.remove(zoneId);

        if (success) {
            // delete all capacity records for the zone
            _capacityDao.removeBy(null, zoneId, null, null, null);
        }

        txn.commit();

        return success;

    }

    @Override
    @DB
    public boolean removeLDAP(LDAPRemoveCmd cmd) {
        _configDao.expunge(LDAPParams.hostname.toString());
        _configDao.expunge(LDAPParams.port.toString());
        _configDao.expunge(LDAPParams.queryfilter.toString());
        _configDao.expunge(LDAPParams.searchbase.toString());
        _configDao.expunge(LDAPParams.usessl.toString());
        _configDao.expunge(LDAPParams.dn.toString());
        _configDao.expunge(LDAPParams.passwd.toString());
        _configDao.expunge(LDAPParams.truststore.toString());
        _configDao.expunge(LDAPParams.truststorepass.toString());
        return true;
    }

    @Override
    @DB
    public boolean updateLDAP(LDAPConfigCmd cmd) {
        try {
            // set the ldap details in the zone details table with a zone id of -12
            String hostname = cmd.getHostname();
            Integer port = cmd.getPort();
            String queryFilter = cmd.getQueryFilter();
            String searchBase = cmd.getSearchBase();
            Boolean useSSL = cmd.getUseSSL();
            String bindDN = cmd.getBindDN();
            String bindPasswd = cmd.getBindPassword();
            String trustStore = cmd.getTrustStore();
            String trustStorePassword = cmd.getTrustStorePassword();

            if (bindDN != null && bindPasswd == null) {
                throw new InvalidParameterValueException("If you specify a bind name then you need to provide bind password too.");
            }

            // check if the info is correct
            Hashtable<String, String> env = new Hashtable<String, String>(11);
            env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
            String protocol = "ldap://";
            if (new Boolean(useSSL)) {
                env.put(Context.SECURITY_PROTOCOL, "ssl");
                protocol = "ldaps://";
                if (trustStore == null || trustStorePassword == null) {
                    throw new InvalidParameterValueException("If you plan to use SSL then you need to configure the trust store.");
                }
                System.setProperty("javax.net.ssl.trustStore", trustStore);
                System.setProperty("javax.net.ssl.trustStorePassword", trustStorePassword);
            }
            env.put(Context.PROVIDER_URL, protocol + hostname + ":" + port);
            if (bindDN != null && bindPasswd != null) {
                env.put(Context.SECURITY_AUTHENTICATION, "simple");
                env.put(Context.SECURITY_PRINCIPAL, bindDN);
                env.put(Context.SECURITY_CREDENTIALS, bindPasswd);
            }
            // Create the initial context
            DirContext ctx = new InitialDirContext(env);
            ctx.close();

            // store the result in DB COnfiguration
            ConfigurationVO cvo = _configDao.findByName(LDAPParams.hostname.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.hostname.toString(), null, "Hostname or ip address of the ldap server eg: my.ldap.com");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(hostname));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.port.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.port.toString(), null, "Specify the LDAP port if required, default is 389");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(port.toString()));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.queryfilter.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.queryfilter.toString(), null,
                        "You specify a query filter here, which narrows down the users, who can be part of this domain");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(queryFilter));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.searchbase.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.searchbase.toString(), null,
                        "The search base defines the starting point for the search in the directory tree Example:  dc=cloud,dc=com.");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(searchBase));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.usessl.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.usessl.toString(), null, "Check Use SSL if the external LDAP server is configured for LDAP over SSL.");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(useSSL.toString()));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.dn.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.dn.toString(), null, "Specify the distinguished name of a user with the search permission on the directory");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(bindDN));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.passwd.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.passwd.toString(), null, "Enter the password");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(bindPasswd));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.truststore.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.truststore.toString(), null, "Enter the path to trusted keystore");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(trustStore));
            _configDao.persist(cvo);

            cvo = _configDao.findByName(LDAPParams.truststorepass.toString());
            if (cvo == null) {
                cvo = new ConfigurationVO("Hidden", "DEFAULT", "management-server", LDAPParams.truststorepass.toString(), null, "Enter the password for trusted keystore");
            }
            cvo.setValue(DBEncryptionUtil.encrypt(trustStorePassword));
            _configDao.persist(cvo);

            s_logger.debug("The ldap server is configured: " + hostname);
        } catch (NamingException ne) {
            ne.printStackTrace();
            throw new InvalidParameterValueException("Naming Exception, check you ldap data ! " + ne.getMessage() + (ne.getCause() != null ? ("Caused by:" + ne.getCause().getMessage()) : ""));
        }
        return true;
    }

    @Override
    @DB
    @ActionEvent(eventType = EventTypes.EVENT_ZONE_EDIT, eventDescription = "editing zone", async = false)
    public DataCenter editZone(UpdateZoneCmd cmd) {
        // Parameter validation as from execute() method in V1
        Long zoneId = cmd.getId();
        String zoneName = cmd.getZoneName();
        String dns1 = cmd.getDns1();
        String dns2 = cmd.getDns2();
        String internalDns1 = cmd.getInternalDns1();
        String internalDns2 = cmd.getInternalDns2();
        String guestCidr = cmd.getGuestCidrAddress();
        List<String> dnsSearchOrder = cmd.getDnsSearchOrder();
        Boolean isPublic = cmd.isPublic();
        String allocationStateStr = cmd.getAllocationState();
        String dhcpProvider = cmd.getDhcpProvider();
        Map<?, ?> detailsMap = cmd.getDetails();
        String networkDomain = cmd.getDomain();
        Boolean localStorageEnabled = cmd.getLocalStorageEnabled();

        Map<String, String> newDetails = new HashMap<String, String>();
        if (detailsMap != null) {
            Collection<?> zoneDetailsCollection = detailsMap.values();
            Iterator<?> iter = zoneDetailsCollection.iterator();
            while (iter.hasNext()) {
                HashMap<?, ?> detail = (HashMap<?, ?>) iter.next();
                String key = (String) detail.get("key");
                String value = (String) detail.get("value");
                if ((key == null) || (value == null)) {
                    throw new InvalidParameterValueException(
                            "Invalid Zone Detail specified, fields 'key' and 'value' cannot be null, please specify details in the form:  details[0].key=XXX&details[0].value=YYY");
                }
                // validate the zone detail keys are known keys
                /*
                 * if(!ZoneConfig.doesKeyExist(key)){ throw new
                 * InvalidParameterValueException
                 * ("Invalid Zone Detail parameter: "+ key); }
                 */
                newDetails.put(key, value);
            }
        }

        // add the domain prefix list to details if not null
        if (dnsSearchOrder != null) {
            for (String dom : dnsSearchOrder) {
                if (!NetUtils.verifyDomainName(dom)) {
                    throw new InvalidParameterValueException(
                            "Invalid network domain suffixes. Total length shouldn't exceed 190 chars. Each domain label must be between 1 and 63 characters long, can contain ASCII letters 'a' through 'z', the digits '0' through '9', "
                                    + "and the hyphen ('-'); can't start or end with \"-\"");
                }
            }
            newDetails.put(ZoneConfig.DnsSearchOrder.getName(), StringUtils.join(dnsSearchOrder, ","));
        }

        DataCenterVO zone = _zoneDao.findById(zoneId);
        if (zone == null) {
            throw new InvalidParameterValueException("unable to find zone by id " + zoneId);
        }

        if (zoneName == null) {
            zoneName = zone.getName();
        }

        if ((guestCidr != null) && !NetUtils.validateGuestCidr(guestCidr)) {
            throw new InvalidParameterValueException("Please enter a valid guest cidr");
        }

        // Make sure the zone exists
        if (!validZone(zoneId)) {
            throw new InvalidParameterValueException("A zone with ID: " + zoneId + " does not exist.");
        }

        String oldZoneName = zone.getName();

        if (zoneName == null) {
            zoneName = oldZoneName;
        }

        if (dns1 == null) {
            dns1 = zone.getDns1();
        }

        if (dns2 == null) {
            dns2 = zone.getDns2();
        }

        if (internalDns1 == null) {
            internalDns1 = zone.getInternalDns1();
        }

        if (internalDns2 == null) {
        	internalDns2 = zone.getInternalDns2();
        }
        
        if (guestCidr == null) {
            guestCidr = zone.getGuestNetworkCidr();
        }

        // validate network domain
        if (networkDomain != null && !networkDomain.isEmpty()) {
            if (!NetUtils.verifyDomainName(networkDomain)) {
                throw new InvalidParameterValueException(
                        "Invalid network domain. Total length shouldn't exceed 190 chars. Each domain label must be between 1 and 63 characters long, can contain ASCII letters 'a' through 'z', the digits '0' through '9', "
                                + "and the hyphen ('-'); can't start or end with \"-\"");
            }
        }

        boolean checkForDuplicates = !zoneName.equals(oldZoneName);
        checkZoneParameters(zoneName, dns1, dns2, internalDns1, internalDns2, checkForDuplicates, null, allocationStateStr);// not
        // allowing
        // updating
        // domain
        // associated
        // with
        // a
        // zone,
        // once
        // created

        zone.setName(zoneName);
        zone.setDns1(dns1);
        zone.setDns2(dns2);
        zone.setInternalDns1(internalDns1);
        zone.setInternalDns2(internalDns2);
        zone.setGuestNetworkCidr(guestCidr);
        if (localStorageEnabled != null) {
            zone.setLocalStorageEnabled(localStorageEnabled.booleanValue());
        }

        if (networkDomain != null) {
            if (networkDomain.isEmpty()) {
                zone.setDomain(null);
            } else {
                zone.setDomain(networkDomain);
            }
        }

        // update a private zone to public; not vice versa
        if (isPublic != null && isPublic) {
            zone.setDomainId(null);
            zone.setDomain(null);
        }

        Transaction txn = Transaction.currentTxn();
        txn.start();

        Map<String, String> updatedDetails = new HashMap<String, String>();
        _zoneDao.loadDetails(zone);
        if (zone.getDetails() != null) {
            updatedDetails.putAll(zone.getDetails());
        }
        updatedDetails.putAll(newDetails);
        zone.setDetails(updatedDetails);

        if (allocationStateStr != null && !allocationStateStr.isEmpty()) {
            Grouping.AllocationState allocationState = Grouping.AllocationState.valueOf(allocationStateStr);

            if (allocationState == Grouping.AllocationState.Enabled) {
                // check if zone has necessary trafficTypes before enabling
                try {
                    PhysicalNetwork mgmtPhyNetwork;
                    if (NetworkType.Advanced == zone.getNetworkType()) {
                        // zone should have a physical network with public and management traffiType
                        _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Public);
                        mgmtPhyNetwork = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Management);
                    } else {
                        // zone should have a physical network with management traffiType
                        mgmtPhyNetwork = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Management);
                    }

                    try {
                        _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Storage);
                    } catch (InvalidParameterValueException noStorage) {
                        PhysicalNetworkTrafficTypeVO mgmtTraffic = _trafficTypeDao.findBy(mgmtPhyNetwork.getId(), TrafficType.Management);
                        _networkSvc.addTrafficTypeToPhysicalNetwork(mgmtPhyNetwork.getId(), TrafficType.Storage.toString(), mgmtTraffic.getXenNetworkLabel(), mgmtTraffic.getKvmNetworkLabel(),
                                mgmtTraffic.getVmwareNetworkLabel(), mgmtTraffic.getSimulatorNetworkLabel(), mgmtTraffic.getVlan());
                        s_logger.info("No storage traffic type was specified by admin, create default storage traffic on physical network " + mgmtPhyNetwork.getId() + " with same configure of management traffic type");
                    }
                } catch (InvalidParameterValueException ex) {
                    throw new InvalidParameterValueException("Cannot enable this Zone since: " + ex.getMessage());
                }
            }
            _capacityDao.updateCapacityState(zone.getId(), null, null, null, allocationStateStr);
            zone.setAllocationState(allocationState);
        }

        if (dhcpProvider != null) {
            zone.setDhcpProvider(dhcpProvider);
        }

        if (!_zoneDao.update(zoneId, zone)) {
            throw new CloudRuntimeException("Failed to edit zone. Please contact Cloud Support.");
        }

        txn.commit();
        return zone;
    }

    @Override
    @DB
    public DataCenterVO createZone(long userId, String zoneName, String dns1, String dns2, String internalDns1, String internalDns2, String guestCidr, String domain, Long domainId,
            NetworkType zoneType, String allocationStateStr, String networkDomain, boolean isSecurityGroupEnabled, boolean isLocalStorageEnabled) {

        // checking the following params outside checkzoneparams method as we do
        // not use these params for updatezone
        // hence the method below is generic to check for common params
        if ((guestCidr != null) && !NetUtils.validateGuestCidr(guestCidr)) {
            throw new InvalidParameterValueException("Please enter a valid guest cidr");
        }

        // Validate network domain
        if (networkDomain != null) {
            if (!NetUtils.verifyDomainName(networkDomain)) {
                throw new InvalidParameterValueException(
                        "Invalid network domain. Total length shouldn't exceed 190 chars. Each domain label must be between 1 and 63 characters long, can contain ASCII letters 'a' through 'z', the digits '0' through '9', "
                                + "and the hyphen ('-'); can't start or end with \"-\"");
            }
        }

        checkZoneParameters(zoneName, dns1, dns2, internalDns1, internalDns2, true, domainId, allocationStateStr);

        byte[] bytes = (zoneName + System.currentTimeMillis()).getBytes();
        String zoneToken = UUID.nameUUIDFromBytes(bytes).toString();
        Transaction txn = Transaction.currentTxn();
        try {
            txn.start();
            // Create the new zone in the database
            DataCenterVO zone = new DataCenterVO(zoneName, null, dns1, dns2, internalDns1, internalDns2, guestCidr, domain, domainId, zoneType, zoneToken, networkDomain, isSecurityGroupEnabled, isLocalStorageEnabled);
            if (allocationStateStr != null && !allocationStateStr.isEmpty()) {
                Grouping.AllocationState allocationState = Grouping.AllocationState.valueOf(allocationStateStr);
                zone.setAllocationState(allocationState);
            } else {
                // Zone will be disabled since 3.0. Admin shoul enable it after physical network and providers setup.
                zone.setAllocationState(Grouping.AllocationState.Disabled);
            }
            zone = _zoneDao.persist(zone);

            // Create default system networks
            createDefaultSystemNetworks(zone.getId());

            _swiftMgr.propagateSwiftTmplteOnZone(zone.getId());
            _s3Mgr.propagateTemplatesToZone(zone);
            txn.commit();
            return zone;
        } catch (Exception ex) {
            txn.rollback();
            s_logger.warn("Exception: ", ex);
            throw new CloudRuntimeException("Fail to create a network");
        } finally {
            txn.close();
        }
    }

    @Override
    public void createDefaultSystemNetworks(long zoneId) throws ConcurrentOperationException {
        DataCenterVO zone = _zoneDao.findById(zoneId);
        String networkDomain = null;
        // Create public, management, control and storage networks as a part of
        // the zone creation
        if (zone != null) {
            List<NetworkOfferingVO> ntwkOff = _networkOfferingDao.listSystemNetworkOfferings();

            for (NetworkOfferingVO offering : ntwkOff) {
                DataCenterDeployment plan = new DataCenterDeployment(zone.getId(), null, null, null, null, null);
                NetworkVO userNetwork = new NetworkVO();

                Account systemAccount = _accountDao.findById(Account.ACCOUNT_ID_SYSTEM);

                BroadcastDomainType broadcastDomainType = null;
                if (offering.getTrafficType() == TrafficType.Management) {
                    broadcastDomainType = BroadcastDomainType.Native;
                } else if (offering.getTrafficType() == TrafficType.Control) {
                    broadcastDomainType = BroadcastDomainType.LinkLocal;
                } else if (offering.getTrafficType() == TrafficType.Public) {
                    if ((zone.getNetworkType() == NetworkType.Advanced && !zone.isSecurityGroupEnabled()) || zone.getNetworkType() == NetworkType.Basic) {
                        broadcastDomainType = BroadcastDomainType.Vlan;
                    } else {
                        continue;
                    }
                } else if (offering.getTrafficType() == TrafficType.Guest) {
                    continue;
                }

                userNetwork.setBroadcastDomainType(broadcastDomainType);
                userNetwork.setNetworkDomain(networkDomain);
                _networkMgr.setupNetwork(systemAccount, offering, userNetwork, plan, null, null, false, 
                        Domain.ROOT_DOMAIN, null, null, null);
            }
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_ZONE_CREATE, eventDescription = "creating zone", async = false)
    public DataCenter createZone(CreateZoneCmd cmd) {
        // grab parameters from the command
        Long userId = UserContext.current().getCallerUserId();
        String zoneName = cmd.getZoneName();
        String dns1 = cmd.getDns1();
        String dns2 = cmd.getDns2();
        String internalDns1 = cmd.getInternalDns1();
        String internalDns2 = cmd.getInternalDns2();
        String guestCidr = cmd.getGuestCidrAddress();
        Long domainId = cmd.getDomainId();
        String type = cmd.getNetworkType();
        Boolean isBasic = false;
        String allocationState = cmd.getAllocationState();
        String networkDomain = cmd.getDomain();
        boolean isSecurityGroupEnabled = cmd.getSecuritygroupenabled();
        boolean isLocalStorageEnabled = cmd.getLocalStorageEnabled();

        if (allocationState == null) {
            allocationState = Grouping.AllocationState.Disabled.toString();
        }

        if (!(type.equalsIgnoreCase(NetworkType.Basic.toString())) && !(type.equalsIgnoreCase(NetworkType.Advanced.toString()))) {
            throw new InvalidParameterValueException("Invalid zone type; only Advanced and Basic values are supported");
        } else if (type.equalsIgnoreCase(NetworkType.Basic.toString())) {
            isBasic = true;
        }

        NetworkType zoneType = isBasic ? NetworkType.Basic : NetworkType.Advanced;

        // error out when the parameter specified for Basic zone
        if (zoneType == NetworkType.Basic && guestCidr != null) {
            throw new InvalidParameterValueException("guestCidrAddress parameter is not supported for Basic zone");
        }

        DomainVO domainVO = null;

        if (userId == null) {
            userId = User.UID_SYSTEM;
        }

        if (domainId != null) {
            domainVO = _domainDao.findById(domainId);
        }

        if (zoneType == NetworkType.Basic) {
            isSecurityGroupEnabled = true;
        }

        return createZone(userId, zoneName, dns1, dns2, internalDns1, internalDns2, guestCidr, domainVO != null ? domainVO.getName() : null, domainId, zoneType, allocationState, networkDomain,
                isSecurityGroupEnabled, isLocalStorageEnabled);
    }

    @Override
    public ServiceOffering createServiceOffering(CreateServiceOfferingCmd cmd) {
        Long userId = UserContext.current().getCallerUserId();

        String name = cmd.getServiceOfferingName();
        if ((name == null) || (name.length() == 0)) {
            throw new InvalidParameterValueException("Failed to create service offering: specify the name that has non-zero length");
        }

        String displayText = cmd.getDisplayText();
        if ((displayText == null) || (displayText.length() == 0)) {
            throw new InvalidParameterValueException("Failed to create service offering " + name + ": specify the display text that has non-zero length");
        }

        Long cpuNumber = cmd.getCpuNumber();
        if ((cpuNumber == null) || (cpuNumber.intValue() <= 0) || (cpuNumber.intValue() > 2147483647)) {
            throw new InvalidParameterValueException("Failed to create service offering " + name + ": specify the cpu number value between 1 and 2147483647");
        }

        Long cpuSpeed = cmd.getCpuSpeed();
        if ((cpuSpeed == null) || (cpuSpeed.intValue() <= 0) || (cpuSpeed.intValue() > 2147483647)) {
            throw new InvalidParameterValueException("Failed to create service offering " + name + ": specify the cpu speed value between 1 and 2147483647");
        }

        Long memory = cmd.getMemory();
        if ((memory == null) || (memory.intValue() < 32) || (memory.intValue() > 2147483647)) {
            throw new InvalidParameterValueException("Failed to create service offering " + name + ": specify the memory value between 32 and 2147483647 MB");
        }

        // check if valid domain
        if (cmd.getDomainId() != null && _domainDao.findById(cmd.getDomainId()) == null) {
            throw new InvalidParameterValueException("Please specify a valid domain id");
        }

        boolean localStorageRequired = false;
        String storageType = cmd.getStorageType();
        if (storageType != null) {
            if (storageType.equalsIgnoreCase(ServiceOffering.StorageType.local.toString())) {
                localStorageRequired = true;
            } else if (!storageType.equalsIgnoreCase(ServiceOffering.StorageType.shared.toString())) {
                throw new InvalidParameterValueException("Invalid storage type " + storageType + " specified, valid types are: 'local' and 'shared'");
            }
        }

        Boolean offerHA = cmd.getOfferHa();
        if (offerHA == null) {
            offerHA = false;
        }

        Boolean limitCpuUse = cmd.GetLimitCpuUse();
        if (limitCpuUse == null) {
            limitCpuUse = false;
        }

        String vmTypeString = cmd.getSystemVmType();
        VirtualMachine.Type vmType = null;
        boolean allowNetworkRate = false;
        if (cmd.getIsSystem()) {
            if (vmTypeString == null || VirtualMachine.Type.DomainRouter.toString().toLowerCase().equals(vmTypeString)) {
                vmType = VirtualMachine.Type.DomainRouter;
                allowNetworkRate = true;
            } else if (VirtualMachine.Type.ConsoleProxy.toString().toLowerCase().equals(vmTypeString)) {
                vmType = VirtualMachine.Type.ConsoleProxy;
            } else if (VirtualMachine.Type.SecondaryStorageVm.toString().toLowerCase().equals(vmTypeString)) {
                vmType = VirtualMachine.Type.SecondaryStorageVm;
            } else {
                throw new InvalidParameterValueException("Invalid systemVmType. Supported types are: " + VirtualMachine.Type.DomainRouter + ", " + VirtualMachine.Type.ConsoleProxy + ", "
                        + VirtualMachine.Type.SecondaryStorageVm);
            }
        } else {
            allowNetworkRate = true;
            ;
        }

        if (cmd.getNetworkRate() != null && !allowNetworkRate) {
            throw new InvalidParameterValueException("Network rate can be specified only for non-System offering and system offerings having \"domainrouter\" systemvmtype");
        }

        return createServiceOffering(userId, cmd.getIsSystem(), vmType, cmd.getServiceOfferingName(), cpuNumber.intValue(), memory.intValue(), cpuSpeed.intValue(), cmd.getDisplayText(),
                localStorageRequired, offerHA, limitCpuUse, cmd.getTags(), cmd.getDomainId(), cmd.getHostTag(), cmd.getNetworkRate());
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_SERVICE_OFFERING_CREATE, eventDescription = "creating service offering")
    public ServiceOfferingVO createServiceOffering(long userId, boolean isSystem, VirtualMachine.Type vm_type, String name, int cpu, int ramSize, int speed, String displayText,
            boolean localStorageRequired, boolean offerHA, boolean limitResourceUse, String tags, Long domainId, String hostTag, Integer networkRate) {
        tags = cleanupTags(tags);
        ServiceOfferingVO offering = new ServiceOfferingVO(name, cpu, ramSize, speed, networkRate, null, offerHA, limitResourceUse, displayText, localStorageRequired, false, tags, isSystem, vm_type,
                domainId, hostTag);

        if ((offering = _serviceOfferingDao.persist(offering)) != null) {
            UserContext.current().setEventDetails("Service offering id=" + offering.getId());
            return offering;
        } else {
            return null;
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_SERVICE_OFFERING_EDIT, eventDescription = "updating service offering")
    public ServiceOffering updateServiceOffering(UpdateServiceOfferingCmd cmd) {
        String displayText = cmd.getDisplayText();
        Long id = cmd.getId();
        String name = cmd.getServiceOfferingName();
        Integer sortKey = cmd.getSortKey();
        Long userId = UserContext.current().getCallerUserId();

        if (userId == null) {
            userId = Long.valueOf(User.UID_SYSTEM);
        }

        // Verify input parameters
        ServiceOffering offeringHandle = getServiceOffering(id);

        if (offeringHandle == null) {
            throw new InvalidParameterValueException("unable to find service offering " + id);
        }

        boolean updateNeeded = (name != null || displayText != null || sortKey != null);
        if (!updateNeeded) {
            return _serviceOfferingDao.findById(id);
        }

        ServiceOfferingVO offering = _serviceOfferingDao.createForUpdate(id);

        if (name != null) {
            offering.setName(name);
        }

        if (displayText != null) {
            offering.setDisplayText(displayText);
        }

        if (sortKey != null) {
            offering.setSortKey(sortKey);
        }

        // Note: tag editing commented out for now; keeping the code intact,
        // might need to re-enable in next releases
        // if (tags != null)
        // {
        // if (tags.trim().isEmpty() && offeringHandle.getTags() == null)
        // {
        // //no new tags; no existing tags
        // offering.setTagsArray(csvTagsToList(null));
        // }
        // else if (!tags.trim().isEmpty() && offeringHandle.getTags() != null)
        // {
        // //new tags + existing tags
        // List<String> oldTags = csvTagsToList(offeringHandle.getTags());
        // List<String> newTags = csvTagsToList(tags);
        // oldTags.addAll(newTags);
        // offering.setTagsArray(oldTags);
        // }
        // else if(!tags.trim().isEmpty())
        // {
        // //new tags; NO existing tags
        // offering.setTagsArray(csvTagsToList(tags));
        // }
        // }

        if (_serviceOfferingDao.update(id, offering)) {
            offering = _serviceOfferingDao.findById(id);
            UserContext.current().setEventDetails("Service offering id=" + offering.getId());
            return offering;
        } else {
            return null;
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_DISK_OFFERING_CREATE, eventDescription = "creating disk offering")
    public DiskOfferingVO createDiskOffering(Long domainId, String name, String description, Long numGibibytes, String tags, boolean isCustomized, boolean localStorageRequired) {
        long diskSize = 0;// special case for custom disk offerings
        if (numGibibytes != null && (numGibibytes <= 0)) {
            throw new InvalidParameterValueException("Please specify a disk size of at least 1 Gb.");
        } else if (numGibibytes != null && (numGibibytes > _maxVolumeSizeInGb)) {
            throw new InvalidParameterValueException("The maximum size for a disk is " + _maxVolumeSizeInGb + " Gb.");
        }

        if (numGibibytes != null) {
            diskSize = numGibibytes * 1024 * 1024 * 1024;
        }

        if (diskSize == 0) {
            isCustomized = true;
        }

        tags = cleanupTags(tags);
        DiskOfferingVO newDiskOffering = new DiskOfferingVO(domainId, name, description, diskSize, tags, isCustomized);
        newDiskOffering.setUseLocalStorage(localStorageRequired);
        UserContext.current().setEventDetails("Disk offering id=" + newDiskOffering.getId());
        DiskOfferingVO offering = _diskOfferingDao.persist(newDiskOffering);
        if (offering != null) {
            UserContext.current().setEventDetails("Disk offering id=" + newDiskOffering.getId());
            return offering;
        } else {
            return null;
        }
    }

    @Override
    public DiskOffering createDiskOffering(CreateDiskOfferingCmd cmd) {
        String name = cmd.getOfferingName();
        String description = cmd.getDisplayText();
        Long numGibibytes = cmd.getDiskSize();
        boolean isCustomized = cmd.isCustomized() != null ? cmd.isCustomized() : false; // false
                                                                                        // by
                                                                                        // default
        String tags = cmd.getTags();
        // Long domainId = cmd.getDomainId() != null ? cmd.getDomainId() :
        // Long.valueOf(DomainVO.ROOT_DOMAIN); // disk offering
        // always gets created under the root domain.Bug # 6055 if not passed in
        // cmd
        Long domainId = cmd.getDomainId();

        if (!isCustomized && numGibibytes == null) {
            throw new InvalidParameterValueException("Disksize is required for non-customized disk offering");
        }

        boolean localStorageRequired = false;
        String storageType = cmd.getStorageType();
        if (storageType != null) {
            if (storageType.equalsIgnoreCase(ServiceOffering.StorageType.local.toString())) {
                localStorageRequired = true;
            } else if (!storageType.equalsIgnoreCase(ServiceOffering.StorageType.shared.toString())) {
                throw new InvalidParameterValueException("Invalid storage type " + storageType + " specified, valid types are: 'local' and 'shared'");
            }
        }

        return createDiskOffering(domainId, name, description, numGibibytes, tags, isCustomized, localStorageRequired);
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_DISK_OFFERING_EDIT, eventDescription = "updating disk offering")
    public DiskOffering updateDiskOffering(UpdateDiskOfferingCmd cmd) {
        Long diskOfferingId = cmd.getId();
        String name = cmd.getDiskOfferingName();
        String displayText = cmd.getDisplayText();
        Integer sortKey = cmd.getSortKey();

        // Check if diskOffering exists
        DiskOffering diskOfferingHandle = getDiskOffering(diskOfferingId);

        if (diskOfferingHandle == null) {
            throw new InvalidParameterValueException("Unable to find disk offering by id " + diskOfferingId);
        }

        boolean updateNeeded = (name != null || displayText != null || sortKey != null);
        if (!updateNeeded) {
            return _diskOfferingDao.findById(diskOfferingId);
        }

        DiskOfferingVO diskOffering = _diskOfferingDao.createForUpdate(diskOfferingId);

        if (name != null) {
            diskOffering.setName(name);
        }

        if (displayText != null) {
            diskOffering.setDisplayText(displayText);
        }

        if (sortKey != null) {
            diskOffering.setSortKey(sortKey);
        }

        // Note: tag editing commented out for now;keeping the code intact,
        // might need to re-enable in next releases
        // if (tags != null)
        // {
        // if (tags.trim().isEmpty() && diskOfferingHandle.getTags() == null)
        // {
        // //no new tags; no existing tags
        // diskOffering.setTagsArray(csvTagsToList(null));
        // }
        // else if (!tags.trim().isEmpty() && diskOfferingHandle.getTags() !=
        // null)
        // {
        // //new tags + existing tags
        // List<String> oldTags = csvTagsToList(diskOfferingHandle.getTags());
        // List<String> newTags = csvTagsToList(tags);
        // oldTags.addAll(newTags);
        // diskOffering.setTagsArray(oldTags);
        // }
        // else if(!tags.trim().isEmpty())
        // {
        // //new tags; NO existing tags
        // diskOffering.setTagsArray(csvTagsToList(tags));
        // }
        // }

        if (_diskOfferingDao.update(diskOfferingId, diskOffering)) {
            UserContext.current().setEventDetails("Disk offering id=" + diskOffering.getId());
            return _diskOfferingDao.findById(diskOfferingId);
        } else {
            return null;
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_DISK_OFFERING_DELETE, eventDescription = "deleting disk offering")
    public boolean deleteDiskOffering(DeleteDiskOfferingCmd cmd) {
        Long diskOfferingId = cmd.getId();

        DiskOffering offering = getDiskOffering(diskOfferingId);

        if (offering == null) {
            throw new InvalidParameterValueException("Unable to find disk offering by id " + diskOfferingId);
        }

        if (_diskOfferingDao.remove(diskOfferingId)) {
            UserContext.current().setEventDetails("Disk offering id=" + diskOfferingId);
            return true;
        } else {
            return false;
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_SERVICE_OFFERING_DELETE, eventDescription = "deleting service offering")
    public boolean deleteServiceOffering(DeleteServiceOfferingCmd cmd) {

        Long offeringId = cmd.getId();
        Long userId = UserContext.current().getCallerUserId();

        if (userId == null) {
            userId = Long.valueOf(User.UID_SYSTEM);
        }

        // Verify service offering id
        ServiceOffering offering = getServiceOffering(offeringId);
        if (offering == null) {
            throw new InvalidParameterValueException("unable to find service offering " + offeringId);
        }

        if (offering.getDefaultUse()) {
            throw new InvalidParameterValueException("Default service offerings cannot be deleted");
        }

        if (_serviceOfferingDao.remove(offeringId)) {
            UserContext.current().setEventDetails("Service offering id=" + offeringId);
            return true;
        } else {
            return false;
        }
    }

    @Override
    @DB
    @ActionEvent(eventType = EventTypes.EVENT_VLAN_IP_RANGE_CREATE, eventDescription = "creating vlan ip range", async = false)
    public Vlan createVlanAndPublicIpRange(CreateVlanIpRangeCmd cmd) throws InsufficientCapacityException, ConcurrentOperationException, ResourceUnavailableException, ResourceAllocationException {
        Long zoneId = cmd.getZoneId();
        Long podId = cmd.getPodId();
        String startIP = cmd.getStartIp();
        String endIP = cmd.getEndIp();
        String vlanGateway = cmd.getGateway();
        String vlanNetmask = cmd.getNetmask();
        Long userId = UserContext.current().getCallerUserId();
        String vlanId = cmd.getVlan();
        Boolean forVirtualNetwork = cmd.isForVirtualNetwork();
        Long networkId = cmd.getNetworkID();
        Long physicalNetworkId = cmd.getPhysicalNetworkId();
        String accountName = cmd.getAccountName();
        Long projectId = cmd.getProjectId();
        Long domainId = cmd.getDomainId();
        Account vlanOwner = null;
        
        // if end ip is not specified, default it to startIp
        if (endIP == null && startIP != null) {
            endIP = startIP;
        }
        
        if (projectId != null) {
            if (accountName != null) {
                throw new InvalidParameterValueException("Account and projectId are mutually exclusive");
            }
            Project project = _projectMgr.getProject(projectId);
            if (project == null) {
                throw new InvalidParameterValueException("Unable to find project by id " + projectId);
            }

            vlanOwner = _accountMgr.getAccount(project.getProjectAccountId());
        }

        if ((accountName != null) && (domainId != null)) {
            vlanOwner = _accountDao.findActiveAccount(accountName, domainId);
            if (vlanOwner == null) {
                throw new InvalidParameterValueException("Please specify a valid account.");
            }
        }

        // Verify that network exists
        Network network = null;
        if (networkId != null) {
            network = _networkDao.findById(networkId);
            if (network == null) {
                throw new InvalidParameterValueException("Unable to find network by id " + networkId);
            } else {
                zoneId = network.getDataCenterId();
                physicalNetworkId = network.getPhysicalNetworkId();
            }
        }
        
        // Verify that zone exists
        DataCenterVO zone = _zoneDao.findById(zoneId);
        if (zone == null) {
            throw new InvalidParameterValueException("Unable to find zone by id " + zoneId);
        }

        // verify that physical network exists
        PhysicalNetworkVO pNtwk = null;
        if (physicalNetworkId != null) {
            pNtwk = _physicalNetworkDao.findById(physicalNetworkId);
            if (pNtwk == null) {
                throw new InvalidParameterValueException("Unable to find Physical Network with id=" + physicalNetworkId);
            }
            if (zoneId == null) {
                zoneId = pNtwk.getDataCenterId();
            }
        } else {
            if (zoneId == null) {
                throw new InvalidParameterValueException("");
            }
            // deduce physicalNetworkFrom Zone or Network.
            if (network != null && network.getPhysicalNetworkId() != null) {
                physicalNetworkId = network.getPhysicalNetworkId();
            } else {
                if (forVirtualNetwork) {
                    // default physical network with public traffic in the zone
                    physicalNetworkId = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Public).getId();
                } else {
                    if (zone.getNetworkType() == DataCenter.NetworkType.Basic) {
                        // default physical network with guest traffic in the zone
                        physicalNetworkId = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Guest).getId();
                    } else if (zone.getNetworkType() == DataCenter.NetworkType.Advanced) {
                        if (zone.isSecurityGroupEnabled()) {
                            physicalNetworkId = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(zoneId, TrafficType.Guest).getId();
                        } else {
                            throw new InvalidParameterValueException("Physical Network Id is null, please provide the Network id for Direct vlan creation ");
                        }
                    }
                }
            }
        }
        
        
        // Check if zone is enabled
        Account caller = UserContext.current().getCaller();
        if (Grouping.AllocationState.Disabled == zone.getAllocationState() && !_accountMgr.isRootAdmin(caller.getType())) {
            throw new PermissionDeniedException("Cannot perform this operation, Zone is currently disabled: " + zoneId);
        } 

        if (zone.isSecurityGroupEnabled() && zone.getNetworkType() != DataCenter.NetworkType.Basic && forVirtualNetwork) {
            throw new InvalidParameterValueException("Can't add virtual ip range into a zone with security group enabled");
        }

        // If networkId is not specified, and vlan is Virtual or Direct Untagged, try to locate default networks
        if (forVirtualNetwork) {
            if (network == null) {
                // find default public network in the zone
                networkId = _networkModel.getSystemNetworkByZoneAndTrafficType(zoneId, TrafficType.Public).getId();
                network = _networkModel.getNetwork(networkId);
            } else if (network.getGuestType() != null || network.getTrafficType() != TrafficType.Public) {
                throw new InvalidParameterValueException("Can't find Public network by id=" + networkId);
            }
        } else {
            if (network == null) {
                if (zone.getNetworkType() == DataCenter.NetworkType.Basic) {
                    networkId = _networkModel.getExclusiveGuestNetwork(zoneId).getId();
                    network = _networkModel.getNetwork(networkId);
                } else {
                    network = _networkModel.getNetworkWithSecurityGroupEnabled(zoneId);
                    if (network == null) {
                        throw new InvalidParameterValueException("Nework id is required for Direct vlan creation ");
                    }
                    networkId = network.getId();
                    zoneId = network.getDataCenterId();
                }
            } else if (network.getGuestType() == null || network.getGuestType() == Network.GuestType.Isolated) {
                throw new InvalidParameterValueException("Can't create direct vlan for network id=" + networkId + " with type: " + network.getGuestType());
            }
        }

        // Can add vlan range only to the network which allows it
        if (!network.getSpecifyIpRanges()) {
            throw new InvalidParameterValueException("Network " + network + " doesn't support adding ip ranges");
        }

        // if end ip is not specified, default it to startIp
        if (endIP == null && startIP != null) {
            endIP = startIP;
        }

        if ( zone.getNetworkType() == DataCenter.NetworkType.Advanced ) {
            if (network.getTrafficType() == TrafficType.Guest) {
                if (network.getGuestType() != GuestType.Shared) {
                    throw new InvalidParameterValueException("Can execute createVLANIpRanges on shared guest network, but type of this guest network "
                            + network.getId() + " is " + network.getGuestType());
                }
                List<VlanVO> vlans = _vlanDao.listVlansByNetworkId(network.getId());
                if ( vlans != null && vlans.size() > 0 ) {
                    VlanVO vlan = vlans.get(0);
                    if ( vlanId == null ) {
                        vlanId = vlan.getVlanTag();
                    } else if ( vlan.getVlanTag() != vlanId ) {
                        throw new InvalidParameterValueException("there is already one vlan " + vlan.getVlanTag() + " on network :" +
                                + network.getId() + ", only one vlan is allowed on guest network");
                    }
                    vlanGateway = vlan.getVlanGateway();
                    vlanNetmask = vlan.getVlanNetmask();
                }
            } else if (network.getTrafficType() == TrafficType.Management) {
                throw new InvalidParameterValueException("Cannot execute createVLANIpRanges on management network");
            }
        }

        if (vlanGateway == null || vlanNetmask == null || zoneId == null) {
            throw new InvalidParameterValueException("Gateway, netmask and zoneId have to be passed in for virtual and direct untagged networks");
        }


        // if it's an account specific range, associate ip address list to the account
        boolean associateIpRangeToAccount = false;

        if (forVirtualNetwork) {
            if (vlanOwner != null) {

                long accountIpRange = NetUtils.ip2Long(endIP) - NetUtils.ip2Long(startIP) + 1;

                //check resource limits
                _resourceLimitMgr.checkResourceLimit(vlanOwner, ResourceType.public_ip, accountIpRange);
                
                associateIpRangeToAccount = true;
            }
        }

        // Check if the IP range overlaps with the private ip
        checkOverlapPrivateIpRange(zoneId, startIP, endIP);
        Transaction txn = Transaction.currentTxn();
        txn.start();

        Vlan vlan = createVlanAndPublicIpRange(zoneId, networkId, physicalNetworkId, forVirtualNetwork, podId, startIP, 
                endIP, vlanGateway, vlanNetmask, vlanId, vlanOwner);

        if (associateIpRangeToAccount) {
            _networkMgr.associateIpAddressListToAccount(userId, vlanOwner.getId(), zoneId, vlan.getId(), null);
        }
        txn.commit();

        // Associate ips to the network
        if (associateIpRangeToAccount) {
            if (network.getState() == Network.State.Implemented) {
                s_logger.debug("Applying ip associations for vlan id=" + vlanId + " in network " + network);
                if (!_networkMgr.applyIpAssociations(network, false)) {
                    s_logger.warn("Failed to apply ip associations for vlan id=1 as a part of add vlan range for account id=" + vlanOwner.getId());
                }
            } else {
                s_logger.trace("Network id=" + network.getId() + " is not Implemented, no need to apply ipAssociations");
            }
        }

        return vlan;
    }

    @Override
    @DB
    public Vlan createVlanAndPublicIpRange(long zoneId, long networkId, long physicalNetworkId, boolean forVirtualNetwork, Long podId, 
            String startIP, String endIP, String vlanGateway, String vlanNetmask,
            String vlanId, Account vlanOwner) {
        
        
        Network network = _networkModel.getNetwork(networkId);
        
        //Validate the zone
        DataCenterVO zone = _zoneDao.findById(zoneId);
        if (zone == null) {
            throw new InvalidParameterValueException("Please specify a valid zone.");
        }
        
        // ACL check
        checkZoneAccess(UserContext.current().getCaller(), zone);
        
        //Validate the physical network
        if (_physicalNetworkDao.findById(physicalNetworkId) == null) {
            throw new InvalidParameterValueException("Please specify a valid physical network id");
        }
        
        //Validate the pod
        if (podId != null) {
            Pod pod = _podDao.findById(podId);
            if (pod == null) {
                throw new InvalidParameterValueException("Please specify a valid pod.");
            }
            if (pod.getDataCenterId() != zoneId) {
                throw new InvalidParameterValueException("Pod id=" + podId + " doesn't belong to zone id=" + zoneId);
            }
            //pod vlans can be created in basic zone only
            if (zone.getNetworkType() != NetworkType.Basic || network.getTrafficType() != TrafficType.Guest) {
                throw new InvalidParameterValueException("Pod id can be specified only for the networks of type " 
                                                        + TrafficType.Guest + " in zone of type " + NetworkType.Basic);                  
            }
        }
        
        //1) if vlan is specified for the guest network range, it should be the same as network's vlan
        //2) if vlan is missing, default it to the guest network's vlan
        if (network.getTrafficType() == TrafficType.Guest) {
            String networkVlanId = null;
            URI uri = network.getBroadcastUri();
            if (uri != null) {
                String[] vlan = uri.toString().split("vlan:\\/\\/");
                networkVlanId = vlan[1];
            }
            
            if (vlanId != null) {
                // if vlan is specified, throw an error if it's not equal to network's vlanId
                if (networkVlanId != null && !networkVlanId.equalsIgnoreCase(vlanId)) {
                    throw new InvalidParameterValueException("Vlan doesn't match vlan of the network");
                }
            } else {
                vlanId = networkVlanId;
            }
        } else if (network.getTrafficType() == TrafficType.Public && vlanId == null) {
            //vlan id is required for public network
            throw new InvalidParameterValueException("Vlan id is required when add ip range to the public network");
        }
        
        if (vlanId == null) {
            vlanId = Vlan.UNTAGGED;
        }

        VlanType vlanType = forVirtualNetwork ? VlanType.VirtualNetwork : VlanType.DirectAttached;
        
        
        if (vlanOwner != null && zone.getNetworkType() != NetworkType.Advanced) {
            throw new InvalidParameterValueException("Vlan owner can be defined only in the zone of type " + NetworkType.Advanced);
        }

        // Make sure the gateway is valid
        if (!NetUtils.isValidIp(vlanGateway)) {
            throw new InvalidParameterValueException("Please specify a valid gateway");
        }

        // Make sure the netmask is valid
        if (!NetUtils.isValidIp(vlanNetmask)) {
            throw new InvalidParameterValueException("Please specify a valid netmask");
        }

        String newVlanSubnet = NetUtils.getSubNet(vlanGateway, vlanNetmask);

        // Check if the new VLAN's subnet conflicts with the guest network in
        // the specified zone (guestCidr is null for basic zone)
        String guestNetworkCidr = zone.getGuestNetworkCidr();
        if (guestNetworkCidr != null) {
            String[] cidrPair = guestNetworkCidr.split("\\/");
            String guestIpNetwork = NetUtils.getIpRangeStartIpFromCidr(cidrPair[0], Long.parseLong(cidrPair[1]));
            long guestCidrSize = Long.parseLong(cidrPair[1]);
            long vlanCidrSize = NetUtils.getCidrSize(vlanNetmask);

            long cidrSizeToUse = -1;
            if (vlanCidrSize < guestCidrSize) {
                cidrSizeToUse = vlanCidrSize;
            } else {
                cidrSizeToUse = guestCidrSize;
            }

            String guestSubnet = NetUtils.getCidrSubNet(guestIpNetwork, cidrSizeToUse);

            if (newVlanSubnet.equals(guestSubnet)) {
                throw new InvalidParameterValueException("The new IP range you have specified has the same subnet as the guest network in zone: " + zone.getName()
                        + ". Please specify a different gateway/netmask.");
            }
        }

        // Check if there are any errors with the IP range
        checkPublicIpRangeErrors(zoneId, vlanId, vlanGateway, vlanNetmask, startIP, endIP);

        // Throw an exception if any of the following is true:
        // 1. Another VLAN in the same zone has a different tag but the same
        // subnet as the new VLAN. Make an exception for the
        // case when both vlans are Direct.
        // 2. Another VLAN in the same zone that has the same tag and subnet as
        // the new VLAN has IPs that overlap with the IPs
        // being added
        // 3. Another VLAN in the same zone that has the same tag and subnet as
        // the new VLAN has a different gateway than the
        // new VLAN
        // 4. If VLAN is untagged and Virtual, and there is existing UNTAGGED
        // vlan with different subnet
        List<VlanVO> vlans = _vlanDao.listByZone(zone.getId());
        for (VlanVO vlan : vlans) {
            String otherVlanGateway = vlan.getVlanGateway();
            String otherVlanSubnet = NetUtils.getSubNet(vlan.getVlanGateway(), vlan.getVlanNetmask());
            String[] otherVlanIpRange = vlan.getIpRange().split("\\-");
            String otherVlanStartIP = otherVlanIpRange[0];
            String otherVlanEndIP = null;
            if (otherVlanIpRange.length > 1) {
                otherVlanEndIP = otherVlanIpRange[1];
            }

            if (forVirtualNetwork && !vlanId.equals(vlan.getVlanTag()) && newVlanSubnet.equals(otherVlanSubnet) && !allowIpRangeOverlap(vlan, forVirtualNetwork, networkId)) {
                throw new InvalidParameterValueException("The IP range with tag: " + vlan.getVlanTag() + " in zone " + zone.getName()
                        + " has the same subnet. Please specify a different gateway/netmask.");
            }

            boolean vlansUntaggedAndVirtual = (vlanId.equals(Vlan.UNTAGGED) && vlanId.equals(vlan.getVlanTag()) && forVirtualNetwork && vlan.getVlanType() == VlanType.VirtualNetwork);

            if (vlansUntaggedAndVirtual && !newVlanSubnet.equals(otherVlanSubnet)) {
                throw new InvalidParameterValueException("The Untagged ip range with different subnet already exists in zone " + zone.getId());
            }

            if (vlanId.equals(vlan.getVlanTag()) && newVlanSubnet.equals(otherVlanSubnet)) {
                if (NetUtils.ipRangesOverlap(startIP, endIP, otherVlanStartIP, otherVlanEndIP)) {
                    throw new InvalidParameterValueException("The IP range with tag: " + vlan.getVlanTag()
                            + " already has IPs that overlap with the new range. Please specify a different start IP/end IP.");
                }

                if (!vlanGateway.equals(otherVlanGateway)) {
                    throw new InvalidParameterValueException("The IP range with tag: " + vlan.getVlanTag() + " has already been added with gateway " + otherVlanGateway
                            + ". Please specify a different tag.");
                }
            }
        }

        // Check if a guest VLAN is using the same tag
        if (_zoneDao.findVnet(zoneId, physicalNetworkId, vlanId).size() > 0) {
            throw new InvalidParameterValueException("The VLAN tag " + vlanId + " is already being used for the guest network in zone " + zone.getName());
        }

        // For untagged vlan check if vlan per pod already exists. If yes,
        // verify that new vlan range has the same netmask and gateway
        if (zone.getNetworkType() == NetworkType.Basic && vlanId.equalsIgnoreCase(Vlan.UNTAGGED) && podId != null) {
            List<VlanVO> podVlans = _vlanDao.listVlansForPodByType(podId, VlanType.DirectAttached);
            if (podVlans != null && !podVlans.isEmpty()) {
                VlanVO podVlan = podVlans.get(0);
                if (!podVlan.getVlanNetmask().equals(vlanNetmask)) {
                    throw new InvalidParameterValueException("Vlan netmask is different from the netmask of Untagged vlan id=" + podVlan.getId() + " existing in the pod " + podId);
                } else if (!podVlan.getVlanGateway().equals(vlanGateway)) {
                    throw new InvalidParameterValueException("Vlan gateway is different from the gateway of Untagged vlan id=" + podVlan.getId() + " existing in the pod " + podId);
                }
            }
        }

        String ipRange = startIP;
        if (endIP != null) {
            ipRange += "-" + endIP;
        }

        // Everything was fine, so persist the VLAN
        Transaction txn = Transaction.currentTxn();
        txn.start();

        VlanVO vlan = new VlanVO(vlanType, vlanId, vlanGateway, vlanNetmask, zone.getId(), ipRange, networkId, physicalNetworkId);
        s_logger.debug("Saving vlan range " + vlan);
        vlan = _vlanDao.persist(vlan);

        if (!savePublicIPRange(startIP, endIP, zoneId, vlan.getId(), networkId, physicalNetworkId)) {
            throw new CloudRuntimeException("Failed to save IP range. Please contact Cloud Support."); 
        }

        if (vlanOwner != null) {
            // This VLAN is account-specific, so create an AccountVlanMapVO entry
            AccountVlanMapVO accountVlanMapVO = new AccountVlanMapVO(vlanOwner.getId(), vlan.getId());
            _accountVlanMapDao.persist(accountVlanMapVO);
        } else if (podId != null) {
            // This VLAN is pod-wide, so create a PodVlanMapVO entry
            PodVlanMapVO podVlanMapVO = new PodVlanMapVO(podId, vlan.getId());
            _podVlanMapDao.persist(podVlanMapVO);
        }

        txn.commit();

        return vlan;
    }

    @Override
    @DB
    public boolean deleteVlanAndPublicIpRange(long userId, long vlanDbId, Account caller) {
        VlanVO vlan = _vlanDao.findById(vlanDbId);
        if (vlan == null) {
            throw new InvalidParameterValueException("Please specify a valid IP range id.");
        }
        
        boolean isAccountSpecific = false;
        List<AccountVlanMapVO> acctVln = _accountVlanMapDao.listAccountVlanMapsByVlan(vlan.getId());
        // Check for account wide pool. It will have an entry for account_vlan_map.
        if (acctVln != null && !acctVln.isEmpty()) {
            isAccountSpecific = true;
        }

        // Check if the VLAN has any allocated public IPs
        long allocIpCount = _publicIpAddressDao.countIPs(vlan.getDataCenterId(), vlanDbId, true);
        boolean success = true;
        if (allocIpCount > 0) {
            if (isAccountSpecific) { 
                try {
                    vlan = _vlanDao.acquireInLockTable(vlanDbId, 30);
                    if (vlan == null) {
                        throw new CloudRuntimeException("Unable to acquire vlan configuration: " + vlanDbId);
                    }
                    
                    if (s_logger.isDebugEnabled()) {
                        s_logger.debug("lock vlan " + vlanDbId + " is acquired");
                    }
                    
                    List<IPAddressVO> ips = _publicIpAddressDao.listByVlanId(vlanDbId);
                    
                    for (IPAddressVO ip : ips) {
                        if (ip.isOneToOneNat()) {
                            throw new InvalidParameterValueException("Can't delete account specific vlan " + vlanDbId + 
                                    " as ip " + ip + " belonging to the range is used for static nat purposes. Cleanup the rules first");
                        }
                        
                        if (ip.isSourceNat() && _networkModel.getNetwork(ip.getAssociatedWithNetworkId()) != null) {
                            throw new InvalidParameterValueException("Can't delete account specific vlan " + vlanDbId + 
                                    " as ip " + ip + " belonging to the range is a source nat ip for the network id=" + ip.getSourceNetworkId() + 
                                    ". IP range with the source nat ip address can be removed either as a part of Network, or account removal");
                        }
                        
                        if (_firewallDao.countRulesByIpId(ip.getId()) > 0) {
                            throw new InvalidParameterValueException("Can't delete account specific vlan " + vlanDbId + 
                                    " as ip " + ip + " belonging to the range has firewall rules applied. Cleanup the rules first");
                        }
                        //release public ip address here
                        success = success && _networkMgr.disassociatePublicIpAddress(ip.getId(), userId, caller);
                    }
                    if (!success) {
                        s_logger.warn("Some ip addresses failed to be released as a part of vlan " + vlanDbId + " removal");
                    }
                } finally {
                    _vlanDao.releaseFromLockTable(vlanDbId);
                } 
            } else {
                throw new InvalidParameterValueException("The IP range can't be deleted because it has allocated public IP addresses.");
            }
        }

        if (success) {
            // Delete all public IPs in the VLAN
            if (!deletePublicIPRange(vlanDbId)) {
                return false;
            }

            // Delete the VLAN
            return _vlanDao.expunge(vlanDbId);
        } else {
            return false;
        }
    }

    @Override
    public List<String> csvTagsToList(String tags) {
        List<String> tagsList = new ArrayList<String>();

        if (tags != null) {
            String[] tokens = tags.split(",");
            for (int i = 0; i < tokens.length; i++) {
                tagsList.add(tokens[i].trim());
            }
        }

        return tagsList;
    }

    @Override
    public String listToCsvTags(List<String> tagsList) {
        String tags = "";
        if (tagsList.size() > 0) {
            for (int i = 0; i < tagsList.size(); i++) {
                tags += tagsList.get(i);
                if (i != tagsList.size() - 1) {
                    tags += ",";
                }
            }
        }

        return tags;
    }

    @Override
    public String cleanupTags(String tags) {
        if (tags != null) {
            String[] tokens = tags.split(",");
            StringBuilder t = new StringBuilder();
            for (int i = 0; i < tokens.length; i++) {
                t.append(tokens[i].trim()).append(",");
            }
            t.delete(t.length() - 1, t.length());
            tags = t.toString();
        }

        return tags;
    }

    @DB
    protected boolean deletePublicIPRange(long vlanDbId) {
        Transaction txn = Transaction.currentTxn();
        String deleteSql = "DELETE FROM `cloud`.`user_ip_address` WHERE vlan_db_id = ?";

        txn.start();
        try {
            PreparedStatement stmt = txn.prepareAutoCloseStatement(deleteSql);
            stmt.setLong(1, vlanDbId);
            stmt.executeUpdate();
        } catch (Exception ex) {
            return false;
        }
        txn.commit();

        return true;
    }
    

    @DB
    protected boolean savePublicIPRange(String startIP, String endIP, long zoneId, long vlanDbId, long sourceNetworkid, long physicalNetworkId) {
        long startIPLong = NetUtils.ip2Long(startIP);
        long endIPLong = NetUtils.ip2Long(endIP);
        Transaction txn = Transaction.currentTxn();
        txn.start();
        IPRangeConfig config = new IPRangeConfig();
        List<String> problemIps = config.savePublicIPRange(txn, startIPLong, endIPLong, zoneId, vlanDbId, sourceNetworkid, physicalNetworkId);
        txn.commit();
        return problemIps != null && problemIps.size() == 0;
    }

    private void checkPublicIpRangeErrors(long zoneId, String vlanId, String vlanGateway, String vlanNetmask, String startIP, String endIP) {
        // Check that the start and end IPs are valid
        if (!NetUtils.isValidIp(startIP)) {
            throw new InvalidParameterValueException("Please specify a valid start IP");
        }

        if (endIP != null && !NetUtils.isValidIp(endIP)) {
            throw new InvalidParameterValueException("Please specify a valid end IP");
        }

        if (endIP != null && !NetUtils.validIpRange(startIP, endIP)) {
            throw new InvalidParameterValueException("Please specify a valid IP range.");
        }

        // Check that the IPs that are being added are compatible with the
        // VLAN's gateway and netmask
        if (vlanNetmask == null) {
            throw new InvalidParameterValueException("Please ensure that your IP range's netmask is specified");
        }

        if (endIP != null && !NetUtils.sameSubnet(startIP, endIP, vlanNetmask)) {
            throw new InvalidParameterValueException("Please ensure that your start IP and end IP are in the same subnet, as per the IP range's netmask.");
        }

        if (!NetUtils.sameSubnet(startIP, vlanGateway, vlanNetmask)) {
            throw new InvalidParameterValueException("Please ensure that your start IP is in the same subnet as your IP range's gateway, as per the IP range's netmask.");
        }

        if (endIP != null && !NetUtils.sameSubnet(endIP, vlanGateway, vlanNetmask)) {
            throw new InvalidParameterValueException("Please ensure that your end IP is in the same subnet as your IP range's gateway, as per the IP range's netmask.");
        }
    }

    private void checkPrivateIpRangeErrors(Long podId, String startIP, String endIP) {
        HostPodVO pod = _podDao.findById(podId);
        if (pod == null) {
            throw new InvalidParameterValueException("Please specify a valid pod.");
        }

        // Check that the start and end IPs are valid
        if (!NetUtils.isValidIp(startIP)) {
            throw new InvalidParameterValueException("Please specify a valid start IP");
        }

        if (endIP != null && !NetUtils.isValidIp(endIP)) {
            throw new InvalidParameterValueException("Please specify a valid end IP");
        }

        if (endIP != null && !NetUtils.validIpRange(startIP, endIP)) {
            throw new InvalidParameterValueException("Please specify a valid IP range.");
        }

        // Check that the IPs that are being added are compatible with the pod's
        // CIDR
        String cidrAddress = getCidrAddress(podId);
        long cidrSize = getCidrSize(podId);

        if (endIP != null && !NetUtils.sameSubnetCIDR(startIP, endIP, cidrSize)) {
            throw new InvalidParameterValueException("Please ensure that your start IP and end IP are in the same subnet, as per the pod's CIDR size.");
        }

        if (!NetUtils.sameSubnetCIDR(startIP, cidrAddress, cidrSize)) {
            throw new InvalidParameterValueException("Please ensure that your start IP is in the same subnet as the pod's CIDR address.");
        }

        if (endIP != null && !NetUtils.sameSubnetCIDR(endIP, cidrAddress, cidrSize)) {
            throw new InvalidParameterValueException("Please ensure that your end IP is in the same subnet as the pod's CIDR address.");
        }
    }

    private String getCidrAddress(String cidr) {
        String[] cidrPair = cidr.split("\\/");
        return cidrPair[0];
    }

    private int getCidrSize(String cidr) {
        String[] cidrPair = cidr.split("\\/");
        return Integer.parseInt(cidrPair[1]);
    }

    private String getCidrAddress(long podId) {
        HostPodVO pod = _podDao.findById(podId);
        return pod.getCidrAddress();
    }

    private long getCidrSize(long podId) {
        HostPodVO pod = _podDao.findById(podId);
        return pod.getCidrSize();
    }

    @Override
    public void checkPodCidrSubnets(long dcId, Long podIdToBeSkipped, String cidr) {
        // For each pod, return an error if any of the following is true:
        // The pod's CIDR subnet conflicts with the CIDR subnet of any other pod

        // Check if the CIDR conflicts with the Guest Network or other pods
        long skipPod = 0;
        if (podIdToBeSkipped != null) {
            skipPod = podIdToBeSkipped;
        }
        HashMap<Long, List<Object>> currentPodCidrSubnets = _podDao.getCurrentPodCidrSubnets(dcId, skipPod);
        List<Object> newCidrPair = new ArrayList<Object>();
        newCidrPair.add(0, getCidrAddress(cidr));
        newCidrPair.add(1, (long) getCidrSize(cidr));
        currentPodCidrSubnets.put(new Long(-1), newCidrPair);

        DataCenterVO dcVo = _zoneDao.findById(dcId);
        String guestNetworkCidr = dcVo.getGuestNetworkCidr();

        // Guest cidr can be null for Basic zone
        String guestIpNetwork = null;
        Long guestCidrSize = null;
        if (guestNetworkCidr != null) {
            String[] cidrTuple = guestNetworkCidr.split("\\/");
            guestIpNetwork = NetUtils.getIpRangeStartIpFromCidr(cidrTuple[0], Long.parseLong(cidrTuple[1]));
            guestCidrSize = Long.parseLong(cidrTuple[1]);
        }

        String zoneName = getZoneName(dcId);

        // Iterate through all pods in this zone
        for (Long podId : currentPodCidrSubnets.keySet()) {
            String podName;
            if (podId.longValue() == -1) {
                podName = "newPod";
            } else {
                podName = getPodName(podId.longValue());
            }

            List<Object> cidrPair = currentPodCidrSubnets.get(podId);
            String cidrAddress = (String) cidrPair.get(0);
            long cidrSize = ((Long) cidrPair.get(1)).longValue();

            long cidrSizeToUse = -1;
            if (guestCidrSize == null || cidrSize < guestCidrSize) {
                cidrSizeToUse = cidrSize;
            } else {
                cidrSizeToUse = guestCidrSize;
            }

            String cidrSubnet = NetUtils.getCidrSubNet(cidrAddress, cidrSizeToUse);

            if (guestNetworkCidr != null) {
                String guestSubnet = NetUtils.getCidrSubNet(guestIpNetwork, cidrSizeToUse);
                // Check that cidrSubnet does not equal guestSubnet
                if (cidrSubnet.equals(guestSubnet)) {
                    if (podName.equals("newPod")) {
                        throw new InvalidParameterValueException("The subnet of the pod you are adding conflicts with the subnet of the Guest IP Network. Please specify a different CIDR.");
                    } else {
                        throw new InvalidParameterValueException("Warning: The subnet of pod " + podName + " in zone " + zoneName
                                + " conflicts with the subnet of the Guest IP Network. Please change either the pod's CIDR or the Guest IP Network's subnet, and re-run install-vmops-management.");
                    }
                }
            }

            // Iterate through the rest of the pods
            for (Long otherPodId : currentPodCidrSubnets.keySet()) {
                if (podId.equals(otherPodId)) {
                    continue;
                }

                // Check that cidrSubnet does not equal otherCidrSubnet
                List<Object> otherCidrPair = currentPodCidrSubnets.get(otherPodId);
                String otherCidrAddress = (String) otherCidrPair.get(0);
                long otherCidrSize = ((Long) otherCidrPair.get(1)).longValue();

                if (cidrSize < otherCidrSize) {
                    cidrSizeToUse = cidrSize;
                } else {
                    cidrSizeToUse = otherCidrSize;
                }

                cidrSubnet = NetUtils.getCidrSubNet(cidrAddress, cidrSizeToUse);
                String otherCidrSubnet = NetUtils.getCidrSubNet(otherCidrAddress, cidrSizeToUse);

                if (cidrSubnet.equals(otherCidrSubnet)) {
                    String otherPodName = getPodName(otherPodId.longValue());
                    if (podName.equals("newPod")) {
                        throw new InvalidParameterValueException("The subnet of the pod you are adding conflicts with the subnet of pod " + otherPodName + " in zone " + zoneName
                                + ". Please specify a different CIDR.");
                    } else {
                        throw new InvalidParameterValueException("Warning: The pods " + podName + " and " + otherPodName + " in zone " + zoneName
                                + " have conflicting CIDR subnets. Please change the CIDR of one of these pods.");
                    }
                }
            }
        }

    }
    
    private boolean validPod(long podId) {
        return (_podDao.findById(podId) != null);
    }

    private boolean validPod(String podName, long zoneId) {
        if (!validZone(zoneId)) {
            return false;
        }

        return (_podDao.findByName(podName, zoneId) != null);
    }

    private String getPodName(long podId) {
        return _podDao.findById(new Long(podId)).getName();
    }

    private boolean validZone(String zoneName) {
        return (_zoneDao.findByName(zoneName) != null);
    }

    private boolean validZone(long zoneId) {
        return (_zoneDao.findById(zoneId) != null);
    }

    private String getZoneName(long zoneId) {
        DataCenterVO zone = _zoneDao.findById(new Long(zoneId));
        if (zone != null) {
            return zone.getName();
        } else {
            return null;
        }
    }

    private String[] getLinkLocalIPRange() {
        String ipNums = _configDao.getValue("linkLocalIp.nums");
        int nums = Integer.parseInt(ipNums);
        if (nums > 16 || nums <= 0) {
            throw new InvalidParameterValueException("The linkLocalIp.nums: " + nums + "is wrong, should be 1~16");
        }
        /* local link ip address starts from 169.254.0.2 - 169.254.(nums) */
        String[] ipRanges = NetUtils.getLinkLocalIPRange(nums);
        if (ipRanges == null) {
            throw new InvalidParameterValueException("The linkLocalIp.nums: " + nums + "may be wrong, should be 1~16");
        }
        return ipRanges;
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_VLAN_IP_RANGE_DELETE, eventDescription = "deleting vlan ip range", async = false)
    public boolean deleteVlanIpRange(DeleteVlanIpRangeCmd cmd) {
        Long vlanDbId = cmd.getId();

        VlanVO vlan = _vlanDao.findById(vlanDbId);
        if (vlan == null) {
            throw new InvalidParameterValueException("Please specify a valid IP range id.");
        }

        return deleteVlanAndPublicIpRange(UserContext.current().getCallerUserId(), vlanDbId, UserContext.current().getCaller());
    }

    @Override
    public void checkDiskOfferingAccess(Account caller, DiskOffering dof){
        for (SecurityChecker checker : _secChecker) {
            if (checker.checkAccess(caller, dof)) {
                if (s_logger.isDebugEnabled()) {
                    s_logger.debug("Access granted to " + caller + " to disk offering:" + dof.getId() + " by " + checker.getName());
                }
                return;
            } else {
                throw new PermissionDeniedException("Access denied to " + caller + " by " + checker.getName());
            }
        }

        assert false : "How can all of the security checkers pass on checking this caller?";
        throw new PermissionDeniedException("There's no way to confirm " + caller + " has access to disk offering:" + dof.getId());
    }

    @Override
    public void checkZoneAccess(Account caller, DataCenter zone){
        for (SecurityChecker checker : _secChecker) {
            if (checker.checkAccess(caller, zone)) {
                if (s_logger.isDebugEnabled()) {
                    s_logger.debug("Access granted to " + caller + " to zone:" + zone.getId() + " by " + checker.getName());
                }
                return;
            } else {
                throw new PermissionDeniedException("Access denied to " + caller + " by " + checker.getName() + " for zone " + zone.getId());
            }
        }

        assert false : "How can all of the security checkers pass on checking this caller?";
        throw new PermissionDeniedException("There's no way to confirm " + caller + " has access to zone:" + zone.getId());
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NETWORK_OFFERING_CREATE, eventDescription = "creating network offering")
    public NetworkOffering createNetworkOffering(CreateNetworkOfferingCmd cmd) {
        String name = cmd.getNetworkOfferingName();
        String displayText = cmd.getDisplayText();
        String tags = cmd.getTags();
        String trafficTypeString = cmd.getTraffictype();
        boolean specifyVlan = cmd.getSpecifyVlan();
        boolean conserveMode = cmd.getConserveMode();
        String availabilityStr = cmd.getAvailability();
        Integer networkRate = cmd.getNetworkRate();
        TrafficType trafficType = null;
        Availability availability = null;
        Network.GuestType guestType = null;
        boolean specifyIpRanges = cmd.getSpecifyIpRanges();

        // Verify traffic type
        for (TrafficType tType : TrafficType.values()) {
            if (tType.name().equalsIgnoreCase(trafficTypeString)) {
                trafficType = tType;
                break;
            }
        }
        if (trafficType == null) {
            throw new InvalidParameterValueException("Invalid value for traffictype. Supported traffic types: Public, Management, Control, Guest, Vlan or Storage");
        }

        // Only GUEST traffic type is supported in Acton
        if (trafficType != TrafficType.Guest) {
            throw new InvalidParameterValueException("Only traffic type " + TrafficType.Guest + " is supported in the current release");
        }

        // Verify offering type
        for (Network.GuestType offType : Network.GuestType.values()) {
            if (offType.name().equalsIgnoreCase(cmd.getGuestIpType())) {
                guestType = offType;
                break;
            }
        }

        if (guestType == null) {
            throw new InvalidParameterValueException("Invalid \"type\" parameter is given; can have Shared and Isolated values");
        }

        // Verify availability
        for (Availability avlb : Availability.values()) {
            if (avlb.name().equalsIgnoreCase(availabilityStr)) {
                availability = avlb;
            }
        }

        if (availability == null) {
            throw new InvalidParameterValueException("Invalid value for Availability. Supported types: " + Availability.Required + ", " + Availability.Optional);
        }

        Long serviceOfferingId = cmd.getServiceOfferingId();

        if (serviceOfferingId != null) {
            ServiceOfferingVO offering = _serviceOfferingDao.findById(serviceOfferingId);
            if (offering == null) {
                throw new InvalidParameterValueException("Cannot find specified service offering: " + serviceOfferingId);
            }
            if (!VirtualMachine.Type.DomainRouter.toString().equalsIgnoreCase(offering.getSystemVmType())) {
                throw new InvalidParameterValueException("The specified service offering " + serviceOfferingId + " cannot be used by virtual router!");
            }
        }

        // configure service provider map
        Map<Network.Service, Set<Network.Provider>> serviceProviderMap = new HashMap<Network.Service, Set<Network.Provider>>();
        Set<Network.Provider> defaultProviders = new HashSet<Network.Provider>();

        // populate the services first
        for (String serviceName : cmd.getSupportedServices()) {
            // validate if the service is supported
            Service service = Network.Service.getService(serviceName);
            if (service == null || service == Service.Gateway) {
                throw new InvalidParameterValueException("Invalid service " + serviceName);
            }

            if (service == Service.SecurityGroup) {
                // allow security group service for Shared networks only
                if (guestType != GuestType.Shared) {
                    throw new InvalidParameterValueException("Secrity group service is supported for network offerings with guest ip type " + GuestType.Shared);
                }
                Set<Network.Provider> sgProviders = new HashSet<Network.Provider>();
                sgProviders.add(Provider.SecurityGroupProvider);
                serviceProviderMap.put(Network.Service.SecurityGroup, sgProviders);
                continue;
            }
            serviceProviderMap.put(service, defaultProviders);
        }

        // add gateway provider (if sourceNat provider is enabled)
        Set<Provider> sourceNatServiceProviders = serviceProviderMap.get(Service.SourceNat);
        if (sourceNatServiceProviders != null && !sourceNatServiceProviders.isEmpty()) {
            serviceProviderMap.put(Service.Gateway, sourceNatServiceProviders);
        }

        // populate providers
        Map<Provider, Set<Service>> providerCombinationToVerify = new HashMap<Provider, Set<Service>>();
        Map<String, List<String>> svcPrv = cmd.getServiceProviders();
        Provider firewallProvider = null;
        if (svcPrv != null) {
            for (String serviceStr : svcPrv.keySet()) {
                Network.Service service = Network.Service.getService(serviceStr);
                if (serviceProviderMap.containsKey(service)) {
                    Set<Provider> providers = new HashSet<Provider>();
                    // in Acton, don't allow to specify more than 1 provider per service
                    if (svcPrv.get(serviceStr) != null && svcPrv.get(serviceStr).size() > 1) {
                        throw new InvalidParameterValueException("In the current release only one provider can be " +
                        		"specified for the service");
                    }
                    for (String prvNameStr : svcPrv.get(serviceStr)) {
                        // check if provider is supported
                        Network.Provider provider = Network.Provider.getProvider(prvNameStr);
                        if (provider == null) {
                            throw new InvalidParameterValueException("Invalid service provider: " + prvNameStr);
                        }

                        if (provider == Provider.JuniperSRX) {
                            firewallProvider = Provider.JuniperSRX;
                        }
                        
                        if ((service == Service.PortForwarding || service == Service.StaticNat) && provider == Provider.VirtualRouter){
                            firewallProvider = Provider.VirtualRouter;
                        }

                        providers.add(provider);

                        Set<Service> serviceSet = null;
                        if (providerCombinationToVerify.get(provider) == null) {
                            serviceSet = new HashSet<Service>();
                        } else {
                            serviceSet = providerCombinationToVerify.get(provider);
                        }
                        serviceSet.add(service);
                        providerCombinationToVerify.put(provider, serviceSet);

                    }
                    serviceProviderMap.put(service, providers);
                } else {
                    throw new InvalidParameterValueException("Service " + serviceStr + " is not enabled for the network " +
                    		"offering, can't add a provider to it");
                }
            }
        }

        // validate providers combination here
        _networkModel.canProviderSupportServices(providerCombinationToVerify);

        // validate the LB service capabilities specified in the network offering
        Map<Capability, String> lbServiceCapabilityMap = cmd.getServiceCapabilities(Service.Lb);
        if (!serviceProviderMap.containsKey(Service.Lb) && lbServiceCapabilityMap != null && !lbServiceCapabilityMap.isEmpty()) {
            throw new InvalidParameterValueException("Capabilities for LB service can be specifed only when LB service is enabled for network offering.");
        }
        validateLoadBalancerServiceCapabilities(lbServiceCapabilityMap);

        // validate the Source NAT service capabilities specified in the network offering
        Map<Capability, String> sourceNatServiceCapabilityMap = cmd.getServiceCapabilities(Service.SourceNat);
        if (!serviceProviderMap.containsKey(Service.SourceNat) && sourceNatServiceCapabilityMap != null && !sourceNatServiceCapabilityMap.isEmpty()) {
            throw new InvalidParameterValueException("Capabilities for source NAT service can be specifed only when source NAT service is enabled for network offering.");
        }
        validateSourceNatServiceCapablities(sourceNatServiceCapabilityMap);

        // validate the Static Nat service capabilities specified in the network offering
        Map<Capability, String> staticNatServiceCapabilityMap = cmd.getServiceCapabilities(Service.StaticNat);
        if (!serviceProviderMap.containsKey(Service.StaticNat) && sourceNatServiceCapabilityMap != null && !staticNatServiceCapabilityMap.isEmpty()) {
            throw new InvalidParameterValueException("Capabilities for static NAT service can be specifed only when static NAT service is enabled for network offering.");
        }
        validateStaticNatServiceCapablities(staticNatServiceCapabilityMap);

        Map<Service, Map<Capability, String>> serviceCapabilityMap = new HashMap<Service, Map<Capability, String>>();
        serviceCapabilityMap.put(Service.Lb, lbServiceCapabilityMap);
        serviceCapabilityMap.put(Service.SourceNat, sourceNatServiceCapabilityMap);
        serviceCapabilityMap.put(Service.StaticNat, staticNatServiceCapabilityMap);

        // if Firewall service is missing, add Firewall service/provider combination
        if (firewallProvider != null) {
            s_logger.debug("Adding Firewall service with provider " + firewallProvider.getName());
            Set<Provider> firewallProviderSet = new HashSet<Provider>();
            firewallProviderSet.add(firewallProvider);
            serviceProviderMap.put(Service.Firewall, firewallProviderSet);
        }

        return createNetworkOffering(name, displayText, trafficType, tags, specifyVlan, availability, networkRate, serviceProviderMap, false, guestType, false,
                serviceOfferingId, conserveMode, serviceCapabilityMap, specifyIpRanges);
    }

    void validateLoadBalancerServiceCapabilities(Map<Capability, String> lbServiceCapabilityMap) {
        if (lbServiceCapabilityMap != null && !lbServiceCapabilityMap.isEmpty()) {
            if (lbServiceCapabilityMap.keySet().size() > 3 || !lbServiceCapabilityMap.containsKey(Capability.SupportedLBIsolation)) {
                throw new InvalidParameterValueException("Only " + Capability.SupportedLBIsolation.getName() + ", " + Capability.ElasticLb.getName() + ", " + Capability.InlineMode.getName() + " capabilities can be sepcified for LB service");
            }

            for (Capability cap : lbServiceCapabilityMap.keySet()) {
                String value = lbServiceCapabilityMap.get(cap);
                if (cap == Capability.SupportedLBIsolation) {
                    boolean dedicatedLb = value.contains("dedicated");
                    boolean sharedLB = value.contains("shared");
                    if ((dedicatedLb && sharedLB) || (!dedicatedLb && !sharedLB)) {
                        throw new InvalidParameterValueException("Either dedicated or shared isolation can be specified for " + Capability.SupportedLBIsolation.getName());
                    }
                } else if (cap == Capability.ElasticLb) {
                    boolean enabled = value.contains("true");
                    boolean disabled = value.contains("false");
                    if (!enabled && !disabled) {
                        throw new InvalidParameterValueException("Unknown specified value for " + Capability.ElasticLb.getName());
                    }
                } else if (cap == Capability.InlineMode) {
                    boolean enabled = value.contains("true");
                    boolean disabled = value.contains("false");
                    if (!enabled && !disabled) {
                        throw new InvalidParameterValueException("Unknown specified value for " + Capability.InlineMode.getName());
                    }
                } else {
                    throw new InvalidParameterValueException("Only " + Capability.SupportedLBIsolation.getName() + ", " + Capability.ElasticLb.getName() + ", " + Capability.InlineMode.getName() + " capabilities can be sepcified for LB service");
                }
            }
        }
    }

    void validateSourceNatServiceCapablities(Map<Capability, String> sourceNatServiceCapabilityMap) {
        if (sourceNatServiceCapabilityMap != null && !sourceNatServiceCapabilityMap.isEmpty()) {
            if (sourceNatServiceCapabilityMap.keySet().size() > 2) {
                throw new InvalidParameterValueException("Only " + Capability.SupportedSourceNatTypes.getName() + " and " + Capability.RedundantRouter + " capabilities can be sepcified for source nat service");
            }

            for (Capability capability : sourceNatServiceCapabilityMap.keySet()) {
                String value = sourceNatServiceCapabilityMap.get(capability);
                if (capability == Capability.SupportedSourceNatTypes) {
                    boolean perAccount = value.contains("peraccount");
                    boolean perZone = value.contains("perzone");
                    if ((perAccount && perZone) || (!perAccount && !perZone)) {
                        throw new InvalidParameterValueException("Either peraccount or perzone source NAT type can be specified for " + Capability.SupportedSourceNatTypes.getName());
                    }
                } else if (capability == Capability.RedundantRouter) {
                    boolean enabled = value.contains("true");
                    boolean disabled = value.contains("false");
                    if (!enabled && !disabled) {
                        throw new InvalidParameterValueException("Unknown specified value for " + Capability.RedundantRouter.getName());
                    }
                } else {
                    throw new InvalidParameterValueException("Only " + Capability.SupportedSourceNatTypes.getName() + " and " + Capability.RedundantRouter + " capabilities can be sepcified for source nat service");
                }
            }
        }
    }

    void validateStaticNatServiceCapablities(Map<Capability, String> staticNatServiceCapabilityMap) {
        if (staticNatServiceCapabilityMap != null && !staticNatServiceCapabilityMap.isEmpty()) {
            if (staticNatServiceCapabilityMap.keySet().size() > 1) {
                throw new InvalidParameterValueException("Only " + Capability.ElasticIp.getName() +  " capability can be specified for static nat service");
            }

            for (Capability capability : staticNatServiceCapabilityMap.keySet()) {
                String value = staticNatServiceCapabilityMap.get(capability);
                if (capability == Capability.ElasticIp) {
                    boolean enabled = value.contains("true");
                    boolean disabled = value.contains("false");
                    if (!enabled && !disabled) {
                        throw new InvalidParameterValueException("Unknown specified value for " + Capability.ElasticIp.getName());
                    }
                } else {
                    throw new InvalidParameterValueException("Only " + Capability.ElasticIp.getName() + " capability can be specified for static nat service");
                }
            }
        }
    }

    @Override
    @DB
    public NetworkOfferingVO createNetworkOffering(String name, String displayText, TrafficType trafficType, String tags, boolean specifyVlan, Availability availability, Integer networkRate,
            Map<Service, Set<Provider>> serviceProviderMap, boolean isDefault, Network.GuestType type, boolean systemOnly, Long serviceOfferingId,
            boolean conserveMode, Map<Service, Map<Capability, String>> serviceCapabilityMap, boolean specifyIpRanges) {

        String multicastRateStr = _configDao.getValue("multicast.throttling.rate");
        int multicastRate = ((multicastRateStr == null) ? 10 : Integer.parseInt(multicastRateStr));
        tags = cleanupTags(tags);
        
        if (specifyVlan != specifyIpRanges) {
            throw new InvalidParameterValueException("SpecifyVlan should be equal to specifyIpRanges which is " + specifyIpRanges);
        }

        // specifyVlan should always be true for Shared network offerings
        if (!specifyVlan && type == GuestType.Shared) {
            throw new InvalidParameterValueException("SpecifyVlan should be true if network offering's type is " + type);
        }
        
        //specifyIpRanges should always be false for Isolated offering with Source nat service enabled
        if (specifyVlan && type == GuestType.Isolated && serviceProviderMap.containsKey(Service.SourceNat)) {
            throw new InvalidParameterValueException("SpecifyVlan should be false if the network offering type is " 
                                                        + type + " and service " + Service.SourceNat.getName() + " is supported");
        }

        // validate availability value
        if (availability == NetworkOffering.Availability.Required) {
            boolean canOffBeRequired = (type == GuestType.Isolated && serviceProviderMap.containsKey(Service.SourceNat));
            if (!canOffBeRequired) {
                throw new InvalidParameterValueException("Availability can be " + NetworkOffering.Availability.Required 
                        + " only for networkOfferings of type " + GuestType.Isolated + " and with "
                        + Service.SourceNat.getName() + " enabled");
            }

            // only one network offering in the system can be Required
            List<NetworkOfferingVO> offerings = _networkOfferingDao.listByAvailability(Availability.Required, false);
            if (!offerings.isEmpty()) {
                throw new InvalidParameterValueException("System already has network offering id=" + offerings.get(0).getId() 
                        + " with availability " + Availability.Required);
            }
        }

        
        boolean dedicatedLb = false;
        boolean elasticLb = false;
        boolean sharedSourceNat = false;
        boolean redundantRouter = false;
        boolean elasticIp = false;
        boolean inline = false;
        if (serviceCapabilityMap != null && !serviceCapabilityMap.isEmpty()) {
            Map<Capability, String> lbServiceCapabilityMap = serviceCapabilityMap.get(Service.Lb);
            
            if ((lbServiceCapabilityMap != null) && (!lbServiceCapabilityMap.isEmpty())) {
                String isolationCapability = lbServiceCapabilityMap.get(Capability.SupportedLBIsolation);
                if (isolationCapability != null) {
                    _networkModel.checkCapabilityForProvider(serviceProviderMap.get(Service.Lb), Service.Lb, Capability.SupportedLBIsolation, isolationCapability);
                    dedicatedLb = isolationCapability.contains("dedicated");
                } else {
                    dedicatedLb = true;
                }

                String param = lbServiceCapabilityMap.get(Capability.ElasticLb);
                if (param != null) {
                    elasticLb = param.contains("true");
                }
                
                String inlineMode = lbServiceCapabilityMap.get(Capability.InlineMode);
                if (inlineMode != null) {
                    _networkModel.checkCapabilityForProvider(serviceProviderMap.get(Service.Lb), Service.Lb, Capability.InlineMode, inlineMode);
                    inline = inlineMode.contains("true");
                } else {
                    inline = false;
                }
            }

            Map<Capability, String> sourceNatServiceCapabilityMap = serviceCapabilityMap.get(Service.SourceNat);
            if ((sourceNatServiceCapabilityMap != null) && (!sourceNatServiceCapabilityMap.isEmpty())) {
                String sourceNatType = sourceNatServiceCapabilityMap.get(Capability.SupportedSourceNatTypes);
                if (sourceNatType != null) {
                    _networkModel.checkCapabilityForProvider(serviceProviderMap.get(Service.SourceNat), Service.SourceNat, 
                            Capability.SupportedSourceNatTypes, sourceNatType);
                    sharedSourceNat = sourceNatType.contains("perzone");
                }

                String param = sourceNatServiceCapabilityMap.get(Capability.RedundantRouter);
                if (param != null) {
                    _networkModel.checkCapabilityForProvider(serviceProviderMap.get(Service.SourceNat), Service.SourceNat, 
                            Capability.RedundantRouter, param);
                    redundantRouter = param.contains("true");
                }
            }

            Map<Capability, String> staticNatServiceCapabilityMap = serviceCapabilityMap.get(Service.StaticNat);
            if ((staticNatServiceCapabilityMap != null) && (!staticNatServiceCapabilityMap.isEmpty())) {
                String param = staticNatServiceCapabilityMap.get(Capability.ElasticIp);
                if (param != null) {
                    elasticIp = param.contains("true");
                }
            }
        }

        NetworkOfferingVO offering = new NetworkOfferingVO(name, displayText, trafficType, systemOnly, specifyVlan, 
                networkRate, multicastRate, isDefault, availability, tags, type, conserveMode, dedicatedLb,
                sharedSourceNat, redundantRouter, elasticIp, elasticLb, specifyIpRanges, inline);

        if (serviceOfferingId != null) {
            offering.setServiceOfferingId(serviceOfferingId);
        }

        Transaction txn = Transaction.currentTxn();
        txn.start();
        // create network offering object
        s_logger.debug("Adding network offering " + offering);
        offering = _networkOfferingDao.persist(offering);
        // populate services and providers
        if (serviceProviderMap != null) {
            for (Network.Service service : serviceProviderMap.keySet()) {
                Set<Provider> providers = serviceProviderMap.get(service);
                if (providers != null && !providers.isEmpty()) {
                    boolean vpcOff = false;
                    for (Network.Provider provider : providers) {
                        if (provider == Provider.VPCVirtualRouter) {
                            vpcOff = true;
                        }
                        NetworkOfferingServiceMapVO offService = new NetworkOfferingServiceMapVO(offering.getId(), service, provider);
                        _ntwkOffServiceMapDao.persist(offService);
                        s_logger.trace("Added service for the network offering: " + offService + " with provider " + provider.getName());
                    }
                    
                    if (vpcOff) {
                        List<Service> supportedSvcs = new ArrayList<Service>();
                        supportedSvcs.addAll(serviceProviderMap.keySet());
                        _vpcMgr.validateNtwkOffForVpc(offering, supportedSvcs);
                    }
                } else {
                    NetworkOfferingServiceMapVO offService = new NetworkOfferingServiceMapVO(offering.getId(), service, null);
                    _ntwkOffServiceMapDao.persist(offService);
                    s_logger.trace("Added service for the network offering: " + offService + " with null provider");
                }
            }
        }

        txn.commit();

        UserContext.current().setEventDetails(" Id: " + offering.getId() + " Name: " + name);
        return offering;
    }

    @Override
    public List<? extends NetworkOffering> searchForNetworkOfferings(ListNetworkOfferingsCmd cmd) {
        Boolean isAscending = Boolean.parseBoolean(_configDao.getValue("sortkey.algorithm"));
        isAscending = (isAscending == null ? true : isAscending);
        Filter searchFilter = new Filter(NetworkOfferingVO.class, "sortKey", isAscending, cmd.getStartIndex(), cmd.getPageSizeVal());
        Account caller = UserContext.current().getCaller();
        SearchCriteria<NetworkOfferingVO> sc = _networkOfferingDao.createSearchCriteria();

        Long id = cmd.getId();
        Object name = cmd.getNetworkOfferingName();
        Object displayText = cmd.getDisplayText();
        Object trafficType = cmd.getTrafficType();
        Object isDefault = cmd.getIsDefault();
        Object specifyVlan = cmd.getSpecifyVlan();
        Object availability = cmd.getAvailability();
        Object state = cmd.getState();
        Long zoneId = cmd.getZoneId();
        DataCenter zone = null;
        Long networkId = cmd.getNetworkId();
        String guestIpType = cmd.getGuestIpType();
        List<String> supportedServicesStr = cmd.getSupportedServices();
        Object specifyIpRanges = cmd.getSpecifyIpRanges();
        String tags = cmd.getTags();
        Boolean isTagged = cmd.isTagged();
        Boolean forVpc = cmd.getForVpc();

        if (zoneId != null) {
            zone = getZone(zoneId);
            if (zone == null) {
                throw new InvalidParameterValueException("Unable to find the zone by id=" + zoneId);
            }
        }

        Object keyword = cmd.getKeyword();

        if (keyword != null) {
            SearchCriteria<NetworkOfferingVO> ssc = _networkOfferingDao.createSearchCriteria();
            ssc.addOr("displayText", SearchCriteria.Op.LIKE, "%" + keyword + "%");
            ssc.addOr("name", SearchCriteria.Op.LIKE, "%" + keyword + "%");

            sc.addAnd("name", SearchCriteria.Op.SC, ssc);
        }

        if (name != null) {
            sc.addAnd("name", SearchCriteria.Op.LIKE, "%" + name + "%");
        }

        if (guestIpType != null) {
            sc.addAnd("guestType", SearchCriteria.Op.EQ, guestIpType);
        }

        if (displayText != null) {
            sc.addAnd("displayText", SearchCriteria.Op.LIKE, "%" + displayText + "%");
        }

        if (trafficType != null) {
            sc.addAnd("trafficType", SearchCriteria.Op.EQ, trafficType);
        }

        if (isDefault != null) {
            sc.addAnd("isDefault", SearchCriteria.Op.EQ, isDefault);
        }

        if (specifyVlan != null) {
            sc.addAnd("specifyVlan", SearchCriteria.Op.EQ, specifyVlan);
        }

        if (availability != null) {
            sc.addAnd("availability", SearchCriteria.Op.EQ, availability);
        }

        if (state != null) {
            sc.addAnd("state", SearchCriteria.Op.EQ, state);
        }

        if (specifyIpRanges != null) {
            sc.addAnd("specifyIpRanges", SearchCriteria.Op.EQ, specifyIpRanges);
        }

        if (zone != null) {
            if (zone.getNetworkType() == NetworkType.Basic) {
                // return empty list as we don't allow to create networks in
                // basic zone, and shouldn't display networkOfferings
                return new ArrayList<NetworkOffering>();
            }
        }

        // Don't return system network offerings to the user
        sc.addAnd("systemOnly", SearchCriteria.Op.EQ, false);

        // if networkId is specified, list offerings available for upgrade only (for this network)
        Network network = null;
        if (networkId != null) {
            // check if network exists and the caller can operate with it
            network = _networkModel.getNetwork(networkId);
            if (network == null) {
                throw new InvalidParameterValueException("Unable to find the network by id=" + networkId);
            }
            // Don't allow to update system network
            NetworkOffering offering = _networkOfferingDao.findByIdIncludingRemoved(network.getNetworkOfferingId());
            if (offering.isSystemOnly()) {
                throw new InvalidParameterValueException("Can't update system networks");
            }

            _accountMgr.checkAccess(caller, null, true, network);

            List<Long> offeringIds = _networkModel.listNetworkOfferingsForUpgrade(networkId);

            if (!offeringIds.isEmpty()) {
                sc.addAnd("id", SearchCriteria.Op.IN, offeringIds.toArray());
            } else {
                return new ArrayList<NetworkOffering>();
            }
        }

        if (id != null) {
            sc.addAnd("id", SearchCriteria.Op.EQ, id);
        }

        if (tags != null) {
            sc.addAnd("tags", SearchCriteria.Op.EQ, tags);
        }

        if (isTagged != null) {
            if (isTagged) {
                sc.addAnd("tags", SearchCriteria.Op.NNULL);
            } else {
                sc.addAnd("tags", SearchCriteria.Op.NULL);
            }
        }

        List<NetworkOfferingVO> offerings = _networkOfferingDao.search(sc, searchFilter);
        Boolean sourceNatSupported = cmd.getSourceNatSupported();
        List<String> pNtwkTags = new ArrayList<String>();
        boolean checkForTags = false;
        if (zone != null) {
            List<PhysicalNetworkVO> pNtwks = _physicalNetworkDao.listByZoneAndTrafficType(zoneId, TrafficType.Guest);
            if (pNtwks.size() > 1) {
                checkForTags = true;
                // go through tags
                for (PhysicalNetworkVO pNtwk : pNtwks) {
                    List<String> pNtwkTag = pNtwk.getTags();
                    if (pNtwkTag == null || pNtwkTag.isEmpty()) {
                        throw new CloudRuntimeException("Tags are not defined for physical network in the zone id=" + zoneId);
                    }
                    pNtwkTags.addAll(pNtwkTag);
                }
            }
        }

        // filter by supported services
        boolean listBySupportedServices = (supportedServicesStr != null && !supportedServicesStr.isEmpty() && !offerings.isEmpty());
        boolean checkIfProvidersAreEnabled = (zoneId != null);
        boolean parseOfferings = (listBySupportedServices || sourceNatSupported != null || checkIfProvidersAreEnabled 
                || forVpc != null || network != null);

        if (parseOfferings) {
            List<NetworkOfferingVO> supportedOfferings = new ArrayList<NetworkOfferingVO>();
            Service[] supportedServices = null;

            if (listBySupportedServices) {
                supportedServices = new Service[supportedServicesStr.size()];
                int i = 0;
                for (String supportedServiceStr : supportedServicesStr) {
                    Service service = Service.getService(supportedServiceStr);
                    if (service == null) {
                        throw new InvalidParameterValueException("Invalid service specified " + supportedServiceStr);
                    } else {
                        supportedServices[i] = service;
                    }
                    i++;
                }
            }

            for (NetworkOfferingVO offering : offerings) {
                boolean addOffering = true;
                List<Service> checkForProviders = new ArrayList<Service>();

                if (checkForTags) {
                    if (!pNtwkTags.contains(offering.getTags())) {
                        continue;
                    }
                }

                if (listBySupportedServices) {
                    addOffering = addOffering && _networkModel.areServicesSupportedByNetworkOffering(offering.getId(), supportedServices);
                }

                if (checkIfProvidersAreEnabled) {
                    if (supportedServices != null && supportedServices.length > 0) {
                        checkForProviders = Arrays.asList(supportedServices);
                    } else {
                        checkForProviders = _networkModel.listNetworkOfferingServices(offering.getId());
                    }

                    addOffering = addOffering && _networkModel.areServicesEnabledInZone(zoneId, offering, checkForProviders);
                }

                if (sourceNatSupported != null) {
                    addOffering = addOffering && (_networkModel.areServicesSupportedByNetworkOffering(offering.getId(), Network.Service.SourceNat) == sourceNatSupported);
                }
                
                if (forVpc != null) {
                    addOffering = addOffering && (isOfferingForVpc(offering) == forVpc.booleanValue());
                } else if (network != null){
                    addOffering = addOffering && (isOfferingForVpc(offering) == (network.getVpcId() != null));
                }

                if (addOffering) {
                    supportedOfferings.add(offering);
                }

            }

            return supportedOfferings;
        } else {
            return offerings;
        }
    }

    @Override
    public boolean isOfferingForVpc(NetworkOffering offering) {
        boolean vpcProvider = _ntwkOffServiceMapDao.isProviderForNetworkOffering(offering.getId(),
                Provider.VPCVirtualRouter);
        return vpcProvider;
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NETWORK_OFFERING_DELETE, eventDescription = "deleting network offering")
    public boolean deleteNetworkOffering(DeleteNetworkOfferingCmd cmd) {
        Long offeringId = cmd.getId();
        UserContext.current().setEventDetails(" Id: " + offeringId);

        // Verify network offering id
        NetworkOfferingVO offering = _networkOfferingDao.findById(offeringId);
        if (offering == null) {
            throw new InvalidParameterValueException("unable to find network offering " + offeringId);
        } else if (offering.getRemoved() != null || offering.isSystemOnly()) {
            throw new InvalidParameterValueException("unable to find network offering " + offeringId);
        }

        // Don't allow to delete default network offerings
        if (offering.isDefault() == true) {
            throw new InvalidParameterValueException("Default network offering can't be deleted");
        }

        // don't allow to delete network offering if it's in use by existing networks (the offering can be disabled
        // though)
        int networkCount = _networkDao.getNetworkCountByNetworkOffId(offeringId);
        if (networkCount > 0) {
            throw new InvalidParameterValueException("Can't delete network offering " + offeringId + " as its used by " + networkCount + " networks. " +
                    "To make the network offering unavaiable, disable it");
        }

        if (_networkOfferingDao.remove(offeringId)) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NETWORK_OFFERING_EDIT, eventDescription = "updating network offering")
    public NetworkOffering updateNetworkOffering(UpdateNetworkOfferingCmd cmd) {
        String displayText = cmd.getDisplayText();
        Long id = cmd.getId();
        String name = cmd.getNetworkOfferingName();
        String availabilityStr = cmd.getAvailability();
        Integer sortKey = cmd.getSortKey();
        Availability availability = null;
        String state = cmd.getState();
        UserContext.current().setEventDetails(" Id: " + id);

        // Verify input parameters
        NetworkOfferingVO offeringToUpdate = _networkOfferingDao.findById(id);
        if (offeringToUpdate == null) {
            throw new InvalidParameterValueException("unable to find network offering " + id);
        }

        // Don't allow to update system network offering
        if (offeringToUpdate.isSystemOnly()) {
            throw new InvalidParameterValueException("Can't update system network offerings");
        }

        NetworkOfferingVO offering = _networkOfferingDao.createForUpdate(id);

        if (name != null) {
            offering.setName(name);
        }

        if (displayText != null) {
            offering.setDisplayText(displayText);
        }

        if (sortKey != null) {
            offering.setSortKey(sortKey);
        }

        if (state != null) {
            boolean validState = false;
            for (NetworkOffering.State st : NetworkOffering.State.values()) {
                if (st.name().equalsIgnoreCase(state)) {
                    validState = true;
                    offering.setState(st);
                }
            }
            if (!validState) {
                throw new InvalidParameterValueException("Incorrect state value: " + state);
            }
        }

        // Verify availability
        if (availabilityStr != null) {
            for (Availability avlb : Availability.values()) {
                if (avlb.name().equalsIgnoreCase(availabilityStr)) {
                    availability = avlb;
                }
            }
            if (availability == null) {
                throw new InvalidParameterValueException("Invalid value for Availability. Supported types: " 
            + Availability.Required + ", " + Availability.Optional);
            } else {
                if (availability == NetworkOffering.Availability.Required) {
                    boolean canOffBeRequired = (offeringToUpdate.getGuestType() == GuestType.Isolated 
                            && _networkModel.areServicesSupportedByNetworkOffering(offeringToUpdate.getId(), Service.SourceNat));
                    if (!canOffBeRequired) {
                        throw new InvalidParameterValueException("Availability can be " + 
                    NetworkOffering.Availability.Required + " only for networkOfferings of type " + GuestType.Isolated + " and with "
                                + Service.SourceNat.getName() + " enabled");
                    }

                    // only one network offering in the system can be Required
                    List<NetworkOfferingVO> offerings = _networkOfferingDao.listByAvailability(Availability.Required, false);
                    if (!offerings.isEmpty() && offerings.get(0).getId() != offeringToUpdate.getId()) {
                        throw new InvalidParameterValueException("System already has network offering id=" + 
                    offerings.get(0).getId() + " with availability " + Availability.Required);
                    }
                }
                offering.setAvailability(availability);
            }
        }

        if (_networkOfferingDao.update(id, offering)) {
            return _networkOfferingDao.findById(id);
        } else {
            return null;
        }
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_ACCOUNT_MARK_DEFAULT_ZONE, eventDescription = "Marking account with the " +
    		"default zone", async=true)
    public AccountVO markDefaultZone(String accountName, long domainId, long defaultZoneId) {
    	
    	// Check if the account exists
    	Account account = _accountDao.findEnabledAccount(accountName, domainId);
    	if (account == null) {
            s_logger.error("Unable to find account by name: " + accountName + " in domain " + domainId);
            throw new InvalidParameterValueException("Account by name: " + accountName + " doesn't exist in domain " + domainId);
        }

        // Don't allow modification of system account
        if (account.getId() == Account.ACCOUNT_ID_SYSTEM) {
            throw new InvalidParameterValueException("Can not modify system account");
    	}

    	AccountVO acctForUpdate = _accountDao.findById(account.getId());
    	
    	acctForUpdate.setDefaultZoneId(defaultZoneId);
    	
    	if (_accountDao.update(account.getId(), acctForUpdate)) {
    		UserContext.current().setEventDetails("Default zone id= " + defaultZoneId);
    		return _accountDao.findById(account.getId());
    	} else {
    		return null;
    	}
    }
    
    // Note: This method will be used for entity name validations in the coming
    // releases (place holder for now)
    private void validateEntityName(String str) {
        String forbidden = "~!@#$%^&*()+=";
        char[] searchChars = forbidden.toCharArray();
        if (str == null || str.length() == 0 || searchChars == null || searchChars.length == 0) {
            return;
        }
        for (int i = 0; i < str.length(); i++) {
            char ch = str.charAt(i);
            for (int j = 0; j < searchChars.length; j++) {
                if (searchChars[j] == ch) {
                    throw new InvalidParameterValueException("Name cannot contain any of the following special characters:" + forbidden);
                }
            }
        }
    }

    @Override
    public DataCenterVO getZone(long id) {
        return _zoneDao.findById(id);
    }

    @Override
    public NetworkOffering getNetworkOffering(long id) {
        return _networkOfferingDao.findById(id);
    }

    @Override
    public Integer getNetworkOfferingNetworkRate(long networkOfferingId) {

        // validate network offering information
        NetworkOffering no = getNetworkOffering(networkOfferingId);
        if (no == null) {
            throw new InvalidParameterValueException("Unable to find network offering by id=" + networkOfferingId);
        }

        Integer networkRate;
        if (no.getRateMbps() != null) {
            networkRate = no.getRateMbps();
        } else {
            networkRate = Integer.parseInt(_configDao.getValue(Config.NetworkThrottlingRate.key()));
        }

        // networkRate is unsigned int in netowrkOfferings table, and can't be
        // set to -1
        // so 0 means unlimited; we convert it to -1, so we are consistent with
        // all our other resources where -1 means unlimited
        if (networkRate == 0) {
            networkRate = -1;
        }

        return networkRate;
    }

    @Override
    public Account getVlanAccount(long vlanId) {
        Vlan vlan = _vlanDao.findById(vlanId);
        Long accountId = null;

        // if vlan is Virtual Account specific, get vlan information from the
        // accountVlanMap; otherwise get account information
        // from the network
        if (vlan.getVlanType() == VlanType.VirtualNetwork) {
            List<AccountVlanMapVO> maps = _accountVlanMapDao.listAccountVlanMapsByVlan(vlanId);
            if (maps != null && !maps.isEmpty()) {
                return _accountMgr.getAccount(maps.get(0).getAccountId());
            }
        }

        Long networkId = vlan.getNetworkId();
        if (networkId != null) {
            Network network = _networkModel.getNetwork(networkId);
            if (network != null) {
                accountId = network.getAccountId();
            }
        }

        return _accountMgr.getAccount(accountId);
    }

    @Override
    public List<? extends NetworkOffering> listNetworkOfferings(TrafficType trafficType, boolean systemOnly) {
        Filter searchFilter = new Filter(NetworkOfferingVO.class, "created", false, null, null);
        SearchCriteria<NetworkOfferingVO> sc = _networkOfferingDao.createSearchCriteria();
        if (trafficType != null) {
            sc.addAnd("trafficType", SearchCriteria.Op.EQ, trafficType);
        }
        sc.addAnd("systemOnly", SearchCriteria.Op.EQ, systemOnly);

        return _networkOfferingDao.search(sc, searchFilter);
    }

    @Override
    @DB
    public boolean deleteAccountSpecificVirtualRanges(long accountId) {
        List<AccountVlanMapVO> maps = _accountVlanMapDao.listAccountVlanMapsByAccount(accountId);
        boolean result = true;
        if (maps != null && !maps.isEmpty()) {
            Transaction txn = Transaction.currentTxn();
            txn.start();
            for (AccountVlanMapVO map : maps) {
                if (!deleteVlanAndPublicIpRange(_accountMgr.getSystemUser().getId(), map.getVlanDbId(), 
                        _accountMgr.getAccount(Account.ACCOUNT_ID_SYSTEM))) {
                    result = false;
                }
            }
            if (result) {
                txn.commit();
            } else {
                s_logger.error("Failed to delete account specific virtual ip ranges for account id=" + accountId);
            }
        } else {
            s_logger.trace("Account id=" + accountId + " has no account specific virtual ip ranges, nothing to delete");
        }
        return result;
    }

    @Override
    public HostPodVO getPod(long id) {
        return _podDao.findById(id);
    }

    @Override
    public ClusterVO getCluster(long id) {
        return _clusterDao.findById(id);
    }
    
    @Override
    public AllocationState findClusterAllocationState(ClusterVO cluster){
    	
    	if(cluster.getAllocationState() == AllocationState.Disabled){
    		return AllocationState.Disabled;
    	}else if(ApiDBUtils.findPodById(cluster.getPodId()).getAllocationState() == AllocationState.Disabled){
    		return AllocationState.Disabled;
    	}else {
    		DataCenterVO zone = ApiDBUtils.findZoneById(cluster.getDataCenterId());
    		return zone.getAllocationState();
    	}    	
    }    

    @Override
    public AllocationState findPodAllocationState(HostPodVO pod){
    	
    	if(pod.getAllocationState() == AllocationState.Disabled){
    		return AllocationState.Disabled;
    	}else {
    		DataCenterVO zone = ApiDBUtils.findZoneById(pod.getDataCenterId());
    		return zone.getAllocationState();
    	}    	
    }
    
    private boolean allowIpRangeOverlap(VlanVO vlan, boolean forVirtualNetwork, long networkId) {
        // FIXME - delete restriction for virtual network in the future
        if (vlan.getVlanType() == VlanType.DirectAttached && !forVirtualNetwork) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public ServiceOffering getServiceOffering(long serviceOfferingId) {
        ServiceOfferingVO offering = _serviceOfferingDao.findById(serviceOfferingId);
        if (offering != null && offering.getRemoved() == null) {
            return offering;
        }

        return null;
    }

    @Override
    public Long getDefaultPageSize() {
        return _defaultPageSize;
    }

    @Override
    public Integer getServiceOfferingNetworkRate(long serviceOfferingId) {

        // validate network offering information
        ServiceOffering offering = _serviceOfferingDao.findById(serviceOfferingId);
        if (offering == null) {
            throw new InvalidParameterValueException("Unable to find service offering by id=" + serviceOfferingId);
        }

        Integer networkRate;
        if (offering.getRateMbps() != null) {
            networkRate = offering.getRateMbps();
        } else {
            // for domain router service offering, get network rate from
            if (offering.getSystemVmType() != null && offering.getSystemVmType().equalsIgnoreCase(VirtualMachine.Type.DomainRouter.toString())) {
                networkRate = Integer.parseInt(_configDao.getValue(Config.NetworkThrottlingRate.key()));
            } else {
                networkRate = Integer.parseInt(_configDao.getValue(Config.VmNetworkThrottlingRate.key()));
            }
        }

        // networkRate is unsigned int in serviceOffering table, and can't be
        // set to -1
        // so 0 means unlimited; we convert it to -1, so we are consistent with
        // all our other resources where -1 means unlimited
        if (networkRate == 0) {
            networkRate = -1;
        }

        return networkRate;
    }

    @Override
    public DiskOffering getDiskOffering(long diskOfferingId) {
        DiskOfferingVO offering = _diskOfferingDao.findById(diskOfferingId);
        if (offering != null && offering.getRemoved() == null) {
            return offering;
        }

        return null;
    }
}