| /* |
| * 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 org.apache.geode.management.internal; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.annotations.internal.MakeNotStatic; |
| import org.apache.geode.distributed.DistributedSystemDisconnectedException; |
| import org.apache.geode.distributed.internal.InternalDistributedSystem; |
| import org.apache.geode.internal.cache.InternalCache; |
| import org.apache.geode.internal.cache.InternalCacheForClientAccess; |
| import org.apache.geode.internal.logging.LogService; |
| import org.apache.geode.management.ManagementService; |
| |
| /** |
| * Super class to all Management Service |
| * |
| * @since GemFire 7.0 |
| */ |
| public abstract class BaseManagementService extends ManagementService { |
| |
| private static final Logger logger = LogService.getLogger(); |
| |
| /** |
| * The main mapping between different resources and Service instance Object can be Cache |
| */ |
| @MakeNotStatic |
| protected static final Map<Object, BaseManagementService> instances = |
| new HashMap<Object, BaseManagementService>(); |
| |
| /** List of connected <code>DistributedSystem</code>s */ |
| @MakeNotStatic |
| private static final List<InternalDistributedSystem> systems = |
| new ArrayList<InternalDistributedSystem>(1); |
| |
| /** Protected constructor. */ |
| protected BaseManagementService() {} |
| |
| // Static block to initialize the ConnectListener on the System |
| static { |
| initInternalDistributedSystem(); |
| } |
| |
| /** |
| * This method will close the service. Any operation on the service instance will throw exception |
| */ |
| protected abstract void close(); |
| |
| /** |
| * This method will close the service. Any operation on the service instance will throw exception |
| */ |
| protected abstract boolean isClosed(); |
| |
| /** |
| * Returns a ManagementService to use for the specified Cache. |
| * |
| * @param cache defines the scope of resources to be managed |
| */ |
| public static ManagementService getManagementService(InternalCacheForClientAccess cache) { |
| synchronized (instances) { |
| BaseManagementService service = instances.get(cache); |
| if (service == null) { |
| service = SystemManagementService.newSystemManagementService(cache); |
| instances.put(cache, service); |
| |
| } |
| return service; |
| } |
| } |
| |
| public static ManagementService getExistingManagementService(InternalCache cache) { |
| synchronized (instances) { |
| BaseManagementService service = instances.get(cache.getCacheForProcessingClientRequests()); |
| return service; |
| } |
| } |
| |
| /** |
| * Initialises the distributed system listener |
| */ |
| private static void initInternalDistributedSystem() { |
| synchronized (instances) { |
| // Initialize our own list of distributed systems via a connect listener |
| @SuppressWarnings("unchecked") |
| List<InternalDistributedSystem> existingSystems = InternalDistributedSystem |
| .addConnectListener(new InternalDistributedSystem.ConnectListener() { |
| @Override |
| public void onConnect(InternalDistributedSystem sys) { |
| addInternalDistributedSystem(sys); |
| } |
| }); |
| |
| // While still holding the lock on systems, add all currently known |
| // systems to our own list |
| for (InternalDistributedSystem sys : existingSystems) { |
| try { |
| if (sys.isConnected()) { |
| addInternalDistributedSystem(sys); |
| } |
| } catch (DistributedSystemDisconnectedException e) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("DistributedSystemDisconnectedException {}", e.getMessage(), e); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Add an Distributed System and adds a Discon Listener |
| */ |
| private static void addInternalDistributedSystem(InternalDistributedSystem sys) { |
| synchronized (instances) { |
| sys.addDisconnectListener(new InternalDistributedSystem.DisconnectListener() { |
| @Override |
| public String toString() { |
| return "Disconnect listener for BaseManagementService"; |
| } |
| |
| @Override |
| public void onDisconnect(InternalDistributedSystem ss) { |
| removeInternalDistributedSystem(ss); |
| } |
| }); |
| systems.add(sys); |
| } |
| } |
| |
| /** |
| * Remove a Distributed System from the system lists. If list is empty it closes down all the |
| * services if not closed |
| */ |
| private static void removeInternalDistributedSystem(InternalDistributedSystem sys) { |
| synchronized (instances) { |
| systems.remove(sys); |
| if (systems.isEmpty()) { |
| for (Object key : instances.keySet()) { |
| BaseManagementService service = (BaseManagementService) instances.get(key); |
| try { |
| if (!service.isClosed()) { |
| // Service close method should take care of the cleaning up |
| // activities |
| service.close(); |
| } |
| |
| } catch (Exception e) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("ManagementException while removing InternalDistributedSystem {}", |
| e.getMessage(), e); |
| } |
| } |
| } |
| instances.clear(); |
| } |
| } |
| } |
| } |