| /* |
| * 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.synapse.config.xml.endpoints; |
| |
| import org.apache.axiom.om.OMAttribute; |
| import org.apache.axiom.om.OMElement; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.synapse.SynapseConstants; |
| import org.apache.synapse.SynapseException; |
| import org.apache.synapse.config.xml.XMLConfigConstants; |
| import org.apache.synapse.config.xml.endpoints.utils.LoadbalanceAlgorithmFactory; |
| import org.apache.synapse.core.LoadBalanceMembershipHandler; |
| import org.apache.synapse.endpoints.DynamicLoadbalanceEndpoint; |
| import org.apache.synapse.endpoints.Endpoint; |
| import org.apache.synapse.endpoints.dispatch.Dispatcher; |
| import org.apache.synapse.endpoints.dispatch.SoapSessionDispatcher; |
| import org.apache.synapse.endpoints.dispatch.HttpSessionDispatcher; |
| import org.apache.synapse.endpoints.algorithms.LoadbalanceAlgorithm; |
| |
| import javax.xml.namespace.QName; |
| import java.util.Iterator; |
| import java.util.Properties; |
| |
| /** |
| * Creates {@link DynamicLoadbalanceEndpoint} using an XML configuration. |
| * |
| * <pre> |
| * <endpoint> |
| * <dynamicLoadbalance [failover="true|false"] [policy="load balance algorithm"]> |
| * <membershipHandler |
| * class="HandlerClass"> |
| * <property name="some name" value="some domain"/>+ |
| * </membershipHandler> |
| * </dynamicLoadbalance> |
| * </endpoint> |
| * </pre> |
| */ |
| public class DynamicLoadbalanceEndpointFactory extends EndpointFactory { |
| |
| private static final Log log = LogFactory.getLog(DynamicLoadbalanceEndpointFactory.class); |
| private static DynamicLoadbalanceEndpointFactory instance = |
| new DynamicLoadbalanceEndpointFactory(); |
| |
| private DynamicLoadbalanceEndpointFactory() { |
| } |
| |
| public static DynamicLoadbalanceEndpointFactory getInstance() { |
| return instance; |
| } |
| |
| protected Endpoint createEndpoint(OMElement epConfig, boolean anonymousEndpoint, |
| Properties properties) { |
| |
| OMElement loadbalanceElement = |
| epConfig.getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, |
| "dynamicLoadbalance")); |
| |
| if (loadbalanceElement != null) { |
| |
| DynamicLoadbalanceEndpoint loadbalanceEndpoint = new DynamicLoadbalanceEndpoint(); |
| |
| // set endpoint name |
| OMAttribute name = |
| epConfig.getAttribute(new QName(XMLConfigConstants.NULL_NAMESPACE, "name")); |
| |
| if (name != null) { |
| loadbalanceEndpoint.setName(name.getAttributeValue()); |
| } |
| |
| // get the session for this endpoint |
| OMElement sessionElement = epConfig. |
| getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, "session")); |
| if (sessionElement != null) { |
| |
| OMElement sessionTimeout = sessionElement.getFirstChildWithName( |
| new QName(SynapseConstants.SYNAPSE_NAMESPACE, "sessionTimeout")); |
| |
| if (sessionTimeout != null) { |
| try { |
| loadbalanceEndpoint.setSessionTimeout(Long.parseLong( |
| sessionTimeout.getText().trim())); |
| } catch (NumberFormatException nfe) { |
| handleException("Invalid session timeout value : " + sessionTimeout.getText()); |
| } |
| } |
| |
| String type = sessionElement.getAttributeValue(new QName("type")); |
| |
| if (type.equalsIgnoreCase("soap")) { |
| Dispatcher soapDispatcher = new SoapSessionDispatcher(); |
| loadbalanceEndpoint.setDispatcher(soapDispatcher); |
| |
| } else if (type.equalsIgnoreCase("http")) { |
| Dispatcher httpDispatcher = new HttpSessionDispatcher(); |
| loadbalanceEndpoint.setDispatcher(httpDispatcher); |
| |
| } |
| |
| loadbalanceEndpoint.setSessionAffinity(true); |
| } |
| |
| // set if failover is turned off |
| String failover = loadbalanceElement.getAttributeValue(new QName("failover")); |
| if (failover != null && failover.equalsIgnoreCase("false")) { |
| loadbalanceEndpoint.setFailover(false); |
| } else { |
| loadbalanceEndpoint.setFailover(true); |
| } |
| |
| OMElement eventHandler = |
| loadbalanceElement. |
| getFirstChildWithName(new QName(SynapseConstants.SYNAPSE_NAMESPACE, |
| "membershipHandler")); |
| if (eventHandler != null) { |
| String clazz = eventHandler.getAttributeValue(new QName( |
| XMLConfigConstants.NULL_NAMESPACE, "class")); |
| if (clazz == null) { |
| handleException("class attribute is required on the membershipHandler element"); |
| } else { |
| clazz = clazz.trim(); |
| } |
| try { |
| LoadBalanceMembershipHandler lbMembershipHandler = |
| (LoadBalanceMembershipHandler) Class.forName(clazz).newInstance(); |
| Properties lbProperties = new Properties(); |
| for (Iterator props = eventHandler.getChildrenWithName(new QName( |
| SynapseConstants.SYNAPSE_NAMESPACE, "property")); props.hasNext();) { |
| OMElement prop = (OMElement) props.next(); |
| String propName = |
| prop.getAttributeValue(new QName(XMLConfigConstants.NULL_NAMESPACE, |
| "name")).trim(); |
| String propValue = |
| prop.getAttributeValue(new QName(XMLConfigConstants.NULL_NAMESPACE, |
| "value")).trim(); |
| lbProperties.put(propName, propValue); |
| } |
| |
| // Set load balance algorithm |
| LoadbalanceAlgorithm algorithm = |
| LoadbalanceAlgorithmFactory. |
| createLoadbalanceAlgorithm(loadbalanceElement, null); |
| lbMembershipHandler.init(lbProperties, algorithm); |
| loadbalanceEndpoint.setLoadBalanceMembershipHandler(lbMembershipHandler); |
| } catch (Exception e) { |
| String msg = "Could not instantiate " + |
| "LoadBalanceMembershipHandler implementation " + clazz; |
| handleException(msg, e); |
| } |
| } else { |
| handleException("membershipHandler element is required"); |
| } |
| |
| processProperties(loadbalanceEndpoint, epConfig); |
| |
| return loadbalanceEndpoint; |
| } |
| return null; |
| } |
| } |