| /******************************************************************************* |
| * 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.ofbiz.service.jms; |
| |
| import java.util.Map; |
| |
| import javax.jms.ExceptionListener; |
| import javax.jms.JMSException; |
| import javax.jms.MapMessage; |
| import javax.jms.Message; |
| |
| import org.apache.ofbiz.base.util.Debug; |
| import org.apache.ofbiz.base.util.ObjectType; |
| import org.apache.ofbiz.base.util.UtilGenerics; |
| import org.apache.ofbiz.entity.Delegator; |
| import org.apache.ofbiz.entity.serialize.XmlSerializer; |
| import org.apache.ofbiz.service.GenericServiceException; |
| import org.apache.ofbiz.service.LocalDispatcher; |
| import org.apache.ofbiz.service.ModelService; |
| import org.apache.ofbiz.service.ServiceContainer; |
| |
| /** |
| * AbstractJmsListener |
| */ |
| public abstract class AbstractJmsListener implements GenericMessageListener, ExceptionListener { |
| |
| public static final String module = AbstractJmsListener.class.getName(); |
| |
| protected LocalDispatcher dispatcher; |
| protected boolean isConnected = false; |
| |
| /** |
| * Initializes the LocalDispatcher for this service listener. |
| * @param delegator the delegator associated to the dispatcher |
| */ |
| protected AbstractJmsListener(Delegator delegator) { |
| this.dispatcher = ServiceContainer.getLocalDispatcher("JMSDispatcher", delegator); |
| } |
| |
| /** |
| * Runs the service defined in the MapMessage |
| * @param message |
| * @return Map |
| */ |
| protected Map<String, Object> runService(MapMessage message) { |
| Map<String, ? extends Object> context = null; |
| String serviceName = null; |
| String xmlContext = null; |
| |
| try { |
| serviceName = message.getString("serviceName"); |
| xmlContext = message.getString("serviceContext"); |
| if (serviceName == null || xmlContext == null) { |
| Debug.logError("Message received is not an OFB service message. Ignored!", module); |
| return null; |
| } |
| |
| Object o = XmlSerializer.deserialize(xmlContext, dispatcher.getDelegator()); |
| |
| if (Debug.verboseOn()) Debug.logVerbose("De-Serialized Context --> " + o, module); |
| if (ObjectType.instanceOf(o, "java.util.Map")) |
| context = UtilGenerics.checkMap(o); |
| } catch (JMSException je) { |
| Debug.logError(je, "Problems reading message.", module); |
| } catch (Exception e) { |
| Debug.logError(e, "Problems deserializing the service context.", module); |
| } |
| |
| try { |
| ModelService model = dispatcher.getDispatchContext().getModelService(serviceName); |
| if (!model.export) { |
| Debug.logWarning("Attempt to invoke a non-exported service: " + serviceName, module); |
| return null; |
| } |
| } catch (GenericServiceException e) { |
| Debug.logError(e, "Unable to get ModelService for service : " + serviceName, module); |
| } |
| |
| if (Debug.verboseOn()) Debug.logVerbose("Running service: " + serviceName, module); |
| |
| Map<String, Object> result = null; |
| if (context != null) { |
| try { |
| result = dispatcher.runSync(serviceName, context); |
| } catch (GenericServiceException gse) { |
| Debug.logError(gse, "Problems with service invocation.", module); |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Receives the MapMessage and processes the service. |
| * @see javax.jms.MessageListener#onMessage(Message) |
| */ |
| public void onMessage(Message message) { |
| MapMessage mapMessage = null; |
| |
| if (Debug.verboseOn()) Debug.logVerbose("JMS Message Received --> " + message, module); |
| |
| if (message instanceof MapMessage) { |
| mapMessage = (MapMessage) message; |
| } else { |
| Debug.logError("Received message is not a MapMessage!", module); |
| return; |
| } |
| runService(mapMessage); |
| } |
| |
| /** |
| * On exception try to re-establish connection to the JMS server. |
| * @see javax.jms.ExceptionListener#onException(JMSException) |
| */ |
| public void onException(JMSException je) { |
| this.setConnected(false); |
| Debug.logError(je, "JMS connection exception", module); |
| while (!isConnected()) { |
| try { |
| this.refresh(); |
| } catch (GenericServiceException e) { |
| try { |
| Thread.sleep(10000); |
| } catch (InterruptedException ie) {} |
| continue; |
| } |
| } |
| } |
| |
| /** |
| * |
| * @see org.apache.ofbiz.service.jms.GenericMessageListener#refresh() |
| */ |
| public void refresh() throws GenericServiceException { |
| this.close(); |
| this.load(); |
| } |
| |
| /** |
| * |
| * @see org.apache.ofbiz.service.jms.GenericMessageListener#isConnected() |
| */ |
| public boolean isConnected() { |
| return this.isConnected; |
| } |
| |
| /** |
| * Setter method for the connected field. |
| * @param connected |
| */ |
| protected void setConnected(boolean connected) { |
| this.isConnected = connected; |
| } |
| |
| } |