| /* |
| * 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.uima.adapter.jms.client; |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import javax.jms.BytesMessage; |
| import javax.jms.Connection; |
| import javax.jms.DeliveryMode; |
| import javax.jms.Destination; |
| import javax.jms.JMSException; |
| import javax.jms.MessageProducer; |
| import javax.jms.Session; |
| import javax.jms.TextMessage; |
| |
| import org.apache.activemq.ActiveMQConnection; |
| import org.apache.activemq.ActiveMQMessageProducer; |
| import org.apache.activemq.ActiveMQSession; |
| import org.apache.activemq.command.ActiveMQDestination; |
| import org.apache.uima.UIMAFramework; |
| import org.apache.uima.aae.UIMAEE_Constants; |
| import org.apache.uima.adapter.jms.JmsConstants; |
| import org.apache.uima.util.Level; |
| |
| /** |
| * Initializes JMS session and creates JMS MessageProducer to be used for sending messages to a |
| * given destination. It extends BaseMessageSender which starts the worker thread and is tasked with |
| * sending messages. The application threads share a common 'queue' with the worker thread. The |
| * application threads add messages to the pendingMessageList 'queue' and the worker thread consumes |
| * them. |
| * |
| */ |
| public class ActiveMQMessageSender extends BaseMessageSender { |
| private static final Class CLASS_NAME = ActiveMQMessageSender.class; |
| |
| private volatile Connection connection = null; |
| |
| private Session session = null; |
| |
| private MessageProducer producer = null; |
| |
| private String destinationName = null; |
| |
| private ConcurrentHashMap<Destination, MessageProducer> producerMap = new ConcurrentHashMap<Destination, MessageProducer>(); |
| |
| public ActiveMQMessageSender(Connection aConnection, String aDestinationName, |
| BaseUIMAAsynchronousEngineCommon_impl engine) throws Exception { |
| super(engine); |
| connection = aConnection; |
| destinationName = aDestinationName; |
| } |
| |
| public synchronized MessageProducer getMessageProducer(Destination destination) throws Exception { |
| if (producerMap.containsKey(destination)) { |
| return (MessageProducer) producerMap.get(destination); |
| } |
| createSession(); |
| MessageProducer mProducer = session.createProducer(destination); |
| mProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); |
| producerMap.put(destination, mProducer); |
| return mProducer; |
| } |
| /** |
| * This is called when a new Connection is created after broker is restarted |
| */ |
| public void setConnection(Connection aConnection) { |
| connection = aConnection; |
| cleanup(); |
| try { |
| initializeProducer(); |
| } catch( Exception e) { |
| if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.WARNING)) { |
| UIMAFramework.getLogger(CLASS_NAME).logrb(Level.WARNING, getClass().getName(), |
| "setConnection", UIMAEE_Constants.JMS_LOG_RESOURCE_BUNDLE, |
| "UIMAEE_exception__WARNING", new Object[] { e }); |
| } |
| } |
| |
| } |
| private String getBrokerURL() { |
| try { |
| return ((ActiveMQConnection) connection).getBrokerInfo().getBrokerURL(); |
| } catch (Exception ex) { /* handle silently. */ |
| } |
| return ""; |
| } |
| |
| private void createSession() throws Exception { |
| String broker = getBrokerURL(); |
| try { |
| if (session == null || engine.producerInitialized == false) { |
| session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| } |
| } catch (JMSException e) { |
| if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(CLASS_NAME).logrb(Level.INFO, CLASS_NAME.getName(), |
| "createSession", JmsConstants.JMS_LOG_RESOURCE_BUNDLE, |
| "UIMAJMS_client_failed_creating_session_INFO", |
| new Object[] { destinationName, broker }); |
| } |
| if (connection == null) { |
| System.out.println("UIMA AS Client Shared Connection Is Not Initialized"); |
| if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(CLASS_NAME).logrb(Level.INFO, CLASS_NAME.getName(), |
| "createSession", JmsConstants.JMS_LOG_RESOURCE_BUNDLE, |
| "UIMAJMS_client_connection_not_ready_INFO", new Object[] { broker }); |
| } |
| } else if (((ActiveMQConnection) connection).isClosed() |
| || ((ActiveMQConnection) connection).isClosing()) { |
| if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.INFO)) { |
| UIMAFramework.getLogger(CLASS_NAME) |
| .logrb(Level.INFO, CLASS_NAME.getName(), "createSession", |
| JmsConstants.JMS_LOG_RESOURCE_BUNDLE, |
| "UIMAJMS_client_connection_closed_INFO", |
| new Object[] { destinationName, broker }); |
| } |
| } |
| throw e; |
| } catch (Exception e) { |
| throw e; |
| } |
| } |
| |
| /** |
| * Creates a jms session object used to instantiate message producer |
| */ |
| protected void initializeProducer() throws Exception { |
| createSession(); |
| producer = getMessageProducer(session.createQueue(destinationName)); |
| } |
| |
| /** |
| * Returns the full name of the destination queue |
| */ |
| protected String getDestinationEndpoint() throws Exception { |
| return ((ActiveMQDestination) producer.getDestination()).getPhysicalName(); |
| } |
| |
| /** |
| * Returns jsm MessageProducer |
| */ |
| public MessageProducer getMessageProducer() { |
| if ( engine.producerInitialized == false ) { |
| try { |
| setConnection(engine.sharedConnection.getConnection()); |
| initializeProducer(); |
| engine.producerInitialized = true; |
| } catch( Exception e) { |
| e.printStackTrace(); |
| if (UIMAFramework.getLogger(CLASS_NAME).isLoggable(Level.WARNING)) { |
| UIMAFramework.getLogger(CLASS_NAME).logrb(Level.WARNING, getClass().getName(), |
| "getMessageProducer", UIMAEE_Constants.JMS_LOG_RESOURCE_BUNDLE, |
| "UIMAEE_exception__WARNING", new Object[] { e }); |
| } |
| } |
| } |
| return producer; |
| } |
| |
| public TextMessage createTextMessage() throws Exception { |
| if (session == null) { |
| // Force initialization of Producer |
| initializeProducer(); |
| } |
| return session.createTextMessage(""); |
| } |
| |
| public BytesMessage createBytesMessage() throws Exception { |
| if (session == null) { |
| // Force initialization of Producer |
| initializeProducer(); |
| } |
| return session.createBytesMessage(); |
| } |
| |
| /** |
| * Cleanup any jms resources used by the worker thread |
| */ |
| protected void cleanup() { |
| try { |
| if (session != null) { |
| session.close(); |
| session = null; |
| } |
| if (producer != null) { |
| producer.close(); |
| producer = null; |
| } |
| } catch (Exception e) { |
| System.out.println("JMS Exception While Closing Session - Ignoring"); |
| // Ignore we are shutting down |
| } finally { |
| producerMap.clear(); |
| } |
| } |
| } |