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| <h1>Simple MDB and CDI |
| |
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| <p><em>Help us document this example! Click the blue pencil icon in the upper right to edit this page.</em></p> |
| |
| <h2>ChatBean</h2> |
| |
| <pre><code>package org.superbiz.mdb; |
| |
| import javax.annotation.Resource; |
| import javax.ejb.MessageDriven; |
| import javax.inject.Inject; |
| import javax.jms.Connection; |
| import javax.jms.ConnectionFactory; |
| import javax.jms.DeliveryMode; |
| import javax.jms.JMSException; |
| import javax.jms.Message; |
| import javax.jms.MessageListener; |
| import javax.jms.MessageProducer; |
| import javax.jms.Queue; |
| import javax.jms.Session; |
| import javax.jms.TextMessage; |
| |
| @MessageDriven |
| public class ChatBean implements MessageListener { |
| |
| @Resource |
| private ConnectionFactory connectionFactory; |
| |
| @Resource(name = "AnswerQueue") |
| private Queue answerQueue; |
| |
| @Inject |
| private ChatRespondCreator responder; |
| |
| public void onMessage(Message message) { |
| try { |
| |
| final TextMessage textMessage = (TextMessage) message; |
| final String question = textMessage.getText(); |
| final String response = responder.respond(question); |
| |
| if (response != null) { |
| respond(response); |
| } |
| } catch (JMSException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| private void respond(String text) throws JMSException { |
| |
| Connection connection = null; |
| Session session = null; |
| |
| try { |
| connection = connectionFactory.createConnection(); |
| connection.start(); |
| |
| // Create a Session |
| session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| |
| // Create a MessageProducer from the Session to the Topic or Queue |
| MessageProducer producer = session.createProducer(answerQueue); |
| producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); |
| |
| // Create a message |
| TextMessage message = session.createTextMessage(text); |
| |
| // Tell the producer to send the message |
| producer.send(message); |
| } finally { |
| // Clean up |
| if (session != null) session.close(); |
| if (connection != null) connection.close(); |
| } |
| } |
| } |
| </code></pre> |
| |
| <h2>ChatRespondCreator</h2> |
| |
| <pre><code>package org.superbiz.mdb; |
| |
| public class ChatRespondCreator { |
| public String respond(String question) { |
| if ("Hello World!".equals(question)) { |
| return "Hello, Test Case!"; |
| } else if ("How are you?".equals(question)) { |
| return "I'm doing well."; |
| } else if ("Still spinning?".equals(question)) { |
| return "Once every day, as usual."; |
| } |
| return null; |
| } |
| } |
| </code></pre> |
| |
| <h2>beans.xml</h2> |
| |
| <pre><code><!-- |
| |
| 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. |
| --> |
| |
| <beans/> |
| </code></pre> |
| |
| <h2>ChatBeanTest</h2> |
| |
| <pre><code>package org.superbiz.mdb; |
| |
| import junit.framework.TestCase; |
| |
| import javax.annotation.Resource; |
| import javax.ejb.embeddable.EJBContainer; |
| import javax.jms.Connection; |
| import javax.jms.ConnectionFactory; |
| import javax.jms.JMSException; |
| import javax.jms.MessageConsumer; |
| import javax.jms.MessageProducer; |
| import javax.jms.Queue; |
| import javax.jms.Session; |
| import javax.jms.TextMessage; |
| |
| public class ChatBeanTest extends TestCase { |
| |
| @Resource |
| private ConnectionFactory connectionFactory; |
| |
| @Resource(name = "ChatBean") |
| private Queue questionQueue; |
| |
| @Resource(name = "AnswerQueue") |
| private Queue answerQueue; |
| |
| public void test() throws Exception { |
| EJBContainer.createEJBContainer().getContext().bind("inject", this); |
| |
| |
| final Connection connection = connectionFactory.createConnection(); |
| |
| connection.start(); |
| |
| final Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| |
| final MessageProducer questions = session.createProducer(questionQueue); |
| |
| final MessageConsumer answers = session.createConsumer(answerQueue); |
| |
| |
| sendText("Hello World!", questions, session); |
| |
| assertEquals("Hello, Test Case!", receiveText(answers)); |
| |
| |
| sendText("How are you?", questions, session); |
| |
| assertEquals("I'm doing well.", receiveText(answers)); |
| |
| |
| sendText("Still spinning?", questions, session); |
| |
| assertEquals("Once every day, as usual.", receiveText(answers)); |
| } |
| |
| private void sendText(String text, MessageProducer questions, Session session) throws JMSException { |
| |
| questions.send(session.createTextMessage(text)); |
| } |
| |
| private String receiveText(MessageConsumer answers) throws JMSException { |
| |
| return ((TextMessage) answers.receive(1000)).getText(); |
| } |
| } |
| </code></pre> |
| |
| |
| <div class="page-header"> </div> |
| <h4>APIs Used</h4> |
| <ul><li><a href="http://docs.oracle.com/javaee/6/api/javax/annotation/Resource.html">javax.annotation.Resource</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/ejb/MessageDriven.html">javax.ejb.MessageDriven</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/ejb/embeddable/EJBContainer.html">javax.ejb.embeddable.EJBContainer</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/inject/Inject.html">javax.inject.Inject</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/Connection.html">javax.jms.Connection</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/ConnectionFactory.html">javax.jms.ConnectionFactory</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/DeliveryMode.html">javax.jms.DeliveryMode</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/JMSException.html">javax.jms.JMSException</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/Message.html">javax.jms.Message</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/MessageConsumer.html">javax.jms.MessageConsumer</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/MessageListener.html">javax.jms.MessageListener</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/MessageProducer.html">javax.jms.MessageProducer</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/Queue.html">javax.jms.Queue</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/Session.html">javax.jms.Session</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/jms/TextMessage.html">javax.jms.TextMessage</a></li> |
| </ul> |
| |
| <h3>Source</h3> |
| <ul> |
| <li>Apache <a href="http://svn.apache.org/repos/asf/tomee/tomee/trunk/examples/simple-mdb-and-cdi">simple-mdb-and-cdi</a></li> |
| <li>Github <a href="https://github.com/apache/tomee/tree/trunk/examples/simple-mdb-and-cdi">simple-mdb-and-cdi</a></li> |
| </ul> |
| <pre> |
| svn co http://svn.apache.org/repos/asf/tomee/tomee/trunk/examples/simple-mdb-and-cdi |
| cd simple-mdb-and-cdi |
| mvn clean install |
| </pre> |
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