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<title>HornetQ Java EE Injected JMSContext Example</title>
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<h1>Java EE Injected JMSContext Example</h1>
<p>This example shows you how to inject a JMSContext into an MDB and use it to send a reply to a JMS Client</p>
<h2>Wildfly configuration</h2>
<p>The example leverages the JBoss Arquillian framework to run an Wildfly 8 instance and deploy the MDB.</p>
<h2>Example step-by-step</h2>
<p><i>download The latest Wildfly 8 from <a href="http://www.wildfly.org/download/">here</a> and install.</i></p>
<p><i>set the JBOSS_HOME property to point to the WildFly install directory</i></p>
<p><i>To run the example simply type <code>mvn test</code>from the example directory</i></p>
<ol>
<li> Firstly in the MDB we inject the JMSContext. This will use the Default Connection Factory configured.
</li>
<pre class="prettyprint">
<code>
@Inject
javax.jms.JMSContext context;</code>
<li>We then map the reply queue as a resource.
</li>
<pre class="prettyprint">
<code>
@Resource(mappedName = "java:/queue/replyQueue")
Queue replyQueue;</code>
</pre>
<li>First we need to get an initial context so we can look-up the JMS connection factory and destination objects from JNDI.</li>
<pre class="prettyprint">
<code>
final Properties env = new Properties();
env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
env.put(Context.PROVIDER_URL, "http-remoting://localhost:8080");
initialContext = new InitialContext(env);
</code>
</pre>
<li>We look up the JMS queue object from JNDI</li>
<pre class="prettyprint">
<code>Queue queue = (Queue)initialContext.lookup("jms/queues/testQueue");</code>
</pre>
<li>We look up the JMS connection factory object from JNDI</li>
<pre class="prettyprint">
<code>ConnectionFactory cf = (ConnectionFactory)initialContext.lookup("jms/RemoteConnectionFactory");</code>
</pre>
<li>We create a JMSContext inside the try-with-resource block so it auto closes</li>
<pre class="prettyprint">
<code>
try
(
// Step 6.Create a JMS Connection inside the try-with-resource block so it will auto close
JMSContext context = cf.createContext("guest", "password")
)
</code>
</pre>
<li>We create a JMS Producer and send a String as a message.</li>
<pre class="prettyprint">
<code>context.createProducer().send(queue, "This is a text message");</code>
</pre>
<li>We start the context so we can receive messages.</li>
<pre class="prettyprint">
<code>context.start();</code>
</pre>
<li>We look up the reply queue.</li>
<pre class="prettyprint">
<code>Queue replyQueue = (Queue)initialContext.lookup("jms/queues/replyQueue");</code>
</pre>
<li>We receive the body, as a String, of the reply message.</li>
<pre class="prettyprint">
<code> String text = context.createConsumer(replyQueue).receiveBody(String.class);</code>
</pre>
<li>And finally, close the initial context.</li>
<pre class="prettyprint">
<code>finally
{
if (initialContext != null)
{
initialContext.close();
}
}</code>
</pre>
</ol>
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