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<h1>Stomp Example</h1>
<p>This example shows you how to configure ActiveMQ to send and receive Stomp messages.</p>
<p>The example will start a ActiveMQ server configured with Stomp and JMS.</p>
<p>The client will open a socket to send one Stomp message (using TCP directly).
The client will then consume a message from a JMS Queue and check it is the message sent with Stomp.</p>
<h2>Example step-by-step</h2>
<p><i>To run the example, simply type <code>mvn verify</code> from this directory</i></p>
<ol>
<li>We create a TCP socket to connect to the Stomp port
<pre class="prettyprint">
Socket socket = new Socket("localhost", 61613);
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<li>We send a CONNECT frame to connect to the server</li>
<pre class="prettyprint">
String connectFrame = "CONNECT\n" +
"login: guest\n" +
"passcode: guest\n" +
"request-id: 1\n" +
"\n" +
Stomp.NULL;
sendFrame(socket, connectFrame);
</pre>
<li>We send a SEND frame (a Stomp message) to the destination <code>jms.queue.exampleQueue</code>
(which corresponds to the ActiveMQ address for the JMS Queue <code>exampleQueue</code>) with a text body</li>
<pre class="prettyprint">
String text = "Hello, world from Stomp!";
String message = "SEND\n" +
"destination: jms.queue.exampleQueue\n" +
"\n" +
text +
Stomp.NULL;
sendFrame(socket, message);
System.out.println("Sent Stomp message: " + text);
</pre>
<li>We send a DISCONNECT frame to disconnect from the server</li>
<pre class="prettyprint">
String disconnectFrame = "DISCONNECT\n" +
"\n" +
Stomp.NULL;
sendFrame(socket, disconnectFrame);
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<li>We close the TCP socket</li>
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socket.close();
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<li>We create an initial context to perform the JNDI lookup.</li>
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initialContext = getContext(0);
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<li>We perform a lookup on the queue and the connection factory</li>
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Queue queue = (Queue)initialContext.lookup("/queue/exampleQueue");
ConnectionFactory cf = (ConnectionFactory)initialContext.lookup("/ConnectionFactory");
</pre>
<li>We create a JMS Connection, Session and a MessageConsumer on the queue</li>
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connection = cf.createConnection();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageConsumer consumer = session.createConsumer(queue);
</pre>
<li>We start the connection</li>
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<code>connection.start();</code>
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<li>We receive the message. Stomp messages are mapped to JMS TextMessage.</li>
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TextMessage messageReceived = (TextMessage)consumer.receive(5000);
System.out.println("Received JMS message: " + messageReceived.getText());
</pre>
<li>And finally, <b>always</b> remember to close your JMS connections and resources after use, in a <code>finally</code> block. Closing a JMS connection will automatically close all of its sessions, consumers, producer and browser objects</li>
<pre class="prettyprint">
<code>finally
{
if (initialContext != null)
{
initialContext.close();
}
if (connection != null)
{
connection.close();
}
}</code>
</pre>
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