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< title > ActiveMQ Stomp 1.1 Example< / title >
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< h1 > Stomp 1.2 Example< / h1 >
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< p > This example shows you how to configure ActiveMQ to send and receive Stomp messages using Stomp 1.2 protocol.< / p >
< p > The example will start a ActiveMQ server configured with Stomp and JMS.< / p >
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< p > The client will open a socket to initiate a Stomp 1.2 connection and then 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 >
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< li > We create a TCP socket to connect to the Stomp port
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Socket socket = new Socket("localhost", 61613);
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< li > We negotiate a Stomp 1.2 connection to the server< / li >
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String connectFrame = "CONNECT\n" +
"accept-version:1.1\n" +
"host:localhost\n" +
"login:guest\n" +
"passcode:guest\n" +
"request-id:1\n" +
"\n" +
END_OF_FRAME;
sendFrame(socket, connectFrame);
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< li > We receive a response showing that the connection version< / li >
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String response = receiveFrame(socket);
System.out.println("response: " + response);
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< li > We send a SEND frame (a Stomp message) to the destination < code > jms.queue.exampleQueue< / code >
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(which corresponds to the ActiveMQ address for the JMS Queue < code > exampleQueue< / code > ) with a text body< / li >
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String text = "Hello World from Stomp 1.2 !";
String message = "SEND\n" +
"destination:jms.queue.exampleQueue\n" +
"\n" +
text +
END_OF_FRAME;
sendFrame(socket, message);
System.out.println("Sent Stomp message: " + text);
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< li > We send a DISCONNECT frame to disconnect from the server< / li >
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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");
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< 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);
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< 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());
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< 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 >
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< code > finally
{
if (initialContext != null)
{
initialContext.close();
}
if (connection != null)
{
connection.close();
}
}< / code >
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