/*
* 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.activemq.artemis.jms.example;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.MessageConsumer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.naming.InitialContext;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
/**
* An example where a Stomp 1.2 client sends a message on a TCP socket
* and consumes it from a JMS MessageConsumer.
*/
public class StompExample {
private static final String END_OF_FRAME = "\u0000";
public static void main(final String[] args) throws Exception {
Connection connection = null;
InitialContext initialContext = null;
try {
// Step 1. Create a TCP socket to connect to the Stomp port
Socket socket = new Socket("localhost", 61613);
// Step 2. Send a CONNECT frame to connect to the server
String connectFrame = "CONNECT\n" +
"accept-version:1.2\n" +
"host:localhost\n" +
"login:guest\n" +
"passcode:guest\n" +
"request-id:1\n" +
"\n" +
END_OF_FRAME;
sendFrame(socket, connectFrame);
String response = receiveFrame(socket);
System.out.println("response: " + response);
// Step 3. Send a SEND frame (a Stomp message) to the
// jms.queue.exampleQueue address with a text body
String text = "Hello World from Stomp 1.2 !";
String message = "SEND\n" +
"destination:exampleQueue\n" +
"\n" +
text +
END_OF_FRAME;
sendFrame(socket, message);
System.out.println("Sent Stomp message: " + text);
// Step 4. Send a DISCONNECT frame to disconnect from the server
String disconnectFrame = "DISCONNECT\n" +
"\n" +
END_OF_FRAME;
sendFrame(socket, disconnectFrame);
// Step 5. Slose the TCP socket
socket.close();
// We will now consume from JMS the message sent with Stomp.
// Step 6. Create an initial context to perform the JNDI lookup.
initialContext = new InitialContext();
// Step 7. Perform a lookup on the queue and the connection factory
Queue queue = (Queue) initialContext.lookup("queue/exampleQueue");
ConnectionFactory cf = (ConnectionFactory) initialContext.lookup("ConnectionFactory");
// Step 8.Create a JMS Connection, Session and a MessageConsumer on the queue
connection = cf.createConnection();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageConsumer consumer = session.createConsumer(queue);
// Step 9. Start the Connection
connection.start();
// Step 10. Receive the message
TextMessage messageReceived = (TextMessage) consumer.receive(5000);
System.out.println("Received JMS message: " + messageReceived.getText());
} finally {
// Step 11. Be sure to close our JMS resources!
if (initialContext != null) {
initialContext.close();
}
if (connection != null) {
connection.close();
}
}
}
private static void sendFrame(Socket socket, String data) throws Exception {
byte[] bytes = data.getBytes(StandardCharsets.UTF_8);
OutputStream outputStream = socket.getOutputStream();
for (int i = 0; i < bytes.length; i++) {
outputStream.write(bytes[i]);
}
outputStream.flush();
}
private static String receiveFrame(Socket socket) throws Exception {
InputStream inputStream = socket.getInputStream();
byte[] buffer = new byte[1024];
int size = inputStream.read(buffer);
byte[] data = new byte[size];
System.arraycopy(buffer, 0, data, 0, size);
String frame = new String(data, StandardCharsets.UTF_8);
return frame;
}
}