| /** |
| * 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. |
| */ |
| |
| /** |
| * The SimpleQueueSender class consists only of a main method, |
| * which sends several messages to a queue. |
| * |
| * Run this program in conjunction with SimpleQueueReceiver. |
| * Specify a queue name on the command line when you run the |
| * program. By default, the program sends one message. Specify |
| * a number after the queue name to send that number of messages. |
| */ |
| package org.apache.activemq.demo; |
| |
| // START SNIPPET: demo |
| |
| import javax.jms.JMSException; |
| import javax.jms.Queue; |
| import javax.jms.QueueConnection; |
| import javax.jms.QueueConnectionFactory; |
| import javax.jms.QueueSender; |
| import javax.jms.QueueSession; |
| import javax.jms.Session; |
| import javax.jms.TextMessage; |
| import javax.naming.Context; |
| import javax.naming.InitialContext; |
| import javax.naming.NamingException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public final class SimpleQueueSender { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(SimpleQueueSender.class); |
| |
| private SimpleQueueSender() { |
| } |
| |
| /** |
| * Main method. |
| * |
| * @param args the queue used by the example and, optionally, the number of |
| * messages to send |
| */ |
| public static void main(String[] args) { |
| String queueName = null; |
| Context jndiContext = null; |
| QueueConnectionFactory queueConnectionFactory = null; |
| QueueConnection queueConnection = null; |
| QueueSession queueSession = null; |
| Queue queue = null; |
| QueueSender queueSender = null; |
| TextMessage message = null; |
| final int numMsgs; |
| |
| if ((args.length < 1) || (args.length > 2)) { |
| LOG.info("Usage: java SimpleQueueSender " + "<queue-name> [<number-of-messages>]"); |
| System.exit(1); |
| } |
| queueName = args[0]; |
| LOG.info("Queue name is " + queueName); |
| if (args.length == 2) { |
| numMsgs = (new Integer(args[1])).intValue(); |
| } else { |
| numMsgs = 1; |
| } |
| |
| /* |
| * Create a JNDI API InitialContext object if none exists yet. |
| */ |
| try { |
| jndiContext = new InitialContext(); |
| } catch (NamingException e) { |
| LOG.info("Could not create JNDI API context: " + e.toString()); |
| System.exit(1); |
| } |
| |
| /* |
| * Look up connection factory and queue. If either does not exist, exit. |
| */ |
| try { |
| queueConnectionFactory = (QueueConnectionFactory)jndiContext.lookup("QueueConnectionFactory"); |
| queue = (Queue)jndiContext.lookup(queueName); |
| } catch (NamingException e) { |
| LOG.info("JNDI API lookup failed: " + e); |
| System.exit(1); |
| } |
| |
| /* |
| * Create connection. Create session from connection; false means |
| * session is not transacted. Create sender and text message. Send |
| * messages, varying text slightly. Send end-of-messages message. |
| * Finally, close connection. |
| */ |
| try { |
| queueConnection = queueConnectionFactory.createQueueConnection(); |
| queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE); |
| queueSender = queueSession.createSender(queue); |
| message = queueSession.createTextMessage(); |
| for (int i = 0; i < numMsgs; i++) { |
| message.setText("This is message " + (i + 1)); |
| LOG.info("Sending message: " + message.getText()); |
| queueSender.send(message); |
| } |
| |
| /* |
| * Send a non-text control message indicating end of messages. |
| */ |
| queueSender.send(queueSession.createMessage()); |
| } catch (JMSException e) { |
| LOG.info("Exception occurred: " + e.toString()); |
| } finally { |
| if (queueConnection != null) { |
| try { |
| queueConnection.close(); |
| } catch (JMSException e) { |
| } |
| } |
| } |
| } |
| } |
| |
| // END SNIPPET: demo |