| /** |
| * 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.Connection; |
| import javax.jms.ConnectionFactory; |
| import javax.jms.Destination; |
| import javax.jms.JMSException; |
| import javax.jms.MessageProducer; |
| 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; |
| |
| /** |
| * A simple polymorphic JMS producer which can work with Queues or Topics which |
| * uses JNDI to lookup the JMS connection factory and destination |
| * |
| * |
| */ |
| public final class SimpleProducer { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(SimpleProducer.class); |
| |
| private SimpleProducer() { |
| } |
| |
| /** |
| * @param args the destination name to send to and optionally, the number of |
| * messages to send |
| */ |
| public static void main(String[] args) { |
| Context jndiContext = null; |
| ConnectionFactory connectionFactory = null; |
| Connection connection = null; |
| Session session = null; |
| Destination destination = null; |
| MessageProducer producer = null; |
| String destinationName = null; |
| final int numMsgs; |
| |
| if ((args.length < 1) || (args.length > 2)) { |
| LOG.info("Usage: java SimpleProducer <destination-name> [<number-of-messages>]"); |
| System.exit(1); |
| } |
| destinationName = args[0]; |
| LOG.info("Destination name is " + destinationName); |
| if (args.length == 2) { |
| numMsgs = (new Integer(args[1])).intValue(); |
| } else { |
| numMsgs = 1; |
| } |
| |
| /* |
| * Create a JNDI API InitialContext object |
| */ |
| 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 destination. |
| */ |
| try { |
| connectionFactory = (ConnectionFactory)jndiContext.lookup("ConnectionFactory"); |
| destination = (Destination)jndiContext.lookup(destinationName); |
| } 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 { |
| connection = connectionFactory.createConnection(); |
| session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| producer = session.createProducer(destination); |
| TextMessage message = session.createTextMessage(); |
| for (int i = 0; i < numMsgs; i++) { |
| message.setText("This is message " + (i + 1)); |
| LOG.info("Sending message: " + message.getText()); |
| producer.send(message); |
| } |
| |
| /* |
| * Send a non-text control message indicating end of messages. |
| */ |
| producer.send(session.createMessage()); |
| } catch (JMSException e) { |
| LOG.info("Exception occurred: " + e); |
| } finally { |
| if (connection != null) { |
| try { |
| connection.close(); |
| } catch (JMSException e) { |
| } |
| } |
| } |
| } |
| } |
| |
| // END SNIPPET: demo |