/* * Copyright (c) 2003 Sun Microsystems, Inc.  All rights reserved.  U.S.  * Government Rights - Commercial software.  Government users are subject  * to the Sun Microsystems, Inc. standard license agreement and  * applicable provisions of the FAR and its supplements.  Use is subject  * to license terms.   *  * This distribution may include materials developed by third parties.  * Sun, Sun Microsystems, the Sun logo, Java and J2EE are trademarks  * or registered trademarks of Sun Microsystems, Inc. in the U.S. and  * other countries.   *  * Copyright (c) 2003 Sun Microsystems, Inc. Tous droits reserves. *  * Droits du gouvernement americain, utilisateurs gouvernementaux - logiciel * commercial. Les utilisateurs gouvernementaux sont soumis au contrat de  * licence standard de Sun Microsystems, Inc., ainsi qu'aux dispositions  * en vigueur de la FAR (Federal Acquisition Regulations) et des  * supplements a celles-ci.  Distribue par des licences qui en  * restreignent l'utilisation. *  * Cette distribution peut comprendre des composants developpes par des  * tierces parties. Sun, Sun Microsystems, le logo Sun, Java et J2EE  * sont des marques de fabrique ou des marques deposees de Sun  * Microsystems, Inc. aux Etats-Unis et dans d'autres pays. */import javax.jms.*;import javax.naming.*;/** * The SimpleClient class sends several messages to a  * destination. */public class SimpleClient {    /**     * Main method.     */    public static void main(String[] args) {        Context                 jndiContext = null;        ConnectionFactory       connectionFactory = null;        Connection              connection = null;        Session                 session = null;        Destination             dest = null;        MessageProducer         producer = null;        TextMessage             message = null;        final int               NUM_MSGS = 3;                        /*          * Create a JNDI API InitialContext object.         */        try {            jndiContext = new InitialContext();        } catch (NamingException e) {            System.out.println("Could not create JNDI API " +                "context: " + e.toString());            System.exit(1);        }        /*          * Look up connection factory and queue.  If either does         * not exist, exit.         */        try {            connectionFactory = (ConnectionFactory)                jndiContext.lookup("java:comp/env/jms/MyConnectionFactory");            dest = (Queue)                 jndiContext.lookup("java:comp/env/jms/QueueName");        } catch (NamingException e) {            System.out.println("JNDI API lookup failed: " +                e.toString());            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.         * Finally, close connection.         */        try {            connection =                 connectionFactory.createConnection();            session = connection.createSession(false,                 Session.AUTO_ACKNOWLEDGE);            producer = session.createProducer(dest);            message = session.createTextMessage();            for (int i = 0; i < NUM_MSGS; i++) {                message.setText("This is message " + (i + 1));                System.out.println("Sending message: " +                     message.getText());                producer.send(message);            }        } catch (JMSException e) {            System.out.println("Exception occurred: " +                 e.toString());        } finally {            if (connection != null) {                try {                    connection.close();                } catch (JMSException e) {}            }            System.exit(0);        }    }}