ackequivexample.java

可以和任何语言搭配使用

     */
    public class AsynchSubscriber extends Thread {
        /**
         * Runs the thread.
         */
        public void run() {
            ConnectionFactory connectionFactory = null;
            Connection connection = null;
            Session session = null;
            Topic topic = null;
            MessageConsumer subscriber = null;
            TextListener listener = null;

            /*
             * Look up connection factory and topic.  If either
             * does not exist, exit.
             */
            try {
                connectionFactory =
                    SampleUtilities.getConnectionFactory(conFacName);
                connection = connectionFactory.createConnection();
                session =
                    connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                System.out.println("SUBSCRIBER: Created " +
                    "auto-acknowledge session");
                topic = SampleUtilities.getTopic(topicName, session);
            } catch (Exception e) {
                System.err.println("Connection problem: " + e.toString());

                if (connection != null) {
                    try {
                        connection.close();
                    } catch (JMSException ee) {
                    }
                }

                System.exit(1);
            }

            /*
             * Create auto-acknowledge subscriber.
             * Register message listener (TextListener).
             * Start message delivery.
             * Send synchronize message to publisher, then wait
             *   till all messages have arrived.
             * Listener displays the messages obtained.
             */
            try {
                subscriber = session.createDurableSubscriber(topic, "AckSub");
                listener = new TextListener();
                subscriber.setMessageListener(listener);
                connection.start();

                // Let publisher know that subscriber is ready.
                try {
                    SampleUtilities.sendSynchronizeMessage("SUBSCRIBER: ",
                        CONTROL_QUEUE);
                } catch (Exception e) {
                    System.err.println("Queue probably missing: " +
                        e.toString());

                    if (connection != null) {
                        try {
                            connection.close();
                        } catch (JMSException ee) {
                        }
                    }

                    System.exit(1);
                }

                /*
                 * Asynchronously process messages.
                 * Block until publisher issues a control message
                 * indicating end of publish stream.
                 */
                listener.monitor.waitTillDone();
                subscriber.close();
                session.unsubscribe("AckSub");
            } catch (JMSException e) {
                System.err.println("Exception occurred: " + e.toString());
            } finally {
                if (connection != null) {
                    try {
                        connection.close();
                    } catch (JMSException e) {
                    }
                }
            }
        }

        /**
         * The TextListener class implements the MessageListener
         * interface by defining an onMessage method for the
         * AsynchSubscriber class.
         */
        private class TextListener implements MessageListener {
            final SampleUtilities.DoneLatch monitor =
                new SampleUtilities.DoneLatch();

            /**
             * Casts the message to a TextMessage and displays
             * its text. A non-text message is interpreted as the
             * end of the message stream, and the message
             * listener sets its monitor state to all done
             * processing messages.
             *
             * @param message    the incoming message
             */
            public void onMessage(Message message) {
                if (message instanceof TextMessage) {
                    TextMessage msg = (TextMessage) message;

                    try {
                        System.out.println("SUBSCRIBER: " +
                            "Processing message: " + msg.getText());
                    } catch (JMSException e) {
                        System.err.println("Exception in " + "onMessage(): " +
                            e.toString());
                    }
                } else {
                    monitor.allDone();
                }
            }
        }
    }

    /**
     * The MultiplePublisher class creates a session in
     * AUTO_ACKNOWLEDGE mode and publishes three messages
     * to a topic.
     */
    public class MultiplePublisher extends Thread {
        /**
         * Runs the thread.
         */
        public void run() {
            ConnectionFactory connectionFactory = null;
            Connection connection = null;
            Session session = null;
            Topic topic = null;
            MessageProducer publisher = null;
            TextMessage message = null;
            final int NUMMSGS = 3;
            final String MSG_TEXT =
                new String("Here is an auto-acknowledge message");

            try {
                connectionFactory = SampleUtilities.getConnectionFactory();
                connection = connectionFactory.createConnection();
                session =
                    connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                System.out.println("PUBLISHER: Created " +
                    "auto-acknowledge session");
                topic = SampleUtilities.getTopic(topicName, session);
            } catch (Exception e) {
                System.err.println("Connection problem: " + e.toString());

                if (connection != null) {
                    try {
                        connection.close();
                    } catch (JMSException ee) {
                    }
                }

                System.exit(1);
            }

            /*
             * After synchronizing with subscriber, create
             *   publisher.
             * Send 3 messages, varying text slightly.
             * Send end-of-messages message.
             */
            try {
                /*
                 * Synchronize with subscriber.  Wait for message
                 * indicating that subscriber is ready to receive
                 * messages.
                 */
                try {
                    SampleUtilities.receiveSynchronizeMessages("PUBLISHER: ",
                        CONTROL_QUEUE, 1);
                } catch (Exception e) {
                    System.err.println("Queue probably " + "missing: " +
                        e.toString());

                    if (connection != null) {
                        try {
                            connection.close();
                        } catch (JMSException ee) {
                        }
                    }

                    System.exit(1);
                }

                publisher = session.createProducer(topic);
                message = session.createTextMessage();

                for (int i = 0; i < NUMMSGS; i++) {
                    message.setText(MSG_TEXT + " " + (i + 1));
                    System.out.println("PUBLISHER: Publishing " + "message: " +
                        message.getText());
                    publisher.send(message);
                }

                /*
                 * Send a non-text control message indicating
                 * end of messages.
                 */
                publisher.send(session.createMessage());
            } catch (JMSException e) {
                System.err.println("Exception occurred: " + e.toString());
            } finally {
                if (connection != null) {
                    try {
                        connection.close();
                    } catch (JMSException e) {
                    }
                }
            }
        }
    }
}