Examples of javax.jms.TopicPublisher

javax.jms.TopicPublisher
A client uses a TopicPublisher object to publish messages on a topic. A TopicPublisher object is the publish-subscribe form of a message producer.
Normally, the Topic is specified when a TopicPublisher is created. In this case, an attempt to use the publish methods for an unidentified TopicPublisher will throw a java.lang.UnsupportedOperationException.
If the TopicPublisher is created with an unidentified Topic, an attempt to use the publish methods that assume that the Topic has been identified will throw a java.lang.UnsupportedOperationException.
During the execution of its publish method, a message must not be changed by other threads within the client. If the message is modified, the result of the publish is undefined.
After publishing a message, a client may retain and modify it without affecting the message that has been published. The same message object may be published multiple times.
The following message headers are set as part of publishing a message: JMSDestination, JMSDeliveryMode, JMSExpiration, JMSPriority, JMSMessageID and JMSTimeStamp. When the message is published, the values of these headers are ignored. After completion of the publish, the headers hold the values specified by the method publishing the message. It is possible for the publish method not to set JMSMessageID and JMSTimeStamp if the setting of these headers is explicitly disabled by the MessageProducer.setDisableMessageID or MessageProducer.setDisableMessageTimestamp method.
Creating a MessageProducer provides the same features as creating a TopicPublisher. A MessageProducer object is recommended when creating new code. The TopicPublisher is provided to support existing code.
Because TopicPublisher inherits from MessageProducer, it inherits the send methods that are a part of the MessageProducer interface. Using the send methods will have the same effect as using the publish methods: they are functionally the same. @see Session#createProducer(Destination) @see TopicSession#createPublisher(Topic)

            javax.naming.Context ctx = new InitialContext(props);
            TopicConnectionFactory factory = (TopicConnectionFactory) ctx.lookup("ConnectionFactory");
            TopicConnection conn = factory.createTopicConnection();
            Topic topic = (Topic) ctx.lookup("topicName");
            TopicSession session = conn.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
            TopicPublisher publisher = session.createPublisher(topic);
            if (message != null) {
                Message msg = session.createTextMessage(message);
                publisher.send(msg);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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        public void run(){
            TopicConnectionFactory topicConnectionFactory = null;
            TopicConnection topicConnection = null;
            TopicSession topicSession = null;
            Topic topic = null;
            TopicPublisher topicPublisher = null;
            Message message = null;
            
            topicConnectionFactory = new ActiveMQConnectionFactory(CONNECTION_URL);
            try {
                topic = new ActiveMQTopic(TOPIC_NAME);
                topicConnection = topicConnectionFactory.createTopicConnection();
                topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
                topicPublisher = topicSession.createPublisher(topic);
                message = topicSession.createMessage();
            } catch (Exception ex) {
                exceptions.add(ex);
            }
            while (shouldPublish) {
                try {
                    topicPublisher.publish(message, DeliveryMode.PERSISTENT, 1, 2 * 60 * 60 * 1000);
                } catch (JMSException ex) {
                    exceptions.add(ex);
                }
                try {
                    Thread.sleep(1);

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    {
        AMQConnection connection = new AMQConnection(_connectionString, "guest", "guest", "Client", "test");


        Topic destination1 = new AMQTopic(connection, "t1");
        TopicSession session1 = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        TopicPublisher pub = session1.createPublisher(destination1);
        connection.close();
        try
        {
            pub.getDeliveryMode();
            fail("Expected exception not thrown");
        }
        catch (javax.jms.IllegalStateException e)
        {
            // PASS

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        AMQConnection con = new AMQConnection(BROKER+"?retries='0'", "guest", "guest", "test", "test");
        AMQTopic topic = new AMQTopic(con.getDefaultTopicExchangeName(), "MyTopic");
        TopicSession session1 = con.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicSubscriber sub = session1.createDurableSubscriber(topic, "subscription0");
        TopicPublisher publisher = session1.createPublisher(topic);


        con.start();


        TextMessage tm = session1.createTextMessage("Hello");
        publisher.publish(tm);


        tm = (TextMessage) sub.receive(2000);
        assertNotNull(tm);


        session1.unsubscribe("subscription0");

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        AMQTopic topic = new AMQTopic(con, "MyTopic1" + String.valueOf(shutdown));
        AMQTopic topic2 = new AMQTopic(con, "MyOtherTopic1" + String.valueOf(shutdown));


        TopicSession session1 = con.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicSubscriber sub = session1.createDurableSubscriber(topic, "subscription0");
        TopicPublisher publisher = session1.createPublisher(null);


        con.start();


        publisher.publish(topic, session1.createTextMessage("hello"));
        TextMessage m = (TextMessage) sub.receive(2000);
        assertNotNull(m);


        if (shutdown)
        {
            session1.close();
            con.close();
            con = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test", "test");
            con.start();
            session1 = con.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
            publisher = session1.createPublisher(null);
        }
        TopicSubscriber sub2 = session1.createDurableSubscriber(topic2, "subscription0");
        publisher.publish(topic, session1.createTextMessage("hello"));
        if (!shutdown)
        {
            m = (TextMessage) sub.receive(2000);
            assertNull(m);
        }
        publisher.publish(topic2, session1.createTextMessage("goodbye"));
        m = (TextMessage) sub2.receive(2000);
        assertNotNull(m);
        assertEquals("goodbye", m.getText());
        con.close();
    }

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    {
        AMQConnection con1 = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test", "test");
        AMQTopic topic = new AMQTopic(con1, "MyTopic3");


        TopicSession session1 = con1.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicPublisher publisher = session1.createPublisher(topic);


        AMQConnection con2 = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test2", "test");
        TopicSession session2 = con2.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicSubscriber sub = session2.createDurableSubscriber(topic, "subscription0");


        con2.start();


        publisher.publish(session1.createTextMessage("Hello"));
        TextMessage tm = (TextMessage) sub.receive(2000);
        assertNotNull(tm);
        con2.close();
        publisher.publish(session1.createTextMessage("Hello2"));
        con2 = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test2", "test");
        session2 = con2.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        sub = session2.createDurableSubscriber(topic, "subscription0");
        con2.start();
        tm = (TextMessage) sub.receive(2000);

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    {


        AMQConnection con = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test", "test");
        AMQTopic topic = new AMQTopic(con, "MyTopic4");
        TopicSession session1 = con.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicPublisher publisher = session1.createPublisher(topic);
        MessageConsumer consumer1 = session1.createConsumer(topic);
        con.start();
        TextMessage tm = session1.createTextMessage("Hello");
        publisher.publish(tm);
        tm = (TextMessage) consumer1.receive(200000L);
        assertNotNull(tm);
        String msgText = tm.getText();
        assertEquals("Hello", msgText);
        tm = session1.createTextMessage();
        msgText = tm.getText();
        assertNull(msgText);
        publisher.publish(tm);
        tm = (TextMessage) consumer1.receive(20000000L);
        assertNotNull(tm);
        msgText = tm.getText();
        assertNull(msgText);
        tm.clearBody();
        tm.setText("Now we are not null");
        publisher.publish(tm);
        tm = (TextMessage) consumer1.receive(2000);
        assertNotNull(tm);
        msgText = tm.getText();
        assertEquals("Now we are not null", msgText);


        tm = session1.createTextMessage("");
        msgText = tm.getText();
        assertEquals("Empty string not returned", "", msgText);
        publisher.publish(tm);
        tm = (TextMessage) consumer1.receive(2000);
        assertNotNull(tm);
        assertEquals("Empty string not returned", "", msgText);
        con.close();
    }

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    {
        AMQConnection conn = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test", "test");
        TopicSession session = conn.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        TemporaryTopic topic = session.createTemporaryTopic();
        assertNotNull(topic);
        TopicPublisher producer = session.createPublisher(topic);
        MessageConsumer consumer = session.createConsumer(topic);
        conn.start();
        TextMessage sentMessage = session.createTextMessage("Test Message");
        producer.send(sentMessage);
        TextMessage receivedMessage = (TextMessage) consumer.receive(2000);
        assertNotNull(receivedMessage);
        assertEquals(sentMessage.getText(), receivedMessage.getText());
        producer.send(sentMessage);
        receivedMessage = (TextMessage) consumer.receive(2000);
        assertNotNull(receivedMessage);
        assertEquals(sentMessage.getText(), receivedMessage.getText());


        conn.close();

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    {
        AMQConnection conn = new AMQConnection("vm://:1?retries='0'", "guest", "guest", "test", "test");
        TopicSession session = conn.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        TemporaryTopic topic = session.createTemporaryTopic();
        assertNotNull(topic);
        TopicPublisher producer = session.createPublisher(topic);
        MessageConsumer consumer = session.createConsumer(topic);
        conn.start();
        producer.send(session.createTextMessage("hello"));
        TextMessage tm = (TextMessage) consumer.receive(2000);
        assertNotNull(tm);
        assertEquals("hello", tm.getText());


        try

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        TopicSession session1 = con.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicSubscriber noLocal = session1.createDurableSubscriber(topic, "noLocal", "", true);
        TopicSubscriber select = session1.createDurableSubscriber(topic, "select", "Selector = 'select'", false);
        TopicSubscriber normal = session1.createDurableSubscriber(topic, "normal");


        TopicPublisher publisher = session1.createPublisher(topic);


        con.start();
        TextMessage m;
        TextMessage message;


        //send message to all consumers
        publisher.publish(session1.createTextMessage("hello-new2"));


        //test normal subscriber gets message
        m = (TextMessage) normal.receive(5000);
        assertNotNull(m);


        //test selector subscriber doesn't message
        m = (TextMessage) select.receive(2000);
        assertNull(m);


        //test nolocal subscriber doesn't message
        m = (TextMessage) noLocal.receive(2000);
        if (m != null)
        {
            System.out.println("Message:" + m.getText());
        }
        assertNull(m);


        //send message to all consumers
         message = session1.createTextMessage("hello2");
        message.setStringProperty("Selector", "select");


        publisher.publish(message);


        //test normal subscriber gets message
        m = (TextMessage) normal.receive(5000);
        assertNotNull(m);


        //test selector subscriber does get message
        m = (TextMessage) select.receive(2000);
        assertNotNull(m);


        //test nolocal subscriber doesn't message
        m = (TextMessage) noLocal.receive(1000);
        assertNull(m);


        AMQConnection con2 = new AMQConnection(BROKER + "?retries='0'", "guest", "guest", "test2", "test");
        TopicSession session2 = con2.createTopicSession(false, AMQSession.NO_ACKNOWLEDGE);
        TopicPublisher publisher2 = session2.createPublisher(topic);




        message = session2.createTextMessage("hello2");
        message.setStringProperty("Selector", "select");


        publisher2.publish(message);


        //test normal subscriber gets message
        m = (TextMessage) normal.receive(2000);
        assertNotNull(m);

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