Examples of 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)

Examples of javax.jms.TopicPublisher


      // We don't want local messages on this topic.
      TopicSession session1 = topicConnection1.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
      Topic topic = (Topic) context.lookup(TEST_TOPIC);
      TopicSubscriber subscriber1 = session1.createSubscriber(topic, null, true);
      TopicPublisher sender1 = session1.createPublisher(topic);


      //Now a sender
      TopicSession session2 = topicConnection2.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
      TopicPublisher sender2 = session2.createPublisher(topic);


      drainMessagesForTopic(subscriber1);


      //send some messages
      sender1.publish(session1.createTextMessage("Local Message"));
      sender2.publish(session2.createTextMessage("Remote Message"));


      // Get the messages, we should get the remote message
      // but not the local message
      TextMessage msg1 = (TextMessage) subscriber1.receive(2000);
      if (msg1 == null)

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Examples of javax.jms.TopicPublisher

         getLog().debug("Retrieving Topic");
         Topic topic = (Topic) context.lookup(TEST_DURABLE_TOPIC);


         getLog().debug("Creating a send session");
         TopicSession sendSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         TopicPublisher sender = sendSession.createPublisher(topic);


         getLog().debug("Clearing the topic");
         TopicSession subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         TopicSubscriber subscriber = subSession.createDurableSubscriber(topic, "test");
         Message message = subscriber.receive(50);
         while (message != null)
            message = subscriber.receive(50);
         subSession.close();


         getLog().debug("Subscribing to topic, looking for Value = 'A'");
         subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         subscriber = subSession.createDurableSubscriber(topic, "test", "Value = 'A'", false);


         getLog().debug("Send some messages");
         message = sendSession.createTextMessage("Message1");
         message.setStringProperty("Value", "A");
         sender.publish(message);
         message = sendSession.createTextMessage("Message2");
         message.setStringProperty("Value", "A");
         sender.publish(message);
         message = sendSession.createTextMessage("Message3");
         message.setStringProperty("Value", "B");
         sender.publish(message);


         getLog().debug("Retrieving the A messages");
         message = subscriber.receive(2000);
         assertTrue("Expected message 1", message != null);
         assertTrue("Should get an A", message.getStringProperty("Value").equals("A"));
         message = subscriber.receive(2000);
         assertTrue("Expected message 2", message != null);
         assertTrue("Should get a second A", message.getStringProperty("Value").equals("A"));
         assertTrue("That should be it for A", subscriber.receive(2000) == null);


         getLog().debug("Closing the subscriber without acknowledgement");
         subSession.close();


         getLog().debug("Subscribing to topic, looking for Value = 'B'");
         subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         subscriber = subSession.createDurableSubscriber(topic, "test", "Value = 'B'", false);


         getLog().debug("Retrieving the non-existent B messages");
         assertTrue("B should not be there", subscriber.receive(2000) == null);


         getLog().debug("Closing the subscriber.");
         subSession.close();


         getLog().debug("Subscribing to topic, looking for those Value = 'A'");
         subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         subscriber = subSession.createDurableSubscriber(topic, "test", "Value = 'A'", false);
         assertTrue("Should not be any A the subscription was changed", subscriber.receive(2000) == null);
         subSession.close();


         getLog().debug("Subscribing to topic, looking for everything");
         subSession = topicConnection.createTopicSession(false, Session.CLIENT_ACKNOWLEDGE);
         subscriber = subSession.createDurableSubscriber(topic, "test", null, false);


         message = sendSession.createTextMessage("Message4");
         message.setStringProperty("Value", "A");
         sender.publish(message);


         message = subscriber.receive(2000);
         assertTrue("Expected message 4", message != null);
         assertTrue("Should be an A which we don't acknowledge", message.getStringProperty("Value").equals("A"));
         subSession.close();

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Examples of javax.jms.TopicPublisher

         getLog().debug("Retrieving Topic");
         Topic topic = (Topic) context.lookup(TEST_DURABLE_TOPIC);


         getLog().debug("Creating a send session");
         TopicSession sendSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         TopicPublisher sender = sendSession.createPublisher(topic);


         getLog().debug("Clearing the topic");
         TopicSession subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         TopicSubscriber subscriber = subSession.createDurableSubscriber(topic, "test");
         TextMessage message = (TextMessage) subscriber.receive(50);
         while (message != null)
            message = (TextMessage) subscriber.receive(50);
         subSession.close();


         getLog().debug("Subscribing to topic, with null selector");
         subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         subscriber = subSession.createDurableSubscriber(topic, "test", null, false);


         getLog().debug("Send a message");
         message = sendSession.createTextMessage("Message1");
         sender.publish(message);


         getLog().debug("Retrieving the message");
         message = (TextMessage) subscriber.receive(2000);
         assertTrue("Expected message 1", message != null);
         assertTrue("Should get Message1", message.getText().equals("Message1"));
         getLog().debug("Closing the subscriber");
         subSession.close();


         getLog().debug("Subscribing to topic, with an empty selector");
         subSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
         subscriber = subSession.createDurableSubscriber(topic, "test", "   ", false);


         getLog().debug("Send a message");
         message = sendSession.createTextMessage("Message2");
         sender.publish(message);


         getLog().debug("Retrieving the message");
         message = (TextMessage) subscriber.receive(2000);
         assertTrue("Expected message 2", message != null);
         assertTrue("Should get Message2", message.getText().equals("Message2"));

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Examples of javax.jms.TopicPublisher

            TopicSession session = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
            TopicSubscriber topicSubscriber = session.createSubscriber(topic);
            TestListener test = new TestListener();
            topicSubscriber.setMessageListener(test);
            connection.start();
            TopicPublisher topicPublisher = session.createPublisher(topic);
            TextMessage tmsg = session.createTextMessage("JMS - Test Topic Message");
            topicPublisher.publish(tmsg);
            if ( msg != null ) {
                out.println("<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>");
                out.println("<head><title>JMS Topic Sender Receiver</title></head>");
                out.println("<body>Received JMS Topic Message</body></html>");
            }

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Examples of javax.jms.TopicPublisher

            connection.start();


            // Send messages which don't match and do match the selector, checking message count
            TopicSession pubSession = connection.createTopicSession(true, Session.SESSION_TRANSACTED);
            Topic topic = pubSession.createTopic(SELECTOR_TOPIC_NAME);
            TopicPublisher publisher = pubSession.createPublisher(topic);


            publishMessages(pubSession, publisher, topic, DeliveryMode.PERSISTENT, 1*1024, 1, "false");
            pubSession.commit();
            assertEquals("DurableSubscription backing queue should still have 1 message on it",
                         Integer.valueOf(1), dursubQueue.getMessageCount());

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Examples of javax.jms.TopicPublisher

            connection.start();


            // Send new message matching the topic, checking message count
            TopicSession session = connection.createTopicSession(true, Session.SESSION_TRANSACTED);
            Topic topic = session.createTopic(TOPIC_NAME);
            TopicPublisher publisher = session.createPublisher(topic);


            publishMessages(session, publisher, topic, DeliveryMode.PERSISTENT, 1*1024, 1, "indifferent");
            session.commit();
            assertEquals("DurableSubscription backing queue should now have 2 messages on it",
                        Integer.valueOf(2), dursubQueue.getMessageCount());

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Examples of javax.jms.TopicPublisher


        // Create a publisher and send a persistent message which matches the selector
        // followed by one that does not match, and another which matches but is not
        // committed and so should be 'lost'
        TopicSession pubSession = connection.createTopicSession(true, Session.SESSION_TRANSACTED);
        TopicPublisher publisher = pubSession.createPublisher(topic);


        publishMessages(pubSession, publisher, topic, DeliveryMode.PERSISTENT, 1*1024, 1, "true");
        publishMessages(pubSession, publisher, topic, DeliveryMode.PERSISTENT, 1*1024, 1, "false");
        pubSession.commit();
        publishMessages(pubSession, publisher, topic, DeliveryMode.PERSISTENT, 1*1024, 1, "true");


        publisher.close();
        pubSession.close();
        connection.close();
    }

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Examples of javax.jms.TopicPublisher


        AMQConnection con = (AMQConnection) getConnection("guest", "guest");
        AMQTopic topic = new AMQTopic(con.getDefaultTopicExchangeName(), "MyTopic");
        TopicSession session1 = con.createTopicSession(true, AMQSession.NO_ACKNOWLEDGE);
        TopicSubscriber sub = session1.createDurableSubscriber(topic, "subscription0");
        TopicPublisher publisher = session1.createPublisher(topic);


        con.start();


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


        tm = (TextMessage) sub.receive(2000);
        assertNotNull(tm);
        session1.commit();

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Examples of javax.jms.TopicPublisher

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


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


        con.start();


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


        if (shutdown)
        {
            session1.close();
            con.close();
            con =  (AMQConnection) getConnection("guest", "guest");
            con.start();
            session1 = con.createTopicSession(true, AMQSession.NO_ACKNOWLEDGE);
            publisher = session1.createPublisher(null);
        }
        sub.close();
        TopicSubscriber sub2 = session1.createDurableSubscriber(topic2, "subscription0");
        publisher.publish(topic, session1.createTextMessage("hello"));
        session1.commit();
        if (!shutdown)
        {
            m = (TextMessage) sub2.receive(2000);
            assertNull(m);
            session1.commit();
        }
        publisher.publish(topic2, session1.createTextMessage("goodbye"));
        session1.commit();
        m = (TextMessage) sub2.receive(2000);
        assertNotNull(m);
        assertEquals("goodbye", m.getText());
        session1.unsubscribe("subscription0");

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Examples of javax.jms.TopicPublisher

    {
        AMQConnection con1 = (AMQConnection) getClientConnection("guest", "guest", "clientid");
        AMQTopic topic = new AMQTopic(con1, "MyTopic3");


        TopicSession session1 = con1.createTopicSession(true, AMQSession.AUTO_ACKNOWLEDGE);
        TopicPublisher publisher = session1.createPublisher(topic);


        AMQConnection con2 = (AMQConnection) getClientConnection("guest", "guest", "clientid");
        TopicSession session2 = con2.createTopicSession(true, AMQSession.AUTO_ACKNOWLEDGE);
        TopicSubscriber sub = session2.createDurableSubscriber(topic, "subscription0");


        con2.start();


        publisher.publish(session1.createTextMessage("Hello"));
        session1.commit();
        TextMessage tm = (TextMessage) sub.receive(2000);
        session2.commit();
        assertNotNull(tm);
        con2.close();
        publisher.publish(session1.createTextMessage("Hello2"));
        session1.commit();
        con2 =  (AMQConnection) getClientConnection("guest", "guest", "clientid");
        session2 = con2.createTopicSession(true, AMQSession.NO_ACKNOWLEDGE);
        sub = session2.createDurableSubscriber(topic, "subscription0");
        con2.start();

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