Examples of javax.jms.Session

javax.jms.Session
@version $Rev: 46019 $ $Date: 2004-09-14 03:56:06 -0600 (Tue, 14 Sep 2004) $


   public void testReceivedRollbackQueue() throws Exception
   {
      Connection conn = cf.createConnection();


      Session sess = conn.createSession(true, Session.SESSION_TRANSACTED);
      MessageProducer producer = sess.createProducer(queue);
      
      MessageConsumer consumer = sess.createConsumer(queue);
      conn.start();


      
      TextMessage mSent = sess.createTextMessage("igloo");
      producer.send(mSent);
      log.trace("sent1");
      
      sess.commit();
      
      TextMessage mRec = (TextMessage)consumer.receive();
      log.trace("Got 1");
      assertNotNull(mRec);
      assertEquals("igloo", mRec.getText());
      
      sess.commit();
      
      mSent.setText("rollback");
      producer.send(mSent);
      
      sess.commit();
      
      log.trace("Receiving 2");
      mRec = (TextMessage)consumer.receive();
      log.trace("Received 2");
      assertNotNull(mRec);
      assertEquals("rollback", mRec.getText());
            
      sess.rollback();
      
      TextMessage mRec2 = (TextMessage)consumer.receive();
      assertNotNull(mRec2);
      assertEquals("rollback", mRec2.getText());
      
      sess.commit();
      
      assertEquals(mRec.getText(), mRec2.getText());
      
      conn.close();
   }

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   {
      Connection conn = null;
      try
      {
         conn = cf.createConnection("john", "needle");
         Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         sess.createBrowser(testQueue);
      }
      finally
      {
         if (conn != null) conn.close();
      }

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   {
      Connection conn = null;
      try
      {
         conn = cf.createConnection("nobody", "nobody");
         Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         sess.createBrowser(testQueue);
         fail("should throw JMSSecurityException");
      }
      catch (JMSSecurityException e)
      {
         //Expected

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   // Private -------------------------------------------------------


   private boolean canReadDestination(Connection conn, Destination dest) throws Exception
   {
      Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


      try
      {
         sess.createConsumer(dest);
         return true;
      }
      catch (JMSSecurityException e)
      {
         log.trace("Can't read destination");

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   }


   private boolean canWriteDestination(Connection conn, Destination dest) throws Exception
   {
      Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


      boolean namedSucceeded = true;
      try
      {
         MessageProducer prod = sess.createProducer(dest);
         Message m = sess.createTextMessage("Kippers");
         prod.send(m);
      }
      catch (JMSSecurityException e)
      {
         log.trace("Can't write to destination using named producer");
         namedSucceeded = false;
      }


      boolean anonSucceeded = true;
      try
      {
         MessageProducer producerAnon = sess.createProducer(null);
         Message m = sess.createTextMessage("Kippers");
         producerAnon.send(dest, m);
      }
      catch (JMSSecurityException e)
      {
         log.trace("Can't write to destination using named producer");

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   }


   private boolean canCreateDurableSub(Connection conn, Topic topic, String subName) throws Exception
   {


      Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


      try
      {
         MessageConsumer cons = sess.createDurableSubscriber(topic, subName);
         cons.close();
         sess.unsubscribe(subName);
         log.trace("Successfully created and unsubscribed subscription");
         return true;
      }
      catch (JMSSecurityException e)
      {

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      try
      {
         conn = cf.createConnection();
         
         Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         
         MessageProducer prod = sess.createProducer(queue);
         
         final int NUM_MESSAGES = 5;
         
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            TextMessage tm = sess.createTextMessage("message" + i);
            
            prod.send(tm);
         }
         
         Session sess2 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
         
         MessageConsumer cons = sess2.createConsumer(queue);
         
         conn.start();
         
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            TextMessage tm = (TextMessage)cons.receive(500);
            
            assertNotNull(tm);
            
            assertEquals("message" + i, tm.getText());
         }
         
         // Now close the session


         sess2.close();
         
      }
      finally
      {
         if (conn != null)

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   {
      Connection conn = cf.createConnection();


      conn.start();


      final Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


      MessageConsumer cons = sess.createConsumer(queue);


      final Object lock = new Object();


      final int numMessages = 100;




      class MyListener implements MessageListener
      {
         boolean failed;


         int count;


         public void onMessage(Message m)
         {
            try
            {
               MessageProducer prod = sess.createProducer(queue2);


               prod.send(m);


               count++;


               if (count == numMessages)
               {
                  synchronized (lock)
                  {
                     lock.notify();
                  }


               }
            }
            catch (JMSException e)
            {
               failed = true;
            }
         }
      }


      MyListener listener = new MyListener();


      cons.setMessageListener(listener);


      MessageProducer prod = sess.createProducer(queue);


      for (int i = 0; i < numMessages; i++)
      {
         prod.send(sess.createMessage());
      }


      synchronized (lock)
      {
         lock.wait();

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      try
      {
         conn = cf.createConnection();
      
         Session sessSend = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
   
         MessageProducer prod = sessSend.createProducer(queue);
   
         conn.start();
   
         Session sessConsume1 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
   
         MessageConsumer cons1 = sessConsume1.createConsumer(queue);
   
         TextMessage tm = sessSend.createTextMessage();
   
         tm.setText("Your mum");
   
         prod.send(tm);
   
         TextMessage tm2 = (TextMessage)cons1.receive();
   
         assertNotNull(tm2);
   
         assertEquals("Your mum", tm2.getText());
   
         // Don't ack
   
         // Create another consumer
   
         Session sessConsume2 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
   
         MessageConsumer cons2 = sessConsume2.createConsumer(queue);
   
         // this should cancel message and cause delivery to other consumer
   
         log.trace("Closed session 1");
         sessConsume1.close();

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   {
      Connection conn = cf.createConnection();


      conn.setClientID("wibble");


      Session sessSend = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


      MessageProducer prod = sessSend.createProducer(topic);


      conn.start();


      Session sessConsume1 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);


      MessageConsumer cons1 = sessConsume1.createDurableSubscriber(topic, "sub1");


      TextMessage tm = sessSend.createTextMessage();


      tm.setText("Your mum");


      prod.send(tm);


      TextMessage tm2 = (TextMessage)cons1.receive();


      assertNotNull(tm2);


      assertEquals("Your mum", tm2.getText());


      //Don't ack


      //Create another consumer


      Session sessConsume2 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);


      MessageConsumer cons2 = sessConsume2.createDurableSubscriber(topic, "sub1");


      //this should cancel message and cause delivery to other consumer


      sessConsume1.close();

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