Examples of org.hornetq.core.paging.cursor.PagedReference

org.hornetq.core.paging.cursor.PagedReference
A PagedReference @author clebert

      LinkedListIterator<PagedReference> iterator = cursor.iterator();
      
      for (int i = 0 ; i < TOTAL_MSG; i++ )
      {
         assertEquals(0, exceptions.get());
         PagedReference ref = null;
         for (int repeat = 0 ; repeat < 5; repeat++)
         {
            ref = iterator.next();
            if (ref == null)
            {
               Thread.sleep(1000);
            }
            else
            {
               break;
            }
         }
         assertNotNull(ref);
         
         ref.acknowledge();
         assertNotNull(ref);
         
         System.out.println("Consuming " + ref.getMessage().getIntProperty("key"));
         //assertEquals(i, ref.getMessage().getIntProperty("key").intValue());
      }


      assertEquals(0, exceptions.get());
   }

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      System.out.println("Number of pages - " + pageStore.getNumberOfPages());


      // First consume what's already there without any tx as nothing was committed
      for (int i = 300; i < 400; i++)
      {
         PagedReference pos = iterator.next();
         assertNotNull("Null at position " + i, pos);
         assertEquals(i, pos.getMessage().getIntProperty("key").intValue());
         cursor.ack(pos);
      }


      assertNull(iterator.next());


      cursor.printDebug();
 
      txCommit.commit();


      txRollback.rollback();
      
      storage.waitOnOperations();


      // Second:after pgtxCommit was done
      for (int i = 200; i < 300; i++)
      {
         PagedReference pos = iterator.next();
         assertNotNull(pos);
         assertEquals(i, pos.getMessage().getIntProperty("key").intValue());
         cursor.ack(pos);
      }


      assertNull(iterator.next());

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      System.out.println("Number of pages - " + pageStore.getNumberOfPages());


      // First consume what's already there without any tx as nothing was committed
      for (int i = 100; i < 200; i++)
      {
         PagedReference pos = iterator.next();
         assertNotNull("Null at position " + i, pos);
         assertEquals(i, pos.getMessage().getIntProperty("key").intValue());
         cursor.ack(pos);
      }


      assertNull(iterator.next());
      
      txLazy.commit();
      
      storage.waitOnOperations();


      for (int i = 0; i < 100; i++)
      {
         PagedReference pos = iterator.next();
         assertNotNull("Null at position " + i, pos);
         assertEquals(i, pos.getMessage().getIntProperty("key").intValue());
         cursor.ack(pos);
      }


      assertNull(iterator.next());

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      cache = null;


      LinkedListIterator<PagedReference> iterator = cursor.iterator();


      PagedReference msgCursor = null;
      while ((msgCursor = iterator.next()) != null)
      {
         assertEquals(key++, msgCursor.getMessage().getIntProperty("key").intValue());
      }
      assertEquals(NUM_MESSAGES, key);


      server.stop();


      OperationContextImpl.clearContext();


      createServer();


      cursorProvider = lookupCursorProvider();
      cursor = cursorProvider.getSubscription(queue.getID());
      key = initialKey;
      iterator = cursor.iterator();
      while ((msgCursor = iterator.next()) != null)
      {
         assertEquals(key++, msgCursor.getMessage().getIntProperty("key").intValue());
         cursor.ack(msgCursor);
      }


      forceGC();

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      LinkedListIterator<PagedReference> iter2 = cursor.iterator();
      
      assertTrue(iter.hasNext());
      
      PagedReference msg1 = iter.next();
      
      PagedReference msg2 = iter2.next();
      
      assertEquals(tstProperty(msg1.getMessage()), tstProperty(msg2.getMessage()));
      
      System.out.println("property = " + tstProperty(msg1.getMessage()));


      msg1 = iter.next();
      
      assertEquals(1, tstProperty(msg1.getMessage()));
      
      iter.remove();
      
      msg2 = iter2.next();
      
      assertEquals(2, tstProperty(msg2.getMessage()));
      
      iter2.repeat();
      
      msg2 = iter2.next();
      
      assertEquals(2, tstProperty(msg2.getMessage()));
      
      iter2.repeat();
      
      assertEquals(2, tstProperty(msg2.getMessage()));
      
      msg1 = iter.next();
      
      assertEquals(2, tstProperty(msg1.getMessage()));

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      long maxSize = pageSubscription.getPagingStore().getPageSizeBytes();


      // System.out.println("QueueMemorySize before depage = " + queueMemorySize.get());
      while (queueMemorySize.get() < maxSize && pageIterator.hasNext())
      {
         PagedReference reference = pageIterator.next();
         addTail(reference, false);
         pageIterator.remove();
      }
      // System.out.println("QueueMemorySize after depage = " + queueMemorySize.get() + " depaged " + nmessages);

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      public synchronized PagedReference next()
      {


         if (cachedNext != null)
         {
            PagedReference retPos = cachedNext;
            cachedNext = null;
            return retPos;
         }


         try

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      {
         synchronized (PageSubscriptionImpl.this)
         {
            boolean match = false;


            PagedReference message = null;


            PagePosition lastPosition = position;
            PagePosition tmpPosition = position;


            do
            {
               synchronized (redeliveries)
               {
                  PagePosition redelivery = redeliveries.poll();


                  if (redelivery != null)
                  {
                     // There's a redelivery pending, we will get it out of that pool instead
                     isredelivery = true;
                     PagedReference redeliveredMsg = getReference(redelivery);
                     lastRedelivery = redeliveredMsg;


                     return redeliveredMsg;
                  }
                  else

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         if (pageIterator != null)
         {
            // System.out.println("QueueMemorySize before depage = " + queueMemorySize.get());
            while (pageIterator.hasNext())
            {
               PagedReference reference = pageIterator.next();
               pageIterator.remove();
   
               if (filter == null || filter.match(reference.getMessage()))
               {
                  count++;
                  pageSubscription.ack(reference);
               }
               else

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      int depaged = 0;
      while (timeout > System.currentTimeMillis() && queueMemorySize.get() < maxSize && pageIterator.hasNext())
      {
         depaged++;
         PagedReference reference = pageIterator.next();
         if (isTrace)
         {
            log.trace("Depaging reference " + reference + " on queue " + this.getName());
         }
         addTail(reference, false);

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Related Classes of org.hornetq.core.paging.cursor.PagedReference

org.hornetq.core.paging.cursor.impl.PageSubscriptionImpl$CursorIterator

org.hornetq.core.server.impl.QueueImpl

org.hornetq.tests.stress.paging.PageCursorStressTest

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