Package com.linkedin.databus.core.DbusEventBuffer

Examples of com.linkedin.databus.core.DbusEventBuffer.InternalEventIterator

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        new DbusEventBuffer(TestDbusEventBuffer.getConfig(
            100000, 100000, 100, 500, AllocationPolicy.HEAP_MEMORY, QueuePolicy.OVERWRITE_ON_WRITE,
            AssertLevel.ALL));

    log.info("verify iterators on empty buffers ");
    final InternalEventIterator iter0 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    Assert.assertEquals(iter0.getCurrentPosition(), dbusBuf.getHead());
    Assert.assertEquals(iter0._iteratorTail.getPosition(), dbusBuf.getTail());
    Assert.assertNotNull(iter0.getIdentifier());
    Assert.assertTrue(iter0.getIdentifier().startsWith(InternalEventIterator.class.getSimpleName()));
    Assert.assertTrue(!iter0.hasNext());
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 1);

    log.info("append a full window of events");
    final DbusEventGenerator generator = new DbusEventGenerator();
    final Vector<DbusEvent> events = new Vector<DbusEvent>();
    generator.generateEvents(5, 5, 120, 39, events);
    injectEventsInBuffer(dbusBuf, events, false);

    log.info("verify we can read all events");
    //old iterator has not changed
    Assert.assertTrue(!iter0.hasNext());

    log.info("verify new iterator");
    InternalEventIterator iter1 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    Assert.assertEquals(iter1.getCurrentPosition(), dbusBuf.getHead());
    Assert.assertEquals(iter1._iteratorTail.getPosition(), dbusBuf.getTail());
    Assert.assertNotNull(iter1.getIdentifier());
    Assert.assertTrue(iter1.getIdentifier().startsWith(InternalEventIterator.class.getSimpleName()));
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 2);
    Assert.assertTrue(iter1.hasNext());

    log.info("make sure we can read all events");
    readAndCompareIteratorEvents(iter1, events, false);

    log.info("add more windows");
    final Vector<DbusEvent> events2 = new Vector<DbusEvent>();
    final DbusEventGenerator generator2 = new DbusEventGenerator(1000);
    generator2.generateEvents(50, 4, 180, 100, events2);
    injectEventsInBuffer(dbusBuf, events2, false);

    log.info("verify old iterators have not changed");
    Assert.assertTrue(!iter0.hasNext());
    Assert.assertTrue(!iter1.hasNext());

    log.info("verify new iterator");
    events.addAll(events2);
    InternalEventIterator iter2 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    Assert.assertEquals(iter2.getCurrentPosition(), dbusBuf.getHead());
    Assert.assertEquals(iter2._iteratorTail.getPosition(), dbusBuf.getTail());
    Assert.assertNotNull(iter2.getIdentifier());
    Assert.assertTrue(iter2.getIdentifier().startsWith(InternalEventIterator.class.getSimpleName()));
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 3);
    Assert.assertTrue(iter2.hasNext());

    log.info("make sure we can read all events");
    readAndCompareIteratorEvents(iter2, events, false);

    iter0.close();
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 2);
    iter2.close();
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 1);
    iter1.close();
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 0);
    log.info("done");
  }
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      final Vector<DbusEvent> events1 = new Vector<DbusEvent>();
      generator.generateEvents(6, 1, 120, 41, events1);
      injectEventsInBuffer(dbusBuf, events1, true);

      log.info("get a new iterator");
      InternalEventIterator iter1 =
          dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
      Assert.assertEquals(iter1.getCurrentPosition(), dbusBuf.getHead());
      Assert.assertEquals(iter1._iteratorTail.getPosition(), dbusBuf.getTail());
      Assert.assertTrue(iter1.hasNext());

      log.info("process the last window");
      readAndCompareIteratorEvents(iter1, events1, true);
      iter1.close();
    }

    log.info("done");
  }
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        new DbusEventBuffer(TestDbusEventBuffer.getConfig(
            100000, 400, 100, 500, AllocationPolicy.HEAP_MEMORY, QueuePolicy.BLOCK_ON_WRITE,
            AssertLevel.ALL));

    log.info("verify iterators on empty buffers ");
    final InternalEventIterator iter0 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    Assert.assertEquals(iter0.getCurrentPosition(), dbusBuf.getHead());
    Assert.assertEquals(iter0._iteratorTail.getPosition(), dbusBuf.getTail());
    Assert.assertNotNull(iter0.getIdentifier());
    Assert.assertTrue(iter0.getIdentifier().startsWith(InternalEventIterator.class.getSimpleName()));
    Assert.assertTrue(!iter0.hasNext());
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 1);

    log.info("append a full window of events");
    final DbusEventGenerator generator = new DbusEventGenerator();
    final Vector<DbusEvent> events = new Vector<DbusEvent>();
    generator.generateEvents(5, 5, 120, 39, events);
    injectEventsInBuffer(dbusBuf, events, false);

    log.info("verify we can read all events");
    //old iterator has not changed
    Assert.assertTrue(!iter0.hasNext());

    log.info("verify new iterator");
    InternalEventIterator iter1 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    Assert.assertEquals(iter1.getCurrentPosition(), dbusBuf.getHead());
    Assert.assertEquals(iter1._iteratorTail.getPosition(), dbusBuf.getTail());
    Assert.assertNotNull(iter1.getIdentifier());
    Assert.assertTrue(iter1.getIdentifier().startsWith(InternalEventIterator.class.getSimpleName()));
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 2);
    Assert.assertTrue(iter1.hasNext());

    log.info("make sure we can read all events");
    readAndCompareIteratorEvents(iter1, events, false);

    log.info("add more windows");
    final Vector<DbusEvent> events2 = new Vector<DbusEvent>();
    final DbusEventGenerator generator2 = new DbusEventGenerator(1000);
    generator2.generateEvents(50, 4, 180, 100, events2);
    injectEventsInBuffer(dbusBuf, events2, false);

    log.info("verify old iterators have not changed");
    Assert.assertTrue(!iter0.hasNext());
    Assert.assertTrue(!iter1.hasNext());

    log.info("verify new iterator");
    events.addAll(events2);
    InternalEventIterator iter2 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    Assert.assertEquals(iter2.getCurrentPosition(), dbusBuf.getHead());
    Assert.assertEquals(iter2._iteratorTail.getPosition(), dbusBuf.getTail());
    Assert.assertNotNull(iter2.getIdentifier());
    Assert.assertTrue(iter2.getIdentifier().startsWith(InternalEventIterator.class.getSimpleName()));
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 3);
    Assert.assertTrue(iter2.hasNext());

    log.info("make sure we can read all events");
    readAndCompareIteratorEvents(iter2, events, false);

    iter0.close();
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 2);
    iter2.close();
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 1);
    iter1.close();
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 0);
    log.info("done");
  }
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        new DbusEventBuffer(TestDbusEventBuffer.getConfig(
            100000, 100000, 100, 500, AllocationPolicy.HEAP_MEMORY, QueuePolicy.OVERWRITE_ON_WRITE,
            AssertLevel.ALL));

    log.info("acquire empty iterator on empty buffers ");
    InternalEventIterator iter0 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);

    log.info("append a full window of events");
    final DbusEventGenerator generator = new DbusEventGenerator();
    final Vector<DbusEvent> events = new Vector<DbusEvent>();
    generator.generateEvents(15, 5, 120, 39, events);
    injectEventsInBuffer(dbusBuf, events, false);

    log.info("acquire oterh iterator on empty buffers ");
    //never move this one
    InternalEventIterator iter1 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);

    //move this one a few events
    InternalEventIterator iter2 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    iter2.next();
    iter2.next();
    iter2.next();

    //move this one to the end
    InternalEventIterator iter3 =
        dbusBuf.acquireInternalIterator(dbusBuf.getHead(), dbusBuf.getTail(), null);
    while (iter3.hasNext()) iter3.next();

    log.info("clear up iterators and try to GC");
    Assert.assertEquals(dbusBuf._busyIteratorPool.size(), 4);
    Assert.assertEquals(dbusBuf._rwLockProvider.getNumReaders(), 4);
    iter0 = null;
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Related Classes of com.linkedin.databus.core.DbusEventBuffer.InternalEventIterator

  • com.linkedin.databus.core.TestDbusEventBufferIterators
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