Examples of org.apache.flume.Transaction.begin()

org.apache.flume.Transaction.begin()

Starts a transaction boundary for the current channel operation. If a transaction is already in progress, this method will join that transaction using reference counting.

Note: For every invocation of this method there must be a corresponding invocation of {@linkplain #close()} method. Failureto ensure this can lead to dangling transactions and unpredictable results.

    channel.stop();
    channel = createFileChannel();
    channel.start();
    Assert.assertTrue(channel.isOpen());
    transaction = channel.getTransaction();
    transaction.begin();
    Assert.assertNull(channel.take());
    transaction.commit();
    transaction.close();
  }
  @Test

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    fillChannel(channel, "fillup");
    // take an event, roll it back, and
    // then make sure a put fails
    Transaction transaction;
    transaction = channel.getTransaction();
    transaction.begin();
    Event event = channel.take();
    Assert.assertNotNull(event);
    transaction.rollback();
    transaction.close();
    // ensure the take the didn't change the state of the capacity

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    ctx.put(FileChannelConfiguration.CHECKPOINT_DIR,cp);
    ctx.put(FileChannelConfiguration.DATA_DIRS, dataDir.toString());
    channel.configure(ctx);
    channel.start();
    Transaction tx = channel.getTransaction();
    tx.begin();
    int i = 0;
    while(channel.take() != null) {
      i++;
    }
    tx.commit();

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    ctx.put(FileChannelConfiguration.TRANSACTION_CAPACITY, "100");
    channel.configure(ctx);
    channel.start();
    for (int j = 0; j < 5; j++) {
      Transaction tx = channel.getTransaction();
      tx.begin();
      for (int i = 0; i < 5; i++) {
        channel.put(event);
      }
      tx.commit();
      tx.close();

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      syslogSocket.close();
    }


    List<Event> channelEvents = new ArrayList<Event>();
    Transaction txn = channel.getTransaction();
    txn.begin();
    for (int i = 0; i < 10; i++) {
      Event e = channel.take();
      Assert.assertNotNull(e);
      channelEvents.add(e);
    }

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      syslogSocket.close();
    }


    List<Event> channelEvents = new ArrayList<Event>();
    Transaction txn = channel.getTransaction();
    txn.begin();
    for (int i = 0; i < 10; i++) {
      Event e = channel.take();
      Assert.assertNotNull(e);
      channelEvents.add(e);
    }

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    Configurables.configure(channel, context);


    Transaction transaction = channel.getTransaction();
    Assert.assertNotNull(transaction);


    transaction.begin();
    channel.put(event);
    transaction.commit();
    transaction.close();


    transaction = channel.getTransaction();

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      syslogSocket.close();
    }


    List<Event> channelEvents = new ArrayList<Event>();
    Transaction txn = channel.getTransaction();
    txn.begin();
    for (int i = 0; i < 1000; i++) {
      Event e = channel.take();
      if (e == null) {
        throw new NullPointerException("Event is null");
      }

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    transaction.close();


    transaction = channel.getTransaction();
    Assert.assertNotNull(transaction);


    transaction.begin();
    Event event2 = channel.take();
    Assert.assertEquals(event, event2);
    transaction.commit();
  }

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      final int index = i;
      submitterSvc.submit(new Callable<Void>() {
        @Override
        public Void call() {
          Transaction tx = channel.getTransaction();
          tx.begin();
          List<Event> eventsToPut = events.get(index);
          for (int j = 0; j < 10; j++) {
            channel.put(eventsToPut.get(j));
          }
          try {

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