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.


    Configurables.configure(source, context);
    source.start();
    Thread.sleep(500);
    Transaction txn = channel.getTransaction();
    txn.begin();
    Event e = channel.take();
    Assert.assertNotNull(e.getHeaders());
    Assert.assertNotNull(e.getHeaders().get("fileHeaderKeyTest"));
    Assert.assertEquals(e.getHeaders().get("fileHeaderKeyTest"),
        f1.getAbsolutePath());

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      int numEvents) throws Exception {
    List<String> result = Lists.newArrayList();
    for (int i = 0; i < numEvents; i += batchSize) {
      for (int j = 0; j < batchSize; j++) {
        Transaction transaction = channel.getTransaction();
        transaction.begin();
        try {
          String s = prefix + "-" + i +"-" + j;
          Event event = EventBuilder.withBody(s.getBytes(Charsets.UTF_8));
          result.add(s);
          channel.put(event);

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    Status status = client.append(avroEvent);


    Assert.assertEquals(Status.OK, status);


    Transaction transaction = channel.getTransaction();
    transaction.begin();


    Event event = channel.take();
    Assert.assertNotNull(event);
    Assert.assertEquals("Channel contained our event", "Hello avro",
        new String(event.getBody()));

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    List<String> bodies = Lists.newArrayList();


    // push the event batches into channel to roll twice
    for (i = 1; i <= rollCount*2/batchSize; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        String body = "Test." + i + "." + j;

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    List<String> bodies = Lists.newArrayList();


    // push the event batches into channel
    for (i = 1; i < 4; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        event.getHeaders().put("timestamp",

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    List<String> bodies = Lists.newArrayList();


    // push the event batches into channel
    for (i = 1; i < 4; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        event.getHeaders().put("timestamp",

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    List<String> bodies = Lists.newArrayList();


    // push the event batches into channel
    for (i = 1; i < numBatches; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        event.getHeaders().put("timestamp",

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    Calendar eventDate = Calendar.getInstance();
    List<String> bodies = Lists.newArrayList();
    // push the event batches into channel
    for (int i = 1; i < 4; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (int j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        event.getHeaders().put("timestamp",

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   */
  public Status process() throws EventDeliveryException {
    Channel channel = getChannel();
    Transaction transaction = channel.getTransaction();
    List<BucketWriter> writers = Lists.newArrayList();
    transaction.begin();
    try {
      int txnEventCount = 0;
      for (txnEventCount = 0; txnEventCount < batchSize; txnEventCount++) {
        Event event = channel.take();
        if (event == null) {

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  public void testCommitAfterNoPutTake() throws Exception {
    channel.start();
    Assert.assertTrue(channel.isOpen());
    Transaction transaction;
    transaction = channel.getTransaction();
    transaction.begin();
    transaction.commit();
    transaction.close();


    // ensure we can reopen log with no error
    channel.stop();

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