Java Transaction類代碼示例

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testPut2() throws Exception {
  Transaction transaction = channel.getTransaction();
  transaction.begin();
  channel.put(events.get(0));
  transaction.rollback();

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        channel.put(events.get(0));
      }
    });

  transaction.close();

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        channel.put(events.get(0));
      }
    });
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testPutCheckpointCommitCheckpointReplay() throws Exception {
  Map<String, String> overrides = Maps.newHashMap();
  overrides.put(FileChannelConfiguration.CAPACITY, String.valueOf(2));
  overrides.put(FileChannelConfiguration.TRANSACTION_CAPACITY,
      String.valueOf(2));
  overrides.put(FileChannelConfiguration.CHECKPOINT_INTERVAL, "10000");
  FileChannel channel = createFileChannel(overrides);
  channel.start();
  //Force a checkpoint by committing a transaction
  Transaction tx = channel.getTransaction();
  Set<String> in = putWithoutCommit(channel, tx, "doubleCheckpoint", 1);
  forceCheckpoint(channel);
  tx.commit();
  tx.close();
  forceCheckpoint(channel);
  channel.stop();

  channel = createFileChannel(overrides);
  channel.start();
  Assert.assertTrue(channel.isOpen());
  Set<String> out = takeEvents(channel, 5);
  compareInputAndOut(in, out);
  channel.stop();
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
public static int remaining(Channel ch) throws EventDeliveryException {
  Transaction t = ch.getTransaction();
  try {
    t.begin();
    int count = 0;
    while (ch.take() != null) {
      count += 1;
    }
    t.commit();
    return count;
  } catch (Throwable th) {
    t.rollback();
    Throwables.propagateIfInstanceOf(th, Error.class);
    Throwables.propagateIfInstanceOf(th, EventDeliveryException.class);
    throw new EventDeliveryException(th);
  } finally {
    t.close();
  }
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testCommit2() throws Exception {
  final Transaction transaction = channel.getTransaction();

  transaction.begin();
  transaction.rollback();

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        transaction.commit();
      }
    });

  transaction.close();

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        transaction.commit();
      }
    });
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testClose1() throws Exception {
  final Transaction transaction = channel.getTransaction();

  testError(new Runnable() {
      @Override
      public void run() {
        transaction.close();
      }
    });

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        transaction.close();
      }
    });
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testClose2() throws Exception {
  final Transaction transaction = channel.getTransaction();

  testRuntimeException(new Runnable() {
      @Override
      public void run() {
        transaction.close();
      }
    });

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        transaction.close();
      }
    });
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testClose5() throws Exception {
  final Transaction transaction = channel.getTransaction();
  transaction.begin();

  testChannelException(new Runnable() {
      @Override
      public void run() {
        transaction.commit();
      }
    });

  testIllegalState(new Runnable() {
      @Override
      public void run() {
        transaction.close();
      }
    });
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
private void commitPutsToOverflow_core(Transaction overflowPutTx)
    throws InterruptedException {
  // reattempt only once if overflow is full first time around
  for (int i = 0; i < 2; ++i) {
    try {
      synchronized (queueLock) {
        overflowPutTx.commit();
        drainOrder.putOverflow(putList.size());
        channelCounter.setChannelSize(memQueue.size()
            + drainOrder.overflowCounter);
        break;
      }
    } catch (ChannelFullException e) { // drop lock & reattempt
      if (i == 0) {
        Thread.sleep(overflowTimeout * 1000);
      } else {
        throw e;
      }
    }
  }
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testCapacityBufferEmptyingAfterRollback() {
  Context context = new Context();
  Map<String, String> parms = new HashMap<String, String>();
  parms.put("capacity", "3");
  parms.put("transactionCapacity", "3");
  context.putAll(parms);
  Configurables.configure(channel,  context);

  Transaction tx = channel.getTransaction();
  tx.begin();
  channel.put(EventBuilder.withBody("test".getBytes()));
  channel.put(EventBuilder.withBody("test".getBytes()));
  channel.put(EventBuilder.withBody("test".getBytes()));
  tx.rollback();
  tx.close();

  tx = channel.getTransaction();
  tx.begin();
  channel.put(EventBuilder.withBody("test".getBytes()));
  channel.put(EventBuilder.withBody("test".getBytes()));
  channel.put(EventBuilder.withBody("test".getBytes()));
  tx.commit();
  tx.close();
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testNullEmptyEvent() {
  Context context = new Context();
  Map<String, String> parms = new HashMap<String, String>();
  parms.put("byteCapacity", "2000");
  parms.put("byteCapacityBufferPercentage", "20");
  context.putAll(parms);
  Configurables.configure(channel,  context);

  Transaction tx = channel.getTransaction();
  tx.begin();
  //This line would cause a NPE without FLUME-1622.
  channel.put(EventBuilder.withBody(null));
  tx.commit();
  tx.close();

  tx = channel.getTransaction();
  tx.begin();
  channel.put(EventBuilder.withBody(new byte[0]));
  tx.commit();
  tx.close();


}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testLayout() throws IOException {
  configureSource();
  props.put("log4j.appender.out2.layout", "org.apache.log4j.PatternLayout");
  props.put("log4j.appender.out2.layout.ConversionPattern",
      "%-5p [%t]: %m%n");
  PropertyConfigurator.configure(props);
  Logger logger = LogManager.getLogger(TestLog4jAppender.class);
  Thread.currentThread().setName("Log4jAppenderTest");
  for (int count = 0; count <= 100; count++) {
    /*
     * Log4j internally defines levels as multiples of 10000. So if we
     * create levels directly using count, the level will be set as the
     * default.
     */
    int level = ((count % 5) + 1) * 10000;
    String msg = "This is log message number" + String.valueOf(count);

    logger.log(Level.toLevel(level), msg);
    Transaction transaction = ch.getTransaction();
    transaction.begin();
    Event event = ch.take();
    Assert.assertNotNull(event);
    StringBuilder builder = new StringBuilder();
    builder.append("[").append("Log4jAppenderTest").append("]: ")
        .append(msg);
    //INFO seems to insert an extra space, so lets split the string.
    String eventBody = new String(event.getBody(), "UTF-8");
    String eventLevel = eventBody.split("\\s+")[0];
    Assert.assertEquals(Level.toLevel(level).toString(), eventLevel);
    Assert.assertEquals(
        new String(event.getBody(), "UTF8").trim()
            .substring(eventLevel.length()).trim(), builder.toString());

    Map<String, String> hdrs = event.getHeaders();

    Assert.assertNotNull(hdrs.get(Log4jAvroHeaders.TIMESTAMP.toString()));

    Assert.assertEquals(Level.toLevel(level),
        Level.toLevel(Integer.parseInt(hdrs.get(Log4jAvroHeaders.LOG_LEVEL
            .toString()))));

    Assert.assertEquals(logger.getName(),
        hdrs.get(Log4jAvroHeaders.LOGGER_NAME.toString()));

    Assert.assertEquals("UTF8",
        hdrs.get(Log4jAvroHeaders.MESSAGE_ENCODING.toString()));
    transaction.commit();
    transaction.close();
  }


}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testAppend() throws Exception {
  client = RpcClientFactory.getThriftInstance(props);
  Context context = new Context();
  channel.configure(context);
  configureSource();
  context.put(ThriftSource.CONFIG_BIND, "0.0.0.0");
  context.put(ThriftSource.CONFIG_PORT, String.valueOf(port));
  Configurables.configure(source, context);
  source.start();
  for (int i = 0; i < 30; i++) {
    client.append(EventBuilder.withBody(String.valueOf(i).getBytes()));
  }
  Transaction transaction = channel.getTransaction();
  transaction.begin();

  for (int i = 0; i < 30; i++) {
    Event event = channel.take();
    Assert.assertNotNull(event);
    Assert.assertEquals(String.valueOf(i), new String(event.getBody()));
  }
  transaction.commit();
  transaction.close();
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testSourceCounter() throws Exception {
  init("true");

  source.start();
  DatagramPacket datagramPacket = createDatagramPacket("test".getBytes());
  sendDatagramPacket(datagramPacket);

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

  channel.take();
  commitAndCloseTransaction(txn);

  // Retrying up to 10 times while the acceptedCount == 0 because the event processing in
  // SyslogUDPSource is handled on a separate thread by Netty so message delivery,
  // thus the sourceCounter's increment can be delayed resulting in a flaky test
  for (int i = 0; i < 10 && source.getSourceCounter().getEventAcceptedCount() == 0; i++) {
    Thread.sleep(100);
  }

  Assert.assertEquals(1, source.getSourceCounter().getEventAcceptedCount());
  Assert.assertEquals(1, source.getSourceCounter().getEventReceivedCount());
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testSimpleUTF16() throws IOException, InterruptedException {

  StringEntity input = new StringEntity("[{\"headers\":{\"a\": \"b\"},\"body\": \"random_body\"},"
          + "{\"headers\":{\"e\": \"f\"},\"body\": \"random_body2\"}]", "UTF-16");
  input.setContentType("application/json; charset=utf-16");
  postRequest.setEntity(input);

  HttpResponse response = httpClient.execute(postRequest);

  Assert.assertEquals(HttpServletResponse.SC_OK,
          response.getStatusLine().getStatusCode());
  Transaction tx = channel.getTransaction();
  tx.begin();
  Event e = channel.take();
  Assert.assertNotNull(e);
  Assert.assertEquals("b", e.getHeaders().get("a"));
  Assert.assertEquals("random_body", new String(e.getBody(), "UTF-16"));

  e = channel.take();
  Assert.assertNotNull(e);
  Assert.assertEquals("f", e.getHeaders().get("e"));
  Assert.assertEquals("random_body2", new String(e.getBody(), "UTF-16"));
  tx.commit();
  tx.close();
}
 

import org.apache.flume.Transaction; //導入依賴的package包/類
@Test
public void testSingleEvent() throws Exception {
  StringEntity input = new StringEntity("[{\"headers\" : {\"a\": \"b\"},\"body\":"
          + " \"random_body\"}]");
  input.setContentType("application/json");
  postRequest.setEntity(input);

  httpClient.execute(postRequest);
  Transaction tx = channel.getTransaction();
  tx.begin();
  Event e = channel.take();
  Assert.assertNotNull(e);
  Assert.assertEquals("b", e.getHeaders().get("a"));
  Assert.assertEquals("random_body", new String(e.getBody(),"UTF-8"));
  tx.commit();
  tx.close();
}