本文整理了Java中org.apache.samza.zk.ZkLeaderElector.amILeader()方法的一些代码示例，展示了ZkLeaderElector.amILeader()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ZkLeaderElector.amILeader()方法的具体详情如下：
包路径：org.apache.samza.zk.ZkLeaderElector
类名称：ZkLeaderElector
方法名：amILeader

ZkLeaderElector.amILeader介绍

暂无

代码示例

代码示例来源：origin: apache/samza

public void onProcessorChange(List<String> processors) {
 if (leaderElector.amILeader()) {
  LOG.info("ZkJobCoordinator::onProcessorChange - list of processors changed. List size=" + processors.size());
  debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, this::doOnProcessorChange);
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.11

public void onProcessorChange(List<String> processors) {
 if (leaderElector.amILeader()) {
  LOG.info("ZkJobCoordinator::onProcessorChange - list of processors changed. List size=" + processors.size());
  debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> doOnProcessorChange(processors));
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.12

public void onProcessorChange(List<String> processors) {
 if (leaderElector.amILeader()) {
  LOG.info("ZkJobCoordinator::onProcessorChange - list of processors changed. List size=" + processors.size());
  debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> doOnProcessorChange(processors));
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.10

public void onProcessorChange(List<String> processors) {
 if (leaderElector.amILeader()) {
  LOG.info("ZkJobCoordinator::onProcessorChange - list of processors changed. List size=" + processors.size());
  debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> doOnProcessorChange(processors));
 }
}

代码示例来源：origin: org.apache.samza/samza-core

public void onProcessorChange(List<String> processors) {
 if (leaderElector.amILeader()) {
  LOG.info("ZkJobCoordinator::onProcessorChange - list of processors changed. List size=" + processors.size());
  debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> doOnProcessorChange(processors));
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.11

@Override
public void onBarrierCreated(String version) {
 // Start the timer for rebalancing
 startTime = System.nanoTime();
 metrics.barrierCreation.inc();
 if (leaderElector.amILeader()) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, (new ZkConfig(config)).getZkBarrierTimeoutMs(), () -> barrier.expire(version));
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.12

@Override
public void onBarrierCreated(String version) {
 // Start the timer for rebalancing
 startTime = System.nanoTime();
 metrics.barrierCreation.inc();
 if (leaderElector.amILeader()) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, (new ZkConfig(config)).getZkBarrierTimeoutMs(), () -> barrier.expire(version));
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.10

@Override
public void onBarrierCreated(String version) {
 // Start the timer for rebalancing
 startTime = System.nanoTime();
 metrics.barrierCreation.inc();
 if (leaderElector.amILeader()) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, (new ZkConfig(config)).getZkBarrierTimeoutMs(), () -> barrier.expire(version));
 }
}

代码示例来源：origin: apache/samza

@Override
public void onBarrierCreated(String version) {
 // Start the timer for rebalancing
 startTime = System.nanoTime();
 metrics.barrierCreation.inc();
 if (leaderElector.amILeader()) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, (new ZkConfig(config)).getZkBarrierTimeoutMs(), () -> barrier.expire(version));
 }
}

代码示例来源：origin: org.apache.samza/samza-core

@Override
public void onBarrierCreated(String version) {
 // Start the timer for rebalancing
 startTime = System.nanoTime();
 metrics.barrierCreation.inc();
 if (leaderElector.amILeader()) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, (new ZkConfig(config)).getZkBarrierTimeoutMs(), () -> barrier.expire(version));
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.10

if (leaderElector.amILeader()) {
 LOG.info("Resigning leadership for processorId: " + processorId);
 leaderElector.resignLeadership();

代码示例来源：origin: org.apache.samza/samza-core_2.10

public void onBarrierStateChanged(final String version, ZkBarrierForVersionUpgrade.State state) {
 LOG.info("JobModel version " + version + " obtained consensus successfully!");
 metrics.barrierStateChange.inc();
 metrics.singleBarrierRebalancingTime.update(System.nanoTime() - startTime);
 if (ZkBarrierForVersionUpgrade.State.DONE.equals(state)) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, 0, () -> {
    LOG.info("pid=" + processorId + "new version " + version + " of the job model got confirmed");
    // read the new Model
    JobModel jobModel = getJobModel();
    // start the container with the new model
    if (coordinatorListener != null) {
     coordinatorListener.onNewJobModel(processorId, jobModel);
    }
   });
 } else {
  if (ZkBarrierForVersionUpgrade.State.TIMED_OUT.equals(state)) {
   // no-op for non-leaders
   // for leader: make sure we do not stop - so generate a new job model
   LOG.warn("Barrier for version " + version + " timed out.");
   if (leaderElector.amILeader()) {
    LOG.info("Leader will schedule a new job model generation");
    debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> {
      // actual actions to do are the same as onProcessorChange
      doOnProcessorChange(new ArrayList<>());
     });
   }
  }
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.11

public void onBarrierStateChanged(final String version, ZkBarrierForVersionUpgrade.State state) {
 LOG.info("JobModel version " + version + " obtained consensus successfully!");
 metrics.barrierStateChange.inc();
 metrics.singleBarrierRebalancingTime.update(System.nanoTime() - startTime);
 if (ZkBarrierForVersionUpgrade.State.DONE.equals(state)) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, 0, () -> {
    LOG.info("pid=" + processorId + "new version " + version + " of the job model got confirmed");
    // read the new Model
    JobModel jobModel = getJobModel();
    // start the container with the new model
    if (coordinatorListener != null) {
     coordinatorListener.onNewJobModel(processorId, jobModel);
    }
   });
 } else {
  if (ZkBarrierForVersionUpgrade.State.TIMED_OUT.equals(state)) {
   // no-op for non-leaders
   // for leader: make sure we do not stop - so generate a new job model
   LOG.warn("Barrier for version " + version + " timed out.");
   if (leaderElector.amILeader()) {
    LOG.info("Leader will schedule a new job model generation");
    debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> {
      // actual actions to do are the same as onProcessorChange
      doOnProcessorChange(new ArrayList<>());
     });
   }
  }
 }
}

代码示例来源：origin: apache/samza

if (leaderElector.amILeader()) {
 LOG.info("Resigning leadership for processorId: " + processorId);
 leaderElector.resignLeadership();

代码示例来源：origin: org.apache.samza/samza-core

public void onBarrierStateChanged(final String version, ZkBarrierForVersionUpgrade.State state) {
 LOG.info("JobModel version " + version + " obtained consensus successfully!");
 metrics.barrierStateChange.inc();
 metrics.singleBarrierRebalancingTime.update(System.nanoTime() - startTime);
 if (ZkBarrierForVersionUpgrade.State.DONE.equals(state)) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, 0, () -> {
    LOG.info("pid=" + processorId + "new version " + version + " of the job model got confirmed");
    // read the new Model
    JobModel jobModel = getJobModel();
    // start the container with the new model
    if (coordinatorListener != null) {
     coordinatorListener.onNewJobModel(processorId, jobModel);
    }
   });
 } else {
  if (ZkBarrierForVersionUpgrade.State.TIMED_OUT.equals(state)) {
   // no-op for non-leaders
   // for leader: make sure we do not stop - so generate a new job model
   LOG.warn("Barrier for version " + version + " timed out.");
   if (leaderElector.amILeader()) {
    LOG.info("Leader will schedule a new job model generation");
    debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> {
      // actual actions to do are the same as onProcessorChange
      doOnProcessorChange(new ArrayList<>());
     });
   }
  }
 }
}

代码示例来源：origin: org.apache.samza/samza-core_2.12

public void onBarrierStateChanged(final String version, ZkBarrierForVersionUpgrade.State state) {
 LOG.info("JobModel version " + version + " obtained consensus successfully!");
 metrics.barrierStateChange.inc();
 metrics.singleBarrierRebalancingTime.update(System.nanoTime() - startTime);
 if (ZkBarrierForVersionUpgrade.State.DONE.equals(state)) {
  debounceTimer.scheduleAfterDebounceTime(barrierAction, 0, () -> {
    LOG.info("pid=" + processorId + "new version " + version + " of the job model got confirmed");
    // read the new Model
    JobModel jobModel = getJobModel();
    // start the container with the new model
    if (coordinatorListener != null) {
     coordinatorListener.onNewJobModel(processorId, jobModel);
    }
   });
 } else {
  if (ZkBarrierForVersionUpgrade.State.TIMED_OUT.equals(state)) {
   // no-op for non-leaders
   // for leader: make sure we do not stop - so generate a new job model
   LOG.warn("Barrier for version " + version + " timed out.");
   if (leaderElector.amILeader()) {
    LOG.info("Leader will schedule a new job model generation");
    debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, debounceTimeMs, () -> {
      // actual actions to do are the same as onProcessorChange
      doOnProcessorChange(new ArrayList<>());
     });
   }
  }
 }
}

代码示例来源：origin: apache/samza

if (leaderElector.amILeader()) {
 LOG.info("Leader will schedule a new job model generation");

代码示例来源：origin: apache/samza

@VisibleForTesting
StreamPartitionCountMonitor getPartitionCountMonitor() {
 StreamMetadataCache streamMetadata = new StreamMetadataCache(systemAdmins, 0, SystemClock.instance());
 Set<SystemStream> inputStreamsToMonitor = new TaskConfigJava(config).getAllInputStreams();
 return new StreamPartitionCountMonitor(
     inputStreamsToMonitor,
     streamMetadata,
     metrics.getMetricsRegistry(),
     new JobConfig(config).getMonitorPartitionChangeFrequency(),
     streamsChanged -> {
   if (leaderElector.amILeader()) {
    debounceTimer.scheduleAfterDebounceTime(ON_PROCESSOR_CHANGE, 0, this::doOnProcessorChange);
   }
  });
}

代码示例来源：origin: org.apache.samza/samza-core_2.10

if (leaderElector.amILeader()) {
 leaderElector.resignLeadership();

代码示例来源：origin: apache/samza

@Test
public void testAmILeader() {
 BooleanResult isLeader1 = new BooleanResult();
 BooleanResult isLeader2 = new BooleanResult();
 // Processor-1
 ZkUtils zkUtils1 = getZkUtilsWithNewClient();
 ZkLeaderElector leaderElector1 = new ZkLeaderElector("1", zkUtils1, null);
 leaderElector1.setLeaderElectorListener(() -> isLeader1.res = true);
 // Processor-2
 ZkUtils zkUtils2 = getZkUtilsWithNewClient();
 ZkLeaderElector leaderElector2 = new ZkLeaderElector("2", zkUtils2, null);
 leaderElector2.setLeaderElectorListener(() -> isLeader2.res = true);
 // Before Leader Election
 Assert.assertFalse(leaderElector1.amILeader());
 Assert.assertFalse(leaderElector2.amILeader());
 leaderElector1.tryBecomeLeader();
 leaderElector2.tryBecomeLeader();
 // After Leader Election
 Assert.assertTrue(leaderElector1.amILeader());
 Assert.assertFalse(leaderElector2.amILeader());
 zkUtils1.close();
 zkUtils2.close();
}