org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode Java Examples

The following examples show how to use org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: MetaServerAssignmentHolder.java    From hermes with Apache License 2.0 6 votes vote down vote up 
private void initPathChildrenCache() throws InitializationException {
	m_pathChildrenCache = new PathChildrenCache(m_zkClient.get(), ZKPathUtils.getMetaServerAssignmentRootZkPath(),
	      true);

	m_pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {

		@Override
		public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
			if (event.getType() == PathChildrenCacheEvent.Type.CHILD_ADDED
			      || event.getType() == PathChildrenCacheEvent.Type.CHILD_REMOVED
			      || event.getType() == PathChildrenCacheEvent.Type.CHILD_UPDATED) {
				String topic = ZKPathUtils.lastSegment(event.getData().getPath());
				m_topiAssignmentCache.invalidate(topic);
			}
		}
	});

	try {
		m_pathChildrenCache.start(StartMode.BUILD_INITIAL_CACHE);
	} catch (Exception e) {
		throw new InitializationException("Init metaServerAssignmentHolder failed.", e);
	}
}
Example #2
Source File: RefreshableTransportPool.java    From jigsaw-payment with Apache License 2.0 6 votes vote down vote up 
public void start() throws Exception {
    if (this.cache == null) {
        if (this.executorService == null) {
            this.cache = new PathChildrenCache(client, path, cacheData);
        } else {
            this.cache = new PathChildrenCache(client, path, cacheData,
                    dataIsCompressed, this.executorService);
        }
    }
    this.cache.getListenable().addListener(this);
    this.cache.start(StartMode.POST_INITIALIZED_EVENT);
    //this.prepareInstances();
    // call super to initialize the pool;
    super.start();
    LOG.info("transport pooling factory started. ");
}
Example #3
Source File: TransactorCache.java    From fluo with Apache License 2.0 6 votes vote down vote up 
public TransactorCache(Environment env) {
  final FluoConfiguration conf = env.getConfiguration();

  timeoutCache =
      CacheBuilder.newBuilder().maximumSize(FluoConfigurationImpl.getTransactorMaxCacheSize(conf))
          .expireAfterAccess(
              FluoConfigurationImpl.getTransactorCacheTimeout(conf, TimeUnit.MILLISECONDS),
              TimeUnit.MILLISECONDS)
          .concurrencyLevel(10).build();

  this.env = env;
  cache = new PathChildrenCache(env.getSharedResources().getCurator(),
      ZookeeperPath.TRANSACTOR_NODES, true);
  try {
    cache.start(StartMode.BUILD_INITIAL_CACHE);
    status = TcStatus.OPEN;
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}
Example #4
Source File: ClusterStateHolder.java    From hermes with Apache License 2.0 5 votes vote down vote up 
private void startLeaderLatchPathChildrenCache() throws InitializationException {
	try {
		m_leaderLatchPathChildrenCache = new PathChildrenCache(m_client.get(), ZKPathUtils.getMetaServersZkPath(),
		      true);

		m_leaderLatchPathChildrenCache.getListenable().addListener(
		      new PathChildrenCacheListener() {

			      @Override
			      public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
				      if (event.getType() == PathChildrenCacheEvent.Type.CHILD_ADDED
				            || event.getType() == PathChildrenCacheEvent.Type.CHILD_REMOVED
				            || event.getType() == PathChildrenCacheEvent.Type.CHILD_UPDATED) {
					      updateLeaderInfo();
				      }
			      }
		      },
		      Executors.newSingleThreadExecutor(HermesThreadFactory.create(
		            "LeaderLatchPathChildrenCacheListenerExecutor", true)));

		m_leaderLatchPathChildrenCache.start(StartMode.BUILD_INITIAL_CACHE);
	} catch (Exception e) {
		throw new InitializationException("Init metaServer leaderLatch parent pathChildrenCache failed.", e);
	}

	updateLeaderInfo();
}
Example #5
Source File: PartitionManager.java    From fluo with Apache License 2.0 5 votes vote down vote up 
PartitionManager(Environment env, long minSleepTime, long maxSleepTime) {
  try {
    this.curator = env.getSharedResources().getCurator();
    this.env = env;

    this.minSleepTime = minSleepTime;
    this.maxSleepTime = maxSleepTime;
    this.retrySleepTime = minSleepTime;

    groupSize = env.getConfiguration().getInt(FluoConfigurationImpl.WORKER_PARTITION_GROUP_SIZE,
        FluoConfigurationImpl.WORKER_PARTITION_GROUP_SIZE_DEFAULT);

    myESNode = new PersistentNode(curator, CreateMode.EPHEMERAL_SEQUENTIAL, false,
        ZookeeperPath.FINDERS + "/" + ZK_FINDER_PREFIX, ("" + groupSize).getBytes(UTF_8));
    myESNode.start();
    myESNode.waitForInitialCreate(1, TimeUnit.MINUTES);

    childrenCache = new PathChildrenCache(curator, ZookeeperPath.FINDERS, true);
    childrenCache.getListenable().addListener(new FindersListener());
    childrenCache.start(StartMode.BUILD_INITIAL_CACHE);

    schedExecutor = Executors.newScheduledThreadPool(1,
        new FluoThreadFactory("Fluo worker partition manager"));
    schedExecutor.scheduleWithFixedDelay(new CheckTabletsTask(), 0, maxSleepTime,
        TimeUnit.MILLISECONDS);

    scheduleUpdate();
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}
Example #6
Source File: CuratorKafkaMonitor.java    From Kafdrop with Apache License 2.0 4 votes vote down vote up 
public CuratorKafkaMonitor(CuratorFramework curatorFramework,
                           CuratorKafkaMonitorProperties properties,
                           ObjectMapper objectMapper) throws Exception
{
   this.curatorFramework = curatorFramework;
   this.properties = properties;
   this.objectMapper = objectMapper;

   try
   {
      kafkaVersion = new Version(properties.getKafkaVersion());
   }
   catch (Exception ex)
   {
      throw new IllegalStateException("Invalid kafka version: " + properties.getKafkaVersion(), ex);
   }

   threadPool = new ForkJoinPool(properties.getThreadPoolSize());

   FixedBackOffPolicy backOffPolicy = new FixedBackOffPolicy();
   backOffPolicy.setBackOffPeriod(properties.getRetry().getBackoffMillis());

   final SimpleRetryPolicy retryPolicy =
      new SimpleRetryPolicy(properties.getRetry().getMaxAttempts(),
                            ImmutableMap.of(InterruptedException.class, false,
                                            Exception.class, true));

   retryTemplate = new RetryTemplate();
   retryTemplate.setBackOffPolicy(backOffPolicy);
   retryTemplate.setRetryPolicy(retryPolicy);

   cacheInitCounter.set(4);

   brokerPathCache = new PathChildrenCache(curatorFramework, ZkUtils.BrokerIdsPath(), true);
   brokerPathCache.getListenable().addListener(new BrokerListener());
   brokerPathCache.getListenable().addListener((f, e) -> {
      if (e.getType() == PathChildrenCacheEvent.Type.INITIALIZED)
      {
         cacheInitCounter.decrementAndGet();
         LOG.info("Broker cache initialized");
      }
   });
   brokerPathCache.start(StartMode.POST_INITIALIZED_EVENT);

   topicConfigPathCache = new PathChildrenCache(curatorFramework, ZkUtils.TopicConfigPath(), true);
   topicConfigPathCache.getListenable().addListener((f, e) -> {
      if (e.getType() == PathChildrenCacheEvent.Type.INITIALIZED)
      {
         cacheInitCounter.decrementAndGet();
         LOG.info("Topic configuration cache initialized");
      }
   });
   topicConfigPathCache.start(StartMode.POST_INITIALIZED_EVENT);

   topicTreeCache = new TreeCache(curatorFramework, ZkUtils.BrokerTopicsPath());
   topicTreeCache.getListenable().addListener((client, event) -> {
      if (event.getType() == TreeCacheEvent.Type.INITIALIZED)
      {
         cacheInitCounter.decrementAndGet();
         LOG.info("Topic tree cache initialized");
      }
   });
   topicTreeCache.start();

   consumerTreeCache = new TreeCache(curatorFramework, ZkUtils.ConsumersPath());
   consumerTreeCache.getListenable().addListener((client, event) -> {
      if (event.getType() == TreeCacheEvent.Type.INITIALIZED)
      {
         cacheInitCounter.decrementAndGet();
         LOG.info("Consumer tree cache initialized");
      }
   });
   consumerTreeCache.start();

   controllerNodeCache = new NodeCache(curatorFramework, ZkUtils.ControllerPath());
   controllerNodeCache.getListenable().addListener(this::updateController);
   controllerNodeCache.start(true);
   updateController();
}
Example #7
Source File: BaragonAuthUpdater.java    From Baragon with Apache License 2.0 4 votes vote down vote up 
@Override
public void start() throws Exception {
  pathChildrenCache.start(StartMode.BUILD_INITIAL_CACHE);

  pathChildrenCache.getListenable().addListener(this);
}