org.apache.curator.framework.recipes.cache.PathChildrenCacheListener Java Examples
The following examples show how to use
org.apache.curator.framework.recipes.cache.PathChildrenCacheListener.
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Example #1
| Source File: MasterSlaveJobSummaryListener.java From niubi-job with Apache License 2.0 | 6 votes |
|
@PostConstruct
public void listen() throws Exception {
MasterSlaveApiFactory masterSlaveApiFactory = new MasterSlaveApiFactoryImpl(client);
PathChildrenCache pathChildrenCache = new PathChildrenCache(client, masterSlaveApiFactory.pathApi().getJobPath(), true);
pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public synchronized void childEvent(CuratorFramework clientInner, PathChildrenCacheEvent event) throws Exception {
if (!EventHelper.isChildUpdateEvent(event) && !EventHelper.isChildAddEvent(event)) {
return;
}
MasterSlaveJobData masterSlaveJobData = new MasterSlaveJobData(event.getData());
if (!masterSlaveJobData.getData().isOperated()) {
return;
}
LoggerHelper.info("begin update master-slave job summary " + masterSlaveJobData.getData());
masterSlaveJobSummaryService.updateJobSummary(masterSlaveJobData.getData());
masterSlaveJobLogService.updateJobLog(masterSlaveJobData.getData());
LoggerHelper.info("update master-slave job summary successfully " + masterSlaveJobData.getData());
}
});
pathChildrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
}
Example #2
| Source File: ZKMasterController.java From twister2 with Apache License 2.0 | 6 votes |
|
/**
* create the listener for ephemeral worker znodes to determine worker joins and failures
*/
private void addEphemChildrenCacheListener(PathChildrenCache cache) {
PathChildrenCacheListener listener = new PathChildrenCacheListener() {
public void childEvent(CuratorFramework clientOfEvent, PathChildrenCacheEvent event) {
switch (event.getType()) {
case CHILD_ADDED:
workerZnodeAdded(event);
break;
case CHILD_REMOVED:
workerZnodeRemoved(event);
break;
default:
// nothing to do
}
}
};
cache.getListenable().addListener(listener);
}
Example #3
| Source File: ZKMasterController.java From twister2 with Apache License 2.0 | 6 votes |
|
/**
* create the listener for persistent worker znodes to determine worker status changes
*/
private void addPersChildrenCacheListener(PathChildrenCache cache) {
PathChildrenCacheListener listener = new PathChildrenCacheListener() {
public void childEvent(CuratorFramework clientOfEvent, PathChildrenCacheEvent event) {
switch (event.getType()) {
case CHILD_UPDATED:
childZnodeUpdated(event);
break;
default:
// nothing to do
}
}
};
cache.getListenable().addListener(listener);
}
Example #4
| Source File: ZKWorkerController.java From twister2 with Apache License 2.0 | 6 votes |
|
/**
* listen for additions to the job events directory in zk server
* @param cache
*/
private void addEventsChildrenCacheListener(PathChildrenCache cache) {
PathChildrenCacheListener listener = new PathChildrenCacheListener() {
public void childEvent(CuratorFramework clientOfEvent, PathChildrenCacheEvent event) {
switch (event.getType()) {
case CHILD_ADDED:
eventPublished(event);
break;
default:
// nothing to do
}
}
};
cache.getListenable().addListener(listener);
}
Example #5
| Source File: ZKUtils.java From Mycat2 with GNU General Public License v3.0 | 6 votes |
|
public static void addChildPathCache(String path, PathChildrenCacheListener listener) {
NameableExecutor businessExecutor = MycatServer.getInstance().getBusinessExecutor();
ExecutorService executor = businessExecutor == null ? Executors.newFixedThreadPool(5) : businessExecutor;
try {
/**
* 监听子节点的变化情况
*/
final PathChildrenCache childrenCache = new PathChildrenCache(getConnection(), path, true);
childrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
childrenCache.getListenable().addListener(listener, executor);
watchMap.put(path, childrenCache);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
Example #6
| Source File: StandbyJobSummaryListener.java From niubi-job with Apache License 2.0 | 6 votes |
|
@PostConstruct
public void listen() throws Exception {
StandbyApiFactory standbyApiFactory = new StandbyApiFactoryImpl(client);
PathChildrenCache pathChildrenCache = new PathChildrenCache(client, standbyApiFactory.pathApi().getJobPath(), true);
pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public synchronized void childEvent(CuratorFramework clientInner, PathChildrenCacheEvent event) throws Exception {
if (!EventHelper.isChildUpdateEvent(event) && !EventHelper.isChildAddEvent(event)) {
return;
}
StandbyJobData standbyJobData = new StandbyJobData(event.getData());
if (!standbyJobData.getData().isOperated()) {
return;
}
LoggerHelper.info("begin update standby job summary " + standbyJobData.getData());
standbyJobSummaryService.updateJobSummary(standbyJobData.getData());
standbyJobLogService.updateJobLog(standbyJobData.getData());
LoggerHelper.info("update standby job summary successfully " + standbyJobData.getData());
}
});
pathChildrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
}
Example #7
| Source File: MetaServerAssignmentHolder.java From hermes with Apache License 2.0 | 6 votes |
|
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 #8
| Source File: ClusterZKImpl.java From pravega with Apache License 2.0 | 6 votes |
|
private PathChildrenCacheListener pathChildrenCacheListener(final ClusterListener listener) {
return (client, event) -> {
log.debug("Event {} generated on cluster", event);
switch (event.getType()) {
case CHILD_ADDED:
log.info("Node {} added to cluster", getServerName(event));
listener.onEvent(HOST_ADDED, Host.fromBytes(event.getData().getData()));
break;
case CHILD_REMOVED:
log.info("Node {} removed from cluster", getServerName(event));
listener.onEvent(HOST_REMOVED, Host.fromBytes(event.getData().getData()));
break;
case CHILD_UPDATED:
log.warn("Invalid usage: Node {} updated externally for cluster", getServerName(event));
break;
case CONNECTION_LOST:
log.error("Connection lost with Zookeeper");
listener.onEvent(ERROR, null);
break;
//$CASES-OMITTED$
default:
log.warn("Received unknown event {}", event.getType());
}
};
}
Example #9
| Source File: ZookeeperSyncToNacosServiceImplTest.java From nacos-sync with Apache License 2.0 | 6 votes |
|
public boolean mockSync(TaskDO taskDO) throws Exception {
List<ChildData> childDataList = spy(ArrayList.class);
ListenerContainer<PathChildrenCacheListener> listeners = mock(ListenerContainer.class);
childDataList.add(new ChildData(TEST_PATH, null, null));
when(taskDO.getTaskId()).thenReturn(TEST_TASK_ID);
when(taskDO.getSourceClusterId()).thenReturn(TEST_SOURCE_CLUSTER_ID);
when(taskDO.getDestClusterId()).thenReturn(TEST_DEST_CLUSTER_ID);
CuratorFramework curatorFramework = mock(CuratorFramework.class);
doReturn(curatorFramework).when(zookeeperServerHolder).get(any(), any());
doReturn(destNamingService).when(nacosServerHolder).get(any(), any());
doReturn(pathChildrenCache).when(zookeeperSyncToNacosService).getPathCache(any());
when(pathChildrenCache.getCurrentData()).thenReturn(childDataList);
doReturn(ClusterTypeEnum.ZK).when(skyWalkerCacheServices).getClusterType(any());
when(pathChildrenCache.getListenable()).thenReturn(listeners);
return zookeeperSyncToNacosService.sync(taskDO);
}
Example #10
| Source File: CuratorFacade.java From fastjgame with Apache License 2.0 | 6 votes |
|
/**
* 创建一个路径节点缓存，返回之前已调用{@link PathChildrenCache#start()}，
* 你需要在使用完之后调用{@link PathChildrenCache#close()}关闭缓存节点；
* 如果你忘记关闭，那么会在curator关闭的时候统一关闭。
* 更多线程安全问题，请查看类文档中提到的笔记。
*
* @param path 父节点
* @param listener 缓存事件监听器，运行在逻辑线程，不必考虑线程安全。
* @return PathChildrenCache 不再使用时需要手动关闭！不要使用{@link PathChildrenCache}获取数据
* @throws Exception zk errors
*/
public CloseableHandle watchChildren(String path, @Nonnull PathChildrenCacheListener listener) throws Exception {
// CloseableExecutorService这个还是不共享的好
CloseableExecutorService watcherService = clientMgr.newClosableExecutorService();
// 指定pathChildrenCache接收事件的线程，复用线程池，以节省开销。
PathChildrenCache pathChildrenCache = new PathChildrenCache(client, path, true, false, watcherService);
// 先添加listener以确保不会遗漏事件 --- 使用EventLoop线程监听，消除同步，listener不必考虑线程安全问题。
pathChildrenCache.getListenable().addListener(listener, appEventLoop);
// 避免外部忘记关闭
this.allocateNodeCache.add(pathChildrenCache);
// 启动缓存
pathChildrenCache.start(PathChildrenCache.StartMode.NORMAL);
return new CloseableHandle(pathChildrenCache);
}
Example #11
| Source File: PathCacheExample.java From ZKRecipesByExample with Apache License 2.0 | 5 votes |
|
private static void addListener(PathChildrenCache cache) {
// a PathChildrenCacheListener is optional. Here, it's used just to log
// changes
PathChildrenCacheListener listener = new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
switch (event.getType()) {
case CHILD_ADDED: {
System.out.println("Node added: " + ZKPaths.getNodeFromPath(event.getData().getPath()) + ", value: "
+ new String(event.getData().getData()));
break;
}
case CHILD_UPDATED: {
System.out.println("Node changed: " + ZKPaths.getNodeFromPath(event.getData().getPath()) + ", value: "
+ new String(event.getData().getData()));
break;
}
case CHILD_REMOVED: {
System.out.println("Node removed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
default:
break;
}
}
};
cache.getListenable().addListener(listener);
}
Example #12
| Source File: ZKClientImpl.java From codes-scratch-zookeeper-netty with Apache License 2.0 | 5 votes |
|
@Override
public List<String> listenChildrenPath(final String parent, final NodeListener listener, final boolean sync)
throws Exception {
PathChildrenCache cache = new PathChildrenCache(client, parent, false, false, EVENT_THREAD_POOL);
cache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework c, PathChildrenCacheEvent e)
throws Exception {
if (e.getData() == null) { return; }
switch (e.getType()) {
case CHILD_ADDED:
listener.nodeChanged(ZKClientImpl.this,
new ChangedEvent(e.getData().getPath(), ChangedEvent.Type.CHILD_ADDED));
break;
case CHILD_REMOVED:
listener.nodeChanged(ZKClientImpl.this,
new ChangedEvent(e.getData().getPath(), ChangedEvent.Type.CHILD_REMOVED));
break;
case CHILD_UPDATED:
listener.nodeChanged(ZKClientImpl.this,
new ChangedEvent(e.getData().getPath(), ChangedEvent.Type.CHILD_UPDATED));
break;
}
}
}, SAME_EXECUTOR);
PathChildrenCache.StartMode mode = sync ? PathChildrenCache.StartMode.BUILD_INITIAL_CACHE : PathChildrenCache.StartMode.NORMAL;
cache.start(mode);
List<ChildData> children = cache.getCurrentData();
List<String> result = new ArrayList<String>();
for (ChildData child : children) {
result.add(child.getPath());
}
return result;
}
Example #13
| Source File: ZKUtils.java From dble with GNU General Public License v2.0 | 5 votes |
|
public static void addViewPathCache(String path, PathChildrenCacheListener listener) {
try {
//watch the child status
final PathChildrenCache childrenCache = new PathChildrenCache(getConnection(), path, true);
childrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
childrenCache.getListenable().addListener(listener);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
Example #14
| Source File: ZKUtils.java From dble with GNU General Public License v2.0 | 5 votes |
|
public static void addChildPathCache(String path, PathChildrenCacheListener listener) {
try {
//watch the child status
final PathChildrenCache childrenCache = new PathChildrenCache(getConnection(), path, true);
childrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
childrenCache.getListenable().addListener(listener);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
Example #15
| Source File: MigrateTaskWatch.java From Mycat2 with GNU General Public License v3.0 | 5 votes |
|
public static void start() {
String migratePath = ZKUtils.getZKBasePath() + "migrate";
// modify by jian.xie,cjw,zwy 如果migrate 启动的时候不存在，无法监听，需要这里监听一次
// 如果第一次没有migrate节点这里应该无法使用集群 还需优化
try {
CuratorFramework client = ZKUtils.getConnection();
if (client.checkExists().forPath(migratePath) == null) {
client.create().creatingParentsIfNeeded().forPath(migratePath);
}
}catch (Exception e){
throw new RuntimeException(e);
}
ZKUtils.addChildPathCache(migratePath, new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework curatorFramework,
PathChildrenCacheEvent fevent) throws Exception {
switch (fevent.getType()) {
case CHILD_ADDED:
LOGGER.info("table CHILD_ADDED: " + fevent.getData().getPath());
ZKUtils.addChildPathCache(fevent.getData().getPath(), new TaskPathChildrenCacheListener());
break;
default:
break;
}
}
});
}
Example #16
| Source File: ZookeeperDistributedLock.java From kylin with Apache License 2.0 | 5 votes |
|
@Override
public Closeable watchLocks(String lockPathRoot, Executor executor, final Watcher watcher) {
PathChildrenCache cache = new PathChildrenCache(curator, lockPathRoot, true);
try {
cache.start();
cache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
switch (event.getType()) {
case CHILD_ADDED:
watcher.onLock(event.getData().getPath(),
new String(event.getData().getData(), StandardCharsets.UTF_8));
break;
case CHILD_REMOVED:
watcher.onUnlock(event.getData().getPath(),
new String(event.getData().getData(), StandardCharsets.UTF_8));
break;
default:
break;
}
}
}, executor);
} catch (Exception ex) {
logger.error("Error to watch lock path " + lockPathRoot, ex);
}
return cache;
}
Example #17
| Source File: PathCacheExample.java From curator with Apache License 2.0 | 5 votes |
|
private static void addListener(PathChildrenCache cache)
{
// a PathChildrenCacheListener is optional. Here, it's used just to log changes
PathChildrenCacheListener listener = new PathChildrenCacheListener()
{
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception
{
switch ( event.getType() )
{
case CHILD_ADDED:
{
System.out.println("Node added: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
case CHILD_UPDATED:
{
System.out.println("Node changed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
case CHILD_REMOVED:
{
System.out.println("Node removed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
}
}
};
cache.getListenable().addListener(listener);
}
Example #18
| Source File: ZookeeperRegistry.java From sofa-rpc with Apache License 2.0 | 5 votes |
|
/**
* 订阅IP级配置（服务发布暂时不支持动态配置,暂时支持订阅ConsumerConfig参数设置）
*
* @param config consumer config
* @param listener config listener
*/
protected void subscribeOverride(final ConsumerConfig config, ConfigListener listener) {
try {
if (overrideObserver == null) { // 初始化
overrideObserver = new ZookeeperOverrideObserver();
}
overrideObserver.addConfigListener(config, listener);
final String overridePath = buildOverridePath(rootPath, config);
final AbstractInterfaceConfig registerConfig = getRegisterConfig(config);
// 监听配置节点下 子节点增加、子节点删除、子节点Data修改事件
PathChildrenCache pathChildrenCache = new PathChildrenCache(zkClient, overridePath, true);
pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework client1, PathChildrenCacheEvent event) throws Exception {
if (LOGGER.isDebugEnabled(config.getAppName())) {
LOGGER.debug("Receive zookeeper event: " + "type=[" + event.getType() + "]");
}
switch (event.getType()) {
case CHILD_ADDED: //新增IP级配置
overrideObserver.addConfig(config, overridePath, event.getData());
break;
case CHILD_REMOVED: //删除IP级配置
overrideObserver.removeConfig(config, overridePath, event.getData(), registerConfig);
break;
case CHILD_UPDATED:// 更新IP级配置
overrideObserver.updateConfig(config, overridePath, event.getData());
break;
default:
break;
}
}
});
pathChildrenCache.start(PathChildrenCache.StartMode.BUILD_INITIAL_CACHE);
INTERFACE_OVERRIDE_CACHE.put(overridePath, pathChildrenCache);
overrideObserver.updateConfigAll(config, overridePath, pathChildrenCache.getCurrentData());
} catch (Exception e) {
throw new SofaRpcRuntimeException(LogCodes.getLog(LogCodes.ERROR_SUB_PROVIDER_OVERRIDE, EXT_NAME), e);
}
}
Example #19
| Source File: ZookeeperDistributedLock.java From kylin-on-parquet-v2 with Apache License 2.0 | 5 votes |
|
@Override
public Closeable watchLocks(String lockPathRoot, Executor executor, final Watcher watcher) {
PathChildrenCache cache = new PathChildrenCache(curator, lockPathRoot, true);
try {
cache.start();
cache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
switch (event.getType()) {
case CHILD_ADDED:
watcher.onLock(event.getData().getPath(),
new String(event.getData().getData(), StandardCharsets.UTF_8));
break;
case CHILD_REMOVED:
watcher.onUnlock(event.getData().getPath(),
new String(event.getData().getData(), StandardCharsets.UTF_8));
break;
default:
break;
}
}
}, executor);
} catch (Exception ex) {
logger.error("Error to watch lock path " + lockPathRoot, ex);
}
return cache;
}
Example #20
| Source File: PathCacheExample.java From xian with Apache License 2.0 | 5 votes |
|
private static void addListener(PathChildrenCache cache)
{
// a PathChildrenCacheListener is optional. Here, it's used just to log changes
PathChildrenCacheListener listener = new PathChildrenCacheListener()
{
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception
{
switch ( event.getType() )
{
case CHILD_ADDED:
{
System.out.println("Node added: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
case CHILD_UPDATED:
{
System.out.println("Node changed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
case CHILD_REMOVED:
{
System.out.println("Node removed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
break;
}
}
}
};
cache.getListenable().addListener(listener);
}
Example #21
| Source File: ZookeeperRegistry.java From sofa-rpc with Apache License 2.0 | 5 votes |
|
/**
* 订阅接口级配置
*
* @param config provider/consumer config
* @param listener config listener
*/
protected void subscribeConfig(final AbstractInterfaceConfig config, ConfigListener listener) {
try {
if (configObserver == null) { // 初始化
configObserver = new ZookeeperConfigObserver();
}
configObserver.addConfigListener(config, listener);
final String configPath = buildConfigPath(rootPath, config);
// 监听配置节点下 子节点增加、子节点删除、子节点Data修改事件
PathChildrenCache pathChildrenCache = new PathChildrenCache(zkClient, configPath, true);
pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework client1, PathChildrenCacheEvent event) throws Exception {
if (LOGGER.isDebugEnabled(config.getAppName())) {
LOGGER.debug("Receive zookeeper event: " + "type=[" + event.getType() + "]");
}
switch (event.getType()) {
case CHILD_ADDED: //新增接口级配置
configObserver.addConfig(config, configPath, event.getData());
break;
case CHILD_REMOVED: //删除接口级配置
configObserver.removeConfig(config, configPath, event.getData());
break;
case CHILD_UPDATED:// 更新接口级配置
configObserver.updateConfig(config, configPath, event.getData());
break;
default:
break;
}
}
});
pathChildrenCache.start(PathChildrenCache.StartMode.BUILD_INITIAL_CACHE);
INTERFACE_CONFIG_CACHE.put(configPath, pathChildrenCache);
configObserver.updateConfigAll(config, configPath, pathChildrenCache.getCurrentData());
} catch (Exception e) {
throw new SofaRpcRuntimeException(LogCodes.getLog(LogCodes.ERROR_SUB_PROVIDER_CONFIG, EXT_NAME), e);
}
}
Example #22
| Source File: ZKBarrierHandler.java From twister2 with Apache License 2.0 | 5 votes |
|
/**
* create the listener for barrier event znodes in the barrier directory
* to determine whether all workers arrived on the barrier
*/
private void addBarrierChildrenCacheListener(
PathChildrenCache cache,
JobMasterAPI.BarrierType barrierType) {
PathChildrenCacheListener listener = new PathChildrenCacheListener() {
public void childEvent(CuratorFramework clientOfEvent, PathChildrenCacheEvent event) {
String childPath = event.getData().getPath();
int workerID = ZKUtils.getWorkerIDFromPersPath(childPath);
long timeout = Longs.fromByteArray(event.getData().getData());
switch (event.getType()) {
case CHILD_ADDED:
if (barrierType == JobMasterAPI.BarrierType.DEFAULT) {
barrierMonitor.arrivedAtDefault(workerID, timeout);
} else if (barrierType == JobMasterAPI.BarrierType.INIT) {
barrierMonitor.arrivedAtInit(workerID, timeout);
}
break;
case CHILD_REMOVED:
if (barrierType == JobMasterAPI.BarrierType.DEFAULT) {
barrierMonitor.removedFromDefault(workerID);
} else if (barrierType == JobMasterAPI.BarrierType.INIT) {
barrierMonitor.removedFromInit(workerID);
}
break;
default:
// nothing to do
}
}
};
cache.getListenable().addListener(listener);
}
Example #23
| Source File: ClusterStateHolder.java From hermes with Apache License 2.0 | 5 votes |
|
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 #24
| Source File: Zk.java From t-io with Apache License 2.0 | 5 votes |
|
/**
*
* @param path
* @param pathChildrenCacheListener
* @throws Exception
*/
@SuppressWarnings("resource")
public static void addPathChildrenCacheListener(String path, PathChildrenCacheListener pathChildrenCacheListener) throws Exception {
PathChildrenCache cache = new PathChildrenCache(zkclient, path, true);
cache.start();
// System.out.println("监听开始/zk........");
// PathChildrenCacheListener plis = new PathChildrenCacheListener()
// {
//
// @Override
// public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception
// {
// switch (event.getType())
// {
// case CHILD_ADDED:
// {
// System.out.println("Node added: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
// break;
// }
//
// case CHILD_UPDATED:
// {
// System.out.println("Node changed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
// break;
// }
//
// case CHILD_REMOVED:
// {
// System.out.println("Node removed: " + ZKPaths.getNodeFromPath(event.getData().getPath()));
// break;
// }
// }
//
// }
// };
// //注册监听
cache.getListenable().addListener(pathChildrenCacheListener);
}
Example #25
| Source File: LeaderInitEventHandler.java From hermes with Apache License 2.0 | 4 votes |
|
protected MetaServerListListener(long version, ListenerContainer<PathChildrenCacheListener> listenerContainer) {
super(version, listenerContainer);
}
Example #26
| Source File: LeaderInitEventHandler.java From hermes with Apache License 2.0 | 4 votes |
|
protected void addMetaServerListListener(long version) throws Exception {
ListenerContainer<PathChildrenCacheListener> listenerContainer = m_metaServerListCache.getListenable();
listenerContainer.addListener(new MetaServerListListener(version, listenerContainer), m_eventBus.getExecutor());
}
Example #27
| Source File: BasePathChildrenCacheListener.java From hermes with Apache License 2.0 | 4 votes |
|
protected BasePathChildrenCacheListener(long version, ListenerContainer<PathChildrenCacheListener> listenerContainer) {
m_version = version;
m_eventBus = PlexusComponentLocator.lookup(EventBus.class);
m_clusterStateHolder = PlexusComponentLocator.lookup(ClusterStateHolder.class);
m_listenerContainer = listenerContainer;
}
Example #28
| Source File: AlarmEPLManager.java From nightwatch with GNU Lesser General Public License v3.0 | 4 votes |
|
public AlarmEPLManager(Map conf, CountDownLatch latch) {
this.conf = conf;
this.latch = latch;
this.configuration = new Configuration();
this.addMethods(configuration);
this.addDbs();
this.epService = EPServiceProviderManager.getDefaultProvider(configuration);
this.admin = epService.getEPAdministrator();
this.addSchemas();
this.addEpls();
this.start();
curator = CuratorFrameworkFactory
.newClient(com.jzsec.rtc.config.Configuration.getConfig().getString("rtc.zk.hosts"),
Utils.getInt(conf.get(Config.STORM_ZOOKEEPER_SESSION_TIMEOUT)),
Utils.getInt(conf.get(Config.STORM_ZOOKEEPER_CONNECTION_TIMEOUT)),
new RetryNTimes(
Utils.getInt(conf.get(Config.STORM_ZOOKEEPER_RETRY_TIMES)),
Utils.getInt(conf.get(Config.STORM_ZOOKEEPER_RETRY_INTERVAL))
));
curator.start();
createPath();
ExecutorService pool = Executors.newFixedThreadPool(2);
final PathChildrenCache pathChildrenCache = new PathChildrenCache(curator, "/alarm", true);
try {
pathChildrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
public void childEvent(CuratorFramework framework,
PathChildrenCacheEvent event) throws Exception {
List<ChildData> childDataList = pathChildrenCache.getCurrentData();
if(event.getType() == PathChildrenCacheEvent.Type.CHILD_ADDED || event.getType() == PathChildrenCacheEvent.Type.CHILD_UPDATED) {
if (childDataList != null && childDataList.size() > 0) {
// update and reload single rule by businessScope in future
List<Map<Object, Object>> zkDataList = new ArrayList<Map<Object, Object>>();
for (ChildData childData : childDataList) {
LOG.info("==" + childData.getPath() + " changed," + new String(childData.getData(), "UTF-8"));
String data = new String(childData.getData(), "UTF-8");
if(!StringUtils.isEmpty(data)) {
System.out.println("==" + childData.getPath() + " changed," + new String(childData.getData(), "UTF-8"));
Map<Object, Object> zkData = (Map<Object, Object>) JSONValue.parse(data);
zkDataList.add(zkData);
}
}
if(zkDataList.size() > 0) refresh(zkDataList);
}
}
}
}, pool);
} catch (Exception e) {
e.printStackTrace();
}
}
Example #29
| Source File: ZooKeeperBucketService.java From pravega with Apache License 2.0 | 4 votes |
|
@Override
public void startBucketChangeListener() {
PathChildrenCacheListener bucketListener = (client, event) -> {
StreamImpl stream;
switch (event.getType()) {
case CHILD_ADDED:
case CHILD_UPDATED:
stream = bucketStore.getStreamFromPath(event.getData().getPath());
notify(new StreamNotification(stream.getScope(), stream.getStreamName(), NotificationType.StreamAdded));
break;
case CHILD_REMOVED:
stream = bucketStore.getStreamFromPath(event.getData().getPath());
notify(new StreamNotification(stream.getScope(), stream.getStreamName(), NotificationType.StreamRemoved));
break;
case CONNECTION_LOST:
notify(new StreamNotification(null, null, NotificationType.ConnectivityError));
break;
default:
log.warn("Received unknown event {} on bucket", event.getType(), getBucketId());
}
};
PathChildrenCache pathChildrenCache = cacheRef.updateAndGet(existing -> {
if (existing == null) {
PathChildrenCache cache = bucketStore.getBucketPathChildrenCache(getServiceType(), getBucketId());
cache.getListenable().addListener(bucketListener);
log.info("bucket {} change notification listener registered", getBucketId());
return cache;
} else {
return existing;
}
});
try {
pathChildrenCache.start(PathChildrenCache.StartMode.NORMAL);
} catch (Exception e) {
log.error("{}: Starting listener on bucket {} threw exception", getServiceType(), getBucketId(), e);
throw Exceptions.sneakyThrow(e);
}
}
Example #30
| Source File: MockCurator.java From vespa with Apache License 2.0 | 4 votes |
|
public void add(Path path, PathChildrenCacheListener listener) {
directoryListeners.put(path, listener);
}
