Java Code Examples for org.apache.curator.framework.recipes.cache.PathChildrenCache#start()
The following examples show how to use
org.apache.curator.framework.recipes.cache.PathChildrenCache#start() .
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Example 1
| Source File: ZookeeperRegistryCenter.java From eagle with Apache License 2.0 | 6 votes |
|
@Override
public PathChildrenCache addChildrenCacheData(final String cachePath, boolean cacheData) {
if (childrenCaches.containsKey(cachePath)) {
return childrenCaches.get(cachePath);
}
PathChildrenCache cache = new PathChildrenCache(client, cachePath, cacheData);
try {
cache.start();
//CHECKSTYLE:OFF
} catch (final Exception ex) {
//CHECKSTYLE:ON
throw new EagleFrameException(ex);
}
childrenCaches.put(cachePath, cache);
return cache;
}
Example 2
| Source File: ZkDiscoveryService.java From iotplatform with Apache License 2.0 | 6 votes |
|
@PostConstruct
public void init() {
log.info("Initializing...");
Assert.hasLength(zkUrl, MiscUtils.missingProperty("zk.url"));
Assert.notNull(zkRetryInterval, MiscUtils.missingProperty("zk.retry_interval_ms"));
Assert.notNull(zkConnectionTimeout, MiscUtils.missingProperty("zk.connection_timeout_ms"));
Assert.notNull(zkSessionTimeout, MiscUtils.missingProperty("zk.session_timeout_ms"));
log.info("Initializing discovery service using ZK connect string: {}", zkUrl);
zkNodesDir = zkDir + "/nodes";
try {
client = CuratorFrameworkFactory.newClient(zkUrl, zkSessionTimeout, zkConnectionTimeout,
new RetryForever(zkRetryInterval));
client.start();
client.blockUntilConnected();
cache = new PathChildrenCache(client, zkNodesDir, true);
cache.getListenable().addListener(this);
cache.start();
} catch (Exception e) {
log.error("Failed to connect to ZK: {}", e.getMessage(), e);
CloseableUtils.closeQuietly(client);
throw new RuntimeException(e);
}
}
Example 3
| Source File: TransactorCache.java From fluo with Apache License 2.0 | 6 votes |
|
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: 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 5
| 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 6
| Source File: ScrollChildrenChangeListener.java From SkyEye with GNU General Public License v3.0 | 5 votes |
|
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
switch (event.getType()) {
case CHILD_ADDED:
PathChildrenCache pathChildrenCache = new PathChildrenCache(client, event.getData().getPath(), true);
pathChildrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
pathChildrenCache.getListenable().addListener(new AppChildrenChangeListener(this.rabbitmqService, this.zkClient, this.appInfoService));
LOGGER.info("app added: " + event.getData().getPath());
break;
case CHILD_REMOVED:
LOGGER.info("app removed: " + event.getData().getPath());
break;
}
}
Example 7
| 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 8
| Source File: OracleClient.java From fluo with Apache License 2.0 | 5 votes |
|
@Override
public void run() {
try {
synchronized (this) {
// want this code to be mutually exclusive with close() .. so if in middle of setup, close
// method will wait till finished
if (closed.get()) {
return;
}
curatorFramework = CuratorUtil.newAppCurator(env.getConfiguration());
CuratorCnxnListener cnxnListener = new CuratorCnxnListener();
curatorFramework.getConnectionStateListenable().addListener(cnxnListener);
curatorFramework.start();
while (!cnxnListener.isConnected()) {
UtilWaitThread.sleep(200);
}
leaderLatch = new LeaderLatch(curatorFramework, ZookeeperPath.ORACLE_SERVER);
pathChildrenCache =
new PathChildrenCache(curatorFramework, ZookeeperPath.ORACLE_SERVER, true);
pathChildrenCache.getListenable().addListener(this);
pathChildrenCache.start();
connect();
}
doWork();
} catch (Exception e) {
if (!closed.get()) {
log.error("Exception occurred in run() method", e);
} else {
log.debug("Exception occurred in run() method", e);
}
}
}
Example 9
| 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 10
| Source File: PartitionManager.java From fluo with Apache License 2.0 | 5 votes |
|
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 11
| Source File: Curator4ZookeeperRegistry.java From spring-cloud-sofastack-samples 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) {
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((client1, event) -> {
if (LOGGER.isDebugEnabled(config.getAppName())) {
LOGGER.debug("Receive zookeeper event: " + "type=[" + event.getType() + "]");
}
switch (event.getType()) {
case CHILD_ADDED:
overrideObserver.addConfig(config, overridePath, event.getData());
break;
case CHILD_REMOVED:
overrideObserver.removeConfig(config, overridePath, event.getData(),
registerConfig);
break;
case CHILD_UPDATED:
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 (Throwable t) {
throw new SofaRpcRuntimeException(
"Failed to subscribe provider config from zookeeperRegistry!", t);
}
}
Example 12
| Source File: Curator4ZookeeperRegistry.java From spring-cloud-sofastack-samples 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) {
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((client1, event) -> {
if (LOGGER.isDebugEnabled(config.getAppName())) {
LOGGER.debug("Receive zookeeper event: " + "type=[" + event.getType() + "]");
}
switch (event.getType()) {
case CHILD_ADDED:
configObserver.addConfig(config, configPath, event.getData());
break;
case CHILD_REMOVED:
configObserver.removeConfig(config, configPath, event.getData());
break;
case CHILD_UPDATED:
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 (Throwable t) {
throw new SofaRpcRuntimeException(
"Failed to subscribe provider config from zookeeperRegistry!", t);
}
}
Example 13
| 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 14
| Source File: ZkResAware.java From xian with Apache License 2.0 | 4 votes |
|
@Override
public PathChildrenCache load(String pluginName) throws Exception {
PathChildrenCache cache = new PathChildrenCache(ZkConnection.client, fullPath(pluginName), true);
cache.start(PathChildrenCache.StartMode.BUILD_INITIAL_CACHE);
return cache;
}
Example 15
| Source File: CuratorPCWatcher.java From BigData-In-Practice with Apache License 2.0 | 4 votes |
|
public static void main(String[] args) throws Exception {
final String nodePath = "/testZK";
RetryPolicy retryPolicy = new ExponentialBackoffRetry(10000, 5);
CuratorFramework client = CuratorFrameworkFactory.builder().connectString(zkServerIps)
.sessionTimeoutMs(10000).retryPolicy(retryPolicy).build();
client.start();
try {
// 为子节点添加watcher，PathChildrenCache: 监听数据节点的增删改，可以设置触发的事件
final PathChildrenCache childrenCache = new PathChildrenCache(client, nodePath, true);
/**
* StartMode: 初始化方式
* - POST_INITIALIZED_EVENT：异步初始化，初始化之后会触发事件
* - NORMAL：异步初始化
* - BUILD_INITIAL_CACHE：同步初始化
*/
childrenCache.start(PathChildrenCache.StartMode.BUILD_INITIAL_CACHE);
// 列出子节点数据列表，需要使用BUILD_INITIAL_CACHE同步初始化模式才能获得，异步是获取不到的
List<ChildData> childDataList = childrenCache.getCurrentData();
System.out.println("当前节点的子节点详细数据列表：");
for (ChildData childData : childDataList) {
System.out.println("\t* 子节点路径：" + new String(childData.getPath()) + "，该节点的数据为：" + new String(childData.getData()));
}
// 添加事件监听器
childrenCache.getListenable().addListener(new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework curatorFramework, PathChildrenCacheEvent event) throws Exception {
// 通过判断event type的方式来实现不同事件的触发
if (event.getType().equals(PathChildrenCacheEvent.Type.INITIALIZED)) { // 子节点初始化时触发
System.out.println("子节点初始化成功");
} else if (event.getType().equals(PathChildrenCacheEvent.Type.CHILD_ADDED)) { // 添加子节点时触发
System.out.print("子节点：" + event.getData().getPath() + " 添加成功，");
System.out.println("该子节点的数据为：" + new String(event.getData().getData()));
} else if (event.getType().equals(PathChildrenCacheEvent.Type.CHILD_REMOVED)) { // 删除子节点时触发
System.out.println("子节点：" + event.getData().getPath() + " 删除成功");
} else if (event.getType().equals(PathChildrenCacheEvent.Type.CHILD_UPDATED)) { // 修改子节点数据时触发
System.out.print("子节点：" + event.getData().getPath() + " 数据更新成功，");
System.out.println("子节点：" + event.getData().getPath() + " 新的数据为：" + new String(event.getData().getData()));
}
}
});
Thread.sleep(100000); // sleep 100秒，在 zkCli.sh 操作子节点，注意查看控制台的输出
} finally {
client.close();
}
}
Example 16
| Source File: CuratorChildrenCache.java From yuzhouwan with Apache License 2.0 | 4 votes |
|
public void addChildrenListener(String path) throws Exception {
Stat existStat = curatorFramework.checkExists().forPath(path);
if (existStat == null)
curatorFramework
.create()
.creatingParentsIfNeeded()
.withMode(CreateMode.PERSISTENT)
.forPath(path);
final PathChildrenCache pathChildrenCache = new PathChildrenCache(curatorFramework, path, false);
pathChildrenCache.start(PathChildrenCache.StartMode.NORMAL);
pathChildrenCache
.getListenable()
.addListener(
(CuratorFramework client, PathChildrenCacheEvent event) -> {
PathChildrenCacheEvent.Type type = event.getType();
LOG.info("Event type: {}", type);
switch (type) {
case CONNECTION_RECONNECTED:
LOG.info("Reconnected...");
break;
case CONNECTION_LOST:
LOG.info("Connection lost...");
pathChildrenCache.rebuild();
LOG.info("Rebuild pathChildrenCache...");
break;
case CONNECTION_SUSPENDED:
LOG.info("Connection suspended...");
break;
case CHILD_ADDED:
LOG.info("Add new child: {}", event.getData().getPath());
break;
case CHILD_UPDATED:
LOG.info("Updated child: {}", event.getData().getPath());
break;
case CHILD_REMOVED:
LOG.info("Removed child: {}", event.getData().getPath());
break;
default:
LOG.error(String.format("Something was not excepted: %s", type));
break;
}
}
);
}
Example 17
| 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 18
| Source File: EPLManager.java From nightwatch with GNU Lesser General Public License v3.0 | 4 votes |
|
public EPLManager(Map conf, OutputCollector collector, CountDownLatch latch) {
if(collector != null) this.collector = collector;
this.conf = conf;
this.latch = latch;
this.configuration = new com.espertech.esper.client.Configuration();
this.configuration.getEngineDefaults().getThreading().setInsertIntoDispatchPreserveOrder(false);
this.addMethods(configuration);
this.addDbs();
this.epService = EPServiceProviderManager.getDefaultProvider(configuration);
this.admin = epService.getEPAdministrator();
this.addSchemas(null);
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, "/risk", 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);
if(!zkData.containsKey("type")) {
String childPath = childData.getPath();
zkData.put("type", childPath.substring(childPath.lastIndexOf("/") + 1));
}
zkDataList.add(zkData);
}
}
if(zkDataList.size() > 0) refresh(zkDataList);
}
}
}
}, pool);
} catch (Exception e) {
e.printStackTrace();
}
}
Example 19
| Source File: CuratorClientService.java From knox with Apache License 2.0 | 4 votes |
|
@Override
public void addChildEntryListener(String path, ChildEntryListener listener) throws Exception {
PathChildrenCache childCache = new PathChildrenCache(delegate, path, false);
childCache.getListenable().addListener(new ChildEntryListenerAdapter(this, listener));
childCache.start();
}
Example 20
| Source File: ZKMasterController.java From twister2 with Apache License 2.0 | 4 votes |
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/**
* initialize JM when it is coming from failure
* @throws Exception
*/
private void initRestarting() throws Exception {
LOG.info("Job Master restarting .... ");
// build the cache
// we will not get events for the past worker joins/fails
ephemChildrenCache = new PathChildrenCache(client, ephemDir, true);
addEphemChildrenCacheListener(ephemChildrenCache);
ephemChildrenCache.start(PathChildrenCache.StartMode.BUILD_INITIAL_CACHE);
List<ChildData> joinedWorkerZnodes = ephemChildrenCache.getCurrentData();
LOG.info("Initially existing workers: " + joinedWorkerZnodes.size());
// We listen for status updates for persistent path
persChildrenCache = new PathChildrenCache(client, persDir, true);
addPersChildrenCacheListener(persChildrenCache);
persChildrenCache.start(PathChildrenCache.StartMode.BUILD_INITIAL_CACHE);
// get all joined workers and provide them to workerMonitor
List<WorkerWithState> joinedWorkers = new LinkedList<>();
for (ChildData child : joinedWorkerZnodes) {
String fullPath = child.getPath();
int workerID = ZKUtils.getWorkerIDFromEphemPath(fullPath);
WorkerWithState workerWithState = getWorkerWithState(workerID);
if (workerWithState != null) {
joinedWorkers.add(workerWithState);
} else {
LOG.severe("worker[" + fullPath + "] added, but its data can not be retrieved.");
}
}
// publish jm restarted event
jmRestarted();
// if all workers joined and allJoined event has not been published, publish it
boolean allJoined = workerMonitor.addJoinedWorkers(joinedWorkers);
if (allJoined && !allJoinedPublished()) {
LOG.info("Publishing AllJoined event when restarting, since it is not previously published.");
allJoined();
}
}
