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本文整理了Java中org.apache.helix.manager.zk.zookeeper.ZkClient
类的一些代码示例,展示了ZkClient
类的具体用法。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。ZkClient
类的具体详情如下:
包路径:org.apache.helix.manager.zk.zookeeper.ZkClient
类名称:ZkClient
[英]Abstracts the interaction with zookeeper and allows permanent (not just one time) watches on nodes in ZooKeeper. WARN: Do not use this class directly, use org.apache.helix.manager.zk.ZkClient instead.
[中]抽象与zookeeper的交互,并允许在zookeeper中的节点上进行永久(而不仅仅是一次)监视。警告:不要直接使用此类,请使用org。阿帕奇。螺旋。经理zk。而不是我的客户。
代码示例来源:origin: apache/helix
public Stat writeDataReturnStat(final String path, Object datat, final int expectedVersion) {
long startT = System.currentTimeMillis();
try {
final byte[] data = serialize(datat, path);
checkDataSizeLimit(data);
final Stat stat = (Stat) retryUntilConnected(new Callable<Object>() {
@Override public Object call() throws Exception {
return getConnection().writeDataReturnStat(path, data, expectedVersion);
}
});
record(path, data, startT, ZkClientMonitor.AccessType.WRITE);
return stat;
} catch (Exception e) {
recordFailure(path, ZkClientMonitor.AccessType.WRITE);
throw e;
} finally {
long endT = System.currentTimeMillis();
if (LOG.isTraceEnabled()) {
LOG.trace("setData, path: " + path + ", time: " + (endT - startT) + " ms");
}
}
}
代码示例来源:origin: apache/helix
/**
* Create an ephemeral node.
*
* @param path
* @throws ZkInterruptedException
* if operation was interrupted, or a required reconnection got interrupted
* @throws IllegalArgumentException
* if called from anything except the ZooKeeper event thread
* @throws ZkException
* if any ZooKeeper exception occurred
* @throws RuntimeException
* if any other exception occurs
*/
public void createEphemeral(final String path)
throws ZkInterruptedException, IllegalArgumentException, ZkException, RuntimeException {
create(path, null, CreateMode.EPHEMERAL);
}
代码示例来源:origin: org.apache.helix/helix-core
/**
* Create a persistent node.
*
* @param path
* @throws ZkInterruptedException
* if operation was interrupted, or a required reconnection got interrupted
* @throws IllegalArgumentException
* if called from anything except the ZooKeeper event thread
* @throws ZkException
* if any ZooKeeper exception occurred
* @throws RuntimeException
* if any other exception occurs
*/
public void createPersistent(String path)
throws ZkInterruptedException, IllegalArgumentException, ZkException, RuntimeException {
createPersistent(path, false);
}
代码示例来源:origin: apache/helix
if (isClosed()) {
throw new IllegalStateException("ZkClient already closed!");
acquireEventLock();
try {
setShutdownTrigger(false);
IZkConnection zkConnection = getConnection();
_eventThread = new ZkEventThread(zkConnection.getServers());
_eventThread.start();
if (isManagingZkConnection()) {
zkConnection.connect(watcher);
LOG.debug("Awaiting connection to Zookeeper server");
if (!waitUntilConnected(maxMsToWaitUntilConnected, TimeUnit.MILLISECONDS)) {
throw new ZkTimeoutException(
"Unable to connect to zookeeper server within timeout: " + maxMsToWaitUntilConnected);
if (isConnectionClosed()) {
throw new HelixException(
"Unable to connect to zookeeper server with the specified ZkConnection");
setCurrentState(KeeperState.SyncConnected);
getEventLock().unlock();
close();
代码示例来源:origin: apache/helix
getEventLock().lock();
try {
if (getShutdownTrigger()) {
if (LOG.isDebugEnabled()) {
LOG.debug("ignoring event '{" + event.getType() + " | " + event.getPath()
processStateChanged(event);
processDataOrChildChange(event);
getEventLock().getStateChangedCondition().signalAll();
getEventLock().getZNodeEventCondition().signalAll();
getEventLock().getDataChangedCondition().signalAll();
fireAllEvents();
getEventLock().getZNodeEventCondition().signalAll();
getEventLock().getDataChangedCondition().signalAll();
getEventLock().unlock();
recordStateChange(stateChanged, dataChanged);
代码示例来源:origin: apache/helix
LOG.trace("closing a zkclient. callStack: " + Arrays.asList(calls));
getEventLock().lock();
IZkConnection connection = getConnection();
try {
if (connection == null || _closed) {
return;
setShutdownTrigger(true);
_eventThread.interrupt();
_eventThread.join(2000);
if (isManagingZkConnection()) {
LOG.info("Closing zkclient: " + ((ZkConnection) connection).getZookeeper());
connection.close();
setCurrentState(null);
getEventLock().getStateChangedCondition().signalAll();
if (isManagingZkConnection()) {
connection.close();
getEventLock().unlock();
if (_monitor != null) {
_monitor.unregister();
代码示例来源:origin: apache/helix
@Override public Object call() throws Exception {
getConnection().exists(path, true);
return null;
}
});
代码示例来源:origin: org.apache.helix/helix-core
acquireEventLock();
try {
setShutdownTrigger(false);
_eventThread = new ZkEventThread(_connection.getServers());
_eventThread.start();
if (!waitUntilConnected(maxMsToWaitUntilConnected, TimeUnit.MILLISECONDS)) {
throw new ZkTimeoutException(
"Unable to connect to zookeeper server within timeout: " + maxMsToWaitUntilConnected);
getEventLock().unlock();
close();
代码示例来源:origin: apache/helix
public long getCreationTime(String path) {
acquireEventLock();
try {
return getConnection().getCreateTime(path);
} catch (KeeperException e) {
throw ZkException.create(e);
} catch (InterruptedException e) {
throw new ZkInterruptedException(e);
} finally {
getEventLock().unlock();
}
}
代码示例来源:origin: org.apache.helix/helix-core
public boolean waitUntilExists(String path, TimeUnit timeUnit, long time)
throws ZkInterruptedException {
Date timeout = new Date(System.currentTimeMillis() + timeUnit.toMillis(time));
if (LOG.isDebugEnabled()) {
LOG.debug("Waiting until znode '" + path + "' becomes available.");
}
if (exists(path)) {
return true;
}
acquireEventLock();
try {
while (!exists(path, true)) {
boolean gotSignal = getEventLock().getZNodeEventCondition().awaitUntil(timeout);
if (!gotSignal) {
return false;
}
}
return true;
} catch (InterruptedException e) {
throw new ZkInterruptedException(e);
} finally {
getEventLock().unlock();
}
}
代码示例来源:origin: apache/helix
private void reconnect() {
getEventLock().lock();
try {
ZkConnection connection = ((ZkConnection) getConnection());
connection.reconnect(this);
} catch (InterruptedException e) {
throw new ZkInterruptedException(e);
} finally {
getEventLock().unlock();
}
}
代码示例来源:origin: apache/helix
public void setCurrentState(KeeperState currentState) {
getEventLock().lock();
try {
_currentState = currentState;
} finally {
getEventLock().unlock();
}
}
代码示例来源:origin: org.apache.helix/helix-core
public boolean waitForKeeperState(KeeperState keeperState, long time, TimeUnit timeUnit)
throws ZkInterruptedException {
if (_zookeeperEventThread != null && Thread.currentThread() == _zookeeperEventThread) {
throw new IllegalArgumentException("Must not be done in the zookeeper event thread.");
}
Date timeout = new Date(System.currentTimeMillis() + timeUnit.toMillis(time));
LOG.debug("Waiting for keeper state " + keeperState);
acquireEventLock();
try {
boolean stillWaiting = true;
while (_currentState != keeperState) {
if (!stillWaiting) {
return false;
}
stillWaiting = getEventLock().getStateChangedCondition().awaitUntil(timeout);
}
LOG.debug("State is " + (_currentState == null ? "CLOSED" : _currentState));
return true;
} catch (InterruptedException e) {
throw new ZkInterruptedException(e);
} finally {
getEventLock().unlock();
}
}
代码示例来源:origin: apache/helix
if (isClosed()) {
throw new IllegalStateException("ZkClient already closed!");
final ZkConnection zkConnection = (ZkConnection) getConnection();
waitForRetry();
} catch (SessionExpiredException e) {
waitForRetry();
} catch (KeeperException e) {
throw ZkException.create(e);
代码示例来源:origin: org.apache.helix/helix-core
LOG.trace("closing a zkclient. callStack: " + Arrays.asList(calls));
getEventLock().lock();
try {
if (_connection == null || _closed) {
setShutdownTrigger(true);
_eventThread.interrupt();
_eventThread.join(2000);
setCurrentState(null);
getEventLock().getStateChangedCondition().signalAll();
getEventLock().unlock();
if (_monitor != null) {
_monitor.unregister();
代码示例来源:origin: org.apache.helix/helix-core
/**
* Delete the path as well as all its children.
* @param path
* @throws HelixException
*/
public void deleteRecursively(String path) throws HelixException {
List<String> children;
try {
children = getChildren(path, false);
} catch (ZkNoNodeException e) {
// if the node to be deleted does not exist, treat it as success.
return;
}
for (String subPath : children) {
deleteRecursively(path + "/" + subPath);
}
// delete() function call will return true if successful, false if the path does not
// exist (in this context, it should be treated as successful), and throw exception
// if there is any other failure case.
try {
delete(path);
} catch (Exception e) {
LOG.error("Failed to delete " + path, e);
throw new HelixException("Failed to delete " + path, e);
}
}
代码示例来源:origin: org.apache.helix/helix-core
final ZkConnection zkConnection = (ZkConnection) getConnection();
waitForRetry();
} catch (SessionExpiredException e) {
waitForRetry();
} catch (KeeperException e) {
throw ZkException.create(e);
代码示例来源:origin: apache/helix
throws ZkInterruptedException, IllegalArgumentException, ZkException, RuntimeException {
try {
create(path, null, acl, CreateMode.PERSISTENT);
} catch (ZkNodeExistsException e) {
if (!createParents) {
createPersistent(parentDir, createParents, acl);
createPersistent(path, createParents, acl);
代码示例来源:origin: apache/helix
/**
* Delete the path as well as all its children.
* This method is deprecated, please use {@link #deleteRecursively(String)}} instead
* @param path ZK path
* @return true if successfully deleted all children, and the given path, else false
*/
@Deprecated
public boolean deleteRecursive(String path) {
try {
deleteRecursively(path);
return true;
} catch (HelixException e) {
LOG.error("Failed to recursively delete path " + path, e);
return false;
}
}
代码示例来源:origin: org.apache.helix/helix-core
protected ZkClient(IZkConnection zkConnection, int connectionTimeout, long operationRetryTimeout,
PathBasedZkSerializer zkSerializer, String monitorType, String monitorKey,
String monitorInstanceName, boolean monitorRootPathOnly) {
if (zkConnection == null) {
throw new NullPointerException("Zookeeper connection is null!");
}
_connection = zkConnection;
_pathBasedZkSerializer = zkSerializer;
_operationRetryTimeoutInMillis = operationRetryTimeout;
connect(connectionTimeout, this);
// initiate monitor
try {
if (monitorKey != null && !monitorKey.isEmpty() && monitorType != null && !monitorType
.isEmpty()) {
_monitor =
new ZkClientMonitor(monitorType, monitorKey, monitorInstanceName, monitorRootPathOnly);
_monitor.setZkEventThread(_eventThread);
} else {
LOG.info("ZkClient monitor key or type is not provided. Skip monitoring.");
}
} catch (JMException e) {
LOG.error("Error in creating ZkClientMonitor", e);
}
}
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