org.apache.hadoop.yarn.util

クラス AbstractLivelinessMonitor<O>

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.yarn.util.AbstractLivelinessMonitor<O>

すべての実装されたインタフェース:

Closeable, AutoCloseable, Service

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public abstract class AbstractLivelinessMonitor<O>
extends AbstractService

A simple liveliness monitor with which clients can register, trust the component to monitor liveliness, get a call-back on expiry and then finally unregister.

フィールドのサマリー

フィールド

修飾子とタイプ	フィールドと説明
static int	DEFAULT_EXPIRE

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
AbstractLivelinessMonitor(String name)
AbstractLivelinessMonitor(String name, Clock clock)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
protected abstract void	expire(O ob)
void	receivedPing(O ob)
void	register(O ob)
void	resetTimer()
protected void	serviceStart() Actions called during the INITED to STARTED transition.
protected void	serviceStop() Actions called during the transition to the STOPPED state.
protected void	setExpireInterval(int expireInterval)
protected void	setMonitorInterval(int monitorInterval)
void	unregister(O ob)

クラスから継承されたメソッド org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, serviceInit, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

クラスから継承されたメソッド java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

フィールドの詳細

DEFAULT_EXPIRE

public static final int DEFAULT_EXPIRE

関連項目:

定数フィールド値

コンストラクタの詳細

AbstractLivelinessMonitor

public AbstractLivelinessMonitor(String name,
                                 Clock clock)

AbstractLivelinessMonitor

public AbstractLivelinessMonitor(String name)

メソッドの詳細

serviceStart

protected void serviceStart()
                     throws Exception

クラスからコピーされた説明: AbstractService

Actions called during the INITED to STARTED transition. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.start() prevents re-entrancy.

オーバーライド:

serviceStart クラス内 AbstractService

例外:

Exception - if needed -these will be caught, wrapped, and trigger a service stop

serviceStop

protected void serviceStop()
                    throws Exception

クラスからコピーされた説明: AbstractService

Actions called during the transition to the STOPPED state. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.stop() prevents re-entrancy. Implementations MUST write this to be robust against failures, including checks for null references -and for the first failure to not stop other attempts to shut down parts of the service.

オーバーライド:

serviceStop クラス内 AbstractService

例外:

Exception - if needed -these will be caught and logged.

expire

protected abstract void expire(O ob)

setExpireInterval

protected void setExpireInterval(int expireInterval)

setMonitorInterval

protected void setMonitorInterval(int monitorInterval)

receivedPing

public void receivedPing(O ob)

register

public void register(O ob)

unregister

public void unregister(O ob)

resetTimer

public void resetTimer()