Package org.apache.flink.runtime.taskexecutor.slot

Class DefaultTimerService<K>

java.lang.Object

org.apache.flink.runtime.taskexecutor.slot.DefaultTimerService<K>

Type Parameters:

K - Type of the key

All Implemented Interfaces:

TimerService<K>

public class DefaultTimerService<K>
extends Object
implements TimerService<K>

Service to register timeouts for a given key. The timeouts are identified by a ticket so that newly registered timeouts for the same key can be distinguished from older timeouts.

Constructor Summary

Constructors

Constructor	Description
DefaultTimerService(ScheduledExecutorService scheduledExecutorService, long shutdownTimeout)

Method Summary

Modifier and Type	Method	Description
boolean	isValid(K key, UUID ticket)	Check whether the timeout for the given key and ticket is still valid (not yet unregistered and not yet overwritten).
void	registerTimeout(K key, long delay, TimeUnit unit)	Register a timeout for the given key which shall occur in the given delay.
void	start(TimeoutListener<K> initialTimeoutListener)	Starts this timer service.
void	stop()	Stops this timer service.
protected void	unregisterAllTimeouts()	Unregister all timeouts.
void	unregisterTimeout(K key)	Unregister the timeout for the given key.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultTimerService

public DefaultTimerService(ScheduledExecutorService scheduledExecutorService,
                           long shutdownTimeout)

Method Detail

start

public void start(TimeoutListener<K> initialTimeoutListener)

Description copied from interface: TimerService

Starts this timer service.

Specified by:

start in interface TimerService<K>

Parameters:

initialTimeoutListener - listener for timeouts that have fired

stop

public void stop()

Description copied from interface: TimerService

Stops this timer service.

Specified by:

stop in interface TimerService<K>

registerTimeout

public void registerTimeout(K key,
                            long delay,
                            TimeUnit unit)

Description copied from interface: TimerService

Register a timeout for the given key which shall occur in the given delay.

Specified by:

registerTimeout in interface TimerService<K>

Parameters:

key - for which to register the timeout

delay - until the timeout

unit - of the timeout delay

unregisterTimeout

public void unregisterTimeout(K key)

Description copied from interface: TimerService

Unregister the timeout for the given key.

Specified by:

unregisterTimeout in interface TimerService<K>

Parameters:

key - for which to unregister the timeout

unregisterAllTimeouts

protected void unregisterAllTimeouts()

Unregister all timeouts.

isValid

public boolean isValid(K key,
                       UUID ticket)

Description copied from interface: TimerService

Check whether the timeout for the given key and ticket is still valid (not yet unregistered and not yet overwritten).

Specified by:

isValid in interface TimerService<K>

Parameters:

key - for which to check the timeout

ticket - of the timeout

Returns:

True if the timeout ticket is still valid; otherwise false