org.apache.flink.streaming.runtime.tasks

Class TimeServiceProvider

java.lang.Object

org.apache.flink.streaming.runtime.tasks.TimeServiceProvider

Direct Known Subclasses:

DefaultTimeServiceProvider, TestTimeServiceProvider

public abstract class TimeServiceProvider
extends Object

Defines the current processing time and handles all related actions, such as register timers for tasks to be executed in the future.

Constructor Summary

Constructors

Constructor and Description
TimeServiceProvider()

Method Summary

Modifier and Type	Method and Description
abstract long	getCurrentProcessingTime() Returns the current processing time.
abstract ScheduledFuture<?>	registerTimer(long timestamp, Runnable target) Registers a task to be executed when (processing) time is timestamp.
abstract void	shutdownService() Shuts down and clean up the timer service provider.

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeServiceProvider

public TimeServiceProvider()

Method Detail

getCurrentProcessingTime

public abstract long getCurrentProcessingTime()

Returns the current processing time.

registerTimer

public abstract ScheduledFuture<?> registerTimer(long timestamp,
                                                 Runnable target)

Registers a task to be executed when (processing) time is timestamp.

Parameters:

timestamp - when the task is to be executed (in processing time)

target - the task to be executed

Returns:

the result to be returned.

shutdownService

public abstract void shutdownService()
                              throws Exception

Shuts down and clean up the timer service provider.

Throws:

Exception