public class SystemProcessingTimeService extends ProcessingTimeService
ProcessingTimeService
which assigns as current processing time the result of calling
System.currentTimeMillis()
and registers timers using a ScheduledThreadPoolExecutor
.Constructor and Description |
---|
SystemProcessingTimeService(AsyncExceptionHandler failureHandler,
Object checkpointLock) |
SystemProcessingTimeService(AsyncExceptionHandler task,
Object checkpointLock,
ThreadFactory threadFactory) |
Modifier and Type | Method and Description |
---|---|
protected void |
finalize() |
long |
getCurrentProcessingTime()
Returns the current processing time.
|
boolean |
isTerminated()
Returns true if the service has been shut down, false otherwise.
|
void |
quiesceAndAwaitPending()
This method puts the service into a state where it does not register new timers, but
returns for each call to
ProcessingTimeService.registerTimer(long, ProcessingTimeCallback) only a "mock" future. |
ScheduledFuture<?> |
registerTimer(long timestamp,
ProcessingTimeCallback target)
Registers a task to be executed no sooner than time
timestamp , but without strong
guarantees of order. |
ScheduledFuture<?> |
scheduleAtFixedRate(ProcessingTimeCallback callback,
long initialDelay,
long period)
Registers a task to be executed repeatedly at a fixed rate.
|
void |
shutdownService()
Shuts down and clean up the timer service provider hard and immediately.
|
public SystemProcessingTimeService(AsyncExceptionHandler failureHandler, Object checkpointLock)
public SystemProcessingTimeService(AsyncExceptionHandler task, Object checkpointLock, ThreadFactory threadFactory)
public long getCurrentProcessingTime()
ProcessingTimeService
getCurrentProcessingTime
in class ProcessingTimeService
public ScheduledFuture<?> registerTimer(long timestamp, ProcessingTimeCallback target)
timestamp
, but without strong
guarantees of order.registerTimer
in class ProcessingTimeService
timestamp
- Time when the task is to be enabled (in processing time)target
- The task to be executedpublic ScheduledFuture<?> scheduleAtFixedRate(ProcessingTimeCallback callback, long initialDelay, long period)
ProcessingTimeService
scheduleAtFixedRate
in class ProcessingTimeService
callback
- to be executed after the initial delay and then after each periodinitialDelay
- initial delay to start executing callbackperiod
- after the initial delay after which the callback is executedpublic boolean isTerminated()
ProcessingTimeService
isTerminated
in class ProcessingTimeService
public void quiesceAndAwaitPending() throws InterruptedException
ProcessingTimeService
ProcessingTimeService.registerTimer(long, ProcessingTimeCallback)
only a "mock" future.
Furthermore, the method clears all not yet started timers, and awaits the completion
of currently executing timers.
This method can be used to cleanly shut down the timer service. The using components will not notice that the service is shut down (as for example via exceptions when registering a new timer), but the service will simply not fire any timer any more.
quiesceAndAwaitPending
in class ProcessingTimeService
InterruptedException
public void shutdownService()
ProcessingTimeService
ProcessingTimeService.registerTimer(long, ProcessingTimeCallback)
will result in a hard exception.shutdownService
in class ProcessingTimeService
Copyright © 2014–2018 The Apache Software Foundation. All rights reserved.