org.drools.time.impl
Class JDKTimerService

java.lang.Object
  org.drools.time.impl.JDKTimerService

All Implemented Interfaces:

SchedulerService, org.drools.time.SessionClock, TimerService

public class JDKTimerService
extends Object
implements TimerService, org.drools.time.SessionClock

A default Scheduler implementation that uses the JDK built-in ScheduledThreadPoolExecutor as the scheduler and the system clock as the clock.

Nested Class Summary

static class	JDKTimerService.JDKCallableJob
static class	JDKTimerService.JDKJobHandle

Field Summary

protected ScheduledThreadPoolExecutor

scheduler

Constructor Summary

JDKTimerService()

JDKTimerService(int size)

Method Summary

protected Callable<Void>	createCallableJob(Job job, JobContext ctx, Trigger trigger, JDKTimerService.JDKJobHandle handle, ScheduledThreadPoolExecutor scheduler)
long	getCurrentTime() Returns the current time from the scheduler clock
long	getTimeToNextJob() Returns the number of time units (usually ms) to the next scheduled job
boolean	removeJob(JobHandle jobHandle) Remove the job identified by the given job handle from the scheduled queue
JobHandle	scheduleJob(Job job, JobContext ctx, Trigger trigger) Schedule a job for later execution
void	shutdown() Shuts the service down

Methods inherited from class java.lang.Object

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

Field Detail

scheduler

protected ScheduledThreadPoolExecutor scheduler

Constructor Detail

JDKTimerService

public JDKTimerService()

JDKTimerService

public JDKTimerService(int size)

Method Detail

getCurrentTime

public long getCurrentTime()

Description copied from interface: TimerService

Returns the current time from the scheduler clock

Specified by:

getCurrentTime in interface org.drools.time.SessionClock

Specified by:

getCurrentTime in interface TimerService

Returns:

the current timestamp

shutdown

public void shutdown()

Description copied from interface: TimerService

Shuts the service down

Specified by:

shutdown in interface TimerService

scheduleJob

public JobHandle scheduleJob(Job job,
                             JobContext ctx,
                             Trigger trigger)

Description copied from interface: SchedulerService

Schedule a job for later execution

Specified by:

scheduleJob in interface SchedulerService

Returns:

createCallableJob

protected Callable<Void> createCallableJob(Job job,
                                           JobContext ctx,
                                           Trigger trigger,
                                           JDKTimerService.JDKJobHandle handle,
                                           ScheduledThreadPoolExecutor scheduler)

removeJob

public boolean removeJob(JobHandle jobHandle)

Description copied from interface: SchedulerService

Remove the job identified by the given job handle from the scheduled queue

Specified by:

removeJob in interface SchedulerService

Parameters:

jobHandle - the job identity handle

Returns:

getTimeToNextJob

public long getTimeToNextJob()

Description copied from interface: TimerService

Returns the number of time units (usually ms) to the next scheduled job

Specified by:

getTimeToNextJob in interface TimerService

Returns:

the number of time units until the next scheduled job or -1 if there is no job scheduled