Package org.drools.core.time.impl

Class PseudoClockScheduler

java.lang.Object

org.drools.core.time.impl.PseudoClockScheduler

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, InternalSchedulerService, SchedulerService, SessionPseudoClock, TimerService, org.kie.api.time.SessionClock, org.kie.api.time.SessionPseudoClock

public class PseudoClockScheduler
extends java.lang.Object
implements TimerService, SessionPseudoClock, java.io.Externalizable, InternalSchedulerService

A PseudoClockScheduler is a scheduler based on a user controlled clock that allows the user to explicitly control current time.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.concurrent.atomic.AtomicLong	idCounter
protected java.util.PriorityQueue<TimerJobInstance>	queue
protected java.util.concurrent.atomic.AtomicLong	timer

Constructor Summary

Constructors

Constructor	Description
PseudoClockScheduler()

Method Summary

Modifier and Type	Method	Description
long	advanceTime(long amount, java.util.concurrent.TimeUnit unit)
long	getCurrentTime()	Returns the current time from the scheduler clock
TimerJobFactoryManager	getTimerJobFactoryManager()
java.util.Collection<TimerJobInstance>	getTimerJobInstances(long id)	This method may return null for some TimerService implementations that do not want the overhead of maintain this.
long	getTimeToNextJob()	Returns the number of time units (usually ms) to the next scheduled job
void	internalSchedule(TimerJobInstance timerJobInstance)
void	readExternal(java.io.ObjectInput in)
void	removeJob(org.drools.base.time.JobHandle jobHandle)	Remove the job identified by the given job handle from the scheduled queue
void	reset()	Reset this service
org.drools.base.time.JobHandle	scheduleJob(Job job, JobContext ctx, org.drools.base.time.Trigger trigger)	Schedule a job for later execution
void	setStartupTime(long i)
void	setTimerJobFactoryManager(TimerJobFactoryManager timerJobFactoryManager)
void	shutdown()	Shuts the service down
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class java.lang.Object

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

Field Detail

timer

protected java.util.concurrent.atomic.AtomicLong timer

queue

protected java.util.PriorityQueue<TimerJobInstance> queue

idCounter

protected java.util.concurrent.atomic.AtomicLong idCounter

Constructor Detail

PseudoClockScheduler

public PseudoClockScheduler()

Method Detail

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException

java.lang.ClassNotFoundException

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException

setTimerJobFactoryManager

public void setTimerJobFactoryManager(TimerJobFactoryManager timerJobFactoryManager)

Specified by:

setTimerJobFactoryManager in interface TimerService

getTimerJobFactoryManager

public TimerJobFactoryManager getTimerJobFactoryManager()

Specified by:

getTimerJobFactoryManager in interface TimerService

getCurrentTime

public long getCurrentTime()

Description copied from interface: TimerService

Returns the current time from the scheduler clock

Specified by:

getCurrentTime in interface org.kie.api.time.SessionClock

Specified by:

getCurrentTime in interface TimerService

Returns:

the current timestamp

scheduleJob

public org.drools.base.time.JobHandle scheduleJob(Job job,
                                                  JobContext ctx,
                                                  org.drools.base.time.Trigger trigger)

Description copied from interface: SchedulerService

Schedule a job for later execution

Specified by:

scheduleJob in interface SchedulerService

Returns:

internalSchedule

public void internalSchedule(TimerJobInstance timerJobInstance)

Specified by:

internalSchedule in interface InternalSchedulerService

removeJob

public void removeJob(org.drools.base.time.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

advanceTime

public long advanceTime(long amount,
                        java.util.concurrent.TimeUnit unit)

Specified by:

advanceTime in interface org.kie.api.time.SessionPseudoClock

setStartupTime

public void setStartupTime(long i)

reset

public void reset()

Description copied from interface: TimerService

Reset this service

Specified by:

reset in interface TimerService

shutdown

public void shutdown()

Description copied from interface: TimerService

Shuts the service down

Specified by:

shutdown in interface TimerService

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

getTimerJobInstances

public java.util.Collection<TimerJobInstance> getTimerJobInstances(long id)

Description copied from interface: TimerService

This method may return null for some TimerService implementations that do not want the overhead of maintain this.

Specified by:

getTimerJobInstances in interface TimerService

Returns: