Package org.apache.activemq.broker.scheduler

Class JobSchedulerFacade

java.lang.Object

org.apache.activemq.broker.scheduler.JobSchedulerFacade

All Implemented Interfaces:

JobScheduler

public class JobSchedulerFacade
extends Object
implements JobScheduler

A wrapper for instances of the JobScheduler interface that ensures that methods provides safe and sane return values and can deal with null values being passed in etc. Provides a measure of safety when using unknown implementations of the JobSchedulerStore which might not always do the right thing.

Method Summary

Modifier and Type	Method	Description
void	addListener(JobListener l)	Add a Job listener which will receive events related to scheduled jobs.
List<Job>	getAllJobs()	Get all the outstanding Jobs
List<Job>	getAllJobs(long start, long finish)	Get all outstanding jobs due to run between start and finish
String	getName()
List<Job>	getNextScheduleJobs()	Get all the jobs scheduled to run next
long	getNextScheduleTime()	Get the next time jobs will be fired
void	remove(long time)	remove all jobs scheduled to run at this time
void	remove(String jobId)	remove a job with the matching jobId
void	removeAllJobs()	remove all the Jobs from the scheduler
void	removeAllJobs(long start, long finish)	remove all the Jobs from the scheduler that are due between the start and finish times
void	removeListener(JobListener l)	remove a JobListener that was previously registered.
void	schedule(String jobId, org.apache.activemq.util.ByteSequence payload, long delay)	Add a job to be scheduled
void	schedule(String jobId, org.apache.activemq.util.ByteSequence payload, String cronEntry)	Add a job to be scheduled
void	schedule(String jobId, org.apache.activemq.util.ByteSequence payload, String cronEntry, long start, long period, int repeat)	Add a job to be scheduled
void	startDispatching()	Starts dispatch of scheduled Jobs to registered listeners.
void	stopDispatching()	Stops dispatching of scheduled Jobs to registered listeners.

Methods inherited from class java.lang.Object

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

Method Details

addListener

public void addListener(JobListener l)
                 throws Exception

Description copied from interface: JobScheduler

Add a Job listener which will receive events related to scheduled jobs.

Specified by:

addListener in interface JobScheduler

Parameters:

l - The job listener to add.

Throws:

Exception

getAllJobs

public List<Job> getAllJobs()
                     throws Exception

Description copied from interface: JobScheduler

Get all the outstanding Jobs

Specified by:

getAllJobs in interface JobScheduler

Returns:

a list of all jobs

Throws:

Exception

getAllJobs

public List<Job> getAllJobs(long start,
 long finish)
                     throws Exception

Description copied from interface: JobScheduler

Get all outstanding jobs due to run between start and finish

Specified by:

getAllJobs in interface JobScheduler

Returns:

a list of jobs

Throws:

Exception

getName

public String getName()
               throws Exception

Specified by:

getName in interface JobScheduler

Returns:

the name of the scheduler

Throws:

Exception

getNextScheduleJobs

public List<Job> getNextScheduleJobs()
                              throws Exception

Description copied from interface: JobScheduler

Get all the jobs scheduled to run next

Specified by:

getNextScheduleJobs in interface JobScheduler

Returns:

a list of jobs that will be scheduled next

Throws:

Exception

getNextScheduleTime

public long getNextScheduleTime()
                         throws Exception

Description copied from interface: JobScheduler

Get the next time jobs will be fired

Specified by:

getNextScheduleTime in interface JobScheduler

Returns:

the time in milliseconds

Throws:

Exception

remove

public void remove(long time)
            throws Exception

Description copied from interface: JobScheduler

remove all jobs scheduled to run at this time

Specified by:

remove in interface JobScheduler

Parameters:

time - The UTC time to use to remove a batch of scheduled Jobs.

Throws:

Exception

remove

public void remove(String jobId)
            throws Exception

Description copied from interface: JobScheduler

remove a job with the matching jobId

Specified by:

remove in interface JobScheduler

Parameters:

jobId - The unique Job Id to search for and remove from the scheduled set of jobs.

Throws:

Exception - if an error occurs while removing the Job.

removeAllJobs

public void removeAllJobs()
                   throws Exception

Description copied from interface: JobScheduler

remove all the Jobs from the scheduler

Specified by:

removeAllJobs in interface JobScheduler

Throws:

Exception

removeAllJobs

public void removeAllJobs(long start,
 long finish)
                   throws Exception

Description copied from interface: JobScheduler

remove all the Jobs from the scheduler that are due between the start and finish times

Specified by:

removeAllJobs in interface JobScheduler

Parameters:

start - time in milliseconds

finish - time in milliseconds

Throws:

Exception

removeListener

public void removeListener(JobListener l)
                    throws Exception

Description copied from interface: JobScheduler

remove a JobListener that was previously registered. If the given listener is not in the registry this method has no effect.

Specified by:

removeListener in interface JobScheduler

Parameters:

l - The listener that should be removed from the listener registry.

Throws:

Exception

schedule

public void schedule(String jobId,
 org.apache.activemq.util.ByteSequence payload,
 long delay)
              throws Exception

Description copied from interface: JobScheduler

Add a job to be scheduled

Specified by:

schedule in interface JobScheduler

Parameters:

jobId - a unique identifier for the job

payload - the message to be sent when the job is scheduled

delay - the time in milliseconds before the job will be run

Throws:

Exception - if an error occurs while scheduling the Job.

schedule

public void schedule(String jobId,
 org.apache.activemq.util.ByteSequence payload,
 String cronEntry,
 long start,
 long period,
 int repeat)
              throws Exception

Description copied from interface: JobScheduler

Add a job to be scheduled

Specified by:

schedule in interface JobScheduler

Parameters:

jobId - a unique identifier for the job

payload - the message to be sent when the job is scheduled

cronEntry - cron entry

start - time in ms to wait before scheduling

period - the time in milliseconds between successive executions of the Job

repeat - the number of times to execute the job - less than 0 will be repeated forever

Throws:

Exception

schedule

public void schedule(String jobId,
 org.apache.activemq.util.ByteSequence payload,
 String cronEntry)
              throws Exception

Description copied from interface: JobScheduler

Add a job to be scheduled

Specified by:

schedule in interface JobScheduler

Parameters:

jobId - a unique identifier for the job

payload - the message to be sent when the job is scheduled

cronEntry - The cron entry to use to schedule this job.

Throws:

Exception - if an error occurs while scheduling the Job.

startDispatching

public void startDispatching()
                      throws Exception

Description copied from interface: JobScheduler

Starts dispatch of scheduled Jobs to registered listeners. Any listener added after the start dispatch method can miss jobs so its important to register critical listeners before the start of job dispatching.

Specified by:

startDispatching in interface JobScheduler

Throws:

Exception

stopDispatching

public void stopDispatching()
                     throws Exception

Description copied from interface: JobScheduler

Stops dispatching of scheduled Jobs to registered listeners.

Specified by:

stopDispatching in interface JobScheduler

Throws:

Exception