Package com.storedobject.core

Class DataChangeProcessor

java.lang.Object

com.storedobject.job.Job

com.storedobject.job.DaemonJob

com.storedobject.core.DataChangeProcessor

public final class DataChangeProcessor
extends DaemonJob

The DataChangeProcessor class extends the DaemonJob class and represents a job that processes data changes. It runs in the background and its execute method is invoked only once. The execute method may be invoked again if an error occurred during the previous run or the isActive() method returns false when it is due again. The DataChangeProcessor class should be instantiated with a schedule defined for this job.

Author:

Syam

Constructor Summary

Constructors

Constructor	Description
DataChangeProcessor(Schedule schedule)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	execute()	Executes the DataChangeProcessor job.
boolean	isActive()	Check if the Job is still active or not.
void	shutdown()	This method is invoked when the system is shutting down.

Methods inherited from class com.storedobject.job.Job

alert, clean, getDevice, getStatus, getTransactionManager, log

Methods inherited from class java.lang.Object

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

Constructor Details

DataChangeProcessor

public DataChangeProcessor(Schedule schedule)

Constructor.

Parameters:

schedule - Schedule defined for this Job.

Method Details

execute

public void execute()
             throws Throwable

Executes the DataChangeProcessor job. This method is overridden from the super class DaemonJob. It is called to perform the execution of the job. The execute method is invoked only once and runs in the background. If an error occurred during the previous run or the isActive() method returns false when it is due again, the execute method may be invoked again.

Specified by:

execute in class Job

Throws:

Throwable - if there is an error during the execution of the job

isActive

public boolean isActive()

Description copied from class: DaemonJob

Check if the Job is still active or not. (The default implementation always returns true). If this method returns false, the Job Scheduler will invoke the Job.execute() method again when it is due for the next run.

Overrides:

isActive in class DaemonJob

Returns:

True/false

shutdown

public void shutdown()

Description copied from class: Job

This method is invoked when the system is shutting down. It will be called even if the job is inactive at that time. (The default implementation does nothing).

Overrides:

shutdown in class Job