org.rhq.enterprise.server.scheduler.jobs

Class DataCalcJob

java.lang.Object

org.rhq.enterprise.server.scheduler.jobs.AbstractStatefulJob

org.rhq.enterprise.server.scheduler.jobs.DataCalcJob

All Implemented Interfaces:

org.quartz.Job, org.quartz.StatefulJob

public class DataCalcJob
extends AbstractStatefulJob

This implements StatefulJob (as opposed to Job) because we do not need nor want this job triggered concurrently. That is, we don't want multiple data calc jobs performing the data calc at the same time. The work done in this job used to be performed as part of DataPurgeJob but now, especially since the metric storage and aggregation work is performed against the cassandra storage cluster, and not the RDB, it's been split away to be executed independently. Moreover, there is really no reason to wait for all of the DB maintenance and unrelated data purge before performing out metric calculations. Also, see [BZ 1125439].

Author:

Jay Shaughnessy

Constructor Summary

Constructors

Constructor and Description
DataCalcJob()

Method Summary

Methods

Modifier and Type	Method and Description
static void	calcNow() Schedules a calc job to trigger right now.
void	calculateOOBs(Iterable<AggregateNumericMetric> oneHourAggregates) Calculate the OOB values for the last hour.
void	executeJobCode(org.quartz.JobExecutionContext context) Subclasses should implement this method to perform the actual job.

Methods inherited from class org.rhq.enterprise.server.scheduler.jobs.AbstractStatefulJob

execute

Methods inherited from class java.lang.Object

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

Constructor Detail

DataCalcJob

public DataCalcJob()

Method Detail

calcNow

public static void calcNow()
                    throws Exception

Schedules a calc job to trigger right now. This will not block - it schedules the job to trigger but immediately returns. This method will ensure that no two data calc jobs will execute at the same time (Quartz will ensure this since DataCalcJob is an implementation of StatefulJob).

Throws:

Exception - if failed to schedule the data calc for immediate execution

executeJobCode

public void executeJobCode(org.quartz.JobExecutionContext context)
                    throws org.quartz.JobExecutionException

Description copied from class: AbstractStatefulJob

Subclasses should implement this method to perform the actual job.

Specified by:

executeJobCode in class AbstractStatefulJob

Throws:

org.quartz.JobExecutionException

calculateOOBs

public void calculateOOBs(Iterable<AggregateNumericMetric> oneHourAggregates)

Calculate the OOB values for the last hour. This also removes out-dated ones due to recalculated baselines.