package com.epam.wilma.sequence.maintainer;
/*==========================================================================
Copyright 2013-2017 EPAM Systems
This file is part of Wilma.
Wilma is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Wilma is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Wilma. If not, see <http://www.gnu.org/licenses/>.
===========================================================================*/
import java.util.Date;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
import com.epam.wilma.common.helper.CronTriggerFactory;
import com.epam.wilma.domain.exception.SchedulingCannotBeStartedException;
import com.epam.wilma.sequence.maintainer.configuration.SequenceMaintainerConfigurationAccess;
import com.epam.wilma.sequence.maintainer.configuration.domain.SequenceProperties;
/**
* This class is responsible for maintaining and scheduling the cleaning process of sequence module.
* @author Tibor_Kovacs
*
*/
@Component
public class SequenceMaintainer {
private String cronExpression;
@Autowired
private TaskScheduler taskScheduler;
@Autowired
private CronTriggerFactory cronTriggerFactory;
@Autowired
private SequenceMaintainerConfigurationAccess configurationAccess;
@Autowired
private SequenceCleanerTask maintainerTask;
/**
* Starts the scheduling of the {@link SequenceCleanerTask}.
*/
public void startScheduling() {
CronTrigger cronTrigger = createCronTrigger();
if (maintainerTask != null) {
taskScheduler.schedule(maintainerTask, cronTrigger);
} else {
throw new SchedulingCannotBeStartedException("Scheduling cannot be started, in Sequence module.");
}
}
/**
* Runs the maintenance task when invoked.
*/
public void runOnDemand() {
taskScheduler.schedule(maintainerTask, new Date());
}
private CronTrigger createCronTrigger() {
getCronExpression();
return cronTriggerFactory.createCronTrigger(cronExpression);
}
private void getCronExpression() {
SequenceProperties properties = configurationAccess.getProperties();
cronExpression = properties.getCronExpression();
}
}