/*
* Copyright 2012 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.nokia.dempsy.output;
import java.text.ParseException;
import org.quartz.CronScheduleBuilder;
import org.quartz.JobDetail;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;
/**
* The Class CronOutputScheduler.
* This class executes @Output method on MPs based on provided cron time expression (example: '*\/1 * * * * ?', run job at every one sec)
*
*/
public class CronOutputSchedule extends AbstractOutputSchedule implements OutputExecuter {
/** The cron expression. */
private String cronExpression;
/**
* Instantiates a new cron output scheduler.
*
* @param cronExpression the cron expression
*/
public CronOutputSchedule(String cronExpression) {
this.cronExpression = cronExpression;
}
/* (non-Javadoc)
* @see com.nokia.dempsy.output.OutputExecuter#start()
*/
public void start() {
try {
JobDetail jobDetail = super.getJobDetail();
Trigger trigger = getCronTrigger(cronExpression);
scheduler = StdSchedulerFactory.getDefaultScheduler();
scheduler.scheduleJob(jobDetail, trigger);
scheduler.start();
} catch (SchedulerException se) {
logger.error("Error occurred while starting the cron scheduler : " + se.getMessage(), se);
}
}
/**
* Gets the cron trigger.
*
* @param cronExpression the cron expression
* @return the cron trigger
*/
private Trigger getCronTrigger(String cronExpression) {
CronScheduleBuilder cronScheduleBuilder = null;
Trigger cronTrigger = null;
try {
cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cronExpression);
cronScheduleBuilder.withMisfireHandlingInstructionFireAndProceed();
TriggerBuilder<Trigger> cronTtriggerBuilder = TriggerBuilder.newTrigger();
cronTtriggerBuilder.withSchedule(cronScheduleBuilder);
cronTrigger = cronTtriggerBuilder.build();
} catch (ParseException pe) {
logger.error("Error occurred while builiding the cronTrigger : " + pe.getMessage(), pe);
}
return cronTrigger;
}
}