package com.epam.wilma.safeguard.monitor;
/*==========================================================================
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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.safeguard.configuration.SafeguardConfigurationAccess;
import com.epam.wilma.safeguard.configuration.domain.PropertyDTO;
/**
* Used to start the scheduling of the queue monitor mechanism.
* The period of the scheduling is read from an external property.
* @author Marton_Sereg
*
*/
@Component
public class JmsQueueMonitor {
private static final String SAFEGUARD_INACTIVE = "0";
private final Logger logger = LoggerFactory.getLogger(JmsQueueMonitor.class);
@Autowired
private TaskScheduler taskScheduler;
@Autowired
private com.epam.wilma.common.helper.CronTriggerFactory cronTriggerFactory;
@Autowired
private JmsQueueMonitorTask jmsQueueMonitorTask;
@Autowired
private SafeguardConfigurationAccess configurationAccess;
private String cronExpression;
/**
* Starts the scheduling of the monitor.
*/
public void startScheduling() {
getCronExpression();
if (!SAFEGUARD_INACTIVE.equals(cronExpression)) {
CronTrigger cronTrigger = createCronTrigger(cronExpression);
taskScheduler.schedule(jmsQueueMonitorTask, cronTrigger);
} else {
logger.info("No safeguard is active based on the property value of 'safeguard.guardperiod' = " + cronExpression + ".");
}
}
private void getCronExpression() {
PropertyDTO properties = configurationAccess.getProperties();
cronExpression = properties.getCronExpression();
}
private CronTrigger createCronTrigger(final String cronExpression) {
return cronTriggerFactory.createCronTrigger(cronExpression);
}
}