/* 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 org.activiti.engine.impl.cmd;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.List;
import org.activiti.engine.impl.Page;
import org.activiti.engine.impl.asyncexecutor.AcquiredJobEntities;
import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.JobEntity;
/**
* @author Tijs Rademakers
*/
public class AcquireTimerJobsCmd implements Command<AcquiredJobEntities> {
private final String lockOwner;
private final int lockTimeInMillis;
private final int maxJobsPerAcquisition;
public AcquireTimerJobsCmd(String lockOwner, int lockTimeInMillis, int maxJobsPerAcquisition) {
this.lockOwner = lockOwner;
this.lockTimeInMillis = lockTimeInMillis;
this.maxJobsPerAcquisition = maxJobsPerAcquisition;
}
public AcquiredJobEntities execute(CommandContext commandContext) {
AcquiredJobEntities acquiredJobs = new AcquiredJobEntities();
List<JobEntity> jobs = commandContext
.getJobEntityManager()
.findNextTimerJobsToExecute(new Page(0, maxJobsPerAcquisition));
for (JobEntity job: jobs) {
if (job != null && !acquiredJobs.contains(job.getId())) {
lockJob(commandContext, job, lockOwner, lockTimeInMillis);
acquiredJobs.addJob(job);
}
}
return acquiredJobs;
}
protected void lockJob(CommandContext commandContext, JobEntity job, String lockOwner, int lockTimeInMillis) {
job.setLockOwner(lockOwner);
GregorianCalendar gregorianCalendar = new GregorianCalendar();
gregorianCalendar.setTime(commandContext.getProcessEngineConfiguration().getClock().getCurrentTime());
gregorianCalendar.add(Calendar.MILLISECOND, lockTimeInMillis);
job.setLockExpirationTime(gregorianCalendar.getTime());
}
}