org.activiti.engine.impl.asyncexecutor.ResetExpiredJobsRunnable Maven / Gradle / Ivy
/* 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.asyncexecutor;
import org.activiti.engine.ActivitiOptimisticLockingException;
import org.activiti.engine.impl.persistence.entity.JobEntity;
import org.activiti.engine.runtime.Job;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Runnable that checks the {@link Job} entities periodically for 'expired' jobs.
*
* When a job is executed, it is first locked (lock owner and lock time is set).
* A job is expired when this lock time is exceeded. This can happen when an executor
* goes down before completing a task.
*
* This runnable will find such jobs and reset them, so they can be picked up again.
*
*/
public class ResetExpiredJobsRunnable implements Runnable {
private static Logger log = LoggerFactory.getLogger(ResetExpiredJobsRunnable.class);
protected final AsyncExecutor asyncExecutor;
protected volatile boolean isInterrupted;
protected final Object MONITOR = new Object();
protected final AtomicBoolean isWaiting = new AtomicBoolean(false);
public ResetExpiredJobsRunnable(AsyncExecutor asyncExecutor) {
this.asyncExecutor = asyncExecutor;
}
public synchronized void run() {
log.info("{} starting to reset expired jobs");
Thread.currentThread().setName("activiti-reset-expired-jobs");
while (!isInterrupted) {
try {
List expiredJobs = asyncExecutor.getProcessEngineConfiguration().getCommandExecutor()
.execute(new FindExpiredJobsCmd(asyncExecutor.getResetExpiredJobsPageSize()));
List expiredJobIds = new ArrayList(expiredJobs.size());
for (JobEntity expiredJob : expiredJobs) {
expiredJobIds.add(expiredJob.getId());
}
if (expiredJobIds.size() > 0) {
asyncExecutor.getProcessEngineConfiguration().getCommandExecutor()
.execute(new ResetExpiredJobsCmd(expiredJobIds));
}
} catch (Throwable e) {
if (e instanceof ActivitiOptimisticLockingException) {
log.debug("Optmistic lock exception while resetting locked jobs", e);
} else {
log.error("exception during resetting expired jobs", e.getMessage(), e);
}
}
// Sleep
try {
synchronized (MONITOR) {
if (!isInterrupted) {
isWaiting.set(true);
MONITOR.wait(asyncExecutor.getResetExpiredJobsInterval());
}
}
} catch (InterruptedException e) {
if (log.isDebugEnabled()) {
log.debug("async reset expired jobs wait interrupted");
}
} finally {
isWaiting.set(false);
}
}
log.info("{} stopped resetting expired jobs");
}
public void stop() {
synchronized (MONITOR) {
isInterrupted = true;
if (isWaiting.compareAndSet(true, false)) {
MONITOR.notifyAll();
}
}
}
}