content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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 java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.atomic.AtomicBoolean;
  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;
  
  /**
   * 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<JobEntity> expiredJobs = asyncExecutor
                      .getProcessEngineConfiguration()
                      .getCommandExecutor()
                      .execute(new FindExpiredJobsCmd(asyncExecutor.getResetExpiredJobsPageSize()));
  
                  List<String> expiredJobIds = new ArrayList<String>(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();
              }
          }
      }
  }
  