content: /**
   * 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.apache.aurora.scheduler.cron.quartz;
  
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.concurrent.atomic.AtomicLong;
  
  import javax.inject.Inject;
  
  import com.google.common.util.concurrent.AbstractIdleService;
  
  import org.apache.aurora.common.stats.Stats;
  import org.apache.aurora.scheduler.configuration.SanitizedConfiguration;
  import org.apache.aurora.scheduler.cron.CronException;
  import org.apache.aurora.scheduler.cron.SanitizedCronJob;
  import org.apache.aurora.scheduler.storage.Storage;
  import org.apache.aurora.scheduler.storage.entities.IJobConfiguration;
  import org.quartz.Scheduler;
  import org.quartz.SchedulerException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Manager for startup and teardown of Quartz scheduler.
   */
  class CronLifecycle extends AbstractIdleService {
    private static final Logger LOG = LoggerFactory.getLogger(CronLifecycle.class);
  
    private static final AtomicInteger RUNNING_FLAG = Stats.exportInt("quartz_scheduler_running");
    private static final AtomicInteger LOADED_FLAG = Stats.exportInt("cron_jobs_loaded");
    private static final AtomicLong LAUNCH_FAILURES = Stats.exportLong("cron_job_launch_failures");
  
    private final Scheduler scheduler;
    private final CronJobManagerImpl cronJobManager;
    private final Storage storage;
  
    @Inject
    CronLifecycle(
        Scheduler scheduler,
        CronJobManagerImpl cronJobManager,
        Storage storage) {
  
      this.scheduler = requireNonNull(scheduler);
      this.cronJobManager = requireNonNull(cronJobManager);
      this.storage = requireNonNull(storage);
    }
  
    @Override
    protected void startUp() throws SchedulerException {
      LOG.info("Starting Quartz cron scheduler" + scheduler.getSchedulerName() + ".");
      scheduler.start();
      RUNNING_FLAG.set(1);
  
      for (IJobConfiguration job : Storage.Util.fetchCronJobs(storage)) {
        try {
          SanitizedCronJob cronJob = SanitizedCronJob.from(new SanitizedConfiguration(job));
          cronJobManager.scheduleJob(
              cronJob.getCrontabEntry(),
              cronJob.getSanitizedConfig().getJobConfig().getKey());
        } catch (CronException e) {
          logLaunchFailure(job, e);
        }
      }
      LOADED_FLAG.set(1);
    }
  
    private void logLaunchFailure(IJobConfiguration job, Exception e) {
      LAUNCH_FAILURES.incrementAndGet();
      LOG.error("Scheduling failed for recovered job " + job, e);
    }
  
    @Override
    protected void shutDown() throws SchedulerException {
      LOG.info("Shutting down Quartz cron scheduler.");
      scheduler.shutdown();
      RUNNING_FLAG.set(0);
    }
  }
  