content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.ambari.server.scheduler;
  
  import java.util.List;
  
  import org.apache.ambari.server.AmbariException;
  import org.quartz.JobDetail;
  import org.quartz.JobKey;
  import org.quartz.SchedulerException;
  import org.quartz.Trigger;
  
  public interface ExecutionScheduler {
    /**
     * Initialize and start the scheduler to accept jobs.
     * @throws AmbariException
     */
    void startScheduler(Integer delay) throws AmbariException;
  
    /**
     * Shutdown the scheduler threads and do not accept any more jobs.
     * @throws AmbariException
     */
    void stopScheduler() throws AmbariException;
  
    /**
     * Add a trigger to the execution scheduler
     * @param trigger
     * @throws SchedulerException
     */
    void scheduleJob(Trigger trigger) throws SchedulerException;
  
    /**
     * Persist job data
     * @param job
     * @throws SchedulerException
     */
    void addJob(JobDetail job) throws SchedulerException;
  
  
    /**
     * Delete the identified Job from the Scheduler - and any associated Triggers.
     * @param jobKey
     * @throws SchedulerException
     */
    void deleteJob(JobKey jobKey) throws SchedulerException;
  
    /**
     * Get details for a job from scheduler.
     * @param jobKey
     * @return
     */
    JobDetail getJobDetail(JobKey jobKey) throws SchedulerException;
  
    /**
     * Get all triggers created for a job.
     * @param jobKey
     * @return
     * @throws SchedulerException
     */
    List<? extends Trigger> getTriggersForJob(JobKey jobKey)
      throws SchedulerException;
  
    /**
     * Check whether the scheduler is already running.
     * @return
     */
    boolean isSchedulerStarted() throws SchedulerException;
  }
  