content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.job;
  
  import static java.util.Objects.requireNonNull;
  
  import alluxio.scheduler.job.Job;
  import alluxio.scheduler.job.JobState;
  import alluxio.scheduler.job.Task;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Optional;
  import java.util.OptionalLong;
  
  /**
   * Abstract class for job. It provides basic job information and state management.
   *
   * @param <T> the type of the task of the job
   */
  public abstract class AbstractJob<T extends Task<?>> implements Job<T> {
    private static final Logger LOG = LoggerFactory.getLogger(LoadJob.class);
    protected final String mJobId;
    protected JobState mState;
    protected OptionalLong mEndTime = OptionalLong.empty();
    protected final long mStartTime;
    protected final Optional<String> mUser;
  
    /**
     * Creates a new instance of {@link AbstractJob}.
     *
     * @param user the user who submitted the job
     * @param jobId the job id
     */
    public AbstractJob(Optional<String> user, String jobId) {
      mUser = requireNonNull(user, "user is null");
      mJobId = requireNonNull(jobId, "jobId is null");
      mState = JobState.RUNNING;
      mStartTime = System.currentTimeMillis();
    }
  
    @Override
    public String getJobId() {
      return mJobId;
    }
  
    /**
     * Get end time.
     *
     * @return end time
     */
    @Override
    public OptionalLong getEndTime() {
      return mEndTime;
    }
  
    /**
     * Update end time.
     *
     * @param time time in ms
     */
    public void setEndTime(long time) {
      mEndTime = OptionalLong.of(time);
    }
  
    /**
     * Get load status.
     *
     * @return the load job's status
     */
    @Override
    public JobState getJobState() {
      return mState;
    }
  
    /**
     * Set load state.
     *
     * @param state new state
     */
    @Override
    public void setJobState(JobState state) {
      LOG.debug("Change JobState to {} for job {}", state, this);
      mState = state;
      if (!isRunning()) {
        mEndTime = OptionalLong.of(System.currentTimeMillis());
      }
    }
  
    @Override
    public boolean isRunning() {
      return mState == JobState.RUNNING || mState == JobState.VERIFYING;
    }
  
    @Override
    public boolean isDone() {
      return mState == JobState.SUCCEEDED || mState == JobState.FAILED;
    }
  }
  