org.apache.hadoop.mapred.JobStatusChangeEvent Maven / Gradle / Ivy
/**
* 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.hadoop.mapred;
/**
* {@link JobStatusChangeEvent} tracks the change in job's status. Job's
* status can change w.r.t
* - run state i.e PREP, RUNNING, FAILED, KILLED, SUCCEEDED
* - start time
* - priority
* Note that job times can change as the job can get restarted.
*/
class JobStatusChangeEvent extends JobChangeEvent {
// Events in job status that can lead to a job-status change
static enum EventType {RUN_STATE_CHANGED, START_TIME_CHANGED, PRIORITY_CHANGED}
private JobStatus oldStatus;
private JobStatus newStatus;
private EventType eventType;
JobStatusChangeEvent(JobInProgress jip, EventType eventType,
JobStatus oldStatus, JobStatus newStatus) {
super(jip);
this.oldStatus = oldStatus;
this.newStatus = newStatus;
this.eventType = eventType;
}
/**
* Create a {@link JobStatusChangeEvent} indicating the state has changed.
* Note that here we assume that the state change doesnt care about the old
* state.
*/
JobStatusChangeEvent(JobInProgress jip, EventType eventType, JobStatus status)
{
this(jip, eventType, status, status);
}
/**
* Returns a event-type that caused the state change
*/
EventType getEventType() {
return eventType;
}
/**
* Get the old job status
*/
JobStatus getOldStatus() {
return oldStatus;
}
/**
* Get the new job status as a result of the events
*/
JobStatus getNewStatus() {
return newStatus;
}
}