| /** |
| * 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; |
| } |
| } |