MapTaskCompletionEventsUpdate.java
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:2k
源码类别:
网格计算
开发平台:
Java
- /**
- * 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;
- import java.io.DataInput;
- import java.io.DataOutput;
- import java.io.IOException;
- import org.apache.hadoop.io.Writable;
- /**
- * A class that represents the communication between the tasktracker and child
- * tasks w.r.t the map task completion events. It also indicates whether the
- * child task should reset its events index.
- */
- class MapTaskCompletionEventsUpdate implements Writable {
- TaskCompletionEvent[] events;
- boolean reset;
- public MapTaskCompletionEventsUpdate() { }
- public MapTaskCompletionEventsUpdate(TaskCompletionEvent[] events,
- boolean reset) {
- this.events = events;
- this.reset = reset;
- }
- public boolean shouldReset() {
- return reset;
- }
- public TaskCompletionEvent[] getMapTaskCompletionEvents() {
- return events;
- }
- public void write(DataOutput out) throws IOException {
- out.writeBoolean(reset);
- out.writeInt(events.length);
- for (TaskCompletionEvent event : events) {
- event.write(out);
- }
- }
- public void readFields(DataInput in) throws IOException {
- reset = in.readBoolean();
- events = new TaskCompletionEvent[in.readInt()];
- for (int i = 0; i < events.length; ++i) {
- events[i] = new TaskCompletionEvent();
- events[i].readFields(in);
- }
- }
- }