HeartbeatResponse.java
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上传日期:2018-01-08
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- /**
- * 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 java.util.HashSet;
- import java.util.Map;
- import java.util.HashMap;
- import java.util.Set;
- import org.apache.hadoop.conf.Configurable;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.io.Writable;
- import org.apache.hadoop.io.WritableUtils;
- /**
- * The response sent by the {@link JobTracker} to the hearbeat sent
- * periodically by the {@link TaskTracker}
- *
- */
- class HeartbeatResponse implements Writable, Configurable {
- Configuration conf = null;
- short responseId;
- int heartbeatInterval;
- TaskTrackerAction[] actions;
- Set<JobID> recoveredJobs = new HashSet<JobID>();
- HeartbeatResponse() {}
-
- HeartbeatResponse(short responseId, TaskTrackerAction[] actions) {
- this.responseId = responseId;
- this.actions = actions;
- this.heartbeatInterval = MRConstants.HEARTBEAT_INTERVAL_MIN;
- }
-
- public void setResponseId(short responseId) {
- this.responseId = responseId;
- }
-
- public short getResponseId() {
- return responseId;
- }
-
- public void setRecoveredJobs(Set<JobID> ids) {
- recoveredJobs = ids;
- }
-
- public Set<JobID> getRecoveredJobs() {
- return recoveredJobs;
- }
-
- public void setActions(TaskTrackerAction[] actions) {
- this.actions = actions;
- }
-
- public TaskTrackerAction[] getActions() {
- return actions;
- }
-
- public void setConf(Configuration conf) {
- this.conf = conf;
- }
- public Configuration getConf() {
- return conf;
- }
- public void setHeartbeatInterval(int interval) {
- this.heartbeatInterval = interval;
- }
-
- public int getHeartbeatInterval() {
- return heartbeatInterval;
- }
-
- public void write(DataOutput out) throws IOException {
- out.writeShort(responseId);
- out.writeInt(heartbeatInterval);
- if (actions == null) {
- WritableUtils.writeVInt(out, 0);
- } else {
- WritableUtils.writeVInt(out, actions.length);
- for (TaskTrackerAction action : actions) {
- WritableUtils.writeEnum(out, action.getActionId());
- action.write(out);
- }
- }
- // Write the job ids of the jobs that were recovered
- out.writeInt(recoveredJobs.size());
- for (JobID id : recoveredJobs) {
- id.write(out);
- }
- }
-
- public void readFields(DataInput in) throws IOException {
- this.responseId = in.readShort();
- this.heartbeatInterval = in.readInt();
- int length = WritableUtils.readVInt(in);
- if (length > 0) {
- actions = new TaskTrackerAction[length];
- for (int i=0; i < length; ++i) {
- TaskTrackerAction.ActionType actionType =
- WritableUtils.readEnum(in, TaskTrackerAction.ActionType.class);
- actions[i] = TaskTrackerAction.createAction(actionType);
- actions[i].readFields(in);
- }
- } else {
- actions = null;
- }
- // Read the job ids of the jobs that were recovered
- int size = in.readInt();
- for (int i = 0; i < size; ++i) {
- JobID id = new JobID();
- id.readFields(in);
- recoveredJobs.add(id);
- }
- }
- }