| /** |
| * 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.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableUtils; |
| import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig; |
| |
| /** |
| * 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; |
| |
| HeartbeatResponse() {} |
| |
| HeartbeatResponse(short responseId, TaskTrackerAction[] actions) { |
| this.responseId = responseId; |
| this.actions = actions; |
| this.heartbeatInterval = JTConfig.JT_HEARTBEAT_INTERVAL_MIN_DEFAULT; |
| } |
| |
| public void setResponseId(short responseId) { |
| this.responseId = responseId; |
| } |
| |
| public short getResponseId() { |
| return responseId; |
| } |
| |
| 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); |
| } |
| } |
| } |
| |
| 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; |
| } |
| } |
| } |