[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.mapred; |
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| 20 | |
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| 21 | import java.io.DataInput; |
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| 22 | import java.io.DataOutput; |
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| 23 | import java.io.IOException; |
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| 24 | import org.apache.hadoop.io.Writable; |
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| 25 | |
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| 26 | class JvmTask implements Writable { |
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| 27 | Task t; |
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| 28 | boolean shouldDie; |
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| 29 | public JvmTask(Task t, boolean shouldDie) { |
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| 30 | this.t = t; |
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| 31 | this.shouldDie = shouldDie; |
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| 32 | } |
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| 33 | public JvmTask() {} |
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| 34 | public Task getTask() { |
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| 35 | return t; |
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| 36 | } |
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| 37 | public boolean shouldDie() { |
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| 38 | return shouldDie; |
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| 39 | } |
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| 40 | public void write(DataOutput out) throws IOException { |
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| 41 | out.writeBoolean(shouldDie); |
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| 42 | if (t != null) { |
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| 43 | out.writeBoolean(true); |
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| 44 | out.writeBoolean(t.isMapTask()); |
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| 45 | t.write(out); |
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| 46 | } else { |
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| 47 | out.writeBoolean(false); |
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| 48 | } |
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| 49 | } |
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| 50 | public void readFields(DataInput in) throws IOException { |
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| 51 | shouldDie = in.readBoolean(); |
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| 52 | boolean taskComing = in.readBoolean(); |
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| 53 | if (taskComing) { |
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| 54 | boolean isMap = in.readBoolean(); |
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| 55 | if (isMap) { |
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| 56 | t = new MapTask(); |
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| 57 | } else { |
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| 58 | t = new ReduceTask(); |
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| 59 | } |
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| 60 | t.readFields(in); |
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| 61 | } |
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| 62 | } |
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| 63 | } |
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