| /** |
| * 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.streaming.io; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.streaming.PipeMapRed; |
| import org.apache.hadoop.typedbytes.TypedBytesOutput; |
| import org.apache.hadoop.typedbytes.TypedBytesWritableOutput; |
| |
| /** |
| * InputWriter that writes the client's input as typed bytes. |
| */ |
| public class TypedBytesInputWriter extends InputWriter<Object, Object> { |
| |
| private TypedBytesOutput tbOut; |
| private TypedBytesWritableOutput tbwOut; |
| |
| @Override |
| public void initialize(PipeMapRed pipeMapRed) throws IOException { |
| super.initialize(pipeMapRed); |
| DataOutput clientOut = pipeMapRed.getClientOutput(); |
| tbOut = new TypedBytesOutput(clientOut); |
| tbwOut = new TypedBytesWritableOutput(clientOut); |
| } |
| |
| @Override |
| public void writeKey(Object key) throws IOException { |
| writeTypedBytes(key); |
| } |
| |
| @Override |
| public void writeValue(Object value) throws IOException { |
| writeTypedBytes(value); |
| } |
| |
| private void writeTypedBytes(Object value) throws IOException { |
| if (value instanceof Writable) { |
| tbwOut.write((Writable) value); |
| } else { |
| tbOut.write(value); |
| } |
| } |
| |
| } |