| /** |
| * 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.ByteArrayOutputStream; |
| import java.io.DataOutput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.streaming.PipeMapRed; |
| |
| /** |
| * InputWriter that writes the client's input as raw bytes. |
| */ |
| public class RawBytesInputWriter extends InputWriter<Writable, Writable> { |
| |
| private DataOutput clientOut; |
| private ByteArrayOutputStream bufferOut; |
| private DataOutputStream bufferDataOut; |
| |
| @Override |
| public void initialize(PipeMapRed pipeMapRed) throws IOException { |
| super.initialize(pipeMapRed); |
| clientOut = pipeMapRed.getClientOutput(); |
| bufferOut = new ByteArrayOutputStream(); |
| bufferDataOut = new DataOutputStream(bufferOut); |
| } |
| |
| @Override |
| public void writeKey(Writable key) throws IOException { |
| writeRawBytes(key); |
| } |
| |
| @Override |
| public void writeValue(Writable value) throws IOException { |
| writeRawBytes(value); |
| } |
| |
| private void writeRawBytes(Writable writable) throws IOException { |
| if (writable instanceof BytesWritable) { |
| BytesWritable bw = (BytesWritable) writable; |
| byte[] bytes = bw.getBytes(); |
| int length = bw.getLength(); |
| clientOut.writeInt(length); |
| clientOut.write(bytes, 0, length); |
| } else { |
| bufferOut.reset(); |
| writable.write(bufferDataOut); |
| byte[] bytes = bufferOut.toByteArray(); |
| clientOut.writeInt(bytes.length); |
| clientOut.write(bytes); |
| } |
| } |
| |
| } |