| /* |
| * 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.pig.impl.streaming; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.StreamToPig; |
| import org.apache.pig.impl.PigContext; |
| import org.apache.pig.impl.io.BufferedPositionedInputStream; |
| import org.apache.pig.impl.streaming.StreamingCommand.HandleSpec; |
| |
| /** |
| * FileOutputHandler handles the output from the Pig-Streaming |
| * executable in an asynchronous manner by reading it from |
| * an external file specified by the user. |
| */ |
| public class FileOutputHandler extends OutputHandler { |
| |
| private String fileName; |
| |
| public FileOutputHandler(HandleSpec handleSpec) throws ExecException { |
| fileName = handleSpec.name; |
| deserializer = |
| (StreamToPig) PigContext.instantiateFuncFromSpec(handleSpec.spec); |
| } |
| |
| @Override |
| public OutputType getOutputType() { |
| return OutputType.ASYNCHRONOUS; |
| } |
| |
| @Override |
| public void bindTo(String fileName, BufferedPositionedInputStream is, |
| long offset, long end) throws IOException { |
| // This is a trigger to start processing the output from the file ... |
| // ... however, we must ignore the input parameters and use ones |
| // provided during initialization |
| File file = new File(this.fileName); |
| BufferedPositionedInputStream fileInStream = |
| new BufferedPositionedInputStream(new FileInputStream(file)); |
| super.bindTo(this.fileName, fileInStream, 0, file.length()); |
| } |
| |
| } |