/*
* 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.IOException;
import org.apache.pig.LoadFunc;
import org.apache.pig.builtin.PigStorage;
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 synchronous manner by reading its output
* via its <code>stdout</code>.
*/
public class DefaultOutputHandler extends OutputHandler {
BufferedPositionedInputStream stdout;
public DefaultOutputHandler() {
deserializer = new PigStorage();
}
public DefaultOutputHandler(HandleSpec spec) {
deserializer = (LoadFunc)PigContext.instantiateFuncFromSpec(spec.spec);
}
public OutputType getOutputType() {
return OutputType.SYNCHRONOUS;
}
public void bindTo(String fileName, BufferedPositionedInputStream is,
long offset, long end) throws IOException {
stdout = is;
super.bindTo(fileName, stdout, offset, end);
}
public synchronized void close() throws IOException {
if(!alreadyClosed) {
super.close();
stdout.close();
stdout = null;
alreadyClosed = true;
}
}
}