nl.surfsara.newsreader.pipeline.util.PipeThread.java Source code

Introduction

Here is the source code for nl.surfsara.newsreader.pipeline.util.PipeThread.java

Source

/**
 * Copyright 2014 SURFsara
 *
 * Licensed 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 nl.surfsara.newsreader.pipeline.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.io.IOUtils;
import org.apache.log4j.Logger;

/**
 * Runnable class that copies (pipes) an Inputstream to an Outputstream. Used
 * for streaming subprocess Input- and Outputstreams in a separate thread
 * (preventing deadlocks).
 * 
 * @author mathijs.kattenberg@surfsara.nl
 */
public class PipeThread implements Runnable {
    private static final Logger logger = Logger.getLogger(PipeThread.class);
    private OutputStream os;
    private InputStream is;
    private boolean closeAfterCopy;
    private String id;

    public PipeThread(String id, InputStream is, OutputStream os, boolean closeAfterCopy) {
        this.id = id;
        this.is = new BufferedInputStream(is);
        this.os = new BufferedOutputStream(os);
        this.closeAfterCopy = closeAfterCopy;
    }

    public void run() {
        try {
            IOUtils.copy(is, os);
            os.flush();
            if (closeAfterCopy) {
                os.close();
                is.close();
            }
        } catch (IOException e) {
            logger.error(id + ": " + e);
        }
    }

}