001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.process;
016    
017    import java.io.IOException;
018    import java.io.InputStream;
019    
020    /**
021     * @author Shuyang Zhou
022     */
023    public class ConsumerOutputProcessor implements OutputProcessor<Void, Void> {
024    
025            @Override
026            public Void processStdErr(InputStream stdErrInputStream)
027                    throws ProcessException {
028    
029                    _consume(stdErrInputStream);
030    
031                    return null;
032            }
033    
034            @Override
035            public Void processStdOut(InputStream stdOutInputStream)
036                    throws ProcessException {
037    
038                    _consume(stdOutInputStream);
039    
040                    return null;
041            }
042    
043            private void _consume(InputStream inputStream) throws ProcessException {
044                    byte[] buffer = new byte[1024];
045    
046                    try {
047                            while (inputStream.read(buffer) != -1);
048                    }
049                    catch (IOException ioe) {
050                            throw new ProcessException(ioe);
051                    }
052                    finally {
053                            try {
054                                    inputStream.close();
055                            }
056                            catch (IOException ioe) {
057                                    throw new ProcessException(ioe);
058                            }
059                    }
060            }
061    
062    }