curcuru 01/12/10 13:18:05 Added: test/java/src/org/apache/qetest ThreadedStreamReader.java Log: Simplistic threaded stream reader for reading shelled processes' System.err/.out streams Revision Changes Path 1.1 xml-xalan/test/java/src/org/apache/qetest/ThreadedStreamReader.java Index: ThreadedStreamReader.java =================================================================== /* * The Apache Software License, Version 1.1 * * * Copyright (c) 2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Xalan" and "Apache Software Foundation" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", * nor may "Apache" appear in their name, without prior written * permission of the Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation and was * originally based on software copyright (c) 2000, Lotus * Development Corporation., http://www.lotus.com. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */ package org.apache.qetest; import java.io.BufferedReader; import java.io.IOException; /** * Utility class for reading buffered streams on a thread. * * <p>Common usage case: * <pre> * ThreadedStreamReader errReader = new ThreadedStreamReader(); * Process p = Runtime.exec(cmdLine, environment); * errReader.setInputStream( * new BufferedReader( * new InputStreamReader(proc.getErrorStream()), bufSize)); * errReader.start(); * proc.waitFor(); * errReader.join(); * String sysErr = errReader.getBuffer().toString(); * </pre> * * @author [EMAIL PROTECTED] * @version $Id: ThreadedStreamReader.java,v 1.1 2001/12/10 21:18:05 curcuru Exp $ */ public class ThreadedStreamReader extends Thread { /** Reader we pull data from. */ BufferedReader is = null; /** Buffer we store the data in. */ StringBuffer sb = null; /** * Asks us to capture data from the provided stream. * @param set BufferedReader we should pull data from */ public void setInputStream(BufferedReader set) { is = set; } /** * Implement Thread.run(). * This asks us to start reading data from our setInputStream() * and storing it in our getBuffer() area. Note you probably * should have called setInputStream() first. */ public void run() { sb = new StringBuffer(); sb.append(READER_START_MARKER); if (null == is) { sb.append("ERROR! setInputStream(null)"); sb.append(READER_END_MARKER); return; } String i = null; try { i = is.readLine(); } catch (IOException ioe1) { sb.append("ERROR! no data to read, threw: " + ioe1.toString()); i = null; } while (i != null) { sb.append(i); // Note: also append the implicit newline that readLine grabbed sb.append('\n'); try { i = is.readLine(); } catch (IOException ioe2) { sb.append("WARNING! readLine() threw: " + ioe2.toString()); i = null; } } sb.append(READER_END_MARKER); } /** * Get the buffer of data we've captured. * * @return our internal StringBuffer; will be null if we * have not been run yet. */ public StringBuffer getBuffer() { return sb; } public static final String READER_START_MARKER = "<stream>\n"; public static final String READER_END_MARKER = "</stream>\n"; } // end of class ThreadedStreamReader
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