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Posted to commits@xalan.apache.org by cu...@apache.org on 2001/12/10 22:18:05 UTC
cvs commit: xml-xalan/test/java/src/org/apache/qetest ThreadedStreamReader.java
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 apache@apache.org.
*
* 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 Shane_Curcuru@lotus.com
* @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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