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//******************************************************************************
//
// File: UC.java
// Package: edu.rit.pj.test
// Unit: Class edu.rit.pj.test.UC
//
// This Java source file is copyright (C) 2007 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This Java source file is part of the Parallel Java Library ("PJ"). PJ is free
// software; you can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// PJ is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// Linking this library statically or dynamically with other modules is making a
// combined work based on this library. Thus, the terms and conditions of the
// GNU General Public License cover the whole combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent modules, and
// to copy and distribute the resulting executable under terms of your choice,
// provided that you also meet, for each linked independent module, the terms
// and conditions of the license of that module. An independent module is a
// module which is not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the library, but
// you are not obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************
package edu.rit.pj.test;
import edu.rit.pj.ParallelIteration;
import edu.rit.pj.ParallelRegion;
import edu.rit.pj.ParallelTeam;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.atomic.AtomicLong;
/**
* Class UC is a main program that counts lines, words, and bytes in the URLs
* given on the command line. It is a multi-threaded program using Parallel
* Java.
* <P>
* Usage: java edu.rit.pj.test.UC <I>url</I> . . .
*
* @author Alan Kaminsky
* @version 04-Jun-2007
*/
public class UC
{
// Prevent construction.
private UC()
{
}
// Global variables.
static String[] urls;
static AtomicLong totalLines = new AtomicLong (0L);
static AtomicLong totalWords = new AtomicLong (0L);
static AtomicLong totalBytes = new AtomicLong (0L);
// Main program.
/**
* Main program.
*/
public static void main
(String[] args)
throws Throwable
{
long stopwatch = -System.currentTimeMillis();
urls = args;
new ParallelTeam (urls.length) .execute (new ParallelRegion()
{
public void run() throws Exception
{
// Process all URLs.
execute (urls, new ParallelIteration<String>()
{
// Process one URL.
public void run (String url)
{
try
{
// Open a data stream from the URL.
InputStream stream = new URL (url) .openStream();
// Initialize counters.
long lines = 0L;
long words = 0L;
long bytes = 0L;
boolean inaword = false;
// Read data and update counters.
int b;
while ((b = stream.read()) != -1)
{
++ bytes;
if (b == '\n') ++ lines;
if (0x21 <= b && b <= 0x7e) // Non-whitespace
{
if (! inaword) ++ words;
inaword = true;
}
else // Whitespace
{
inaword = false;
}
}
// Close data stream.
stream.close();
// Accumulate totals.
totalLines.addAndGet (lines);
totalWords.addAndGet (words);
totalBytes.addAndGet (bytes);
// Print results.
System.out.println
(lines + "\t" +
words + "\t" +
bytes + "\t" +
url);
}
catch (MalformedURLException exc)
{
System.err.println
("\"" + url + "\": Malformed URL");
}
catch (IOException exc)
{
System.err.println
(url + ": I/O error");
}
}
});
}
});
// Print final totals.
System.out.println
(totalLines + "\t" +
totalWords + "\t" +
totalBytes + "\tTotal");
stopwatch += System.currentTimeMillis();
System.out.println (stopwatch + " msec");
}
}
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