Package nux.xom.sandbox

Source Code of nux.xom.sandbox.DocumentMapFileMonitorTest

/*
* Copyright (c) 2005, The Regents of the University of California, through
* Lawrence Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
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* this list of conditions and the following disclaimer in the documentation
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* National Laboratory, U.S. Dept. of Energy nor the names of its contributors
* may be used to endorse or promote products derived from this software without
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package nux.xom.sandbox;

import java.io.File;
import java.io.FileWriter;

import nu.xom.Builder;
import nu.xom.Document;
import nux.xom.pool.DocumentMap;
import nux.xom.pool.PoolConfig;

/**
* Stress test for file change monitoring of DocumentMap. Determines how much
* overhead File.lastModified() has when monitoring thousands or tens of
* thousands of files.
*
* @author whoschek@lbl.gov
* @author $Author: hoschek3 $
* @version $Revision: 1.2 $, $Date: 2005/11/30 00:22:09 $
*/
final class DocumentMapFileMonitorTest {

  public static void main(String[] args) throws Exception {
    System.setProperty("nux.xom.pool.Pool.debug", "true"); // watch evictions
//    System.setProperty("nux.xom.pool.PoolConfig.invalidationPeriod", "5000");
   
    final PoolConfig config = new PoolConfig();
    int k = -1;
   
    int numFiles = 1000;
    if (args.length > ++k) numFiles = Math.max(1, Integer.parseInt(args[k]));

    int threads = 1;
    if (args.length > ++k) threads = Math.max(1, Integer.parseInt(args[k]));
   
    if (args.length > ++k) config.setCompressionLevel(Integer.parseInt(args[k]));
   
    if (args.length > ++k) config.setMaxEntries(Integer.parseInt(args[k]));
   
    if (args.length > ++k) config.setFileMonitoring(new Boolean(args[k]).booleanValue());
   
    if (args.length > ++k) config.setCapacity(Long.parseLong(args[k]));
   
    if (args.length > ++k) config.setMaxIdleTime(Long.parseLong(args[k]));
   
    if (args.length > ++k) config.setMaxLifeTime(Long.parseLong(args[k]));
   
    final DocumentMap pool = new DocumentMap(config);
   
    final File[] files = new File[numFiles];
    new File("tmp").mkdir();
    for (int j=0; j < numFiles; j++) {
      files[j] = new File("tmp/file" + j + ".xml");
      System.out.println("writing " + files[j]);
      FileWriter out = new FileWriter(files[j]);
      out.write("<hello/>");
      out.flush();
      out.close();
    }
   
    for (int j=0; j < threads; j++) {
      final int t = j;
      Runnable runner = new Runnable() {
        public void run() {
          try {
            Builder builder = new Builder();
            int i = 0;
            while (i < files.length) {
              System.out.println("t="+ t + ", index="+i);
              Document doc = builder.build(files[i]);
              Object key = files[i];
              pool.putDocument(key, doc);
              i++;
            }
            System.out.println("done");
          }
          catch (Throwable t) {
            t.printStackTrace();
            System.exit(-1);
          }
        }
      };
      new Thread(runner).start();
    }
 
    Thread.sleep(Long.MAX_VALUE); // wait forever
  }

}
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