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PerfTrack and Async utilities.
There is a newer version: 1.1.2
package net.jmatrix.utils;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

/**
 *
 */
public final class StreamUtil
{
   static final int EOS=-1;

   /** 
    * Pumps one stream to another, with a buffer - both streams are
    * closed when the pump is complete.
    */
   public static final int pump(InputStream is, OutputStream os)
      throws IOException {
      int totalBytes;
      try
      {
         byte buffer[]=new byte[8192];
         int bytes=is.read(buffer);
         totalBytes = 0;
         while (bytes > 0) {
            totalBytes+=bytes;
            os.write(buffer, 0, bytes);
            // System.out.println ("last read: "+bytes+" reading...");
            // SOLVED! -- See jet_net ChunkedInputStream, and 
            // Transfer-Encoding: chunked.  !!
            // pab, 24/7/2003
            bytes=is.read(buffer);
         }
      } 
      finally
      {
         if (os != null) 
         {
            os.flush(); 
            os.close();
         }
         if (is != null)
         {
            is.close();
         }
      }
      return totalBytes;
   }
   
   /** 
    * Pumps one stream to another, with a buffer - both streams are
    * closed when the pump is complete.
    */
   public static final int pump(Reader is, Writer os)
         throws IOException {
      char buffer[]=new char[8192];
      int bytes=is.read(buffer);
      int totalBytes=0;
      try
      {
         while (bytes > 0) {
            totalBytes+=bytes;
            os.write(buffer, 0, bytes);
            // System.out.println ("last read: "+bytes+" reading...");
            // SOLVED! -- See jet_net ChunkedInputStream, and 
            // Transfer-Encoding: chunked.  !!
            // pab, 24/7/2003
            bytes=is.read(buffer);
         }
      } 
      finally
      {
         if (os != null) 
         {
            os.flush(); 
            os.close();
         }
         if (is != null)
         {
            is.close();
         }
      }
      return totalBytes;
   }
   
   public static final void unbufferedPump(InputStream is, OutputStream os) 
      throws IOException {
      try
      {
         int b=is.read();
         while (b != EOS) {
            os.write(b);
            b=is.read();
         }
      } 
      finally
      {
         if (os != null) 
         {
            os.flush(); 
            os.close();
         }
         if (is != null)
         {
            is.close();
         }
      }
   }

  /** */
  public static final void pumpExactly(InputStream is, OutputStream os, 
                                       int bytes) 
    throws IOException {
     try
     {
        for (int i=0; i