how to calculate the Size of data stored in session

[shaonan zhang]

hi

I want to observe the amount of the session use. because An excellent performance in less session data is obtained.

I can do it by C#

 
using System;
using System.IO;
using System.Web;
using System.Runtime.Serialization.Formatters.Binary;

namespace Utilities.Web
{
  public class WebUtil
  {
    public static long CalculateSessionSize()
    {
      MemoryStream stream = new MemoryStream();
      BinaryWriter writer = new BinaryWriter(stream);
      HttpContext hc = HttpContext.Current;
      foreach (string key in hc.Session.Keys)
      {
        writer.Write(key);
        (new BinaryFormatter()).Serialize(writer.BaseStream, hc.Session[key]);
      }
      writer.Flush();
      long size = stream.Length;
      stream.Close();

      return size;
    }
  }
}
 

But I dont know how do it by Java, (The Same Java class doesn't exist. ?)

please help me if any body know this.
i need it urgently.

thanks ina dvance,

ZSN

[Paul Clapham]

You can serialize things in Java, too. Your google keywords are "java serialization tutorial". Send your output to a ByteArrayOutputStream.

I'm not convinced that it's a useful technique for finding the memory usage of objects, but the Java concept is pretty much identical to the C# code you posted there.

[David Newton]

Many app servers have a mechanism for determining such statistics as well, although getting aggregate data across replicated servers could be tricky (I've never tried).