calculate heap info

[jason chan]

Hello..I have this code to calculate the heap info..
but i need to make this code work when JVM starts..
which means that this code has to start itself when JVM starts and then calculate the heap info at that time
can anyone help me out with this
thanks

import org.omg.SendingContext.RunTime;

	public class Run {

	 /**
	  * @param args
	  */
	 public static void main(String[] args) {
	  // TODO Auto-generated method stub
	  Runtime runTime = Runtime.getRuntime();
	  
	  System.out.print(" total Memory :"+ runTime.totalMemory());
	  System.out.print( ": \tFree memory: " + runTime.freeMemory());
	  System.out.println( "\t  max memory :  " + runTime.maxMemory());
	  
	  
	 }

	}


 

[Campbell Ritchie]

That makes for confusing code, using Runtime and RunTime classes.

How about putting that code in a static initialiser block in your class with the main method in? It will then be executed when that class is loaded.

[jason chan]

thanks for the reply..
i am sorry was a not clear with my problem..
Well what i am looking for is that when JVM starts, a java component should attach itself to the JVM and calculate the heap info automatically..

[W Fay]

Sounds like you want some kind of JVM agent...

[jason chan]

Hi.. Can anyone tell me if i can run this code for multiple JVM's
currently it is for one JVM..but what if there are multiple JVM's in a single box..
I am looking for a multi JVM support...
thanks