Mechanism for monitor java application or JVM

Question

Ladies & Gentleman,
I develop Java application under Windows 2000 datacenter. For gurantee to capture all of abnormal situation of java application and also JVM, I need to know how to capture the situation. Do any other tools to do these things? I am very appreciated if you could tell me.

Answer 1

You don't exactly need any specific tools to just capture exceptions, that can easily be done by wrapping the program you want to monitor with your own main() method and adding some shutdown hooks...
But it would be nice to know what you want to do once it happens....
Regardless of which, here's an example of that wrap...
import java.lang.reflect.*;
public class Watch extends Thread
     public void run()
          System.out.println("VM is closing down");
     public static void main(String[] args) throws Exception
          if (args.length == 0)
               System.out.println("You must supply the name of the class to start with.");
               System.exit(1);
          Runtime.getRuntime().addShutdownHook(new Watch());
          try
               Class theClass = Class.forName(args[0]);
               Method theMethod = theClass.getDeclaredMethod("main", new Class[]{String[].class});
               String[] theNewArray = new String[args.length - 1];
               System.arraycopy(args, 1, theNewArray, 0, theNewArray.length);
               System.out.println("Starting program with class "+args[0]+"...");
               theMethod.invoke(null, new Object[]{theNewArray});
               System.out.println("Program is done running.");
          catch (ClassNotFoundException cnfe)
               System.out.println("No such class: '"+args[0]+"'");               
          catch (NoSuchMethodException nsme)
               System.out.println("The class "+args[0]+" has no main method.");
          catch (SecurityException se)
               System.out.println("Can't start: "+se.getMessage());
          catch (IllegalAccessException iae)
               System.out.println("Can't invoke main method in class "+args[0]+": "+iae.getMessage());
          catch (Exception ite)
               System.out.println("Exception occurred when running class "+args[0]+": "+ite.getMessage());
}You can easily just swap those System.out's for something else.
However, if you mean watching the process from outside the VM, then you need something else, I suppose.
/F