[Wrapper-user] Sockets and desktop

[ender w. <end...@ya...>]

Hello.

First some details:
I am working on a project involving an instant one way
messaging on windows. Basically I am writing a
service(SocketService) that connects with a server
through a socket and writes to file/(some repository)
the messages it receives. Another service( 
DesktopMessageService) reads from the files the
messages and if it finds a new message for the CURRENT
user it will open a frame and show it on the screen. 
The reason I use two services instead of one is
because I read that a service either does neworking or
it accesses the desktop or console. 
 The SocketService performs well, it does indeed read
from a socket(ServerSocket) and when contacted there
are messages it does store them on file. 

The problems arise with the DesktopMessageService.I
have yet to find a way to detect the current
user.Basically when the pc is booted the
DesktopMesssage starts ,tries to detect the current
user and print to screen a message.The problem is that

I cannot decect when a user loggs on to the machine.
The current user for the DesktopService is still 
System.So if I want to print a message Hi +
System.getProperty("user.name") , even if there is a
user logged on it still prints Hi System , not Hi
"Current User Name".Im also tried to restart the JVm
periodically but the curent user is still System.
By the way the service works fine when tested in a
console .

So my questions are, Is there a way to detect when a
user loggs on and get his name?
Also, is there a way to detect when a users logs off?

Thanks, Alex






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