Problem in stopping tomcat

Question

Hi
I have a client program which creates a socket on some port and a server program that has a server socket on the same port. I have a servlet program that starts when tomcat starts as i used load on startup option in tomcat. This servlet program creates an object for the server program and the server program has a while loop like this
while(true)
//code
}so the server program starts running as servlet starts and is always running and waits for clients requests. Things work fine when my client requests and server replies for it. My problem is even if i shutdown tomcat, when my client requests the server is responding. I want the server to be down when i suddenly shutdown tomcat. How can i accomplish this

Answer 1

A couple of suggestions:
1) Put the server code in its own thread that you create. Set the thread to be a daemon thread. When Tomcat shuts down all non-daemon threads should end, so the daemon threads get killed and the JVM closes
2) Add a checkback in the loop that checks if your Tomcat port is being served. If it is, continue running, if not, end. Something like:
boolean serverRunning = true;
while(serverRunning) {
  // do work
  serverRunning = checkTomcatIsRunning();
}3) Catalina has a shutdown hook as part of its API. You may try accessing that. I have never done so, but perhaps there are references on the web. That could result in a forced thread stop, or a variable check like 2).