ifs.fnd.service

Class ShutdownListener

java.lang.Object

ifs.fnd.service.ShutdownListener

public class ShutdownListener
extends java.lang.Object

A class implementing protocol for graceful shutdown of VM in case of running Java as a Windows service through the ifssrv.exe executable.

This class implements a socket listener bound to the localhost only and listening for a token. Both the token and the port number are given as environment variables and are set during service startup by the ifssrv.exe executable.

On service shutdown ifssrv.exe will send the token to the listener; listener simply makes call to System.exit(), which makes it possible to execute any shutdown hook.

The algorithm is a result of Sun Java VM implementation that doesn't listen on any OS signal if started with -Xrs command line modifier.

Method Summary

Methods

Modifier and Type	Method and Description
static void	start() Starts the listener if not already started.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

start

public static void start()

Starts the listener if not already started. Port number and value of the token the listener is supposed to listen on are taken from environment variables.