Re: Shutting down Jigsaw server without JigAdmin

On Fri, 3 Jan 2003, Wayne Johnson wrote:

>
> We are using a somewhat stripped down version of Jigsaw that does not
> run the jigadmin (8009) port for security and other reasons.  This
> server runs in a JNI environment.  We need to shutdown the Jigsaw Serve=
r
> before shutting down the JVM, but without a JigAdmin, we can't use
> JigKill.

> I propose to write a very stripped down Jigsaw server that:
> 1) in the initialization method, saves the reference to the shm in a cl=
ass global,
> 2) modify server.props to start our service,
> 3) has a public static method that takes this shm reference and calls i=
ts shutdown method,
> 4) Modify our JNI code to call this public static method at shutdown.

jdk1.3 an onward has the possibility to catch some signals, using the
shutdown hook [1]. If your JNI code is able to send such signal to the jv=
m
process, then Jigsaw will save its configuration and exit.
Is it enough for your need?
Regards,

[1] http://java.sun.com/j2se/1.3/docs/api/java/lang/Runtime.html#addShutd=
ownHook(java.lang.Thread)

--=20
Yves Lafon - W3C
"Baroula que barouleras, au ti=E9u toujou t'entourneras."