Re: Compare java instances

From:

"Oliver Wong" <owong@castortech.com>

Newsgroups:

comp.lang.java.programmer

Date:

Tue, 10 Apr 2007 12:12:03 -0400

Message-ID:

<nHOSh.19377$mo3.239534@weber.videotron.net>

"Robina Brintha" <robina.brintha@gmail.com> wrote in message
news:1176219022.600726.102360@n76g2000hsh.googlegroups.com...

On Apr 10, 5:27 pm, "Oliver Wong" <o...@castortech.com> wrote:

"Robina Brintha" <robina.brin...@gmail.com> wrote in message

news:1176214727.263803.43760@o5g2000hsb.googlegroups.com...

I have an aplication which will be run by different clients at a
time.
Each instance will first find if an update is needed through a method
in the application. The instance which finds that first will be the
coordinator who sends message(multicast) to all other instances.

[...]

Will the instances be running on the same computer, the same LAN,
or
over the internet?

instances run in same computer...

    Simplest solution is to try to acquire an exclusive resource in an
atomic fashion, and the first process to have successfully required this
resource is the "first" instance, and can act as the server or coordinator
or whatever.

    Example include listening on a specific port or trying to gain
exclusive write-access to a specific file.

    - Oliver