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Struts & Hibernate
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| | | Need to start one Java thread in one instance of clustered env | Need to start one Java thread in one instance of clustered env 2003-12-29 - By Sullivan, Sean C - MWT
Back
JBoss 3.x has a feature called "Singleton Service"
It allows you to run code on a single node in a cluster.
http://www.onjava.com/pub/a/onjava/2003/08/20/jboss_clustering.html
I'm not sure if Weblogic Server 8.1 has similar functionality.
-Sean
> -- --Original Message-- --
> From: An interest list for Sun Java Center J2EE Pattern Catalog
> [mailto:J2EEPATTERNS-INTEREST@(protected)] On Behalf Of Radha,
> Senthilnathan
> Sent: Tuesday, December 23, 2003 1:58 PM
> To: J2EEPATTERNS-INTEREST@(protected)
> Subject: Need to start one Java thread in one instance of clustered
env
>
> While migrating my J2EE application from WL5.1 to WL8.1, I am facing
the
> following issue.
>
> Objective:-
> I need to call one startup class only in one instance across the
cluster.
>
> Description:-
> I had written a Servlet(with
<load-on-startup>1</load-on-startup>),this
> Servlet will be called
> when I start application server. Then inside the init method of this
> Servlet
> I am calling
> another RMI thread from this Servlet.Since this piece of code shared
by
> cluster with 4 instances
> this thread is running on all the 4 instances in the clustered
> environment.
> I need to call this RMI thread
> class only in one instance across the cluster. This thread needs to
call
> EJB, which is packaged with EAR file.
> That is the reason I can't make it as a start up class and assign it
to
> single server, I need to keep
> all the startup classes in system class path. Since system class path
has
> top in class path hierarch
> I can't access EJBs which are packaged with ear file.
>
> Your thoughts on this highly appreciated.
>
> Thanks
> Senthil
>
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