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Posted to users@tomcat.apache.org by Feris Thia <fe...@gmail.com> on 2006/09/08 11:11:10 UTC
Singleton and ServletContext
Dear All,
Is there anyone can point me to any sample how to use singleton object
across web application in Tomcat ?
--
Regards,
Feris
PT. Putera Handal Indotama
JL. KH. Moh. Mansyur No. 11 Blok B.8-12
Telp. +62-21-631 6688 (Hunting)
Fax. +62-21-6330211
Jakarta (10140) - INDONESIA
Re: Singleton and ServletContext
Posted by Marc Farrow <ma...@gmail.com>.
Would you not accomplish the same thing by placing it in shared/lib instead
of common/lib? My understanding is that common/lib is also used by Tomcat
engine itself and also all webapps while the shared/lib is just shared among
all webapps? Am I mistaken?
On 9/8/06, DJohnson@desknetinc.com <DJ...@desknetinc.com> wrote:
>
> I'll assume you mean shared between separate web applications, as, within
> a single web app. is nothing special. The key is the classloader. In
> order for the singleton to be a true singleton, (not one fo reach webapp)
> it must be loaded rom a common classloader. So the jar it is loaded from
> should probably be in common/lib. See
> http://tomcat.apache.org/tomcat-4.1-doc/class-loader-howto.html for more
> on Tomcat classloader hierarchy.
>
>
>
> Please respond to "Tomcat Users List" <us...@tomcat.apache.org>
>
> To: "Tomcat Users List" <us...@tomcat.apache.org>
> cc:
> Subject: Singleton and ServletContext
>
>
>
> Dear All,
>
> Is there anyone can point me to any sample how to use singleton object
> across web application in Tomcat ?
>
> --
> Regards,
> Feris
> PT. Putera Handal Indotama
> JL. KH. Moh. Mansyur No. 11 Blok B.8-12
> Telp. +62-21-631 6688 (Hunting)
> Fax. +62-21-6330211
> Jakarta (10140) - INDONESIA
>
>
>
>
--
Marc Farrow
Re: Singleton and ServletContext
Posted by DJ...@desknetinc.com.
I'll assume you mean shared between separate web applications, as, within
a single web app. is nothing special. The key is the classloader. In
order for the singleton to be a true singleton, (not one fo reach webapp)
it must be loaded rom a common classloader. So the jar it is loaded from
should probably be in common/lib. See
http://tomcat.apache.org/tomcat-4.1-doc/class-loader-howto.html for more
on Tomcat classloader hierarchy.
Please respond to "Tomcat Users List" <us...@tomcat.apache.org>
To: "Tomcat Users List" <us...@tomcat.apache.org>
cc:
Subject: Singleton and ServletContext
Dear All,
Is there anyone can point me to any sample how to use singleton object
across web application in Tomcat ?
--
Regards,
Feris
PT. Putera Handal Indotama
JL. KH. Moh. Mansyur No. 11 Blok B.8-12
Telp. +62-21-631 6688 (Hunting)
Fax. +62-21-6330211
Jakarta (10140) - INDONESIA