Keeping the server side object alive !!! 2007-01-15 - By Andre Prasetya
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I attach an example for you.
MigrationUtil is a helper class that needs initialisation when the webapp
started and needs cleaning when the webapp stopped
On 1/16/07, Luis Rivera <luiggiilca@(protected)> wrote:
>
> Dear Leon,
>
> Thanks for the info, I am reading about Contexts, but I am not sure if
> they
> are created as soon as tomcat starts. This listener seems to be event
> based,
> as long as an event is auto generated after Tomcat has started, it would
> work, or if there is another mechanism that can be used to generate the
> event that is automatic and that does not require a request from the
> client,
> I think it might work.
>
> Thanks in advance,
> --Luis R.
>
> On 1/15/07, Leon Rosenberg <rosenberg.leon@(protected)> wrote:
> >
> > I think what you need is a ContextListener. With it, you will be
> > notified when the context (webapp) starts and can perform
> > initialization, and when the context is destroyed you can perform
> > de-initialization (stop your threads, cleanup ressources and such).
> >
> > regards
> > Leon
> >
> > On 1/15/07, Luis Rivera <luiggiilca@(protected)> wrote:
> > > Hi,
> > >
> > > I would like to know how could I jump start my web service in tomcat
> > before
> > > any call from the client is made. My first version only needed to be
> > > stateless and that worked fine, since I noticed that each call from
> the
> > > client creates a new object in the server. However, now I would like
> to
> > > create some threads because I have a custom administration module
> > > (session/security/database).
> > >
> > > I can create them when the first call is made (using statics), but I
> > would
> > > like to get rid of the overhead in the first call by somehow jump
> > starting
> > > the application to do the loading and initialization that the
> > application
> > > threads need to do, so that the when the first call is made, there is
> no
> > > overhead to pay.
> > >
> > > I am not sure. Is this possible? I am probably not understanding fully
> > the
> > > servlet model or how tomcat/axis is supposed to be stateful at the
> > server
> > > side.
> > >
> > > I guess, if there is a smarter way to do this without using
> > threads/statics
> > > I would like to know where I could find an example.
> > >
> > > Thanks in advance,
> > > --Luis R.
> > >
> > >
> >
> > -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
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> >
> >
>
>
--
-Andre-
People see things the way they are and say "why ?" I see things that never
were and say "Why not ?"
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