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From ktou Ho <hk...@hotmail.com>
Subject RE: Singleton in Tomcat 6.0 not working
Date Thu, 05 Jun 2008 17:11:21 GMT

I tried to change the web app to other name, it works fine now. (only one instance).  Look
like it is the "ROOT" cause all problem. Any one know why the ROOT is being called twice?
 
Thanks
Elwin> From: hktou@hotmail.com> To: users@tomcat.apache.org> Subject: RE: Singleton
in Tomcat 6.0 not working> Date: Thu, 5 Jun 2008 17:03:30 +0000> > > Have you
tried to put in it the "ROOT"? I guess may be something work it that. Also I created a filter
(MyFilter) to test it, the following got executed twice :> -------------> MyFilter.<init>()
line: 30 > NativeConstructorAccessorImpl.newInstance0(Constructor, Object[]) line: not
available [native method] > NativeConstructorAccessorImpl.newInstance(Object[]) line: 39
> DelegatingConstructorAccessorImpl.newInstance(Object[]) line: 27 > Constructor<T>.newInstance(Object...)
line: 513 > Class<T>.newInstance0() line: 355 > Class<T>.newInstance() line:
308 > ApplicationFilterConfig.getFilter() line: 255 > ApplicationFilterConfig.setFilterDef(FilterDef)
line: 397 > ApplicationFilterConfig.<init>(Context, FilterDef) line: 108 > StandardContext.filterStart()
line: 3709 > StandardContext.start() line: 4356 > StandardHost(ContainerBase).start()
line: 1045 > StandardHost.start() line: 719 > StandardEngine(ContainerBase).start()
line: 1045 > StandardEngine.start() line: 443 > StandardService.start() line: 516 >
StandardServer.start() line: 710 > Catalina.start() line: 578 > NativeMethodAccessorImpl.invoke0(Method,
Object, Object[]) line: not available [native method] > NativeMethodAccessorImpl.invoke(Object,
Object[]) line: 39 > DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25 >
Method.invoke(Object, Object...) line: 597 > Bootstrap.start() line: 288 > Bootstrap.main(String[])
line: 413 > > ----------> > From: john@kewlstuff.co.za> To: users@tomcat.apache.org>
Subject: Re: Singleton in Tomcat 6.0 not working> Date: Thu, 5 Jun 2008 17:19:57 +0200>
> > ----- Original Message ----- > From: "Mikolaj Rydzewski" <miki@ceti.pl>>
To: "Tomcat Users List" <users@tomcat.apache.org>> Sent: Thursday, June 05, 2008
5:06 PM> Subject: Re: Singleton in Tomcat 6.0 not working> > > > ktou Ho wrote:>
>> The problem I am facing is the Singleton is not working at all in the > >>
servlet. I tried to synchnozed the constructor or make it static. I > >> still get
two instances of the objects. How can I solve the problem?> > Is anyone able to reproduce
this?> > No, for fun I gave it a spin... it worked, one count> Think ktou is going
to have to post his code> Like chuck said, something fishy ;)> On NB its easy to mistakenly
set up glassfish as the server - ha ha> > > >> public class RemoteDBConnections>
>> {> >> private static RemoteDBConnections sInstance = new > >> RemoteDBConnections();>
>> private static int counter=0;> >> private RemoteDBConnections()> >>
{> >> System.out.println("counter =" + (counter++));> >>> > Add following
line (assuming you do not override default toString method):> >> > System.out.println(this.toString());>
>> > and compare results.> --------------------------------------------------------------------------->
HARBOR : http://www.kewlstuff.co.za/index.htm> The most powerful application server on
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