This makes sense. My Singleton class, since it's common for all virtual hosts, sits in the default classpath. Can I define a class path for the class loader of each web app so that the default class loader is never invoked?
----- Original Message ----- From: "nathan phillips" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, February 18, 2002 5:20 PM Subject: Re: Virtual Hosts problem with Singleton Class > > The singletons should work fine I believe. Each web application will get > its own classloader which will load only one instance of each singleton. > Since web application classloader have no insight to any other web > application class loader, this shouldn't be an issue. Insure that your > singleton is located only in your war file and didn't accidently end up on > your classpath somehow. If this happens, then of course the default > classloader will load your class and your web applications will use that > instance. > > > > From: "Haris Papadopoulos" <[EMAIL PROTECTED]> > Reply-To: "Tomcat Users List" <[EMAIL PROTECTED]> > To: "Tomcat Users List" <[EMAIL PROTECTED]> > Subject: Re: Virtual Hosts problem with Singleton Class > Date: Mon, 18 Feb 2002 19:03:12 +0200 > MIME-Version: 1.0 > Received: from [192.18.49.131] by hotmail.com (3.2) with ESMTP id > MHotMailBE3A7EC000CB40043896C0123183D62F0; Mon, 18 Feb 2002 09:02:57 -0800 > Received: (qmail 7506 invoked by uid 97); 18 Feb 2002 17:02:40 -0000 > Received: (qmail 7495 invoked from network); 18 Feb 2002 17:02:39 -0000 > >From tomcat-user-return-11314-nathanpp Mon, 18 Feb 2002 09:04:24 -0800 > Mailing-List: contact [EMAIL PROTECTED]; run by ezmlm > Precedence: bulk > List-Unsubscribe: <mailto:[EMAIL PROTECTED]> > List-Subscribe: <mailto:[EMAIL PROTECTED]> > List-Help: <mailto:[EMAIL PROTECTED]> > List-Post: <mailto:[EMAIL PROTECTED]> > List-Id: "Tomcat Users List" <tomcat-user.jakarta.apache.org> > Delivered-To: mailing list [EMAIL PROTECTED] > Message-ID: <00b401c1b89e$25e73ee0$[EMAIL PROTECTED]> > References: <[EMAIL PROTECTED]> > X-Priority: 3 > X-MSMail-Priority: Normal > X-Mailer: Microsoft Outlook Express 6.00.2600.0000 > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 > X-Message: scanned for viruses by DATAWAYS SMTP ANTIVIRUS SERVICE > ([EMAIL PROTECTED]) > X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N > > I agree. But what about contexts? Since I come from Resin, the > implementation there is different. The Singleton object is created once for > a separate context. Is this an implementation isssue? > > ----- Original Message ----- > From: "Mark Ayad" <[EMAIL PROTECTED]> > To: "Tomcat Users List" <[EMAIL PROTECTED]>; > <[EMAIL PROTECTED]> > Sent: Tuesday, February 19, 2002 3:45 AM > Subject: RE: Virtual Hosts problem with Singleton Class > > > > something your missing > > > > A Singleton by it's name creates only a single instance of an object > (hence > > it marshalls object creation i.e. one instance) which is totally > acceptable > > for a DB connection pool. > > > > Regards > > > > Mark > > > > -----Original Message----- > > From: Haris Papadopoulos [mailto:[EMAIL PROTECTED]] > > Sent: 18 February 2002 08:38 > > To: [EMAIL PROTECTED] > > Subject: Virtual Hosts problem with Singleton Class > > > > > > Hi, > > I 've configured two virtual hosts under Tomcat 4.0.1 working with Apache > > 1.3.20. They both load (on startup) a Servlet which creates a Singleton > > object that (in turn) creates a DB pool. Both servlets are defined in the > > separate web.xml files. > > It seems that the second servlet does not create the pooling object but > > instead it gets an Instance of the one created by the first one (strange > > enough since they exist in different contexts). > > Everything else seems to work in the appropriate virtual host context. Is > > this a matter concerning Singleton objects and maybe a bug, or is there > > something I 'm missing? > > We 're trying to migrate to Tomcat from Resin and I haven't found any > > relative info so far regarding this problem. > > Thanks in advance. > > > > > > -- > > To unsubscribe: <mailto:[EMAIL PROTECTED]> > > For additional commands: <mailto:[EMAIL PROTECTED]> > > Troubles with the list: <mailto:[EMAIL PROTECTED]> > > > > > > -- > To unsubscribe: <mailto:[EMAIL PROTECTED]> > For additional commands: <mailto:[EMAIL PROTECTED]> > Troubles with the list: <mailto:[EMAIL PROTECTED]> > > > > > > _________________________________________________________________ > Send and receive Hotmail on your mobile device: http://mobile.msn.com > > > -- > To unsubscribe: <mailto:[EMAIL PROTECTED]> > For additional commands: <mailto:[EMAIL PROTECTED]> > Troubles with the list: <mailto:[EMAIL PROTECTED]> -- To unsubscribe: <mailto:[EMAIL PROTECTED]> For additional commands: <mailto:[EMAIL PROTECTED]> Troubles with the list: <mailto:[EMAIL PROTECTED]>
