On Tue, 24 Sep 2002, Luca Ventura wrote: > Hello! > > Thank you very much for your help! :-) > > About the second question the reason I asked it is that one you > said: I need to implement the interface "SingleThreadModel", so for > performance reasons I would like to activate more separate instances > of the same servlet (or jsp-page) on Tomcat. I know there is a way > to do this (I read something about it in the past but I don't > remember where exactly...:-( ) but I don't know what it is.
I'll just jump in here and say that implementing SingleThreadModel is a bad idea. It'd be much better to just make your servlet thread-safe in the first place. It might take a little more analysis/up-front work, but in the long run it will be much better. > -----Messaggio originale----- > Da: A mailing list for discussion about Sun Microsystem's Java Servlet > API Technology. [mailto:[EMAIL PROTECTED]]Per conto di > Sanjeev Verma > Inviato: marted́ 24 settembre 2002 12.38 > A: [EMAIL PROTECTED] > Oggetto: Re: How to run multiple instances of JSP pages/servlets in > Tomca t? > > > Hi Luca, > > For your first question, check out the DTD of web.xml, the definition of the > <servlet> element is given as below: > > <!ELEMENT servlet (icon?, servlet-name, display-name?, description?, > (servlet-class | jsp-file), init-param*, load-on-startup?, run-as?, > security-role-ref*)> > > This clearly shows, that you can either give a <servlet-class> OR a > <jsp-file> after the servlet-name tag. > > Hence, to answer your question, the web.xml would look like this: > > <servlet> > <servlet-name>MyServlet</servlet-name> > <jsp-file>MyJSP.jsp</jsp-file> > <init-param> > <param-name>configFile</param-name> > <param-value>my.conf</param-value> > </init-param> > <load-on-startup>1</load-on-startup> > </servlet> > > This should do the trick. > > Regarding your second question, servlet and generated servlets out of JSPs > are accessed by multiple threads at the same time. Hence, there is really no > need for having multiple instances of a servlet. Every new client accesses > the same servlet instance thru' a new service thread. > > Still, if you need to have multiple instance for synchronization reasons, > explore the SingleThreadModel interface. I do not think you are looking for > this, but just in case. > > Best Regards > Sanjeev > > > > -----Original Message----- > From: Luca Ventura [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, September 24, 2002 3:47 PM > To: [EMAIL PROTECTED] > Subject: How to run multiple instances of JSP pages/servlets in Tomcat? > > > Hello everybody! > > In Tomcat 4.x I don't know how I can call automatically a JSP page when the > web application starts. > I mean...in Tomcat 4.x there is the web.xml file where I can declare: > > <servlet> > <servlet-name>MyServlet</servlet-name> > <servlet-class>MyServlet</servlet-class> > <init-param> > <param-name>configFile</param-name> > <param-value>my.conf</param-value> > </init-param> > <load-on-startup>1</load-on-startup> > </servlet> > > In this way the servlet "MyServlet" is called when the web app. starts... > > Can I do the same thing with a jsp page (the jsp page should be like a > servlet, in fact it is translated into a servlet when it is called the first > time)? If yes, in which way? > > Another questions: how can I tell the Web Server "Tomcat" to activate more > instances > of a servlet or a JSP page? > > Thanks a lot to everybody! > > Luca > > ___________________________________________________________________________ > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff SERVLET-INTEREST". > > Archives: http://archives.java.sun.com/archives/servlet-interest.html > Resources: http://java.sun.com/products/servlet/external-resources.html > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html > > ___________________________________________________________________________ > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff SERVLET-INTEREST". > > Archives: http://archives.java.sun.com/archives/servlet-interest.html > Resources: http://java.sun.com/products/servlet/external-resources.html > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html > > ___________________________________________________________________________ > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff SERVLET-INTEREST". > > Archives: http://archives.java.sun.com/archives/servlet-interest.html > Resources: http://java.sun.com/products/servlet/external-resources.html > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html > Milt Epstein Research Programmer Integration and Software Engineering (ISE) Campus Information Technologies and Educational Services (CITES) University of Illinois at Urbana-Champaign (UIUC) [EMAIL PROTECTED] ___________________________________________________________________________ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
