Funny, I never managed to get it to *not* re-use tags (haven't rev'd up to
latest release tho) regardless of the jsp.reuse.tags setting...
Trevor
On Thu, 1 Mar 2001, Jonathan James wrote:
> Actually it's configurable. Just add "-Djsp.reuse.tags=[false|true]" to your
> command line when you launch the server.
>
> Jonathan
> ----- Original Message -----
> From: "Randahl Fink Isaksen" <[EMAIL PROTECTED]>
> To: "Orion-Interest" <[EMAIL PROTECTED]>
> Sent: Thursday, March 01, 2001 2:47 AM
> Subject: RE: In Orion, are tag handler instances reused or reinstantiated?
>
>
> > Experience tells me they are reused in Orion. If I have an optional tag
> > attribute on a tag and the tag is used multiple times on a page I have
> found
> > out that I need to make sure that any contents set in the optional
> attribute
> > must be cleared manually by me, or I will get whatever contents was set by
> a
> > previous invokation of the tag.
> >
> >
> > Yours
> > Randahl
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Blacha, Bart
> > Sent: 28. februar 2001 19:27
> > To: Orion-Interest
> > Subject: In Orion, are tag handler instances reused or reinstantiated?
> >
> >
> > We are trying to figure out if tag handler objects are re-used, or
> > instantiated-and-destroyed at every request. This is obviously important
> > for performance reasons.
> >
> > There is conflicting information in JSP spec and on JGuru (see references
> > below). So maybe it's an implementation-specific issue. Which brings me
> > to the question:
> >
> > What does Orion do with tag handler instances? Reuse or reinstantiate
> them?
> >
> >
> >
> >
> > JSP spec 1.1, paragraph 5.4.7:
> >
> > At execution time the implementation of a JSP page will use an available
> Tag
> > instance with
> > the appropriate prefix and name that is not being used, initialize it, and
> > then follow the
> > protocol described below. Afterwards, it will release the instance and
> make
> > it available for
> > further use. This approach reduces the number of instances that are needed
> > at a time.
> >
> >
> > http://www.jguru.com/jguru/faq/view.jsp?EID=337618
> >
> > Question We want to make sure that our JSP development efforts are
> > thread-safe. Is it possible that two threads will access one instance of a
> > JSP custom tag handler concurrently?
> >
> > No it is not possible. There is a defined lifecycle of a custom tag, and
> > during this lifecycle, that instance of the tag will only get called once.
> > Hopefully in newer implementations of JSP engines, the actual tag object
> > will not get reinstantiated each time (as this negatively affects
> > performance), but at least during it's use, it will be thread safe.
> >
> >
> > --
> > Bart Blacha, Software Developer
> > NetPerceptions Inc.
> > (512) 349-5622
> > [EMAIL PROTECTED]
> >
> >
> >
> >
> >
>
>
