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]
>
>
>
>
>
