Tag reuse is the default behavior for Jasper2 used
in Tomcat 4.1.x.
Check the docs at
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jasper-howto.html
Configuration parameter "enablePooling" determines whether tag
handler pooling is enabled. It defaults to true.
The following references will give you better insight
into "tag-reuse" and should help you fix the implementation
of your tags so they can behave properly in containers
that support tag-reuse.
JSP 1.2: Great News for the JSP Community, Part 2
[Written by Hans Bergsten. Check the section on
"Tag handler life cycle and instance reuse"]
http://www.onjava.com/pub/a/onjava/2001/11/07/jsp12.html
Taglib Developer Guidelines
[Written by Shawn Bayern. You won't have any more problems
with tag reuse if you follow these guidelines]
http://jakarta.apache.org/taglibs/guidelines.html
-- Pierre
Tony Colson wrote:
>
> I have read various email trails and looked at the JSP
> 1.2 spec and am still unclear on something regarding
> custom tags:
>
> I recently upgraded to tomcat 4.1.18 which uses the
> JSP 1.2 spec and in the case
>
> <custom:TagA>
> <custom:TagB />
> </custom:TagA>
>
> where TagA re-evaluates the body several times, it
> seems that TagB only gets instantiated once and
> re-used. This doesn't seem right to me (even after
> reading the specs) especially since it worked with
> previous versions os tomcat using JSP 1.1. I would
> think that after the TagB.doEndTag() function the
> container would release() it and thus neccessitate the
> creation of a new TagB object on the next iteration.
>
> This is important to me because I have underlying data
> structures which are not behaving correctly because of
> this.
>
> Is this a bug? Are there ways to "force" it to always
> instantiate a new TagB? Are there alternate
> containers we can use?
>
> Thanks
> Tony
>
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