Hi Bart,
It seems that the tags are re-used only when called multiple times inside
the same page. At least that is my experience with versions up to 1.4.5
Huibert
on 3/1/01 2:25 PM, Trevor Squires at [EMAIL PROTECTED] wrote:
>
> 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]
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>
