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From: Paul Libbrecht <paul@activemath.org>
Subject: Re: [jelly] certain way to evaluate a document (usecase)
Date: Mon, 10 Dec 2007 11:21:48 +0100
To: "Jakarta Commons Users List" <user@commons.apache.org>

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Evaldas,

the jelly script is loaded in memory then the doTag methods are called.
So, of course, it could not scale to kilometers of source, but, =20
indeed, then a fancy branching logic of doTag is doable.

hope it helps.

paul


Le 10 d=E9c. 07 =E0 09:42, Evaldas Taroza a =E9crit :

> Hi,
> Yes, I think I would need to implement something similar to the =20
> thread taglib. Because I will need something like:
> 1. There is a dedicated thread for every tag
> 2. Some threads are blocked by other threads (waiting to end)
> 3. Unblocked threads can run
>
> I haven't looked deep into Jelly yet, nor available taglibs, but =20
> what worries me is that the script engine is like SAX, so will I be =20=

> able to construct a difficult "execution plan" with only one-pass =20
> parsing?
>
> Evaldas
>
> Paul Libbrecht wrote:
>> Evaldas,
>> I believe that the answer to your question is that it is flexible.
>> Jelly's default follows Ant and SAX: most tag's doTag call =20
>> invokeBody which produces a depth-first execution. The thread =20
>> taglib does it differently though.
>> You might be well served with Jelly although it still has some =20
>> rough edges.
>> paul
>> Le 9 d=E9c. 07 =E0 17:16, Evaldas Taroza a =E9crit :
>>> Hi,
>>> I have a very specific usecase to program. Specifically, I need =20
>>> to be able to execute the tags in a certain order. For instance, =20
>>> I should be able to say that this tag is executing after another, =20=

>>> others can execute in parallel etc.
>>>
>>> So I am considering Jelly as already implementing the execution =20
>>> of the tags but what about the ordering? In what order are the =20
>>> tags executed now? Is it at all feasible to use Jelly for such a =20
>>> usecase or I will end up implementing a completely new Jelly =20
>>> script evaluation engine?
>>>
>>> Evaldas
>>>
>
>
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