On 12/20/06, Craig McClanahan <[EMAIL PROTECTED]> wrote:
On 12/20/06, Virender Singh <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I am analysing commons-chain for use in our framework. Are there any
> frameworks/products that are using commons-chain api? I have heard of
> struts-chain. I do not have any idea as to how much is it in use? The list
> of products would help in convincing the team to use the api and that it
> is
> not another framework on which some work was done and then left in
> oblivion.
<snip-struts-and-shale-usecases/>
Chain fits best in a scenario where there is a detailed straight line flow,
and you can define your tasks in finely grained reusable pieces ("Commands"
in the Chain vocabulary) that can be assembled into customized sequences for
each task. Chain fits worst when you are trying to use it as a control
architecture for a workflow with lots of conditional branches. For that
case, you might look at a state machine architecture like the one supported
by Commons SCXML[2] instead.
<snap/>
And there are scenarios where leveraging both libraries ( [chain] and
[scxml] ) makes sense (typically by calling a command chain from
executable content within a SCXML document). Here [i] is a related
post from the archives.
-Rahul
[i] http://marc.theaimsgroup.com/?l=jakarta-commons-user&m=114375623812367&w=2
Craig
[1] http://shale.apache.org/
[2] http://jakarta.apache.org/commons/scxml/
Thanks,
> Virender
>
>
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