Ted Husted on 24/07/06 15:22, wrote:
On 7/23/06, Adam Hardy <[EMAIL PROTECTED]> wrote:
Can anyone involved in struts 2 tell me about potential brick walls that
this sort of Action base class and its children would be heading into? I
checked out the dev list for hints and saw oblique references to Chain of
Commands but couldn't guage much from the threads there.
S2 doesn't use Commons Chain internally. S2 relies on the notion of
"interceptors" to do what we did in S1 with the Chain of Commands.
Essentially, interceptors are POJO filters that let us run custom code before
and after a key event, like invoking an Action class.
The package that delivers the interceptor mechanism is XWork. XWork also
handles matcing things like URIs to action mappings and it provides the base
validation framework. Surprisingly little is actually in Struts 2 itself.
Most of the functionality derives from XWork, which is web-neutral. XWork is
already being used to power other frameworks.
I've divided up my response as you may have noticed from the list of emails from
my email address.
It all looks very interesting. I just read some stuff on the xworks opensymphony
site and it looks pretty sound [1] and [2]. You guys must be working like dogs,
there seems to be so much there to integrate. Kudos and respect to you all, this
seems to be more and more important the more I find out.
I am pondering on the command/dispatch style action mechanism like
DispatchAction where the dispatch switch is based on an HTTP parameter
identified by its prefix.
Would that mechanism be implemented by a pre-action listener? I'm trying to pick
up the lingo on the hoof here [2].
On a semantic note, are you really going to have <interceptor-ref> tags in
struts-config? Or are you changing the name to something more, ahem, user-friendly?
Regards
Adam
[1] http://xwork.dev.java.net/servlets/NewsItemView?newsItemID=665
[2] http://confluence.twdata.org/display/WW/Interceptors
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