Re: commons-chain: joining with struts

Joe Germuska Wed, 15 Dec 2004 13:05:52 -0800

As one of the Struts developers who is very keen on moving chain-integration forward, I'll say a few brief words. I'm not on the commons-user list, but I will say that Sean's right that this discussion is best suited to struts-dev. (I'll leave commons-user on this message, but I'd encourage anyone else who responds to only reply to [EMAIL PROTECTED])

Anyway, we've talked about a StrutsWebContext, and in fact, we've talked about a few different subclasses of o.a.c.chain.Context for use in different phases of the request process. You may want to look through the mailing list archives, as this has been a pretty active topic of discussion in the last 2-3 months.

Now that Chain has hit a full release, we are definitely planning on moving ahead with changing the default request processor in Struts to be based on commons-chain. The struts-chain project which is currently available from the subversion repository is a very healthy working implementation. The migration to the Struts core will mostly involve building in a mechanism for initializing any number of catalogs (obsoleting a Plugin class which does it in struts-chain).

But I absolutely agree that it makes sense to make type-safe subclasses of Context which clarify the names and types of important participants in the Struts request processing chain. I would only argue that we'd probably like to keep "Web" from being too visible, as we feel in Struts that it would be good to decrease explicit dependencies on the Servlet API.

Best,
        Joe

At 1:18 PM -0500 12/15/04, Sean Schofield wrote:

Pedro,

A StrutsWebContext class might be an interesting idea.  If adopted, it
should go in the struts-chain project as opposed to commons-chain.  (I
am sending a copy of this response to the struts-dev mailing list
which is probably the best place to propose this kind of enhancement).

I'm not sure how useful it would be to have the ActionForm in your
commands but I don't work a lot on struts-chain so maybe others have
an opinion on that.

If you decide to go ahead with submitting an official patch (or just
using it in your own projects) the code should probably be modified to
take advantage of recent changes to commons-chain.

Specifically, you can now use CatalogFactory to get a copy of the
catalog you're interested in.  Just make sure to setup the
o.a.c.c.w.ChainListener with the appropriate parameters, and it will
configure the catalog when the webapp starts and it will automatically
be available to any java class using the same class loader (including
your proposed CommandAction).

-- Joe Germuska [EMAIL PROTECTED] http://blog.germuska.com "Narrow minds are weapons made for mass destruction" -The Ex

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Re: commons-chain: joining with struts

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