Re: [OS-webwork] Is This a Bad Use of IoC?

[Matthew E . Porter]

What is the planned intergration with Spring?

Cheers,
  matthew


On Thursday, August 7, 2003, at 08:57 PM, Jason Carreira wrote:

I think we need to get the project for external integrations going. I
got a note from Rod Johnson about this too, and I think it would be a
great idea to have integrations with Spring and Picocontainer, but  
these
need to be in a separate project. We're explicitly limiting  
dependencies
in Xwork / WebWork as much as possible.

Jason

-----Original Message-----
From: Rob Rudin [mailto:[EMAIL PROTECTED]
Sent: Thursday, August 07, 2003 9:39 PM
To: [EMAIL PROTECTED]
Subject: Re: [OS-webwork] Is This a Bad Use of IoC?
Not to sound like a broken record, but I think Spring does a
nice job of handling Hibernate. It provides a Hibernate
template to handle the Hibernate plumbing and nice support
for configuring a SessionFactory. Should be very easy to hook
this into WW2's IoC.
Rob

----- Original Message -----
From: "Matthew E. Porter" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, August 07, 2003 8:38 PM
Subject: [OS-webwork] Is This a Bad Use of IoC?

I think I may be going Inversion of Control mad lately and
need some
help sorting out if what I am doing is just wrong.  I am building a
new persistence manager where the core manager is based upon
hibernate. The hibernate manager needs three different
providers- one
for Configuration, one for SessionFactory, and one for
Sessions.  Each
of these providers (Conf, SF, and Session) can have different
implementations.  For example, the default Session provider always
returns a new session; however, there is also a ThreadLocal version
which returns the same session for the entire thread.
The question I have is how do I specify and load these at runtime?
The most obvious answer is to have a custom xml file that specifies
which provider fulfills each role.  I could write (and already have
done so) a loader to read an XML file and configure the
system.  But,
instead of having this in a separate file, would it be a complete
bastardization of the intention of IoC (XWork edition) to use it to
automatically configure the providers?
Why does this seem bad?  Because the primary intention of IoC is to
wire business components whereas these providers will
probably never
be used outside the real component, the persistence
manager.  Instead,
it seems like I am too lazy to write a loader to configure
the system.


Cheers,
   matthew


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