Re: design pattern

From: Nick Malik [Microsoft] (nickmalik_at_hotmail.nospam.com)
Date: 02/25/05 

Date: Fri, 25 Feb 2005 08:30:26 -0800

The pattern is called Inversion of Control. It is heavily described in
various literature and forms the basis of a branch of computing called
Aspect Oriented Programming.

There is a port of the AOP framework "Spring" in the .Net spaces available
here:
http://www.springframework.net/

This is an exciting area, and I encourage you to dig in. 

-- 
--- Nick Malik [Microsoft]
    MCSD, CFPS, Certified Scrummaster
    http://blogs.msdn.com/nickmalik
Disclaimer: Opinions expressed in this forum are my own, and not 
representative of my employer.
   I do not answer questions on behalf of my employer.  I'm just a 
programmer helping programmers.
--
"Hugo Batista" <hlbatistaATgmail@nospam.com> wrote in message 
news:eEYm0IzGFHA.2136@TK2MSFTNGP14.phx.gbl...
> Hi everybody,
>
> I would like to have your opinion...
>
>
> Imagine i have a pattern that defines:
>
> - abstract factory : my consumer always handle with a interface and not 
> with direct implementation, and calls a factory to get an object instance;
> - the kind of object returned in that instance varies according to some 
> settings and, in runtime, the factory reads settings and return the 
> configured object type that implements interface;
> -Singleton/singlecall: the returned object can be singleton or singlecall 
> and that can be changed in settings at any time. The consumer should not 
> care about this and the factory handles this to know if he should mantain 
> a singleton instance or not;
> - inproc/outproc : the object can be a remote one or a local one. the 
> consumer does not know this and the factory handles it all. that is also 
> defined in settings;
>
>
> a settings example:
>
>   <PatternProviderSettings xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
>    <ObjectMode>SingleCall</ObjectMode>
>    <AllowWeakReferenceOnSingleton>false</AllowWeakReferenceOnSingleton>
>    <ProcessModel>InProc</ProcessModel>
>    <RemotingUrl>tcp://localhost:9999/LocalPatternsProvider</RemotingUrl>
>    <Provider>DotNetX.CodeGeneration.Patterns.LocalPatternsProvider,
> DotNetX.CodeGeneration</Provider>
>   </PatternProviderSettings>
>
>
>
> - Objectmode allows singleton or singlecall
> - AllowWeakReferenceOnSingleton indicates to the factory if he should keep 
> a weakreference or a reference, so the GC can handle it if needed
> - ProcessModel indicates inproc or outproc
> - RemotingUrl indicates the object remote url if outproc
> - Provider indicates the final implementation (the type of object to be 
> created)
>
>
> my question is:
> between existing enterprise patterns, which do you think that apply to 
> this ? i already know that abstract factory applys, but i wonder if other 
> also apply ... what about strategy design pattern ? do you think it 
> applies ?
>
>
> regards!
> and thanks for your contribution..
> HB
>
> www.dotnetx.org
>
>
>

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