[Mono-list] A Plugin and WebService Issue

Pablo Fischer pablo@pablo.com.mx
Thu, 20 May 2004 10:03:46 -0500

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Thanks people!

When I start writing my app (mbloggy) I was using Interfaces as plugins
(xmlrpc plugins), then I started reading info about SOAP and I'm in love
with it, the fact that SOAP supports any encoding makes me happy :-).

What I was looking for is to do the same that "Plugins in Mono" (M.
Icaza) says :-).

However, I'd like to ask something else: I want EVERY plugin be compiled
like I want, yeah, when I compile the plugin (the .dll) I'd like to
check the methods and validate the plugin, if the plugin is ok, compile
it and add some Assembly Info (AssemblyInfo, right?), where should I
look?, NUnit I think is to check compiled applications but I want to
'check' my code BEFORE being a .dll.

El jue, 20-05-2004 a las 05:38, RoBiK escribi=F3:
> Hi,
> I would use this approach:
> 1) you must have a plug-in Interface defined, that each plug-in must
> implement
> 2) when the application starts, use static System.IO.Directory.GetFiles()
> method to get the names of assemblies in the plug-in directory
> 3) for each plug-in-assembly file call static
> System.Reflection.Assembly.LoadFrom() method to load the assembly into th=
> current AppDomain, then call the method
> System.Reflection.Assembly.GetTypes() on the System.Reflection.Assembly
> instance that you've got from the previous LoadFrom() method
> 4) for each Type that you get from previous GetType() method use the "is"
> operator to check if the particular type implements the plug-in interface=
> if it does, you have a type that implements your plug-in interface.=20
> 5) call static Syste.Activator.CreateInstance() method with the type from
> previous step as parameter. Cast the result to the plug-in-interface type
> and store it for example in an array for later use.
> 6) now you have an array of plug-in instances and can call the interface
> methods on them
> This is just an example, there are several other approaches which are mor=
> or less similar to this one... everything depends on the needs of your
> application.
> RoBiK
> Quoting Pablo Fischer <pablo@pablo.com.mx>:
> > Hi!
> >
> > I would like to have some comments and suggestions about a issue.
> >
> > I am working in a Blog Client (mbloggy) that will work ONLY in SOAP (NO
> > XMLRPC) for different CMS and Blogs (phpnuke, postnuke, jaws, etc, etc)=
> > To work with all these blogs I'm  planning to use a 'plugin' system,
> > based in assemblies, for example:
> >
> > If a developer wants the plugin for a CMS (like drupal), he can save hi=
> > .dll plugin in ~./mbloggy/plugins and when mbloggy starts it will read
> > default plugins (in /etc/mbloggy) and the user plugins. When mbloggy
> > finds a new plugin it will be added to a 'drop down' (gtk#) so the user
> > can use it.
> >
> > My problem?, yes, I don't know which is the best option:
> >
> > a) Use .dll assemblies as plugins. But, how to connect to each plugin
> > from the front end?, exists a data type that can 'clone' another
> > object?, so I can do something like this:
> >
> > Wrapper wrap =3D new Wrapper();
> > wrap.Clone("assemblie.dll");
> > wrap.Url =3D "http://www.foo.bar.com/foo.aspx?wsdl"
> > wrap.DeletePost(3);
> >
> > So I can use the 'methods' of assemblie.dll in the wrap object?.
> >
> > b) Or use just one .dll and let the developers to 'develop' just the
> > WebService (server)?, So I can just work like this:
> >
> > Client c =3D new Client();
> > c.Url =3D "http://www.foo.bar.com/foo.aspx?wsdl"
> > c.DeletePost(3);
> >
> > Which is the best option? and where can I find more information for the
> > best option?.
> >
> > Thanks!
> > Pablo
> > --
> > Pablo Fischer Sandoval (pablo [arroba/at] pablo.com.mx)
> > Fingerprint:  5973 0F10 543F 54AE 1E41  EC81 0840 A10A 74A4 E5C0
> > http://www.pablo.com.mx
> > http://www.debianmexico.org
> >
Pablo Fischer Sandoval (pablo [arroba/at] pablo.com.mx)
Fingerprint:  5973 0F10 543F 54AE 1E41  EC81 0840 A10A 74A4 E5C0

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