[Aspectsharp-users] Castle's Aspect# Facility

[hammett <ha...@uo...>]

Hello!

If you don't know Aspect#, please visit http://aspectsharp.sourceforge.net/

I though this one would be incredible complicated, as it involved the 
replacement of IProxyFactory implementation but it was not that difficult. 
Please note that Castle has an interceptor framework 
[http://www.castleproject.org/containerdocs/interceptors], so I had to mix 
the aspect# interceptor chain with the Castle interceptor chain. The 
approach was simple: the Aspect# chain is one step in the castle interceptor 
chain. I hope people can understand the design, I re-read the paragraph, and 
its not much clear at all :-\

With this integration one can use the configuration related to the Aspect# 
facility to act on the components on the container. For example, follows the 
configuration:

<configuration>
 <facilities>
  <facility id="aspectsharp">
     <![CDATA[
        import Castle.Facilities.AspectSharp.Tests.Components in 
Castle.Facilities.AspectSharp.Tests
        import Castle.Facilities.AspectSharp.Tests.Interceptors in 
Castle.Facilities.AspectSharp.Tests

        interceptors [ "key" : LoggerTraceInterceptor ]
        mixins [ "key" : SecurityMixin  ]

        aspect ProtocolHandlerLogger for [ 
assignableFrom(IProtocolHandler) ]
            include "key"
            pointcut method(*)
                advice("key")
            end
        end

        // You can define as many aspect as you want here...
  ]]>
  </facility>
 </facilities>
</configuration>


So in this case, each component on the container that is assignable from 
IProtocolHandler will use the LoggerTraceInterceptor.
They also have a mixin (SecurityMixin).

One fake implementation of IProtocolHandler:

 public class MessengerProtocolHandler : IProtocolHandler
 {
  public MessengerProtocolHandler()
  {
  }

  public void Handle(String contents)
  {
  }
 }

--> Note that the Handle method is not virtual!  :-)


This is a snippet from one of the test cases, by the way, so here is the 
code:


XmlConfigurationStore store = new 
XmlConfigurationStore("../aop_castle_config.xml");
WindsorContainer container = new WindsorContainer( store );

container.AddFacility( "aspectsharp", new AspectSharpFacility() );

// Logger implementation
container.AddComponent( "logger", typeof(ILogger), typeof(MemoryLogger) );

// AopAlliance interceptors
container.AddComponent( "log4netinterceptor", 
typeof(LoggerTraceInterceptor) );

// Protocol handlers
container.AddComponent( "protocolhandler.miranda",
 typeof(IProtocolHandler), typeof(MirandaProtocolHandler) );
container.AddComponent( "protocolhandler.messenger",
 typeof(IProtocolHandler), typeof(MessengerProtocolHandler) );

// using...
ILogger logger = (ILogger) container[ typeof(ILogger) ];
Assert.AreEqual( 0, logger.Contents.Length );

IProtocolHandler handler = (IProtocolHandler)
 container[ "protocolhandler.miranda" ];
handler.Handle( "contents" );

handler = (IProtocolHandler) container[ "protocolhandler.messenger" ];
handler.Handle( "contents" );

Assert.AreEqual( "Entering Handle Leaving Handle Entering Handle Leaving 
Handle ",
 logger.Contents );


The code can be found here
http://svn.digitalcraftsmen.com.br/svn/castle/trunk/Facilities/AspectSharp/Castle.Facilities.AspectSharp/
Its only 5 small classes, the test cases took more time to write... :-\
TDD my arse! :-(


More at
http://svn.digitalcraftsmen.com.br/svn/castle/trunk/Facilities/AspectSharp/

I'm looking forward to working on
- ActiveRecord facility
- MyXAML facility (http://www.myxaml.com/)


--
Cheers,
hammett
http://www.digitalcraftsmen.com.br/~hammett