Configuring Castle Windsor using xml/app.config - castle-windsor

Question

I am currently building a sample application using Castle Windsor. The motto is to use xml/app.config to switch method interception on/off. I had used the Fluent API earlier and it worked as a charm. As the next step, I am trying to replace the fluent API with my xml.
The gist of the code is as follows:
A class called RandomOperations with two virtual methods.
A LoggingAspect class which implements IInterceptor.
A MyInterceptorsSelector class which implements IModelInterceptorsSelector
A Program.cs which had the fluent api syntax earlier and is now uses to only make calls to methods of RandomOperations class.
An app.config with a section called which has the xml syntax of registering components.
When I use the fluent api, I am able to intercept the method calls but I am unable to do it using the xml/app.config registration. Could someone please throw some light on what is being missed?
The classes are as follows:
RandomOperations.cs
public class RandomOperations
{
public virtual int MyRandomMethod(int x)
{
return x * x;
}
public virtual void Writer(string x)
{
Console.WriteLine(x);
}
}
LoggingAspect.cs
public class LoggingAspect : IInterceptor
{
public void Intercept(IInvocation invocation)
{
Console.WriteLine("Intercepted the call to " + invocation.Method.Name);
invocation.Proceed();
Console.WriteLine("After the method call, the return value is " + invocation.ReturnValue);
}
}
MyInterceptorsSelector.cs
public class MyInterceptorsSelector : IModelInterceptorsSelector
{
public bool HasInterceptors(ComponentModel model)
{
return typeof(LoggingAspect) != model.Implementation &&
model.Implementation.Namespace.StartsWith("ConsoleApplication1") ;
}
public InterceptorReference[] SelectInterceptors(ComponentModel model, Castle.Core.InterceptorReference[] obj)
{
var interceptors = new List<InterceptorReference>(model.Interceptors.Count + 1);
foreach (InterceptorReference inter in model.Interceptors)
{
interceptors.Add(inter);
}
return interceptors.ToArray();
}
}
Main in Program.cs
static void Main(string[] args)
{
var container = new WindsorContainer();
//container.Register(Component.For<RandomOperations>().Interceptors(typeof(LoggingAspect)));
//container.Register(Component.For<LoggingAspect>());
//container.Kernel.ProxyFactory.AddInterceptorSelector(new MyInterceptorsSelector());
var service = container.Resolve<RandomOperations>();
service.MyRandomMethod(4);
service.Writer("Hello, World");
}
Removing the commented out fluent api syntax makes the application work correctly.
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="castle" type="Castle.Windsor.Configuration.AppDomain.CastleSectionHandler, Castle.Windsor" />
</configSections>
<castle>
<components>
<component id="MyInterceptorsSelector" type="MyInterceptorsSelector"/>
<component
id="LoggingAspect"
type="ConsoleApplication1.LoggingAspect, ConsoleApplication1">
</component>
<component
type="ConsoleApplication1.RandomOperations, ConsoleApplication1">
<interceptors selector="${MyInterceptorsSelector}">
<interceptor>${LoggingAspect}</interceptor>
</interceptors>
</component>
</components>
</castle>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
</configuration>
Thanks in advance.

Answer 1

You need to pass an IConfigurationInterpreter to your Windsor constructor. Change:
var container = new WindsorContainer();
To:
var container = new WindsorContainer(new XmlInterpreter());
The XmlInterpreter (with no parameters) will pull configuration from your app.config/web.config.
For more options on using IConfigurationInterpreter, see the docs.