Set Default Interceptor Unity Extension
With Unity, it is quite easy to implement an extension that automatically sets the appropriate interceptor for each registered type.
Here is how I did it:
public
class DefaultInterceptorInterceptionExtension : Interception
{
private static readonly IInterceptor [] interceptors = null; static DefaultInterceptorInterceptionExtension()
{
interceptors = (
from interceptorType in (from type in typeof(IInterceptor).Assembly.GetExportedTypes()
where typeof(IInterceptor).IsAssignableFrom(type) && type.IsAbstract == false &&
type.IsInterface ==
false select type) select Activator.CreateInstance(interceptorType) as IInterceptor).ToArray();
}
protected override void Initialize()
{
base.Initialize(); IConfigurationSource configSource = ConfigurationSourceFactory.Create();
PolicyInjectionSettings section = configSource.GetSection(PolicyInjectionSettings.SectionName) as PolicyInjectionSettings; if (section != null)
{
section.ConfigureContainer(this.Container, configSource);
}
this.Context.Registering += new EventHandler<RegisterEventArgs>
(
delegate(Object sender, RegisterEventArgs e)
{
this.setInterceptorFor(e.TypeFrom, e.TypeTo, e.Name);
}
);
this.Context.RegisteringInstance += new EventHandler<RegisterInstanceEventArgs>
(
delegate(Object sender, RegisterInstanceEventArgs e)
{
this.setInterceptorFor(e.RegisteredType, e.Instance.GetType(), e.Name);
}
);
}
private void setInterceptorFor(Type typeToIntercept, Type typeOfInstance, String name)
{
foreach (IInterceptor interceptor in interceptors)
{
if ((interceptor.CanIntercept(typeToIntercept) == true) && (interceptor.GetInterceptableMethods(typeToIntercept, typeOfInstance).Count() != 0))
{
if (interceptor is IInstanceInterceptor)
{
this.Container.Configure<Interception>().SetDefaultInterceptorFor(typeToIntercept, interceptor as IInstanceInterceptor);
}
else if (interceptor is ITypeInterceptor)
{
this.Container.Configure<Interception>().SetDefaultInterceptorFor(typeToIntercept, interceptor as ITypeInterceptor);
}
break;
}
}
}
}
And you register with like this:
<unity>
<
typeAliases> <typeAlias alias="singleton" type="Microsoft.Practices.Unity.ContainerControlledLifetimeManager, Microsoft.Practices.Unity, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
<
typeAlias alias="transient" type="Microsoft.Practices.Unity.TransientLifetimeManager, Microsoft.Practices.Unity, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> <typeAlias alias="external" type="Microsoft.Practices.Unity.ExternallyControlledLifetimeManager, Microsoft.Practices.Unity, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
<
typeAlias alias="thread" type="Microsoft.Practices.Unity.PerThreadLifetimeManager, Microsoft.Practices.Unity, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </typeAliases>
<
containers> <container>
<
extensions> <add type="DefaultInterceptorInterceptionExtension, SomeAssembly" />
</
extensions>
</container>
</containers>
<unity>
