Solving the Enterprise Services config dilemma. Here's a little variation of System.EnterpriseServices.ServicedComponent that activates classes derived from ServicedComponentEx in a freely configurable, non-default app-domain and roots them in the directory of the assembly containing the component and not system32. TODO: Add support for custom config files based on COM+ package name, proper security setup, etc; Still, I am tired, so I am posting anyways ;) G'night. using System; using System.Runtime.InteropServices;
using System.EnterpriseServices;
using System.IO;
using System.Reflection;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Proxies;
using System.Runtime.Remoting.Contexts;
namespace newtelligence.EnterpriseServices
{
[AttributeUsage(AttributeTargets.Class)]
public class ServicedComponentExProxyAttribute :
ProxyAttribute, ICustomFactory
{
ProxyAttribute _base;
Type currentType;
static AppDomain appDomain = null;
public ServicedComponentExProxyAttribute()
{
_base = (ProxyAttribute)typeof(ServicedComponent).GetCustomAttributes(typeof(ProxyAttribute),false)[0];
}
public override MarshalByRefObject CreateInstance(Type serverType)
{
return _base.CreateInstance(serverType);
}
public override RealProxy CreateProxy(ObjRef objRef,Type serverType,object serverObject,Context serverContext)
{
return _base.CreateProxy(objRef,serverType,serverObject,serverContext);
}
Assembly ResolveHelper(object o, ResolveEventArgs rargs)
{
if ( currentType.Assembly.FullName == rargs.Name )
{
return Assembly.LoadFrom(currentType.Assembly.Location);
}
else
{
return null;
}
}
MarshalByRefObject ICustomFactory.CreateInstance(Type serverType)
{
if ( AppDomain.CurrentDomain.FriendlyName == "myappdomain" )
{
return ((ICustomFactory)_base).CreateInstance(serverType);
}
else
{
if ( appDomain == null )
{
System.AppDomainSetup appDomainSetup = new AppDomainSetup();
appDomainSetup.ApplicationBase =
Path.Combine(Path.GetPathRoot(serverType.Assembly.Location),
Path.GetDirectoryName(serverType.Assembly.Location));
appDomainSetup.ApplicationName = "complus";
appDomain = AppDomain.CreateDomain("myappdomain",null,appDomainSetup);
}
ResolveEventHandler reh = new ResolveEventHandler(this.ResolveHelper);
currentType = serverType;
AppDomain.CurrentDomain.AssemblyResolve += reh;
MarshalByRefObject mbr = (MarshalByRefObject)appDomain.CreateInstanceFromAndUnwrap(
serverType.Assembly.Location,serverType.FullName);
AppDomain.CurrentDomain.AssemblyResolve -= reh;
currentType = null;
return mbr;
}
}
}
[ServicedComponentExProxyAttribute]
public class ServicedComponentEx : ServicedComponent
{
public ServicedComponentEx()
{
}
}
}
12:43:43 AM 
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