ExamGuru IT/.Net Guru : SingleCall calling SingleTon object on microsoft.public.dotnet.framework.remoting

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SingleCall calling SingleTon object

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This message was discovered on microsoft.public.dotnet.framework.remoting.

Lord2702

Mon. Sep. 13, 2004 1:20 PM PT

Suppose, I have a server, which hosts two ExamGuruO's, one is SingleCall
(ExamGuruO_One) and another is SingleTon (ExamGuruO_Two). Both hosts on one server,
Now, client will call a function from ExamGuruO_One, which further calls a
function in ExamGuruO_Two. Is it possible to place this call. If possible, then
how do I activate the ExamGuruO_Two object, on ExamGuruO_One object side. Because Both
these objects are on one AppDomain, whereas Client is on separate domain.

Thanks.

Reply to this message...

Ken Kolda

Assuming it's your single-call object accessing your singleton, you can do
this two ways:

1) Marshal your singleton manually instead of using the
RemotingConfiguration.RegisterWellKnownServerObject(). This will allow you
to create a static instance of your remoted class which is accessible both
by remote objects and objects in the same AppDomain. For example:

class MySingletonObject : MarshalByRefObject
{
public static MySingletonObject RemotedObject = new MySingletonObject();
}

class MyServer
{
public static void Main()
{
// Marshal object manually
RemotingServices.Marshal(MySingletoneObject.RemotedObject,
"Singleton.rem");
}
}

class MySingleCallObject : MarshalbyRefObject
{
public void SomMethod()
{
MySingletonObject.RemotedObject.SomeOtherMethod();
}
}

2) You can actually make your server a client of itself. In your SingleCall
object's methods, you would use Activator.GetObject() to fetch a reference
to the Singleton. This will be slower because you're actually going out thru
remoting and back in with each method call, but it requires less work. Plus,
if the object you're calling is SingleCall instead of Singleton, this is the
only way to do it (beside various techniques of wrapping the single-call
object).

Hope that helps -
Ken

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Lord2702

Yes that helps a lot, I actually thought of making SingleTon ExamGuruO as
Singleton, but then stop, at the point that hey, as already this object is A
Singleton, but then in your design, it makes me simple to access the static
instance of SingleTon object. Thanks.

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	System.Activator
	System.AppDomain
	System.MarshalByRefObject
	System.Runtime.Remoting.RemotingConfiguration
	System.Runtime.Remoting.RemotingServices

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