Remoting.Net 

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Remote Objects activation 

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By Nishant Kumar

 The behavior of remoting object is determined by the ways object is created and activated. There are two ways of activation for .NET remote objects.

Server Activation

In server activation, the object is created on the server when method call arrives from client to server process. But the object doesn't get created when you use new keyword to create instance of the server class.

You can specify server activated objects to acts either as singleton or Single Call objects.

SingleCall: If an object is declared as SingleCall object, the remoting system creates an object each time a client method invokes a remote object. SingleCall objects are useful when limited work expected from the objects. These objects cannot hold state information between method calls.

Singleton Objects: A single instance of the server class manages the entire client. These objects serve multiple clients with one instance. This mode allows maintaining object's state which can be useful when data needs to be shared explicitly between clients.

Client-Activated Objects: The client-activated object is created on the server when an instance of the server class is created using new keyword. When you create instance of server object, a connection is made to the server and the client proxy is created. These objects can maintain state information between method calls for the client.

Life Time of Remote Object.

A lease is created for every object that can be transported across domain. The lease controls the lifetime of the object. The remoting object serves client until its lease expires. When the lease expires, the object is disconnected from the client and available to get destroyed by garbage collection.

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