Contents
What is session in WCF?
In Windows Communication Foundation (WCF) applications, a session correlates a group of messages into a conversation. WCF sessions are different than the session object available in ASP.NET applications, support different behaviors, and are controlled in different ways.
What is service contract in WCF?
When you create a WCF service, your first task is to define a service contract. The service contract specifies what operations the service supports. An operation can be thought of as a Web service method. You create service contracts by defining a C# or Visual Basic interface.
Is WCF stateless or stateful?
2 Answers. Per-call services are the Windows Communication Foundation default instantiation mode. So, by default, WCF services do not maintain state.
What is contract in Web service?
A Web service contract is essentially a collection of metadata that describes various aspects of an underlying software program, including: the purpose and function of its operations. the messages that need to be exchanged in order to engage the operations. information about how and where the service can be accessed.
How do I specify a service contract in WCF?
A Service Contract basically describes the operations a service exposes to another party (in other words a client). We can map a WCF Service Contract to a Web Service Description Language (WSDL). It’s recommended to apply the ServiceContract attribute to an interface, although it can be applied to a class as well.
How is one instance of WCF created per session?
In per session only one instance of WCF service object is created for a session interaction. Below figure explains the same in a pictorial format. Client creates the proxy of WCF service and makes method calls. One WCF service instance is created which serves the method response. Client makes one more method call in the same session.
How are calls between WCF client objects handled?
All calls between a WCF client object are handled by the same service instance. Different session-based bindings provide additional features. A session-based binding supports the default association of a service instance with a particular session.
What does a session do in Windows Communication Foundation?
In Windows Communication Foundation (WCF) applications, a session correlates a group of messages into a conversation. WCF sessions are different than the session object available in ASP.NET applications, support different behaviors, and are controlled in different ways.
How is a WCF service created and destroyed?
WCF client makes first method call (method call 1). New WCF service instance is created on the server for this method call. WCF service serves the request and sends response and the WCF instance is destroyed and given to garbage collector for clean up.