Initiating session issue

Question

Let's consider this chat service:(the entire application may be found here)

[ServiceContract(SessionMode = SessionMode.Required, CallbackContract = typeof(IChatCallback))]
interface IChat
{
    [OperationContract(IsOneWay = false, IsInitiating = true, IsTerminating = false)]
    string[] Join(string name);

    [OperationContract(IsOneWay = true, IsInitiating = false, IsTerminating = false)]
    void Say(string msg);

    [OperationContract(IsOneWay = true, IsInitiating = false, IsTerminating = false)]
    void Whisper(string to, string msg);

    [OperationContract(IsOneWay = true, IsInitiating = false, IsTerminating = true)]
    void Leave();
}

The Join method initiates a session and the Leave method ends it. Let's say i want to authenticate my users, create a service IAuth let's say with 2 methods Login and Logout. How should i initiate and terminate the session(because from what i've read this application requires a session) in this case, having different services? PS: i am new to wcf so any piece of advice helps. Thanks

Answer 1

You don't need to initiate or terminate session (although technically it is possible) by yourself. WCF will do that for you. It will initiate sessions once Join will be called and will terminate session once Leave will be called.