Question

I’m trying to extract the token verification to a seperate method and after that the code block in the else statement I would likewise want to make generic.

public void Subscribe(string s1, string s2, string s3)
    {
        if (token == null || token.IsExpired)
        {                
            RestClient client = CreateRestClient();
            RestRequest treq = CreateTokenRequest();                

            client.ExecuteAsync(treq, (response) =>
            {
                CreateNewToken(response.Content);
                SubscribeToNotifications(s1, s2, s3);
            });
        }
        else
        {
            var c = new RestClient(ServiceAddress);
            var r = new RestRequest("Subscribe?");
            r.AddParameter("P1", s1);
            r.AddParameter("P2", s2);
            r.AddParameter("P3", s3);
            r.AddHeader("Authorization", token.TokenString);
            c.ExecuteAsync(r, (response) =>
            {
                if (response.StatusCode == HttpStatusCode.OK)
                    SubcribeCompleted(this, new GeneralEventArgs(true, string.Empty));
                else if (response.StatusCode == HttpStatusCode.Unauthorized)
                    SubcribeCompleted(this, new GeneralEventArgs(false, "Unauthorized!"));
                else
                    SubcribeCompleted(this, new GeneralEventArgs(false, "Error"));
            });
        }
    }

The problem is how do I specify which method to call in the callback handler?
I have tried with Func<> but the other methods where I would use the generic token method do not necessarily has the same signature.

Thanks in advance for any input 🙂

Answer 1

Action<RestResponse> is the type of RestClient.ExecuteAsync.

Func<> is used when there is a return value, since there is none, Action<> is used.