Grapevine: Manual Registration of a Singleton

grapevine-register-singleton.md

Create the class that manages the list of APIs as a singleton.

public class ApiKeyManager
{
    private static ApiKeyManager _instance;
    public readonly List<string> ApiKeys = new List<string>();

    private ApiKeyManager() {}

    public static ApiKeyManager GetInstance()
    {
        return _instance ?? (_instance = new ApiKeyManager());
    }

    public IHttpContext AddToList(IHttpContext context)
    {
        ApiKeys.Add(context.Request.PathParameters["value"]);
        context.Response.SendResponse(HttpStatusCode.Ok);
        return context;
    }

    public IHttpContext RemoveFromList(IHttpContext context)
    {
        ApiKeys.Remove(context.Request.PathParameters["value"]);
        context.Response.SendResponse(HttpStatusCode.Ok);
        return context;
    }

    public IHttpContext GetFromList(IHttpContext context)
    {
        var idx = int.Parse(context.Request.PathParameters["index"]);
        var val = ApiKeys.Count > idx ? (string)ApiKeys[idx] : null;
        context.Response.SendResponse(HttpStatusCode.Ok, val);
        return context;
    }
}

Manually register the routes.

server.Router.Register(ApiKeyManager.GetInstance().AddToList, HttpMethod.POST, "/list/[value]");
server.Router.Register(ApiKeyManager.GetInstance().RemoveFromList, HttpMethod.DELETE, "/list/[value]");
server.Router.Register(ApiKeyManager.GetInstance().GetFromList, HttpMethod.GET, "/list/[index]");