Demo showing how to log Jayrock JSON-RPC service method errors in ELMAH

Demo.linq

<Query Kind="Program">
  <Reference>&lt;RuntimeDirectory&gt;\System.Web.dll</Reference>
  <NuGetReference>elmah</NuGetReference>
  <NuGetReference>jayrock</NuGetReference>
  <Namespace>Elmah</Namespace>
  <Namespace>Jayrock</Namespace>
  <Namespace>Jayrock.Json</Namespace>
  <Namespace>Jayrock.Json.Conversion</Namespace>
  <Namespace>Jayrock.JsonRpc</Namespace>
  <Namespace>Jayrock.Services</Namespace>
</Query>

void Main()
{
    // During initialization, you register your dispatcher subclass 
    // like below and Jayrock will use it instead. In ASP.NET, this 
    // would, e.g., be done during the Application_Start event in 
    // Global.asax.

    JsonRpcDispatcherFactory.Current = svc => new MyJsonRpcDispatcher(svc);
    
    var service = new MySerivce();
    var dispatcher = JsonRpcDispatcherFactory.CreateDispatcher(service);
    // Call the foo method that throws...
    var response = dispatcher.Process("{ id: 1, method: foo }");
    Console.WriteLine(response);
    
    // See what ELMAH logged...
    
    var errors = new ArrayList();
    ErrorLog.GetDefault(null).GetErrors(0, 10, errors);
    errors.Dump();
}

class MySerivce : JsonRpcService
{
    [JsonRpcMethod]
    public void Foo() { throw new NotImplementedException(); }
}

class MyJsonRpcDispatcher : JsonRpcDispatcher
{
    public MyJsonRpcDispatcher(IService service) :
        base(service) {}
        
    protected override object OnError(Exception e, IDictionary request)
    {
        // In ASP.NET better to signal the error like this:
        // ErrorSignal.FromCurrentContext().Raise(e, HttpContext.Current)
        // but here we log directly...
        ErrorLog.GetDefault(null).Log(new Error(e));
        return base.OnError(e, request);
    }
}