public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
//if the polling interval is zero (or less) run this request synchronously
if (this._pollingIntervalMilliseconds <= 0)
{
return(this.ServiceBusClient.TryInvokeMember(binder, args, out result));
}
result = null;
var info = binder.CallInfo;
var method = binder.Name;
// accepting named args only... SKEET!
if (info.ArgumentNames.Count != args.Length)
{
throw new InvalidOperationException("Please use named arguments.");
}
//stuff parameters into case insensitive dictionary
var parameters = new Dictionary <string, object>(StringComparer.OrdinalIgnoreCase);
for (int i = 0; i < args.Length; i++)
{
parameters.Add(info.ArgumentNames[i], args[i]);
}
var token = ServiceBusClient.AsyncProcess().ExecuteAsyncProcess(method, parameters);
//the only way to determine if generic type parameters have been used is reflection
var csharpBinder = binder.GetType().GetInterface("Microsoft.CSharp.RuntimeBinder.ICSharpInvokeOrInvokeMemberBinder");
var typeArgs = csharpBinder.GetProperty("TypeArguments").GetValue(binder, null) as IList <Type>;
Type returnType = typeArgs.FirstOrDefault();
//if it exists, the first generic type parameter is our return type (e.g. myObject.MyMethod<int>(Id: 123); --> returnType would be typeof(int))
if (returnType != null)
{
MethodInfo genericMethodInfo = _asyncDynamicMethodInfo.MakeGenericMethod(returnType);
try
{
var sw = Stopwatch.StartNew();
while (sw.ElapsedMilliseconds <= PollingTimeout.Value.TotalMilliseconds)
{
//async get result
var asyncResult = genericMethodInfo.Invoke(ServiceBusClient.AsyncProcess(), new object[] { (string)token });
//examine result
PropertyInfo statusPropertyInfo = asyncResult.GetType().GetProperty("Status");
Status asyncStatus = (Status)statusPropertyInfo.GetValue(asyncResult);
if (asyncStatus == Status.Done)
{
PropertyInfo resultPropertyInfo = asyncResult.GetType().GetProperty("Result");
result = resultPropertyInfo.GetValue(asyncResult);
return(true);
}
else if (asyncStatus == Status.NotFound)
{
//todo create a custom exception
throw new AsyncNotFoundException();
}
//wait our polling interval
Thread.Sleep(_pollingIntervalMilliseconds);
}//end while (not timed out)
//if we've made it here... timed out
throw new AsyncTimeoutException();
}
catch (TargetInvocationException tiex)
{
throw tiex.InnerException;
}
}
else
{
var sw = Stopwatch.StartNew();
while (sw.ElapsedMilliseconds <= PollingTimeout.Value.TotalMilliseconds)
{
//async get result
AsyncResult asyncResult = ServiceBusClient.AsyncProcess().GetAsyncResult((string)token) as AsyncResult;
//examine result
if (asyncResult.Status == Status.Done)
{
result = asyncResult.Result;
return(true);
}
else if (asyncResult.Status == Status.NotFound)
{
//todo create a custom exception
throw new AsyncNotFoundException();
}
//wait our polling interval
Thread.Sleep(_pollingIntervalMilliseconds);
}//end while (not timed out)
//if we've made it here... timed out
throw new AsyncTimeoutException();
}
}
