/// <summary>
/// The method executed server side
/// </summary>
/// <param name="request"></param>
public virtual void ExecuteRemoteAsync(AsyncExecutionRequest request) // this should be executing server side after encryption has been handled
{
Task.Run(() =>
{
AsyncCallbackService asyncCallback = _proxyFactory.GetProxy <AsyncCallbackService>(request.RespondToHostName, request.RespondToPort, Logger);
// This executes server side after the SecureChannel has decrypted and validated, need to set IsInitialized to true to
// ensure the request doesn't reinitialize to a state where it believes it is an execution request
// targeting SecureChannel since that is what is in the HttpContext.Request.Url
ExecutionRequest execRequest = new ExecutionRequest
{
ClassName = request.ClassName,
MethodName = request.MethodName,
Ext = "json",
ServiceProvider = ServiceProvider,
JsonParams = request.JsonParams,
IsInitialized = true,
Context = HttpContext
};
bool success = execRequest.Execute();
AsyncExecutionResponse response = new AsyncExecutionResponse
{
Success = success,
Request = request,
Result = execRequest.Result
};
asyncCallback.RecieveAsyncExecutionResponse(response);
});
}
public virtual void RecieveAsyncExecutionResponse(AsyncExecutionResponse response) // called by the server side to send responses
{
Args.ThrowIfNull(response, "result");
Args.ThrowIfNull(response.Request, "result.Request");
string cuid = response.Request.Cuid;
Action <AsyncExecutionResponse> action = ((r) => { });
if (_pendingRequests.ContainsKey(cuid))
{
if (!_pendingRequests.TryRemove(cuid, out action))
{
FireEvent(RemovePendingFailed, new AsyncExecutionResponseEventArgs {
Response = response
});
}
}
else
{
Logger.Warning("Received AsyncExecutionResponse with no corresponding request: {0}", response.PropertiesToString());
}
Task.Run(() =>
{
SaveResponseData(response);
action(response);
});
}
/// <summary>
/// The method executed server side
/// </summary>
/// <param name="request"></param>
public virtual void ExecuteRemoteAsync(AsyncExecutionRequest request) // this should be executing server side after encryption has been handled
{
Task.Run(() =>
{
AsyncCallbackService asyncCallback = _proxyFactory.GetProxy <AsyncCallbackService>(request.RespondToHostName, request.RespondToPort);
ExecutionRequest execRequest = new ExecutionRequest(request.ClassName, request.MethodName, "json")
{
ServiceProvider = ServiceProvider,
Context = HttpContext,
JsonParams = request.JsonParams
};
bool success = execRequest.Execute();
AsyncExecutionResponse response = new AsyncExecutionResponse
{
Success = success,
Request = request,
Result = execRequest.Result
};
if (!success)
{
if (execRequest?.Result is ValidationResult validation && validation.Success == false)
{
response.ValidationFailure = new ValidationFailure {
Message = validation.Message, Failures = validation.ValidationFailures
};
response.Result = null;
}
}
asyncCallback.RecieveAsyncExecutionResponse(response);
});
}
public void InvokeAsync(AsyncExecutionRequest request, Action <AsyncExecutionResponse> responseHandler = null)
{
responseHandler = responseHandler ?? DefaultResponseHandler;
if (!request.UseCachedResponse)
{
CallExecuteRemoteAsync(request, responseHandler);
}
else
{
AsyncExecutionResponseData response = CallbackService.GetCachedResponse(request.GetRequestHash());
if (response != null && new Instant(DateTime.UtcNow).DiffInMinutes(response.Created.Value) <= request.ResponseMaxAgeInMinutes)
{
AsyncExecutionResponse result = response.CopyAs <AsyncExecutionResponse>();
result.Success = true;
result.Request = request;
result.ResultJson = response.ResultJson;
responseHandler(result);
}
else
{
if (response != null)
{
CallbackService.AsyncCallbackRepository.Delete(response);
}
CallExecuteRemoteAsync(request, responseHandler);
}
}
}
private void SaveResponseData(AsyncExecutionResponse response, int retryCount = 5)
{
Args.ThrowIfNull(response, "response");
Args.ThrowIfNull(response.Request, "response.Request");
response.ResultJson = response.Result?.ToJson() ?? "";
string responseHash = response.ResultJson.Sha256();
AsyncExecutionData executionData = AsyncCallbackRepository.OneAsyncExecutionDataWhere(c => c.RequestCuid == response.Request.Cuid);
if (executionData == null)
{
Logger.Warning("Recieved response without corresponding ASYNCEXECUTIONDATA entry: \r\n{0}", response.PropertiesToString());
}
else
{
executionData.ResponseCuid = response.Cuid;
executionData.Responded = new Instant(DateTime.UtcNow);
executionData.ResponseHash = responseHash;
executionData.Success = true;
AsyncCallbackRepository.Save(executionData);
}
AsyncExecutionRequestData requestData = AsyncCallbackRepository.OneAsyncExecutionRequestDataWhere(c => c.Cuid == response.Request.Cuid);
if (requestData == null)
{
Thread.Sleep(100);
if (retryCount > 0)
{
Logger.Warning("Received response without corresponding ASYNCEXECUTIONREQUESTDATA entry (retry count={0}): \r\n{1}", retryCount, response.PropertiesToString());
SaveResponseData(response, --retryCount);
}
return;
}
AsyncExecutionResponseData responseData = AsyncCallbackRepository.OneAsyncExecutionResponseDataWhere(c => c.Cuid == response.Cuid);
if (responseData != null)
{
Logger.Warning("Received response that has already been recorded: {0}", response.PropertiesToString());
}
else
{
responseData = new AsyncExecutionResponseData
{
RequestId = requestData.Id,
ResultJson = response.ResultJson,
ResponseHash = responseHash,
RequestHash = requestData.RequestHash
};
AsyncCallbackRepository.Save(responseData);
}
}
public Task <AsyncExecutionResponse> InvokeAsync(string methodName, params object[] arguments)
{
return(Task.Run(() =>
{
AutoResetEvent blocker = new AutoResetEvent(false);
AsyncExecutionResponse result = null;
InvokeAsync((r) =>
{
result = r;
blocker.Set();
}, methodName, arguments);
blocker.WaitOne(AsyncWaitTimeout);
return result;
}));
}
