private static object[] GetParametersByName(ServiceMethod serviceMethod, IDictionary args)
{
return(serviceMethod.ServiceInterfaceMethod
.GetParameters()
.Select(p => JsonHelper.ConvertWeaklyTypedValue(args[p.Name], p.ParameterType))
.ToArray());
}
private async Task <string> GetResponse(HttpListenerContext context, ServiceMethod serviceMethod, HttpServiceRequest requestData)
{
var taskType = serviceMethod.ServiceInterfaceMethod.ReturnType;
var resultType = taskType.IsGenericType ? taskType.GetGenericArguments().First() : null;
var arguments = requestData.Target.IsWeaklyTyped ? GetParametersByName(serviceMethod, requestData.Arguments) : requestData.Arguments.Values.Cast <object>().ToArray();
var settings = requestData.Target.IsWeaklyTyped ? JsonSettingsWeak : JsonSettings;
var invocationResult = await Activator.Invoke(serviceMethod, arguments);
string response = JsonConvert.SerializeObject(invocationResult.Result, resultType, settings);
context.Response.Headers.Add(HSHttpHeaders.ExecutionTime, invocationResult.ExecutionTime.ToString());
return(response);
}
public async Task <InvocationResult> Invoke(ServiceMethod serviceMethod, object[] arguments)
{
var invokeTarget = GetInvokeTarget(serviceMethod);
object[] argumentsWithDefaults = GetConvertedAndDefaultArguments(serviceMethod.ServiceInterfaceMethod, arguments);
var sw = Stopwatch.StartNew();
var task = (Task)serviceMethod.ServiceInterfaceMethod.Invoke(invokeTarget, argumentsWithDefaults);
await task.ConfigureAwait(false);
var executionTime = sw.Elapsed;
var result = task.GetType().GetProperty("Result").GetValue(task);
return(new InvocationResult {
Result = result, ExecutionTime = executionTime
});
}
public void TryPublish(HttpServiceRequest requestData, Exception ex, ServiceMethod serviceMethod,
double requestTime)
{
var callEvent = _eventPublisher.CreateEvent();
callEvent.CalledServiceName = serviceMethod?.GrainInterfaceType.Name;
callEvent.ClientMetadata = requestData.TracingData;
callEvent.ServiceMethod = requestData.Target?.MethodName;
var metaData = _serviceEndPointDefinition.GetMetaData(serviceMethod);
var arguments = (requestData.Arguments ?? new OrderedDictionary()).Cast <DictionaryEntry>();
callEvent.Params = arguments.SelectMany(_ => ExtractParamValues(_, metaData)).Select(_ => new Param {
Name = _.name,
Value = _.value,
Sensitivity = _.sensitivity,
});
callEvent.Exception = ex;
callEvent.ActualTotalTime = requestTime;
callEvent.ErrCode = ex != null ? null : (int?)0;
_eventPublisher.TryPublish(callEvent);
}
public EndPointMetadata(ServiceMethod method)
{
Initialize(method);
}
private async Task HandleRequest(HttpListenerContext context)
{
RequestTimings.ClearCurrentTimings();
using (context.Response)
{
var sw = Stopwatch.StartNew();
Exception ex;
// Special endpoints should not be logged/measured/traced like regular endpoints
try
{
foreach (var customEndpoint in CustomEndpoints)
{
if (await customEndpoint.TryHandle(context, (data, status, type) => TryWriteResponse(context, data, status, type)))
{
return;
}
}
}
catch (Exception e)
{
ex = GetRelevantException(e);
await TryWriteResponse(context, ExceptionSerializer.Serialize(ex), GetExceptionStatusCode(ex));
return;
}
// Regular endpoint handling
TracingContext.SetUpStorage();
RequestTimings.GetOrCreate(); // initialize request timing context
Exception actualException = null;
string methodName = null;
// Initialize with empty object for protocol backwards-compatibility.
var requestData = new HttpServiceRequest {
TracingData = new TracingData()
};
ServiceMethod serviceMethod = null;
try
{
try
{
ValidateRequest(context);
await CheckSecureConnection(context);
requestData = await ParseRequest(context);
TracingContext.SetOverrides(requestData.Overrides);
serviceMethod = ServiceEndPointDefinition.Resolve(requestData.Target);
methodName = serviceMethod.ServiceInterfaceMethod.Name;
}
catch (Exception e)
{
actualException = e;
if (e is RequestException)
{
throw;
}
throw new RequestException("Invalid request", e);
}
RejectRequestIfLateOrOverloaded();
var responseJson = await GetResponse(context, serviceMethod, requestData);
await TryWriteResponse(context, responseJson);
}
catch (Exception e)
{
actualException = actualException ?? e;
ex = GetRelevantException(e);
string json = ExceptionSerializer.Serialize(ex);
await TryWriteResponse(context, json, GetExceptionStatusCode(ex));
}
finally
{
sw.Stop();
_serverRequestPublisher.TryPublish(requestData, actualException, serviceMethod, sw.Elapsed.TotalMilliseconds);
}
}
}
public EndPointMetadata GetMetaData(ServiceMethod method)
{
return(_metadata.GetOrAdd(method, m => new EndPointMetadata(m)));
}
protected abstract object GetInvokeTarget(ServiceMethod serviceMethod);