/// <summary>
/// DuplexStreaming メソッドを生成します。
/// </summary>
/// <typeparam name="TRequest">リクエストの型</typeparam>
/// <typeparam name="TResponse">レスポンスの型</typeparam>
/// <param name="builderContext">コンテキスト</param>
/// <returns>メソッド</returns>
private DuplexStreamingServerMethod <TRequest, TResponse> CreateDuplexStreamingServerMethod <TRequest, TResponse>(MethodBuildContext builderContext)
where TRequest : class where TResponse : class
{
DuplexStreamingServerMethod <TRequest, TResponse> method = builderContext.MethodImpl.CreateDelegate(typeof(DuplexStreamingServerMethod <TRequest, TResponse>), builderContext.ServiceInstance) as DuplexStreamingServerMethod <TRequest, TResponse>;
GrpcServerPerformanceListener performanceListener = builderContext.NeedNotifyPerformanceLog ? builderContext.Settings.PerformanceListener : null;
return(async delegate(IAsyncStreamReader <TRequest> requestStream, IServerStreamWriter <TResponse> responseStream, ServerCallContext context)
{
try
{
await OnExecutingServiceMethodAsync(context, builderContext.InvokingInterceptors, performanceListener).ConfigureAwait(false);
if (performanceListener != null)
{
performanceListener.NotifyMethodCalling(context);
}
Stopwatch watch = Stopwatch.StartNew();
double elapsd;
try
{
await method(
new RequestStreamReader <TRequest>(requestStream, context, performanceListener)
, new ResponseStreamWriter <TResponse>(responseStream, context, performanceListener)
, context
).ConfigureAwait(false);
}
catch (Exception ex)
{
throw new GrpcServerMethodException(string.Format(Properties.MessageResources.ServerMethodFailed, context.Method) + ex.Message, ex, context);
}
finally
{
elapsd = GrpcPerformanceListener.GetMilliseconds(watch);
if (performanceListener != null)
{
performanceListener.NotifyMethodCalled(context, elapsd);
}
}
await OnExecutedServiceMethodAsync(context, builderContext.InvokedInterceptors, performanceListener).ConfigureAwait(false);
}
catch (Exception ex)
{
Exception wrapped;
if (HandleException(context, builderContext.ExceptionHandlers, performanceListener, ex, out wrapped))
{
GrpcExceptionListener.NotifyCatchServerException(context, wrapped);
throw wrapped;
}
else
{
GrpcExceptionListener.NotifyCatchServerException(context, ex);
throw;
}
}
});
}
/// <summary>
/// サービスメソッド定義を生成します。
/// </summary>
/// <typeparam name="TRequest">リクエストの型</typeparam>
/// <typeparam name="TResponse">レスポンスの型</typeparam>
/// <param name="context">コンテキスト</param>
/// <returns>サービスメソッド定義></returns>
private Method <TRequest, TResponse> CreateServiceMethodFieldGeneric <TRequest, TResponse>(MethodBuildContext context)
{
string serviceName = context.GetServiceName();
string methodName = context.GetServiceMethodName();
GrpcServerPerformanceListener performanceListener = context.NeedNotifyPerformanceLog ? context.Settings.PerformanceListener : null;
Marshaller <TRequest> request = CreateMethodMarshaller <TRequest>(serviceName, methodName, performanceListener, context.Settings);
Marshaller <TResponse> response = CreateMethodMarshaller <TResponse>(serviceName, methodName, performanceListener, context.Settings);
return(new Method <TRequest, TResponse>(context.MethodType, serviceName, methodName, request, response));
}
/// <summary>
/// 例外を処理します。
/// </summary>
/// <param name="context">コンテキスト</param>
/// <param name="exceptionHandlers">例外ハンドラ</param>
/// <param name="performanceListener">パフォーマンスリスナー</param>
/// <param name="original">発生した例外</param>
/// <param name="alternate">代わりにスローする例外</param>
/// <returns>例外がラップされた場合、true を返します。</returns>
private bool HandleException(ServerCallContext context, IEnumerable <IGrpcServerMethodExceptionHandler> exceptionHandlers, GrpcServerPerformanceListener performanceListener, Exception original, out Exception alternate)
{
Exception alt = null;
if (exceptionHandlers != null)
{
foreach (IGrpcServerMethodExceptionHandler handler in exceptionHandlers)
{
if (handler == null)
{
continue;
}
Stopwatch watch = Stopwatch.StartNew();
try
{
if (handler.RelpaceException(context, original, out alt))
{
break;
}
}
catch (Exception ex)
{
throw new GrpcServerMethodException(string.Format(Properties.MessageResources.ServerMethodInterceptorFailed + ex.Message, context.Method, handler.Name), ex, context, handler);
}
finally
{
if (performanceListener != null)
{
performanceListener.NotifyMethodIntercepted(context, handler, GrpcPerformanceListener.GetMilliseconds(watch));
}
}
}
}
if (alt == null)
{
alt = original;
}
RpcException rpc = alt as RpcException;
if (rpc == null)
{
alternate = CreateRpcException(context, alt);
}
else
{
alternate = rpc;
}
return(!object.Equals(original, alternate));
}
/// <summary>
/// サービスメソッドが呼び出されたときの処理を行います。
/// </summary>
/// <param name="context">コンテキスト</param>
/// <param name="interceptors">割込処理</param>
/// <param name="performanceListener">パフォーマンスリスナー</param>
/// <returns></returns>
private async Task OnExecutedServiceMethodAsync(ServerCallContext context, IEnumerable <IGrpcServerMethodInvokedInterceptor> interceptors, GrpcServerPerformanceListener performanceListener)
{
if (interceptors != null)
{
foreach (IGrpcServerMethodInvokedInterceptor interceptor in interceptors)
{
if (interceptor == null)
{
continue;
}
Stopwatch watch = Stopwatch.StartNew();
try
{
await interceptor.OnInvokedAsync(context).ConfigureAwait(false);
}
catch (Exception ex)
{
throw new GrpcServerMethodException(string.Format(Properties.MessageResources.ServerMethodInterceptorFailed + ex.Message, context.Method, interceptor.Name), ex, context, interceptor);
}
finally
{
if (performanceListener != null)
{
performanceListener.NotifyMethodIntercepted(context, interceptor, GrpcPerformanceListener.GetMilliseconds(watch));
}
}
}
}
}
/// <summary>
/// 指定されたメソッドに対するマーシャラーを生成します。
/// </summary>
/// <typeparam name="T">オブジェクトの型</typeparam>
/// <param name="serviceName">サービス名</param>
/// <param name="methodName">メソッド名</param>
/// <param name="performanceListener">パフォーマンスリスナー</param>
/// <param name="settings">動作設定</param>
/// <returns>マーシャラ</returns>
private Marshaller <T> CreateMethodMarshaller <T>(string serviceName, string methodName, GrpcServerPerformanceListener performanceListener, GrpcServiceBuilderSettings settings)
{
Marshaller <T> marshaller = settings.GetMarshallerFactoryOrDefault().GetMarshaller <T>();
if (performanceListener == null)
{
return(marshaller);
}
string typeName = typeof(T).Name;
return(new Marshaller <T>(
delegate(T arg)
{
try
{
Stopwatch watch = Stopwatch.StartNew();
byte[] data = marshaller.Serializer(arg);
performanceListener.NotifySerialized(serviceName, methodName, typeName, GrpcPerformanceListener.GetMilliseconds(watch), data == null ? 0 : data.Length);
return data;
}
catch (Exception ex)
{
GrpcExceptionListener.NotifyCatchSerializerException(serviceName, methodName, typeof(T), ex);
throw new GrpcSerializerException(ex.Message, ex, serviceName, methodName, typeName);
}
}
, delegate(byte[] data)
{
try
{
Stopwatch watch = Stopwatch.StartNew();
T arg = marshaller.Deserializer(data);
performanceListener.NotifyDeserialized(serviceName, methodName, typeName, GrpcPerformanceListener.GetMilliseconds(watch), data == null ? 0 : data.Length);
return arg;
}
catch (Exception ex)
{
GrpcExceptionListener.NotifyCatchSerializerException(serviceName, methodName, typeof(T), ex);
throw new GrpcSerializerException(ex.Message, ex, serviceName, methodName, typeName);
}
}
));
}
