/// <summary> /// Asynchronously submits a <see cref="SharedMemMessage"/> request message to the server /// and waits for and returns the response <see cref="SharedMemMessage"/>. /// </summary> /// <param name="request">The request message.</param> /// <param name="timeout">The optional timeout to override the <see cref="Timeout"/> property. /// </param> /// <returns>The response <see cref="SharedMemMessage"/>.</returns> public Task <SharedMemMessage> CallAsync(SharedMemMessage request, TimeSpan?timeout = null) { if (request == null) { throw new ArgumentNullException("request"); } if (request.InternalRequestId != Guid.Empty) { throw new InvalidOperationException("Cannot reuse a [SharedMemMessage] request instance previously submitted for a call operation."); } request.InternalRequestId = Guid.NewGuid(); request.InternalClientInbox = this.ClientName; if (!timeout.HasValue) { timeout = this.Timeout; } var operation = new PendingOperation(request, new TaskCompletionSource <SharedMemMessage>(), stopwatch.Elapsed + timeout.Value); lock (syncLock) { pendingOperations.Add(request.InternalRequestId, operation); } try { using (var output = new EnhancedMemoryStream(request.SerializedCapacityHint)) { output.WriteInt32(request.TypeCode); request.InternalWriteTo(output); request.WriteTo(output); // This call is synchronous but should execute very quickly (microseconds). outbox.Send(ServerName, output.ToArray()); } } catch (Exception e) { lock (syncLock) { pendingOperations.Remove(operation.RequestMessage.InternalRequestId); } operation.Tcs.TrySetException(e); } return(operation.Tcs.Task); }
/// <summary> /// Asynchronously submits a <see cref="SharedMemMessage"/> request message to the server /// and waits for and returns a response of type <typeparamref name="TResponse"/>. /// </summary> /// <typeparam name="TResponse">The response message type.</typeparam> /// <param name="request">The request message.</param> /// <param name="timeout">The optional timeout to override the <see cref="Timeout"/> property. /// </param> /// <returns>The response <see cref="SharedMemMessage"/>.</returns> public async Task <TResponse> CallAsync <TResponse>(SharedMemMessage request, TimeSpan?timeout = null) where TResponse : SharedMemMessage, new() { return((TResponse)(await CallAsync(request, timeout))); }
/// <summary> /// Constructor. /// </summary> /// <param name="request">The operation's request message.</param> /// <param name="tcs">The <see cref="TaskCompletionSource{SharedMemMessage}"/> to be used to complete the operation.</param> /// <param name="ttd"> /// The elapsed time as compared to the client's stopwatch when the /// operation should be terminated with a timeout (time-to-die). /// </param> public PendingOperation(SharedMemMessage request, TaskCompletionSource <SharedMemMessage> tcs, TimeSpan ttd) { this.RequestMessage = request; this.Tcs = tcs; this.TTD = ttd; }