Merge pull request #1445 from jtattermusch/csharp_new_api

A new C# API based on async/await

1 files changed, 101 insertions, 0 deletions

diff --git a/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs b/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs
new file mode 100644
index 0000000000..e81ce01ebb
--- /dev/null
+++ b/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs
@@ -0,0 +1,101 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Return type for client streaming calls.
+    /// </summary>
+    public struct AsyncClientStreamingCall<TRequest, TResponse>
+    {
+        readonly IClientStreamWriter<TRequest> requestStream;
+        readonly Task<TResponse> result;
+
+        public AsyncClientStreamingCall(IClientStreamWriter<TRequest> requestStream, Task<TResponse> result)
+        {
+            this.requestStream = requestStream;
+            this.result = result;
+        }
+
+        /// <summary>
+        /// Writes a request to RequestStream.
+        /// </summary>
+        public Task Write(TRequest message)
+        {
+            return requestStream.Write(message);
+        }
+
+        /// <summary>
+        /// Closes the RequestStream.
+        /// </summary>
+        public Task Close()
+        {
+            return requestStream.Close();
+        }
+
+        /// <summary>
+        /// Asynchronous call result.
+        /// </summary>
+        public Task<TResponse> Result
+        {
+            get
+            {
+                return this.result;
+            }
+        }
+
+        /// <summary>
+        /// Async stream to send streaming requests.
+        /// </summary>
+        public IClientStreamWriter<TRequest> RequestStream
+        {
+            get
+            {
+                return requestStream;
+            }
+        }
+
+        /// <summary>
+        /// Allows awaiting this object directly.
+        /// </summary>
+        /// <returns></returns>
+        public TaskAwaiter<TResponse> GetAwaiter()
+        {
+            return result.GetAwaiter();
+        }
+    }
+}