1 #region Copyright notice and license 2 // Copyright 2015 gRPC authors. 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 #endregion 16 17 using System; 18 using System.Threading.Tasks; 19 using Grpc.Core.Internal; 20 21 namespace Grpc.Core.Internal 22 { 23 /// <summary> 24 /// Writes responses asynchronously to an underlying AsyncCallServer object. 25 /// </summary> 26 internal class ServerResponseStream<TRequest, TResponse> : IServerStreamWriter<TResponse>, IHasWriteOptions 27 where TRequest : class 28 where TResponse : class 29 { 30 readonly AsyncCallServer<TRequest, TResponse> call; 31 WriteOptions writeOptions; 32 ServerResponseStream(AsyncCallServer<TRequest, TResponse> call)33 public ServerResponseStream(AsyncCallServer<TRequest, TResponse> call) 34 { 35 this.call = call; 36 } 37 WriteAsync(TResponse message)38 public Task WriteAsync(TResponse message) 39 { 40 return call.SendMessageAsync(message, GetWriteFlags()); 41 } 42 WriteResponseHeadersAsync(Metadata responseHeaders)43 public Task WriteResponseHeadersAsync(Metadata responseHeaders) 44 { 45 return call.SendInitialMetadataAsync(responseHeaders); 46 } 47 48 public WriteOptions WriteOptions 49 { 50 get 51 { 52 return writeOptions; 53 } 54 55 set 56 { 57 writeOptions = value; 58 } 59 } 60 GetWriteFlags()61 private WriteFlags GetWriteFlags() 62 { 63 var options = writeOptions; 64 return options != null ? options.Flags : default(WriteFlags); 65 } 66 } 67 } 68