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-rw-r--r--src/csharp/Grpc.Core/Internal/ClientResponseStream.cs29
1 files changed, 27 insertions, 2 deletions
diff --git a/src/csharp/Grpc.Core/Internal/ClientResponseStream.cs b/src/csharp/Grpc.Core/Internal/ClientResponseStream.cs
index b2378cade6..6c44521038 100644
--- a/src/csharp/Grpc.Core/Internal/ClientResponseStream.cs
+++ b/src/csharp/Grpc.Core/Internal/ClientResponseStream.cs
@@ -33,6 +33,7 @@
using System;
using System.Collections.Generic;
+using System.Threading;
using System.Threading.Tasks;
namespace Grpc.Core.Internal
@@ -42,17 +43,41 @@ namespace Grpc.Core.Internal
where TResponse : class
{
readonly AsyncCall<TRequest, TResponse> call;
+ TResponse current;
public ClientResponseStream(AsyncCall<TRequest, TResponse> call)
{
this.call = call;
}
- public Task<TResponse> ReadNext()
+ public TResponse Current
{
+ get
+ {
+ if (current == null)
+ {
+ throw new InvalidOperationException("No current element is available.");
+ }
+ return current;
+ }
+ }
+
+ public async Task<bool> MoveNext(CancellationToken token)
+ {
+ if (token != CancellationToken.None)
+ {
+ throw new InvalidOperationException("Cancellation of individual reads is not supported.");
+ }
var taskSource = new AsyncCompletionTaskSource<TResponse>();
call.StartReadMessage(taskSource.CompletionDelegate);
- return taskSource.Task;
+ var result = await taskSource.Task;
+ this.current = result;
+ return result != null;
+ }
+
+ public void Dispose()
+ {
+ // TODO(jtattermusch): implement the semantics of stream disposal.
}
}
}