GRPC Stream implementation of HeliumStream

blimp/net/grpc_client_stream.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BLIMP_NET_GRPC_CLIENT_STREAM_H_
+#define BLIMP_NET_GRPC_CLIENT_STREAM_H_
+
+#include <grpc++/security/server_credentials.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include <grpc++/server_context.h>
+#include <grpc/grpc.h>

[Garrett Casto, 2016/11/11 00:15:53]

Nit: We may want to have a discussion on how we reference grpc code from
Chromium. In general Chrome prefers using absolute paths for includes, but there
is certainly a case to be made to use relative includes here. 

+
+#include <memory>
+
+#include "base/callback.h"
+#include "base/threading/thread_checker.h"
+
+#include "blimp/common/assignment_options.h"
+#include "blimp/common/logging.h"
+#include "blimp/common/proto/helium_service.grpc.pb.h"
+#include "blimp/net/blimp_net_export.h"
+#include "blimp/net/grpc_stream.h"
+
+#include "net/base/completion_callback.h"
+
+namespace grpc {
+class Channel;
+class ServerCompletionQueue;
+}  // namespace grpc
+
+namespace blimp {
+
+// A |HeliumStream| that implements the gRPC bidirectional streaming API for the

[Garrett Casto, 2016/11/11 00:15:53]

Nit: Generally speaking pipes are for variable names. I wouldn't expect pipes
around a class name or function name.

+// client.
+class BLIMP_NET_EXPORT GrpcClientStream : public GrpcStream {
+ public:
+  GrpcClientStream(const AssignmentOptions& assignment_options,
+                   const net::CompletionCallback& connection_callback);
+  void SendMessage(std::unique_ptr<HeliumWrapper> helium_message,
+                   const Stream::SendMessageCallback& callback) override;
+  void ReceiveMessage(
+      const Stream::ReceiveMessageCallback& on_receive_cb) override;
+  ~GrpcClientStream() override;
+
+ protected:
+  AssignmentOptions assignment_options_;
+
+  // Data that is shared between the IO thread and the completion queue thread
+  // specific to the client stream. See |GrpcStream::SharedData| and
+  // |GrpcClientStream::SharedData| for more details.
+  struct ClientSharedData;
+  scoped_refptr<ClientSharedData> shared_data_;
+  base::ThreadChecker thread_checker_;
+};
+
+}  // namespace blimp
+
+#endif  // BLIMP_NET_GRPC_CLIENT_STREAM_H_