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1 /* Copyright 2016 The TensorFlow Authors. All Rights Reserved.
2 
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6 
7     http://www.apache.org/licenses/LICENSE-2.0
8 
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15 
16 #ifndef TENSORFLOW_CORE_DISTRIBUTED_RUNTIME_RPC_GRPC_WORKER_SERVICE_IMPL_H_
17 #define TENSORFLOW_CORE_DISTRIBUTED_RUNTIME_RPC_GRPC_WORKER_SERVICE_IMPL_H_
18 
19 #include "grpcpp/impl/codegen/async_stream.h"
20 #include "grpcpp/impl/codegen/async_unary_call.h"
21 #include "grpcpp/impl/codegen/proto_utils.h"
22 #include "grpcpp/impl/codegen/rpc_method.h"
23 #include "grpcpp/impl/codegen/service_type.h"
24 #include "grpcpp/impl/codegen/status.h"
25 #include "grpcpp/impl/codegen/stub_options.h"
26 #include "grpcpp/impl/codegen/sync_stream.h"
27 #include "grpcpp/support/byte_buffer.h"
28 
29 #include "tensorflow/core/distributed_runtime/rpc/grpc_util.h"
30 #include "tensorflow/core/distributed_runtime/tensor_coding.h"
31 #include "tensorflow/core/protobuf/worker.pb.h"
32 
33 namespace grpc {
34 
35 // Support parsing/unparsing of tensorflow::TensorResponse.
36 // Wire-format is identical to RecvTensorResponse.
37 // This is specializing an existing template, so it's okay to do this in a
38 // namespace that we don't own.
39 template <>
40 class SerializationTraits<tensorflow::TensorResponse> {
41  public:
Serialize(const tensorflow::TensorResponse & msg,ByteBuffer * bp,bool * own_buffer)42   static Status Serialize(const tensorflow::TensorResponse& msg, ByteBuffer* bp,
43                           bool* own_buffer) {
44     LOG(FATAL) << "TODO(sanjay,jeff): Implement";
45     return Status();
46   }
Deserialize(ByteBuffer * buffer,tensorflow::TensorResponse * msg)47   static Status Deserialize(ByteBuffer* buffer,
48                             tensorflow::TensorResponse* msg) {
49     if (buffer == nullptr) {
50       return Status(StatusCode::INTERNAL, "No payload");
51     }
52     Status result = Status::OK;
53     if (result.ok()) {
54       ::tensorflow::GrpcByteSource source(buffer);
55       auto s = msg->ParseFrom(&source);
56       if (!s.ok()) {
57         result = Status(StatusCode::INTERNAL,
58                         ::tensorflow::strings::StrCat(
59                             "TensorResponse parse error", s.ToString()));
60       }
61     }
62     buffer->Clear();
63     return result;
64   }
65 };
66 
67 }  // namespace grpc
68 
69 namespace tensorflow {
70 
71 // Names of worker methods.
72 enum class GrpcWorkerMethod {
73   kGetStatus,
74   kCreateWorkerSession,
75   kDeleteWorkerSession,
76   kRegisterGraph,
77   kDeregisterGraph,
78   kRunGraph,
79   kCleanupGraph,
80   kCleanupAll,
81   kRecvTensor,
82   kRecvBuf,
83   kLogging,
84   kTracing,
85   kCompleteGroup,
86   kCompleteInstance,
87   kGetStepSequence,
88 };
89 
90 static const int kGrpcNumWorkerMethods =
91     static_cast<int>(GrpcWorkerMethod::kGetStepSequence) + 1;
92 
93 const char* GrpcWorkerMethodName(GrpcWorkerMethod id);
94 
95 namespace grpc {
96 
97 // Implementation of `tensorflow.WorkerService`, based on the
98 // definition in "//tensorflow/core/protobuf/worker_service.proto",
99 // and the gRPC generated stub and service classes.
100 // See the proto file for the definition of methods and messages.
101 class WorkerService final {
102  public:
103   class AsyncService : public ::grpc::Service {
104    public:
105     AsyncService();
106     virtual ~AsyncService();
107 
108     // Make RequestAsyncUnary public for grpc_call.h
109     using ::grpc::Service::RequestAsyncUnary;
110   };
111 };
112 
113 }  // namespace grpc
114 
115 }  // namespace tensorflow
116 
117 #endif  // TENSORFLOW_CORE_DISTRIBUTED_RUNTIME_RPC_GRPC_WORKER_SERVICE_IMPL_H_
118