1 /* 2 * 3 * Copyright 2018 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPC_INTERNAL_CPP_EXT_FILTERS_CENSUS_CLIENT_FILTER_H 20 #define GRPC_INTERNAL_CPP_EXT_FILTERS_CENSUS_CLIENT_FILTER_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include "absl/strings/string_view.h" 25 #include "absl/time/time.h" 26 27 #include "src/cpp/ext/filters/census/channel_filter.h" 28 #include "src/cpp/ext/filters/census/open_census_call_tracer.h" 29 30 namespace grpc { 31 32 // A CallData class will be created for every grpc call within a channel. It is 33 // used to store data and methods specific to that call. CensusClientCallData is 34 // thread-compatible, however typically only 1 thread should be interacting with 35 // a call at a time. 36 class CensusClientCallData : public CallData { 37 public: 38 grpc_error_handle Init(grpc_call_element* /* elem */, 39 const grpc_call_element_args* args) override; 40 void StartTransportStreamOpBatch(grpc_call_element* elem, 41 TransportStreamOpBatch* op) override; 42 43 private: 44 OpenCensusCallTracer* tracer_ = nullptr; 45 }; 46 47 } // namespace grpc 48 49 #endif /* GRPC_INTERNAL_CPP_EXT_FILTERS_CENSUS_CLIENT_FILTER_H */ 50