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