blob: 2c3c358d1c6c5673ec9357a99496176fa752f3bd (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*is % allowed in string
*/
#ifndef GRPC_TEST_CPP_METRICS_SERVER_H
#define GRPC_TEST_CPP_METRICS_SERVER_H
#include <map>
#include <mutex>
#include <grpcpp/server.h>
#include "src/proto/grpc/testing/metrics.grpc.pb.h"
#include "src/proto/grpc/testing/metrics.pb.h"
/*
* This implements a Metrics server defined in
* src/proto/grpc/testing/metrics.proto. Any
* test service can use this to export Metrics (TODO (sreek): Only Gauges for
* now).
*
* Example:
* MetricsServiceImpl metricsImpl;
* ..
* // Create QpsGauge(s). Note: QpsGauges can be created even after calling
* // 'StartServer'.
* QpsGauge qps_gauge1 = metricsImpl.CreateQpsGauge("foo", is_present);
* // qps_gauge1 can now be used anywhere in the program by first making a
* // one-time call qps_gauge1.Reset() and then calling qps_gauge1.Incr()
* // every time to increment a query counter
*
* ...
* // Create the metrics server
* std::unique_ptr<grpc::Server> server = metricsImpl.StartServer(port);
* server->Wait(); // Note: This is blocking.
*/
namespace grpc {
namespace testing {
class QpsGauge {
public:
QpsGauge();
// Initialize the internal timer and reset the query count to 0
void Reset();
// Increment the query count by 1
void Incr();
// Return the current qps (i.e query count divided by the time since this
// QpsGauge object created (or Reset() was called))
long Get();
private:
gpr_timespec start_time_;
long num_queries_;
std::mutex num_queries_mu_;
};
class MetricsServiceImpl final : public MetricsService::Service {
public:
grpc::Status GetAllGauges(ServerContext* context, const EmptyMessage* request,
ServerWriter<GaugeResponse>* writer) override;
grpc::Status GetGauge(ServerContext* context, const GaugeRequest* request,
GaugeResponse* response) override;
// Create a QpsGauge with name 'name'. is_present is set to true if the Gauge
// is already present in the map.
// NOTE: CreateQpsGauge can be called anytime (i.e before or after calling
// StartServer).
std::shared_ptr<QpsGauge> CreateQpsGauge(const TString& name,
bool* already_present);
std::unique_ptr<grpc::Server> StartServer(int port);
private:
std::map<string, std::shared_ptr<QpsGauge>> qps_gauges_;
std::mutex mu_;
};
} // namespace testing
} // namespace grpc
#endif // GRPC_TEST_CPP_METRICS_SERVER_H
|
