1 //
2 //
3 // Copyright 2015 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 // is % allowed in string
17 //
18
19 #include <memory>
20 #include <string>
21
22 #include "absl/flags/flag.h"
23
24 #include <grpc/support/log.h>
25 #include <grpcpp/grpcpp.h>
26
27 #include "src/core/lib/gprpp/crash.h"
28 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
29 #include "src/proto/grpc/testing/metrics.pb.h"
30 #include "test/cpp/util/metrics_server.h"
31 #include "test/cpp/util/test_config.h"
32
33 int kDeadlineSecs = 10;
34
35 ABSL_FLAG(std::string, metrics_server_address, "localhost:8081",
36 "The metrics server addresses in the fomrat <hostname>:<port>");
37 // TODO(Capstan): Consider using absl::Duration
38 ABSL_FLAG(int32_t, deadline_secs, kDeadlineSecs,
39 "The deadline (in seconds) for RCP call");
40 ABSL_FLAG(bool, total_only, false,
41 "If true, this prints only the total value of all gauges");
42
43 using grpc::testing::EmptyMessage;
44 using grpc::testing::GaugeResponse;
45 using grpc::testing::MetricsService;
46
47 // Do not log anything
BlackholeLogger(gpr_log_func_args *)48 void BlackholeLogger(gpr_log_func_args* /*args*/) {}
49
50 // Prints the values of all Gauges (unless total_only is set to 'true' in which
51 // case this only prints the sum of all gauge values).
PrintMetrics(std::unique_ptr<MetricsService::Stub> stub,bool total_only,int deadline_secs)52 bool PrintMetrics(std::unique_ptr<MetricsService::Stub> stub, bool total_only,
53 int deadline_secs) {
54 grpc::ClientContext context;
55 EmptyMessage message;
56
57 std::chrono::system_clock::time_point deadline =
58 std::chrono::system_clock::now() + std::chrono::seconds(deadline_secs);
59
60 context.set_deadline(deadline);
61
62 std::unique_ptr<grpc::ClientReader<GaugeResponse>> reader(
63 stub->GetAllGauges(&context, message));
64
65 GaugeResponse gauge_response;
66 long overall_qps = 0;
67 while (reader->Read(&gauge_response)) {
68 if (gauge_response.value_case() == GaugeResponse::kLongValue) {
69 if (!total_only) {
70 std::cout << gauge_response.name() << ": "
71 << gauge_response.long_value() << std::endl;
72 }
73 overall_qps += gauge_response.long_value();
74 } else {
75 std::cout << "Gauge '" << gauge_response.name() << "' is not long valued"
76 << std::endl;
77 }
78 }
79
80 std::cout << overall_qps << std::endl;
81
82 const grpc::Status status = reader->Finish();
83 if (!status.ok()) {
84 std::cout << "Error in getting metrics from the client" << std::endl;
85 }
86
87 return status.ok();
88 }
89
main(int argc,char ** argv)90 int main(int argc, char** argv) {
91 grpc::testing::InitTest(&argc, &argv, true);
92
93 // The output of metrics client is in some cases programmatically parsed (for
94 // example by the stress test framework). So, we do not want any of the log
95 // from the grpc library appearing on stdout.
96 gpr_set_log_function(BlackholeLogger);
97
98 std::shared_ptr<grpc::Channel> channel(
99 grpc::CreateChannel(absl::GetFlag(FLAGS_metrics_server_address),
100 grpc::InsecureChannelCredentials()));
101
102 if (!PrintMetrics(MetricsService::NewStub(channel),
103 absl::GetFlag(FLAGS_total_only),
104 absl::GetFlag(FLAGS_deadline_secs))) {
105 return 1;
106 }
107
108 return 0;
109 }
110