ceph/src/jaegertracing/opentelemetry-cpp/third_party/prometheus-cpp/pull/tests/integration/sample_server_multi.cc

   1 #include <chrono>
   2 #include <memory>
   3 #include <thread>
   4
   5 #include "prometheus/client_metric.h"
   6 #include "prometheus/counter.h"
   7 #include "prometheus/exposer.h"
   8 #include "prometheus/family.h"
   9 #include "prometheus/registry.h"
  10
  11 int main() {
  12   using namespace prometheus;
  13
  14   // create an http server running on port 8080
  15   Exposer exposer{"127.0.0.1:8080", 1};
  16
  17   auto registryA = std::make_shared<Registry>();
  18
  19   // add a new counter family to the registry (families combine values with the
  20   // same name, but distinct label dimensions)
  21   auto& counter_familyA = BuildCounter()
  22                               .Name("time_running_seconds_total")
  23                               .Help("How many seconds is this server running?")
  24                               .Register(*registryA);
  25
  26   // add a counter to the metric family
  27   auto& seconds_counterA = counter_familyA.Add(
  28       {{"another_label", "bar"}, {"yet_another_label", "baz"}});
  29
  30   // ask the exposer to scrape registryA on incoming scrapes for "/metricsA"
  31   exposer.RegisterCollectable(registryA, "/metricsA");
  32
  33   auto registryB = std::make_shared<Registry>();
  34
  35   auto& counter_familyB =
  36       BuildCounter()
  37           .Name("other_time_running_seconds_total")
  38           .Help("How many seconds has something else been running?")
  39           .Register(*registryB);
  40
  41   auto& seconds_counterB = counter_familyB.Add(
  42       {{"another_label", "not_bar"}, {"yet_another_label", "not_baz"}});
  43
  44   // This endpoint exposes registryB.
  45   exposer.RegisterCollectable(registryB, "/metricsB");
  46
  47   for (;;) {
  48     std::this_thread::sleep_for(std::chrono::seconds(1));
  49     // increment the counters by one (second)
  50     seconds_counterA.Increment(1.0);
  51     seconds_counterB.Increment(1.5);
  52   }
  53   return 0;
  54 }