ClickHouse/dbms/programs/server/MetricsTransmitter.h

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#pragma once
#include <condition_variable>
#include <mutex>
#include <string>
#include <thread>
#include <vector>
#include <Common/ProfileEvents.h>
#include <Common/ThreadPool.h>
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namespace DB
{
class AsynchronousMetrics;
class Context;
/** Automatically sends
* - difference of ProfileEvents;
* - values of CurrentMetrics;
* - values of AsynchronousMetrics;
* to Graphite at beginning of every minute.
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*/
class MetricsTransmitter
{
public:
MetricsTransmitter(Context & context_,
const AsynchronousMetrics & async_metrics_,
const std::string & config_name_)
: context(context_)
, async_metrics(async_metrics_)
, config_name(config_name_)
{
}
~MetricsTransmitter();
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private:
void run();
void transmit(std::vector<ProfileEvents::Count> & prev_counters);
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Context & context;
const AsynchronousMetrics & async_metrics;
const std::string config_name;
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bool quit = false;
std::mutex mutex;
std::condition_variable cond;
ThreadFromGlobalPool thread{&MetricsTransmitter::run, this};
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static constexpr auto profile_events_path_prefix = "ClickHouse.ProfileEvents.";
static constexpr auto current_metrics_path_prefix = "ClickHouse.Metrics.";
static constexpr auto asynchronous_metrics_path_prefix = "ClickHouse.AsynchronousMetrics.";
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};
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}