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#pragma once
#include "counters.h"
#include <library/cpp/monlib/encode/format.h>
#include <library/cpp/monlib/service/pages/pre_mon_page.h>
#include <util/generic/ptr.h>
#include <functional>
namespace NMonitoring {
enum class EUnknownGroupPolicy {
Error, // send 404
Ignore, // send 204
};
struct TDynamicCountersPage: public TPreMonPage {
public:
using TOutputCallback = std::function<void()>;
private:
const TIntrusivePtr<TDynamicCounters> Counters;
TOutputCallback OutputCallback;
EUnknownGroupPolicy UnknownGroupPolicy {EUnknownGroupPolicy::Error};
private:
void HandleAbsentSubgroup(IMonHttpRequest& request);
public:
TDynamicCountersPage(const TString& path,
const TString& title,
TIntrusivePtr<TDynamicCounters> counters,
TOutputCallback outputCallback = nullptr)
: TPreMonPage(path, title)
, Counters(counters)
, OutputCallback(outputCallback)
{
}
void Output(NMonitoring::IMonHttpRequest& request) override;
void BeforePre(NMonitoring::IMonHttpRequest& request) override;
void OutputText(IOutputStream& out, NMonitoring::IMonHttpRequest&) override;
/// If set to Error, responds with 404 if the requested subgroup is not found. This is the default.
/// If set to Ignore, responds with 204 if the requested subgroup is not found
void SetUnknownGroupPolicy(EUnknownGroupPolicy value);
protected:
virtual THolder<ICountableConsumer> CreateEncoder(IOutputStream* out, EFormat format, TStringBuf nameLabel, TCountableBase::EVisibility visibility) const;
};
}
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