limiter.hpp

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#pragma once
 
/// @file userver/congestion_control/limiter.hpp
/// @brief @copybrief congestion_control::Limiter
 
#include <optional>
#include <string>
 
USERVER_NAMESPACE_BEGIN
 
namespace congestion_control {
 
struct Limit {
    std::optional<std::size_t> load_limit;
    std::size_t current_load{0};
 
    std::string ToLogString() const {
        return "limit=" + (load_limit ? std::to_string(*load_limit) : std::string("(none)"));
    }
};
 
/// @brief Applies congestion control load limits
class Limiter {
public:
    virtual void SetLimit(const Limit& new_limit) = 0;
 
protected:
    ~Limiter() = default;
};
 
}  // namespace congestion_control
 
USERVER_NAMESPACE_END