logger_base.hpp

#pragma once
 
#include <atomic>
 
#include <userver/logging/format.hpp>
#include <userver/logging/level.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace logging::impl {
 
class TagWriter;
 
/// Base logger class
class LoggerBase {
 public:
  LoggerBase() = delete;
  LoggerBase(const LoggerBase&) = delete;
  LoggerBase(LoggerBase&&) = delete;
  LoggerBase& operator=(const LoggerBase&) = delete;
  LoggerBase& operator=(LoggerBase&&) = delete;
 
  explicit LoggerBase(Format format) noexcept;
 
  virtual ~LoggerBase();
 
  virtual void Log(Level level, std::string_view msg) = 0;
 
  virtual void Flush();
 
  virtual void PrependCommonTags(TagWriter writer) const;
 
  Format GetFormat() const noexcept;
 
  virtual void SetLevel(Level level);
  Level GetLevel() const noexcept;
  virtual bool ShouldLog(Level level) const noexcept;
 
  void SetFlushOn(Level level);
  bool ShouldFlush(Level level) const;
 
 private:
  const Format format_;
  std::atomic<Level> level_{Level::kNone};
  std::atomic<Level> flush_level_{Level::kWarning};
};
 
bool ShouldLogNoSpan(const LoggerBase& logger, Level level) noexcept;
 
}  // namespace logging::impl
 
USERVER_NAMESPACE_END