zapr

type Config struct {
	Name  string
	Level int

	TimeKey       string
	LevelKey      string
	NameKey       string
	CallerKey     string
	FunctionKey   string
	MessageKey    string
	ErrorKey      string
	StacktraceKey string
	LineEnding    string

	Encoder         encoding.Encoder
	TimeEncoder     encoding.TimeEncoder
	LevelEncoder    encoding.LevelEncoder
	DurationEncoder encoding.DurationEncoder
	CallerEncoder   encoding.CallerEncoder

	EnableStacktrace bool
	EnableCaller     bool
	Development      bool

	SampleInitial    int
	SampleThereafter int

	Metrics Metrics
}

type Logger interface {
	// This is the main logging interface. All methods that return a logr.Logger
	// (e.g. V, WithValues, WithName, WithCallDepth) will return a value implementing
	// zapr.Logger (e.g. with the additional Underlying and Flush methods).
	logr.CallDepthLogger

	// Underlying returns the underlying *zap.Logger with no caller skips.
	// It may return nil if the logger is disabled.
	Underlying() *zap.Logger

	// Flush writes any buffered data to the underlying io.Writer.
	Flush() error
}

type Metrics interface {
	// Init initializes metrics for the named logger when it's created.
	// Logger names are not required to be unique and it may be called
	// with a duplicate name at any time.
	Init(logger string)

	// ObserveEntryLogged observes logged entry metrics for the named logger, at
	// the given level, and with the given bytes.
	ObserveEntryLogged(logger string, level string, bytes int)

	// ObserveEncoderError observes an error encoding an entry for the named logger.
	ObserveEncoderError(logger string)
}