package fstree

import "time"

type Metrics interface {
	SetMode(readOnly bool)
	Close()

	Iterate(d time.Duration, success bool)
	Delete(d time.Duration, success bool)
	Exists(d time.Duration, success bool)
	Put(d time.Duration, size int, success bool)
	Get(d time.Duration, size int, success bool)
	GetRange(d time.Duration, size int, success bool)
}

type noopMetrics struct{}

func (m *noopMetrics) SetMode(bool)                      {}
func (m *noopMetrics) Close()                            {}
func (m *noopMetrics) Iterate(time.Duration, bool)       {}
func (m *noopMetrics) Delete(time.Duration, bool)        {}
func (m *noopMetrics) Exists(time.Duration, bool)        {}
func (m *noopMetrics) Put(time.Duration, int, bool)      {}
func (m *noopMetrics) Get(time.Duration, int, bool)      {}
func (m *noopMetrics) GetRange(time.Duration, int, bool) {}