lru

Documentation

Index

• type Cache
  • func New(op string, maxEntries int64, duration time.Duration, ...) *Cache
  • func (c *Cache) FindOrFetch(cacheNamespace, key string, fetchFn func() (interface{}, error)) (interface{}, error)

Types

type Cache

type Cache struct {
	// contains filtered or unexported fields
}

Cache wraps a ccache and allows setting custom metrics for hits/misses.

func New

func New(op string, maxEntries int64, duration time.Duration, cachedEntriesMetric *prometheus.GaugeVec, cacheRequestsMetric *prometheus.CounterVec) *Cache

New creates an LRU cache

func (*Cache) FindOrFetch

func (c *Cache) FindOrFetch(cacheNamespace, key string, fetchFn func() (interface{}, error)) (interface{}, error)

FindOrFetch will try to get the item from the cache if exists and is not expired. If it can't find it, it will call fetchFn to retrieve the item and cache it.