cache

Documentation

Index

• func Hash(what []byte) uint64
• type Cache
  • func New(size int) *Cache
  • func (c *Cache) Add(key string, el interface{}) error
  • func (c *Cache) Get(key string) (interface{}, bool)
  • func (c *Cache) Len() int
  • func (c *Cache) Remove(key string)
  • func (c *Cache) SetEvict(e EvictFn)
  • func (c *Cache) UpdateAdd(key string, update func(*interface{}) interface{}, add func() interface{}) interface{}
• type EvictFn

Functions

func Hash

func Hash(what []byte) uint64

Hash returns the FNV hash of what.

Types

type Cache

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

Cache is cache with a customizable eviction policy.

func New

func New(size int) *Cache

New returns a new cache.

func (*Cache) Add

func (c *Cache) Add(key string, el interface{}) error

Add adds a new element to the cache. If the element already exists it is overwritten.

func (*Cache) Get

func (c *Cache) Get(key string) (interface{}, bool)

Get looks up element index under key.

func (*Cache) Len

func (c *Cache) Len() int

Len returns an estimate number of elements in the cache. This is an estimate, because each shard is locked one at a time, and items can be added/removed from other shards as each shard is counted.

func (*Cache) Remove

func (c *Cache) Remove(key string)

Remove removes the element indexed with key.

func (*Cache) SetEvict

func (c *Cache) SetEvict(e EvictFn)

func (*Cache) UpdateAdd

func (c *Cache) UpdateAdd(key string, update func(*interface{}) interface{}, add func() interface{}) interface{}

type EvictFn

type EvictFn func(*interface{}) bool