cache

Documentation

Overview

Package cache provides a simple in-memory key:value cache

Index

• type Cache
  • func New(defaultExpiration, cleanupInterval time.Duration) *Cache
  • func (s *Cache) Delete(key string)
  • func (s *Cache) Expired() int
  • func (s *Cache) Flush()
  • func (s *Cache) Get(key string) interface{}
  • func (s *Cache) GetWithExpiration(key string) (interface{}, time.Time)
  • func (s *Cache) Has(key string) bool
  • func (s *Cache) Set(key string, data interface{})
  • func (s *Cache) Size() int

Examples

• Cache.Delete
• Cache.Expired
• Cache.Flush
• Cache.Get
• Cache.GetWithExpiration
• Cache.Has
• Cache.Set
• Cache.Size
• New

Types

type Cache

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

Cache is cache instance

func New

func New(defaultExpiration, cleanupInterval time.Duration) *Cache

New creates new cache instance

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

fmt.Println(cache.Get("test"))

Output:

ABCD

func (*Cache) Delete

func (s *Cache) Delete(key string)

Delete removes item from cache

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")
cache.Delete("test")

fmt.Println(cache.Get("test"))

Output:

<nil>

func (*Cache) Expired

func (s *Cache) Expired() int

Expired returns number of exipred items in cache

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

fmt.Println(cache.Expired())

Output:

0

func (*Cache) Flush

func (s *Cache) Flush()

Flush removes all data from cache

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")
cache.Flush()

fmt.Println(cache.Get("test"))

Output:

<nil>

func (*Cache) Get

func (s *Cache) Get(key string) interface{}

Get returns item from cache or nil

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

fmt.Println(cache.Get("test"))

Output:

ABCD

func (*Cache) GetWithExpiration

func (s *Cache) GetWithExpiration(key string) (interface{}, time.Time)

GetWithExpiration returns item from cache and expiration date or nil

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

item, exp := cache.GetWithExpiration("test")

fmt.Println(item, exp.String())

func (*Cache) Has

func (s *Cache) Has(key string) bool

Has returns true if cache contains data for given key

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

fmt.Println(cache.Has("test"))

Output:

true

func (*Cache) Set

func (s *Cache) Set(key string, data interface{})

Set adds or updates item in cache

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

fmt.Println(cache.Get("test"))

Output:

ABCD

func (*Cache) Size

func (s *Cache) Size() int

Size returns number of items in cache

Example

cache := New(time.Second, time.Minute)

cache.Set("test", "ABCD")

fmt.Println(cache.Size())

Output:

1