func main() {
// creates a cache that can hold 10 values
cache, _ := multicache.NewDefaultMulticache(10)
// Nothing yet in cache
value, ok := cache.Get("foo")
fmt.Printf("%v %v\n", value, ok) // <nil> false
// Add a key value pair
cache.Add("foo", 42)
value, ok = cache.Get("foo")
fmt.Printf("%v %v\n", value, ok) // 42 true
// Add a multiple key-value pair, note that the value goes first.
cache.AddMany(44.009, "bar", "baz")
value, ok = cache.Get("bar")
fmt.Printf("%v %v\n", value, ok) // 44.009 true
// Delete one key and all of the "multikeys" get removed
cache.Remove("baz")
value, ok = cache.Get("bar")
fmt.Printf("%v %v\n", value, ok) // <nil> false
// Create a multicache with your desired replacement algorithm
// (you can even make your own)
multicache.NewMulticache(10, &multicache.SecondChance{})
// We even have time expiring caches, items expire after the given number
// of ms. (10 items, 1000ms)
multicache.CreateTimeExpireMulticache(10, 1000)
}
func main() {
// creates a cache that can hold 10 values
cache, _ := multicache.NewDefaultMulticache(10)
// session id and it's user
cache.Add("1", "trillian")
cache.Add("2", "zaphod")
cache.Add("3", "trillian")
cache.Add("4", "trillian")
cache.Add("5", "ford_prefect")
// Removes many items from the cache using a specified function that looks
// at each item.
// For example, if a user wants to log out of all sessions
cache.RemoveManyFunc(func(item interface{}) bool {
val, ok := item.(string)
if !ok {
return false
}
// true means remove the item, false means keep it.
return val == "trillian"
})
// trillian is logged out
val, ok := cache.Get("1")
fmt.Printf("%v %v\n", val, ok) // <nil> false
val, ok = cache.Get("3")
fmt.Printf("%v %v\n", val, ok) // <nil> false
// zaphod is still logged in
val, ok = cache.Get("2")
fmt.Printf("%v %v\n", val, ok) // zaphod true
}
func main() {
// creates a cache that can hold 10 values
cache, _ := multicache.NewDefaultMulticache(10)
// GetOrFind returns the item if it's in the cache or calls the given
// function to "find" it, good if you use caching a lot and don't want to
// keep using the if ! ok { fill_the_cache(); handle_error()}
item, err := cache.GetOrFind("myKey", myMissFunction)
fmt.Printf("%v, %v\n", item, err) // myKey's value, <nil>
}