patrickmn/go-cache

# go-cache go-cache 是一个内存中的 key:value 存储/缓存，类似于 memcached，适用于在单机上运行的应用程序。它的主要优点在于，它本质上是一个带有过期时间的、线程安全的 `map[string]interface{}`，因此不需要将其内容序列化或通过网络传输。 任何对象都可以被存储一段指定的时间或永久存储，并且该缓存可以安全地被多个 goroutine 使用。 虽然 go-cache 并不打算被用作持久化数据存储，但整个缓存可以被保存到文件中并从中加载（使用 `c.Items()` 检索 item map 进行序列化，并使用 `NewFrom()` 从反序列化的数据创建缓存），以便从停机状态中快速恢复。（有关注意事项，请参阅 `NewFrom()` 的文档。） ### 安装 `go get github.com/patrickmn/go-cache` ### 用法 ``` import ( "fmt" "github.com/patrickmn/go-cache" "time" ) func main() { // Create a cache with a default expiration time of 5 minutes, and which // purges expired items every 10 minutes c := cache.New(5*time.Minute, 10*time.Minute) // Set the value of the key "foo" to "bar", with the default expiration time c.Set("foo", "bar", cache.DefaultExpiration) // Set the value of the key "baz" to 42, with no expiration time // (the item won't be removed until it is re-set, or removed using // c.Delete("baz") c.Set("baz", 42, cache.NoExpiration) // Get the string associated with the key "foo" from the cache foo, found := c.Get("foo") if found { fmt.Println(foo) } // Since Go is statically typed, and cache values can be anything, type // assertion is needed when values are being passed to functions that don't // take arbitrary types, (i.e. interface{}). The simplest way to do this for // values which will only be used once--e.g. for passing to another // function--is: foo, found := c.Get("foo") if found { MyFunction(foo.(string)) } // This gets tedious if the value is used several times in the same function. // You might do either of the following instead: if x, found := c.Get("foo"); found { foo := x.(string) // ... } // or var foo string if x, found := c.Get("foo"); found { foo = x.(string) } // ... // foo can then be passed around freely as a string // Want performance? Store pointers! c.Set("foo", &MyStruct, cache.DefaultExpiration) if x, found := c.Get("foo"); found { foo := x.(*MyStruct) // ... } } ``` ### 参考 `godoc` 或 [http://godoc.org/github.com/patrickmn/go-cache](http://godoc.org/github.com/patrickmn/go-cache)

标签：EVTX分析, Go, Ruby工具, 内存数据库, 开发组件, 日志审计, 缓存, 键值存储