# go-cache
[](https://github.com/num30/go-cache/actions/workflows/test.yaml)
[](https://codecov.io/gh/num30/go-cache)
[](https://goreportcard.com/report/github.com/num30/go-cache)
ℹ ️ go-cache ](https://github.com/patrickmn/go-cache ) library that was written by @patrickmn . The main defference is that it relies on generics instead of reflection.
go-cache is a in-memory key:value store/cache similar to memcached that is
suitable for applications running on a single machine. Its major advantage is
that, being essentially a thread-safe `map[string][T]` with expiration
times, it doesn't need to serialize or transmit its contents over the network.
Any object can be stored, for a given duration or forever, and the cache can be
safely used by multiple goroutines.
Although go-cache isn't meant to be used as a persistent datastore, the entire
cache can be saved to and loaded from a file (using `c.Items()` to retrieve the
items map to serialize, and `NewFrom()` to create a cache from a deserialized
one) to recover from downtime quickly. (See the docs for `NewFrom()` for caveats.)
### Installation
`go get github.com/num30/go-cache`
### Usage
```go
import (
"fmt"
"github.com/num30/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[string](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 "lightning", with no expiration time
// (the item won't be removed until it is re-set, or removed using
// c.Delete("baz")
c.Set("baz", "lightning", cache.NoExpiration)
// Get the string associated with the key "foo" from the cache
foo, found := c.Get("foo")
if found {
fmt.Println(foo)
}
// Want performance? Store pointers!
structCache := cache.New[MyStruct](5*time.Minute, 10*time.Minute)
structCache.Set("foo", & MyStruct, cache.DefaultExpiration)
if x, found := c.Get("foo"); found {
fmt.Println(")
}
}
```
Run this example with `go run examples/main.go` .
### Reference
`godoc` or [http://godoc.org/github.com/num30/go-cache ](http://godoc.org/github.com/num30/go-cache )
