go-cache

A generic cache in Go

A basic generic timed in-memory cache implementation supporting any comparable key type and any value type.

Usage

A basic usage example:

package main

import (
	"fmt"
	"time"

	"github.com/antichris/go-cache"
)

func main() {
	// Initialize a new cache with string keys for string values.
	c := cache.New[string, string](10 * time.Millisecond)

	// Since the cache checks expiration timers in an asynchronous loop
	// always shut it down after use to avoid resource leaks.
	defer c.Shutdown()

	// A closure to output results of `Get` attempts for this demo.
	show := func(k string) {
		v, ok := c.Get(k)
		fmt.Printf("key: %q, value: %q, present: %v\n", k, v, ok)
	}

	// Try with a value that is absent from the cache.
	show("foo")

	c.Put("bar", "baz")
	// Try with the value that we just put in the cache.
	show("bar")

	// Wait a bit past the expiration time.
	time.Sleep(15 * time.Millisecond)

	// Try with the value that should be expired by now.
	show("bar")

	// Output:
	// key: "foo", value: "", present: false
	// key: "bar", value: "baz", present: true
	// key: "bar", value: "", present: false
}

Installation

go get github.com/antichris/go-cache

License

The source code of this project is released under Mozilla Public License Version 2.0. See LICENSE.