Package readcache implements a read-through cache. Items are fetched by a user-provided function.

This cache is designed for concurrency, and guarantees that concurrent access to an item only results in a single fetch.

Sample Usage

package main

import (
	"github.com/rleisti/readcache"
	"fmt"
	"time"
)

func fetch(key string) (interface {}, time.Time, error) {
	// retrieve the value for the given key
	value := "value"
	return value, time.Now().Add(60e9), nil
}

func main() {
	cache := readcache.New(fetch)
	if value, err := cache.Get("key"); err == nil {
		fmt.Printf("key = %s\n", value)
	}
}