initial import

core/stores/redis/scriptcache.go

@@ -0,0 +1,48 @@
+package redis
+
+import (
+	"sync"
+	"sync/atomic"
+)
+
+var (
+	once     sync.Once
+	lock     sync.Mutex
+	instance *ScriptCache
+)
+
+type (
+	Map map[string]string
+
+	ScriptCache struct {
+		atomic.Value
+	}
+)
+
+func GetScriptCache() *ScriptCache {
+	once.Do(func() {
+		instance = &ScriptCache{}
+		instance.Store(make(Map))
+	})
+
+	return instance
+}
+
+func (sc *ScriptCache) GetSha(script string) (string, bool) {
+	cache := sc.Load().(Map)
+	ret, ok := cache[script]
+	return ret, ok
+}
+
+func (sc *ScriptCache) SetSha(script, sha string) {
+	lock.Lock()
+	defer lock.Unlock()
+
+	cache := sc.Load().(Map)
+	newCache := make(Map)
+	for k, v := range cache {
+		newCache[k] = v
+	}
+	newCache[script] = sha
+	sc.Store(newCache)
+}