优化部分

cachex/cachex.go

@@ -5,12 +5,16 @@ import (
 	"time"
 )
 
-// 内存缓存
+// 应用内缓存
+// 特点
+// 1.全局单实例
 // 到设定的点就删除
 
-var store sync.Map
-
-type cache struct {}
+type cache struct{
+	store sync.Map
+}
+var one sync.Once
+var c cache
 
 type cacheData struct {
 	key    string
@@ -19,20 +23,38 @@ type cacheData struct {
 }
 
 func NewCache() *cache {
-	return &cache{}
+	one.Do(func() {
+		c = cache{}
+
+		go func(){
+			for {
+				c.store.Range(func(key, value interface{}) bool {
+					if value.(*cacheData).expire.Before(time.Now()) {
+						c.store.Delete(key)
+					}
+					return true
+				})
+		
+				time.Sleep(time.Second * 5)
+			}
+		}()
+	})
+	return &c
 }
 
+// 设置缓存
 func (c *cache) Set(key string, value interface{}, expire time.Duration) {
-	cd := &cacheData{key,value,time.Now().Add(expire)}
-	store.Store(key, cd)
+	cd := &cacheData{key, value, time.Now().Add(expire)}
+	c.store.Store(key, cd)
 }
 
+// 读取缓存
 func (c *cache) Get(key string) interface{} {
-	if v, ok := store.Load(key); ok {
+	if v, ok := c.store.Load(key); ok {
 
 		cc := v.(*cacheData)
 		if cc.expire.Before(time.Now()) {
-			store.Delete(key)
+			c.store.Delete(key)
 			return nil
 		}
 		return cc.data
@@ -40,20 +62,7 @@ func (c *cache) Get(key string) interface{} {
 	return nil
 }
 
+// 删除缓存
 func (c *cache) Delete(key string) {
-	store.Delete(key)
-}
-
-func init() {
-	for {
-		store.Range(func(key, value interface{}) bool {
-			if value.(*cacheData).expire.Before(time.Now()) {
-				store.Delete(key)
-			}
-			return true
-		})
-
-		time.Sleep(time.Second * 5)
-	}
-
+	c.store.Delete(key)
 }