refactor code structure (#1738)

pkg/simple/client/cache/cache.go

@@ -20,41 +20,4 @@ type Interface interface {
 
 	// Expires updates object's expiration time, return err if key doesn't exist
 	Expire(key string, duration time.Duration) error
-}
-
-type simpleObject struct {
-	value  string
-	expire time.Time
-}
-
-type SimpleCache struct {
-	store map[string]simpleObject
-}
-
-func NewSimpleCache() Interface {
-	return &SimpleCache{store: make(map[string]simpleObject)}
-}
-
-func (s *SimpleCache) Keys(pattern string) ([]string, error) {
-	panic("implement me")
-}
-
-func (s *SimpleCache) Set(key string, value string, duration time.Duration) error {
-	panic("implement me")
-}
-
-func (s *SimpleCache) Del(key string) error {
-	panic("implement me")
-}
-
-func (s *SimpleCache) Get(key string) (string, error) {
-	return "", nil
-}
-
-func (s *SimpleCache) Exists(key string) (bool, error) {
-	panic("implement me")
-}
-
-func (s *SimpleCache) Expire(key string, duration time.Duration) error {
-	panic("implement me")
-}
+}

pkg/simple/client/cache/simple_cache.go

@@ -0,0 +1,40 @@
+package cache
+
+import "time"
+
+type simpleObject struct {
+    value  string
+    expire time.Time
+}
+
+type SimpleCache struct {
+    store map[string]simpleObject
+}
+
+func NewSimpleCache() Interface {
+    return &SimpleCache{store: make(map[string]simpleObject)}
+}
+
+func (s *SimpleCache) Keys(pattern string) ([]string, error) {
+    panic("implement me")
+}
+
+func (s *SimpleCache) Set(key string, value string, duration time.Duration) error {
+    panic("implement me")
+}
+
+func (s *SimpleCache) Del(key string) error {
+    panic("implement me")
+}
+
+func (s *SimpleCache) Get(key string) (string, error) {
+    return "", nil
+}
+
+func (s *SimpleCache) Exists(key string) (bool, error) {
+    panic("implement me")
+}
+
+func (s *SimpleCache) Expire(key string, duration time.Duration) error {
+    panic("implement me")
+}