feat(cache): add cache stats

.gitignore

@@ -1 +1,2 @@
-.idea
+.idea
+go.sum

cache.go

@@ -50,10 +50,24 @@ func NewSyncCacheClient(opts SyncCacheOpts) *SyncCacheClient {
 
 func (c *SyncCacheClient) AddCacheGroup(cacheGroupName string, getterFunc GetterFunc) {
 	c.cacheGroupManager.Lock()
-	c.cacheGroupManager.cacheGroups[cacheGroupName] = NewCacheGroup(getterFunc)
+	c.cacheGroupManager.cacheGroups[cacheGroupName] = NewCacheGroup(cacheGroupName, getterFunc)
 	c.cacheGroupManager.Unlock()
 }
 
+func (c *SyncCacheClient) GetCacheGroup(cacheGroupName string) *CacheGroup {
+	c.cacheGroupManager.RUnlock()
+	g := c.cacheGroupManager.cacheGroups[cacheGroupName]
+	c.cacheGroupManager.RUnlock()
+	return g
+}
+
+func (c *SyncCacheClient) GetCacheGroups() map[string]*CacheGroup {
+	c.cacheGroupManager.RUnlock()
+	g := c.cacheGroupManager.cacheGroups
+	c.cacheGroupManager.RUnlock()
+	return g
+}
+
 func (c *SyncCacheClient) RemoveCacheGroup(cacheGroupName string) {
 	c.cacheGroupManager.Lock()
 	delete(c.cacheGroupManager.cacheGroups, cacheGroupName)

group.go

@@ -8,6 +8,7 @@ type GetterFunc func(key string, setCacheFunc SetCacheFunc) error
 type SetCacheFunc func(i interface{})
 
 type CacheGroup struct {
+	name string
 	sync.RWMutex
 	cache      map[string]CacheEntity
 	getterFunc GetterFunc
@@ -18,13 +19,28 @@ type CacheEntity struct {
 	object interface{}
 }
 
-func NewCacheGroup(getterFunc GetterFunc) *CacheGroup {
+type CacheStats struct {
+	Items int
+}
+
+func NewCacheGroup(name string, getterFunc GetterFunc) *CacheGroup {
 	return &CacheGroup{
+		name:       name,
 		cache:      make(map[string]CacheEntity, GroupCacheCapacity),
 		getterFunc: getterFunc,
 	}
 }
 
+func (g *CacheGroup) Name() string {
+	return g.name
+}
+
+func (g *CacheGroup) CacheStats() *CacheStats {
+	return &CacheStats{
+		Items: len(g.cache),
+	}
+}
+
 func (g *CacheGroup) set(key string, i interface{}, uuid string) {
 	g.Lock()
 	g.cache[key] = CacheEntity{