feat: added configuration center function (#3035)

Co-authored-by: aiden.ma <Aiden.ma@yijinin.com>

core/discov/subscriber.go

@@ -15,9 +15,10 @@ type (
 
 	// A Subscriber is used to subscribe the given key on an etcd cluster.
 	Subscriber struct {
-		endpoints []string
-		exclusive bool
-		items     *container
+		endpoints     []string
+		exclusive     bool
+		disablePrefix bool
+		items         *container
 	}
 )
 
@@ -34,7 +35,7 @@ func NewSubscriber(endpoints []string, key string, opts ...SubOption) (*Subscrib
 	}
 	sub.items = newContainer(sub.exclusive)
 
-	if err := internal.GetRegistry().Monitor(endpoints, key, sub.items); err != nil {
+	if err := internal.GetRegistry().Monitor(endpoints, key, sub.items, sub.disablePrefix); err != nil {
 		return nil, err
 	}
 
@@ -59,6 +60,13 @@ func Exclusive() SubOption {
 	}
 }
 
+// WithDisablePrefix turn off querying using key prefixes.
+func WithDisablePrefix() SubOption {
+	return func(sub *Subscriber) {
+		sub.disablePrefix = true
+	}
+}
+
 // WithSubEtcdAccount provides the etcd username/password.
 func WithSubEtcdAccount(user, pass string) SubOption {
 	return func(sub *Subscriber) {