refactor TopicPartition struct

weed/mq/topic/local_manager.go

@@ -75,10 +75,12 @@ func (manager *LocalTopicManager) CollectStats(duration time.Duration) *mq_pb.Br
 	manager.topics.IterCb(func(topic string, localTopic *LocalTopic) {
 		for _, localPartition := range localTopic.Partitions {
 			topicPartition := &TopicPartition{
-				Namespace:  string(localTopic.Namespace),
-				Topic:      localTopic.Name,
-				RangeStart: localPartition.RangeStart,
-				RangeStop:  localPartition.RangeStop,
+				Topic: Topic{Namespace: localTopic.Namespace, Name: localTopic.Name},
+				Partition: Partition{
+					RingSize:   localPartition.RingSize,
+					RangeStart: localPartition.RangeStart,
+					RangeStop:  localPartition.RangeStop,
+				},
 			}
 			stats.Stats[topicPartition.String()] = &mq_pb.TopicPartitionStats{
 				Topic: &mq_pb.Topic{

weed/mq/topic/topic.go

@@ -7,14 +7,12 @@ import (
 	"time"
 )
 
-type Namespace string
-
 type Topic struct {
-	Namespace Namespace
+	Namespace string
 	Name      string
 }
 
-func NewTopic(namespace Namespace, name string) Topic {
+func NewTopic(namespace string, name string) Topic {
 	return Topic{
 		Namespace: namespace,
 		Name:      name,
@@ -22,7 +20,7 @@ func NewTopic(namespace Namespace, name string) Topic {
 }
 func FromPbTopic(topic *mq_pb.Topic) Topic {
 	return Topic{
-		Namespace: Namespace(topic.Namespace),
+		Namespace: topic.Namespace,
 		Name:      topic.Name,
 	}
 }
@@ -41,7 +39,7 @@ type Segment struct {
 func FromPbSegment(segment *mq_pb.Segment) *Segment {
 	return &Segment{
 		Topic: Topic{
-			Namespace: Namespace(segment.Namespace),
+			Namespace: segment.Namespace,
 			Name:      segment.Topic,
 		},
 		Id: segment.Id,

weed/mq/topic/topic_partition.go

@@ -3,10 +3,8 @@ package topic
 import "fmt"
 
 type TopicPartition struct {
-	Namespace  string
-	Topic      string
-	RangeStart int32
-	RangeStop  int32
+	Topic
+	Partition
 }
 
 func (tp *TopicPartition) String() string {