allocate brokers to serve segments

weed/mq/topic.go

@@ -1,23 +1,36 @@
 package mq
 
-import "time"
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/mq_pb"
+	"time"
+)
 
 type Namespace string
 
 type Topic struct {
-	namespace Namespace
-	name      string
+	Namespace Namespace
+	Name      string
 }
 
 type Partition struct {
-	rangeStart int
-	rangeStop  int // exclusive
-	ringSize   int
+	RangeStart int
+	RangeStop  int // exclusive
+	RingSize   int
 }
 
 type Segment struct {
-	topic        Topic
-	id           int32
-	partition    Partition
-	lastModified time.Time
+	Topic        Topic
+	Id           int32
+	Partition    Partition
+	LastModified time.Time
+}
+
+func FromPbSegment(segment *mq_pb.Segment) *Segment {
+	return &Segment{
+		Topic: Topic{
+			Namespace: Namespace(segment.Namespace),
+			Name:      segment.Topic,
+		},
+		Id: segment.Id,
+	}
 }