From e8d4be579de16f334a13edd70afcbe95c60f6703 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Sat, 28 Jul 2018 01:17:35 -0700
Subject: [PATCH] send initial list of volume location

---
 weed/server/master_grpc_server.go |  6 ++++++
 weed/topology/topology_map.go     | 23 +++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/weed/server/master_grpc_server.go b/weed/server/master_grpc_server.go
index c12938374..815bcfba3 100644
--- a/weed/server/master_grpc_server.go
+++ b/weed/server/master_grpc_server.go
@@ -143,6 +143,12 @@ func (ms *MasterServer) KeepConnected(stream master_pb.Seaweed_KeepConnectedServ
 		ms.clientChansLock.Unlock()
 	}()
 
+	for _, message := range ms.Topo.ToVolumeLocations() {
+		if err := stream.Send(message); err != nil {
+			return err
+		}
+	}
+
 	go func() {
 		for {
 			_, err := stream.Recv()
diff --git a/weed/topology/topology_map.go b/weed/topology/topology_map.go
index ce8e9e663..769ba0e2a 100644
--- a/weed/topology/topology_map.go
+++ b/weed/topology/topology_map.go
@@ -1,5 +1,7 @@
 package topology
 
+import "github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+
 func (t *Topology) ToMap() interface{} {
 	m := make(map[string]interface{})
 	m["Max"] = t.GetMaxVolumeCount()
@@ -51,3 +53,24 @@ func (t *Topology) ToVolumeMap() interface{} {
 	m["DataCenters"] = dcs
 	return m
 }
+
+func (t *Topology) ToVolumeLocations() (volumeLocations []*master_pb.VolumeLocation) {
+	for _, c := range t.Children() {
+		dc := c.(*DataCenter)
+		for _, r := range dc.Children() {
+			rack := r.(*Rack)
+			for _, d := range rack.Children() {
+				dn := d.(*DataNode)
+				volumeLocation := &master_pb.VolumeLocation{
+					Url:       dn.Url(),
+					PublicUrl: dn.PublicUrl,
+				}
+				for _, v := range dn.GetVolumes() {
+					volumeLocation.NewVids = append(volumeLocation.NewVids, uint32(v.Id))
+				}
+				volumeLocations = append(volumeLocations, volumeLocation)
+			}
+		}
+	}
+	return
+}