makes listServers api more informative

.gitignore

@@ -60,3 +60,6 @@ config.toml
 
 # test data files
 integration/migration_data/
+
+# goide project files
+.idea

api/http/api.go

@@ -985,8 +985,22 @@ func (self *HttpServer) listServers(w libhttp.ResponseWriter, r *libhttp.Request
 	self.tryAsClusterAdmin(w, r, func(u User) (int, interface{}) {
 		servers := self.clusterConfig.Servers()
 		serverMaps := make([]map[string]interface{}, len(servers), len(servers))
+
+		//FIXME: GetLeaderConnectString is not consistent yet when called on different server.
+		leaderConnectString, _ := self.raftServer.GetLeaderConnectString()
+		leaderRaftName := self.raftServer.GetLeaderRaftName()
 		for i, s := range servers {
-			serverMaps[i] = map[string]interface{}{"id": s.Id, "protobufConnectString": s.ProtobufConnectionString}
+			serverMaps[i] = map[string]interface{}{
+				"id": s.Id,
+				"protobufConnectString": s.ProtobufConnectionString,
+				"isUp":                  s.IsUp(), //FIXME: IsUp is not consistent
+				"raftName":              s.RaftName,
+				"state":                 s.State,
+				"stateName":             s.GetStateName(),
+				"raftConnectionString":  s.RaftConnectionString,
+				"leaderRaftName":        leaderRaftName,
+				"leaderConnectString":   leaderConnectString,
+				"isLeader":              self.raftServer.IsLeaderByRaftName(s.RaftName)}
 		}
 		return libhttp.StatusOK, serverMaps
 	})

cluster/cluster_server.go

@@ -48,6 +48,22 @@ const (
 	Potential
 )
 
+func (self *ClusterServer) GetStateName() (stateName string) {
+	switch {
+	case self.State == LoadingRingData:
+		return "LoadingRingData"
+	case self.State == SendingRingData:
+		return "SendingRingData"
+	case self.State == DeletingOldData:
+		return "DeletingOldData"
+	case self.State == Running:
+		return "Running"
+	case self.State == Potential:
+		return "Potential"
+	}
+	return "UNKNOWN"
+}
+
 func NewClusterServer(raftName, raftConnectionString, protobufConnectionString string, connection ServerConnection, config *c.Configuration) *ClusterServer {
 
 	s := &ClusterServer{

coordinator/raft_server.go

@@ -115,6 +115,19 @@ func (s *RaftServer) GetRaftName() string {
 	return s.name
 }
 
+func (s *RaftServer) GetLeaderRaftName() string {
+	return s.raftServer.Leader()
+}
+
+func (s *RaftServer) IsLeaderByRaftName(name string) bool {
+	//s.raftServer.State() == raft.Leader
+	return s.raftServer.Leader() == name
+}
+
+func (s *RaftServer) GetLeaderConnectString() (string, bool) {
+	return s.leaderConnectString()
+}
+
 func (s *RaftServer) leaderConnectString() (string, bool) {
 	leader := s.raftServer.Leader()
 	peers := s.raftServer.Peers()