Add s.Peers() and peer cloning.

peer.go

@@ -107,6 +107,21 @@ func (p *Peer) stop() {
 	p.heartbeatTimer.Stop()
 }
 
+//--------------------------------------
+// Copying
+//--------------------------------------
+
+// Clones the state of the peer. The clone is not attached to a server and
+// the heartbeat timer will not exist.
+func (p *Peer) clone() *Peer {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+	return &Peer{
+		name: p.name,
+		prevLogIndex: p.prevLogIndex,
+	}
+}
+
 //--------------------------------------
 // Flush
 //--------------------------------------

server.go

@@ -134,6 +134,18 @@ func (s *Server) Leader() string {
 	return s.leader
 }
 
+// Retrieves a copy of the peer data.
+func (s *Server) Peers() map[string]*Peer {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	peers := make(map[string]*Peer)
+	for name, peer := range s.peers {
+		peers[name] = peer.clone()
+	}
+	return peers
+}
+
 // Retrieves the object that transports requests.
 func (s *Server) Transporter() Transporter {
 	return s.transporter