func (g *group) applyConfChange(e raftpb.Entry) error {
var cc raftpb.ConfChange
pbutil.MustUnmarshal(&cc, e.Data)
glog.V(2).Infof("%v applies conf change %v: %#v", g, e.Index, cc)
if len(cc.Context) == 0 {
g.stateMachine.ApplyConfChange(cc, GroupNode{})
return nil
}
if id, req, err := g.node.decReq(cc.Context); err == nil {
if gn, ok := req.Data.(GroupNode); ok {
res := Response{ID: id}
res.Err = g.stateMachine.ApplyConfChange(cc, gn)
g.node.line.call(res)
return nil
}
}
var gn GroupNode
if err := bhgob.Decode(&gn, cc.Context); err != nil {
glog.Fatalf("%v cannot decode config change: %v", g, err)
}
if gn.Node != cc.NodeID {
glog.Fatalf("invalid config change: %v != %v", gn.Node, cc.NodeID)
}
g.stateMachine.ApplyConfChange(cc, gn)
return nil
}
func (r *registry) Restore(b []byte) error {
r.m.Lock()
defer r.m.Unlock()
glog.V(2).Info("registry restored")
return bhgob.Decode(r, b)
}