func (s *Server) parseNode(cfg config.NodeConfig) (*backend.Node, error) {
var err error
n := new(backend.Node)
n.Cfg = cfg
n.DownAfterNoAlive = time.Duration(cfg.DownAfterNoAlive) * time.Second
err = n.ParseMaster(cfg.Master)
if err != nil {
return nil, err
}
err = n.ParseSlave(cfg.Slave)
if err != nil {
return nil, err
}
go n.CheckNode()
return n, nil
}
func (c *ClientConn) getBackendConn(n *backend.Node, fromSlave bool) (co *backend.BackendConn, err error) {
if !c.isInTransaction() {
if fromSlave {
co, err = n.GetSlaveConn()
if err != nil {
co, err = n.GetMasterConn()
}
} else {
co, err = n.GetMasterConn()
}
if err != nil {
golog.Error("server", "getBackendConn", err.Error(), 0)
return
}
} else {
var ok bool
c.Lock()
co, ok = c.txConns[n]
c.Unlock()
if !ok {
if co, err = n.GetMasterConn(); err != nil {
return
}
if err = co.Begin(); err != nil {
return
}
c.Lock()
c.txConns[n] = co
c.Unlock()
}
}
//todo, set conn charset, etc...
if err = co.UseDB(c.db); err != nil {
return
}
if err = co.SetCharset(c.charset); err != nil {
return
}
return
}