//
// run election
//
func (s *Coordinator) runElection() (leader string, err error) {
host := s.getHostUDPAddr()
peers := s.getPeerUDPAddr()
// Create an election site to start leader election.
logging.Debugf("Coordinator.runElection(): Local Coordinator %s start election", host)
logging.Debugf("Coordinator.runElection(): Peer in election")
for _, peer := range peers {
logging.Debugf(" peer : %s", peer)
}
s.site, err = protocol.CreateElectionSite(host, peers, s.factory, s, false)
if err != nil {
return "", err
}
// blocked until leader is elected. coordinator.Terminate() will unblock this.
resultCh := s.site.StartElection()
leader, ok := <-resultCh
if !ok {
return "", NewError(ERROR_COOR_ELECTION_FAIL, NORMAL, COORDINATOR, nil,
fmt.Sprintf("Index Coordinator Election Fails"))
}
return leader, nil
}
//
// run election
//
func (s *Server) runElection() (leader string, err error) {
host := GetHostUDPAddr()
peers := GetPeerUDPAddr()
// Create an election site to start leader election.
log.Current.Debugf("Server.runElection(): Local Server %s start election", host)
log.Current.Debugf("Server.runElection(): Peer in election")
for _, peer := range peers {
log.Current.Debugf(" peer : %s", peer)
}
s.site, err = protocol.CreateElectionSite(host, peers, s.factory, s.handler, false)
if err != nil {
return "", err
}
resultCh := s.site.StartElection()
if resultCh == nil {
return "", common.NewError(common.SERVER_ERROR, "Election Site is in progress or is closed.")
}
leader, ok := <-resultCh // blocked until leader is elected
if !ok {
return "", common.NewError(common.SERVER_ERROR, "Election Fails")
}
return leader, nil
}