func newSyncClient(selfID cluster.MemberID, member cluster.Member, httpclient *http.Client, eventsChan chan<- *InMessage, logger *log.Entry) error {
client := &syncClient{
selfID: selfID,
member: member,
httpclient: httpclient,
evChan: eventsChan,
logger: logger.WithFields(log.Fields{"peer": member.ID()}),
}
client.logger.Info("Creating a sync client to peer")
r, err := client.connect()
if err != nil {
return err
}
client.readEvents(r)
return nil
}
// Invoked when a member leaves a cluster.
func (s *server) OnLeave(m cluster.Member) {
if s.selfID == m.ID() {
return
}
s.clientsLock.Lock()
defer s.clientsLock.Unlock()
s.logger.Infof("Member %s left the cluster", m)
if client, exists := s.clients[m.ID()]; exists {
client.close()
delete(s.clients, m.ID())
s.health.RemoveClient(m.ID())
}
}
// Invoked when a member joins a cluster.
func (s *server) OnJoin(m cluster.Member) {
if s.selfID == m.ID() {
return
}
s.clientsLock.Lock()
defer s.clientsLock.Unlock()
s.logger.Infof("Peer Member %s joined the cluster", m)
if client, exists := s.clients[m.ID()]; exists {
client.close()
delete(s.clients, m.ID())
s.health.RemoveClient(m.ID())
}
client, err := newClient(s.selfID, m, s.httpclient, s.notifyChannel, s.logger)
if err != nil {
s.logger.WithFields(log.Fields{
"error": err,
}).Errorf("Failed to add the member %s", m)
return
}
s.clients[m.ID()] = client
s.health.AddClient(m.ID(), client)
}
