func (s *server) chooseTopology(topology *goshawk.Topology) (*goshawk.Topology, error) {
var config *configuration.Configuration
if s.configFile != "" {
var err error
config, err = configuration.LoadConfigurationFromPath(s.configFile)
if err != nil {
return nil, err
}
}
switch {
case topology == nil && config == nil:
return nil, fmt.Errorf("Local data store is empty and no external config supplied. Must supply config with -config")
case topology == nil:
return goshawk.NewTopology(config), nil
case config == nil:
return topology, nil
case topology.Configuration.Equal(config):
return topology, nil
case topology.ClusterId != config.ClusterId:
return nil, fmt.Errorf("Local data store is configured for cluster '%v', but supplied config is for cluster '%v'. Cannot continue. Either adjust config or use clean data directory", topology.ClusterId, config.ClusterId)
default:
return nil, fmt.Errorf("Topology change not currently supported. Sorry.")
}
}
func (s *server) signalReloadConfig() {
if s.configFile == "" {
log.Println("Attempt to reload config failed as no path to configuration provided on command line.")
return
}
config, err := configuration.LoadConfigurationFromPath(s.configFile)
if err != nil {
log.Println("Cannot reload config due to error:", err)
return
}
s.transmogrifier.RequestConfigurationChange(config)
}
func (s *server) signalReloadConfig() {
if s.configFile == "" {
log.Println("Attempt to reload config failed as no path to configuration provided on command line.")
return
}
config, err := configuration.LoadConfigurationFromPath(s.configFile)
if err != nil {
log.Println("Cannot reload config due to error:", err)
return
}
localHost, remoteHosts, err := config.LocalRemoteHosts(s.port)
if err != nil {
log.Println("Cannot reload config due to error:", err)
return
}
s.connectionManager.SetDesiredServers(localHost, remoteHosts)
log.Println("Reloaded configuration.")
}
func (s *server) commandLineConfig() (*configuration.Configuration, error) {
if s.configFile != "" {
return configuration.LoadConfigurationFromPath(s.configFile)
}
return nil, nil
}