func (this *Election) doSaveConfig(config *thispb.Configuration) {
config.CommitteeList = append([]string{}, this.committee...)
config.MajoritySize = proto.Int32(int32(this.MajoritySize()))
if this.InCommittee() {
config.InCommittee = proto.Bool(true)
}
}
func (this *Election) doRestoreConfig(config *thispb.Configuration) {
this.committee = config.GetCommitteeList()
atomic.StoreInt32(&this.majoritySize, int32(config.GetMajoritySize()))
if config.GetInCommittee() {
atomic.StoreInt32(&this.inCommittee, 1)
}
}
// Configure initializes the election instance with the committee members.
func (this *Election) Configure(agents []string) error {
lock, errLock := this.ctlr.LockAll()
if errLock != nil {
return errLock
}
defer lock.Unlock()
if this.MajoritySize() > 0 {
this.Errorf("election instance is already configured")
return errs.ErrInvalid
}
// TODO: Check for duplicates.
committee := make([]string, len(agents))
copy(committee, agents)
sort.Sort(sort.StringSlice(committee))
majoritySize := len(committee)/2 + 1
self := this.msn.UID()
inCommittee := false
for _, member := range committee {
if member == self {
inCommittee = true
break
}
}
// Save configuration in the wal.
config := thispb.Configuration{}
config.CommitteeList = committee
config.MajoritySize = proto.Int32(int32(majoritySize))
config.InCommittee = proto.Bool(inCommittee)
return this.doUpdateConfig(&config)
}