func restoreData(SM *sm.State_Machine, myConf *Config) {
//restore persistant state
last := myConf.St.GetLastIndex()
if last != -1 {
state, err := myConf.St.Get(last)
if err != nil {
panic(err)
}
data := state.(sm.Persi_State)
SM.Persi_State = data
}
//restore log
last = myConf.Lg.GetLastIndex()
if last != -1 {
for i := int64(0); i <= last; i++ {
log, err := myConf.St.Get(i)
if err != nil {
panic(err)
}
logg := log.(sm.MyLogg)
SM.Logg.Logg[i] = logg
}
}
SM.LoggInd = int32(last)
}
func initNode(Id int, myConf *Config, SM *sm.State_Machine) {
//Register a struct name by giving it a dummy object of that name.
gob.Register(sm.AppEntrReq{})
gob.Register(sm.AppEntrResp{})
gob.Register(sm.VoteReq{})
gob.Register(sm.VoteResp{})
gob.Register(sm.StateStore{})
gob.Register(sm.LoggStore{})
gob.Register(sm.CommitInfo{})
gob.Register(sm.MyLogg{})
gob.Register(sm.Commit{})
gob.Register(sm.Append{})
gob.Register(sm.Persi_State{})
//Channel initialization.
SM.CommMedium.ClientCh = make(chan interface{}, 10000)
SM.CommMedium.NetCh = make(chan interface{}, 10000)
SM.CommMedium.TimeoutCh = make(chan interface{}, 10000)
SM.CommMedium.ActionCh = make(chan interface{}, 10000)
SM.CommMedium.ShutdownCh = make(chan interface{}, 10000)
SM.CommMedium.CommitInfoCh = make(chan interface{}, 10000)
SM.CommMedium.CommitCh = make(chan interface{}, 10000)
//Seed randon number generator.
rand.Seed(time.Now().UTC().UnixNano() * int64(Id))
//Initialize the timer object for timeuts.
myConf.DoTO = time.AfterFunc(10, func() {})
//Store persitant state
myConf.DoStore = time.NewTicker(3 * time.Second)
go func() {
for _ = range myConf.DoStore.C {
last := myConf.St.GetLastIndex()
if last == -1 {
err := myConf.St.Append(SM.Persi_State)
if err != nil {
panic(err)
}
err = myConf.St.Append(SM.Persi_State)
if err != nil {
panic(err)
}
}
last = myConf.St.GetLastIndex()
myConf.St.TruncateToEnd(last)
err := myConf.St.Append(SM.Persi_State)
if err != nil {
panic(err)
}
last = myConf.St.GetLastIndex()
state, err := myConf.St.Get(last)
if err != nil {
panic(err)
}
data := state.(sm.Persi_State)
SM.Persi_State = data
}
}()
//Initialize the Log and Node configuration.
logConfig(Id, myConf)
var err error
myConf.Lg, err = log.Open(myConf.LogDir)
if err != nil {
panic(err)
}
myConf.St, err = log.Open(myConf.StDir)
if err != nil {
panic(err)
}
}
