// ReingestOutdated finds old ledgers and reimports them.
func (i *System) ReingestOutdated() (n int, err error) {
q := history.Q{Repo: i.HorizonDB}
// NOTE: this loop will never terminate if some bug were cause a ledger
// reingestion to silently fail.
for {
outdated := []int32{}
err = q.OldestOutdatedLedgers(&outdated, CurrentVersion)
if err != nil {
return
}
if len(outdated) == 0 {
return
}
log.
WithField("lowest_sequence", outdated[0]).
WithField("batch_size", len(outdated)).
Info("reingest: outdated")
var start, end int32
flush := func() error {
ingested, ferr := i.ReingestRange(start, end)
if ferr != nil {
return ferr
}
n += ingested
return nil
}
for idx := range outdated {
seq := outdated[idx]
if start == 0 {
start = seq
end = seq
continue
}
if seq == end+1 {
end = seq
continue
}
err = flush()
if err != nil {
return
}
start = seq
end = seq
}
err = flush()
if err != nil {
return
}
}
}
