func New(next http.Handler) (*LanternProFilter, error) {
return &LanternProFilter{
next: next,
proTokens: set.New(),
clientRegistry: ctrie.New(nil),
}, nil
}
func (p *Pipeline) initCache() error {
logrus.Debugf("transactor.Pipeline(%s): initializing cache", p.Domain)
p.initialized = true
log, err := view.OpenLog(p.engine, p.Domain, commitLogName)
// This denotes the domain is new.
if err == view.ErrDoesNotExist {
return nil
} else if err != nil {
return err
}
facts, err := origins.ReadAll(log.Asof(p.segment.Time))
if err != nil {
return err
}
// Sort facts by entity.
origins.Timsort(facts, origins.EAVTComparator)
// Group the facts by entity.
giter := origins.Groupby(origins.NewBuffer(facts), func(f1, f2 *origins.Fact) bool {
return f1.Entity.Is(f2.Entity)
})
// Initializing ctrie.
cache := ctrie.New(nil)
err = origins.MapFacts(giter, func(facts origins.Facts) error {
cache.Insert([]byte(facts[0].Entity.Name), facts)
return nil
})
p.cache = cache
logrus.Debugf("transactor.Pipeline(%s): cache initialized", p.Domain)
return err
}