package notificator import ( "fmt" "github.com/nspcc-dev/neofs-node/pkg/util/logger" oid "github.com/nspcc-dev/neofs-sdk-go/object/id" "go.uber.org/zap" ) // Prm groups Notificator constructor's // parameters. All are required. type Prm struct { writer NotificationWriter notificationSource NotificationSource logger *logger.Logger } // SetLogger sets a logger. func (prm *Prm) SetLogger(v *logger.Logger) *Prm { prm.logger = v return prm } // SetWriter sets notification writer. func (prm *Prm) SetWriter(v NotificationWriter) *Prm { prm.writer = v return prm } // SetNotificationSource sets notification source. func (prm *Prm) SetNotificationSource(v NotificationSource) *Prm { prm.notificationSource = v return prm } // Notificator is a notification producer that handles // objects with defined notification epoch. // // Working client must be created via constructor New. // Using the Client that has been created with new(Client) // expression (or just declaring a Client variable) is unsafe // and can lead to panic. type Notificator struct { w NotificationWriter ns NotificationSource l *logger.Logger } // New creates, initializes and returns the Notificator instance. // // Panics if any field of the passed Prm structure is not set/set // to nil. func New(prm *Prm) *Notificator { panicOnNil := func(v interface{}, name string) { if v == nil { panic(fmt.Sprintf("Notificator constructor: %s is nil\n", name)) } } panicOnNil(prm.writer, "NotificationWriter") panicOnNil(prm.notificationSource, "NotificationSource") panicOnNil(prm.logger, "Logger") return &Notificator{ w: prm.writer, ns: prm.notificationSource, l: prm.logger, } } // ProcessEpoch looks for all objects with defined epoch in the storage // and passes their addresses to the NotificationWriter. func (n *Notificator) ProcessEpoch(epoch uint64) { logger := n.l.With(zap.Uint64("epoch", epoch)) logger.Debug("notificator: start processing object notifications") n.ns.Iterate(epoch, func(topic string, addr oid.Address) { n.l.Debug("notificator: processing object notification", zap.String("topic", topic), zap.Stringer("address", addr), ) n.w.Notify(topic, addr) }) }