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route_notification.go
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route_notification.go
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package bond
import (
"context"
"github.com/nokia/srlinux-ndk-go/ndk"
"google.golang.org/protobuf/encoding/prototext"
)
// ReceiveRouteNotifications starts an route notification stream
// and sends notifications to channel `Route`.
// If the main execution intends to continue running after calling this method,
// it should be called as a goroutine.
// `Route` chan carries values of type ndk.IpRouteNotification
func (a *Agent) ReceiveRouteNotifications(ctx context.Context) {
defer close(a.Notifications.Route)
routeStream := a.startRouteNotificationStream(ctx)
for routeStreamResp := range routeStream {
b, err := prototext.MarshalOptions{Multiline: true, Indent: " "}.Marshal(routeStreamResp)
if err != nil {
a.logger.Info().
Msgf("Route notification Marshal failed: %+v", err)
continue
}
a.logger.Info().
Msgf("Received Route notifications:\n%s", b)
for _, n := range routeStreamResp.GetNotification() {
routeNotif := n.GetRoute()
if routeNotif == nil {
a.logger.Info().
Msgf("Empty route notification:%+v", n)
continue
}
a.Notifications.Route <- routeNotif
}
}
}
// startRouteNotificationStream starts a notification stream for Route service notifications.
func (a *Agent) startRouteNotificationStream(ctx context.Context) chan *ndk.NotificationStreamResponse {
streamID := a.createNotificationStream(ctx)
a.logger.Info().
Uint64("stream-id", streamID).
Msg("Route notification stream created")
a.addRouteSubscription(ctx, streamID)
streamChan := make(chan *ndk.NotificationStreamResponse)
go a.startNotificationStream(ctx, streamID,
"route", streamChan)
return streamChan
}
// addRouteSubscription adds a subscription for Route service notifications
// to the allocated notification stream.
func (a *Agent) addRouteSubscription(ctx context.Context, streamID uint64) {
// create notification register request for Route service
// using acquired stream ID
notificationRegisterReq := &ndk.NotificationRegisterRequest{
Op: ndk.NotificationRegisterRequest_AddSubscription,
StreamId: streamID,
SubscriptionTypes: &ndk.NotificationRegisterRequest_Route{ // route service
Route: &ndk.IpRouteSubscriptionRequest{},
},
}
registerResp, err := a.stubs.sdkMgrService.NotificationRegister(ctx, notificationRegisterReq)
if err != nil || registerResp.GetStatus() != ndk.SdkMgrStatus_kSdkMgrSuccess {
a.logger.Printf("agent %s failed registering to notification with req=%+v: %v",
a.Name, notificationRegisterReq, err)
}
}