+func (r *Registry) allocateSubs(trans *TransactionXapp, subReqMsg *e2ap.E2APSubscriptionRequest) (*Subscription, error) {
+ if len(r.subIds) > 0 {
+ sequenceNumber := r.subIds[0]
+ r.subIds = r.subIds[1:]
+ if _, ok := r.register[sequenceNumber]; ok == true {
+ r.subIds = append(r.subIds, sequenceNumber)
+ return nil, fmt.Errorf("Registry: Failed to reserve subscription exists")
+ }
+ subs := &Subscription{
+ registry: r,
+ Meid: trans.Meid,
+ SubReqMsg: subReqMsg,
+ valid: true,
+ }
+ subs.ReqId.Id = 123
+ subs.ReqId.Seq = sequenceNumber
+
+ if subs.EpList.AddEndpoint(trans.GetEndpoint()) == false {
+ r.subIds = append(r.subIds, subs.ReqId.Seq)
+ return nil, fmt.Errorf("Registry: Endpoint existing already in subscription")
+ }
+
+ return subs, nil
+ }
+ return nil, fmt.Errorf("Registry: Failed to reserve subscription no free ids")
+}
+
+func (r *Registry) findExistingSubs(trans *TransactionXapp, subReqMsg *e2ap.E2APSubscriptionRequest) *Subscription {
+
+ for _, subs := range r.register {
+ if subs.IsMergeable(trans, subReqMsg) {
+
+ //
+ // check if there has been race conditions
+ //
+ subs.mutex.Lock()
+ //subs has been set to invalid
+ if subs.valid == false {
+ subs.mutex.Unlock()
+ continue
+ }
+ // If size is zero, entry is to be deleted
+ if subs.EpList.Size() == 0 {
+ subs.mutex.Unlock()
+ continue
+ }
+ // try to add to endpointlist.
+ if subs.EpList.AddEndpoint(trans.GetEndpoint()) == false {
+ subs.mutex.Unlock()
+ continue
+ }
+ subs.mutex.Unlock()
+
+ xapp.Logger.Debug("Registry: Mergeable subs found %s for %s", subs.String(), trans.String())
+ return subs
+ }
+ }
+ return nil
+}
+
+func (r *Registry) AssignToSubscription(trans *TransactionXapp, subReqMsg *e2ap.E2APSubscriptionRequest) (*Subscription, error) {
+ var err error
+ var newAlloc bool