+ mutex sync.Mutex
+ register map[uint16]*Subscription
+ subIds []uint16
+ rtmgrClient *RtmgrClient
+}
+
+// This method should run as a constructor
+func (r *Registry) Initialize() {
+ r.register = make(map[uint16]*Subscription)
+ var i uint16
+ for i = 0; i < 65535; i++ {
+ r.subIds = append(r.subIds, i+1)
+ }
+}
+
+// Reserves and returns the next free sequence number
+func (r *Registry) ReserveSubscription(endPoint *RmrEndpoint, meid *xapp.RMRMeid) (*Subscription, error) {
+ // Check is current SequenceNumber valid
+ // Allocate next SequenceNumber value and retry N times
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ var subs *Subscription = nil
+ var retrytimes uint16 = 1000
+ for ; subs == nil && retrytimes > 0; retrytimes-- {
+ sequenceNumber := r.subIds[0]
+ r.subIds = r.subIds[1:]
+ if _, ok := r.register[sequenceNumber]; ok == false {
+ subs := &Subscription{
+ registry: r,
+ Seq: sequenceNumber,
+ Active: false,
+ RmrEndpoint: *endPoint,
+ Meid: meid,
+ Trans: nil,
+ }
+ r.register[sequenceNumber] = subs
+
+ // Update routing
+ r.mutex.Unlock()
+ err := subs.UpdateRoute(CREATE)
+ r.mutex.Lock()
+ if err != nil {
+ if _, ok := r.register[sequenceNumber]; ok {
+ delete(r.register, sequenceNumber)
+ }
+ return nil, err
+ }
+ return subs, nil
+ }
+ }
+ return nil, fmt.Errorf("Registry: Failed to reserves subscription. RmrEndpoint: %s, Meid: %s", endPoint, meid.RanName)