package control
+import (
+ "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp"
+ "strconv"
+ "sync"
+)
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type Subscription struct {
+ mutex sync.Mutex
+ Seq uint16
+ Active bool
+ //
+ Meid *xapp.RMRMeid
+ RmrEndpoint // xapp endpoint
+ Trans *Transaction
+}
+
+func (s *Subscription) String() string {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return strconv.FormatUint(uint64(s.Seq), 10) + "/" + s.RmrEndpoint.String() + "/" + s.Meid.RanName
+}
+
+func (s *Subscription) Confirmed() {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ s.Active = true
+}
+
+func (s *Subscription) UnConfirmed() {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ s.Active = false
+}
+
+func (s *Subscription) IsConfirmed() bool {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return s.Active
+}
+
+func (s *Subscription) SetTransaction(trans *Transaction) bool {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ if s.Trans == nil {
+ s.Trans = trans
+ return true
+ }
+ return false
+}
+
+func (s *Subscription) UnSetTransaction(trans *Transaction) bool {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ if trans == nil || trans == s.Trans {
+ s.Trans = nil
+ return true
+ }
+ return false
+}
+
+func (s *Subscription) GetTransaction() *Transaction {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return s.Trans
+}
+
+func (s *Subscription) SubRouteInfo(act Action) SubRouteInfo {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SubRouteInfo{act, s.RmrEndpoint.Addr, s.RmrEndpoint.Port, s.Seq}
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
type Registry struct {
- counter int
+ register map[uint16]*Subscription
+ counter uint16
+ mutex sync.Mutex
+}
+
+// This method should run as a constructor
+func (r *Registry) Initialize(seedsn uint16) {
+ r.register = make(map[uint16]*Subscription)
+ r.counter = seedsn
+}
+
+// Reserves and returns the next free sequence number
+func (r *Registry) ReserveSubscription(endPoint RmrEndpoint, meid *xapp.RMRMeid) *Subscription {
+ // 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.counter
+ if r.counter == 65535 {
+ r.counter = 0
+ } else {
+ r.counter++
+ }
+ if _, ok := r.register[sequenceNumber]; ok == false {
+ r.register[sequenceNumber] = &Subscription{
+ Seq: sequenceNumber,
+ Active: false,
+ RmrEndpoint: endPoint,
+ Meid: meid,
+ Trans: nil,
+ }
+ return r.register[sequenceNumber]
+ }
+ }
+ return nil
}
-func (r *Registry) GetSubscriptionId() int {
- return r.generateId()
+func (r *Registry) GetSubscription(sn uint16) *Subscription {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ xapp.Logger.Debug("Registry map: %v", r.register)
+ if _, ok := r.register[sn]; ok {
+ return r.register[sn]
+ }
+ return nil
}
-func (r *Registry) generateId() int {
- r.counter += 1
- return r.counter
+//This function releases the given id as unused in the register
+func (r *Registry) releaseSequenceNumber(sn uint16) bool {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ if _, ok := r.register[sn]; ok {
+ delete(r.register, sn)
+ return true
+ } else {
+ return false
+ }
}