package control
-import "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp"
+import (
+ "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp"
+ "sync"
+)
+
+type Subscription struct {
+ Seq uint16
+ Active bool
+}
+
+func (s *Subscription) Confirmed() {
+ s.Active = true
+}
+
+func (s *Subscription) UnConfirmed() {
+ s.Active = false
+}
+
+func (s *Subscription) IsConfirmed() bool {
+ return s.Active
+}
type Registry struct {
- register map[uint16]bool
+ 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]bool)
+ r.register = make(map[uint16]*Subscription)
r.counter = seedsn
}
// Reserves and returns the next free sequence number
-func (r *Registry) ReserveSequenceNumber() uint16 {
- sequenceNumber := r.counter
- r.register[sequenceNumber] = false
- r.shift()
- return sequenceNumber
+func (r *Registry) ReserveSubscription() *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{sequenceNumber, false}
+ return r.register[sequenceNumber]
+ }
+ }
+ return nil
+}
+
+// This function checks the validity of the given subscription id
+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
}
// This function checks the validity of the given subscription id
func (r *Registry) IsValidSequenceNumber(sn uint16) bool {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
xapp.Logger.Debug("Registry map: %v", r.register)
if _, ok := r.register[sn]; ok {
return true
// This function sets the give id as confirmed in the register
func (r *Registry) setSubscriptionToConfirmed(sn uint16) {
- r.register[sn] = true
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ r.register[sn].Confirmed()
}
-func (r *Registry) shift() {
- if r.counter == 65535 {
- r.counter = 0
+//This function sets the given id as unused in the register
+func (r *Registry) setSubscriptionToUnConfirmed(sn uint16) {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ r.register[sn].UnConfirmed()
+}
+
+//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 {
- r.counter++
+ return false
}
}