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pubsub: Refactor Event Subscription (#6634)

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This commit is contained in:
Aleksandr Bezobchuk
2021-07-01 11:17:48 -04:00
committed by GitHub
parent b0a413eb17
commit 414130aee1
19 changed files with 428 additions and 226 deletions
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libs/events/events.go
+10 -8
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@@ -32,7 +32,7 @@ type Eventable interface {
//
// FireEvent fires an event with the given name and data.
type Fireable interface {
FireEvent(event string, data EventData)
FireEvent(eventValue string, data EventData)
}
// EventSwitch is the interface for synchronous pubsub, where listeners
@@ -46,7 +46,7 @@ type EventSwitch interface {
service.Service
Fireable
AddListenerForEvent(listenerID, event string, cb EventCallback) error
AddListenerForEvent(listenerID, eventValue string, cb EventCallback) error
RemoveListenerForEvent(event string, listenerID string)
RemoveListener(listenerID string)
}
@@ -74,27 +74,29 @@ func (evsw *eventSwitch) OnStart() error {
func (evsw *eventSwitch) OnStop() {}
func (evsw *eventSwitch) AddListenerForEvent(listenerID, event string, cb EventCallback) error {
func (evsw *eventSwitch) AddListenerForEvent(listenerID, eventValue string, cb EventCallback) error {
// Get/Create eventCell and listener.
evsw.mtx.Lock()
eventCell := evsw.eventCells[event]
eventCell := evsw.eventCells[eventValue]
if eventCell == nil {
eventCell = newEventCell()
evsw.eventCells[event] = eventCell
evsw.eventCells[eventValue] = eventCell
}
listener := evsw.listeners[listenerID]
if listener == nil {
listener = newEventListener(listenerID)
evsw.listeners[listenerID] = listener
}
evsw.mtx.Unlock()
// Add event and listener.
if err := listener.AddEvent(event); err != nil {
if err := listener.AddEvent(eventValue); err != nil {
return err
}
eventCell.AddListener(listenerID, cb)
eventCell.AddListener(listenerID, cb)
return nil
}