46 lines
685 B
Go
46 lines
685 B
Go
package bus
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
type eventbus struct {
|
|
sync.Mutex
|
|
subs map[chan *Event]bool
|
|
}
|
|
|
|
// New creates a simple event bus that manages a list of
|
|
// subscribers to which events are published.
|
|
func New() Bus {
|
|
return newEventbus()
|
|
}
|
|
|
|
func newEventbus() *eventbus {
|
|
return &eventbus{
|
|
subs: make(map[chan *Event]bool),
|
|
}
|
|
}
|
|
|
|
func (b *eventbus) Subscribe(c chan *Event) {
|
|
b.Lock()
|
|
b.subs[c] = true
|
|
b.Unlock()
|
|
}
|
|
|
|
func (b *eventbus) Unsubscribe(c chan *Event) {
|
|
b.Lock()
|
|
delete(b.subs, c)
|
|
b.Unlock()
|
|
}
|
|
|
|
func (b *eventbus) Publish(event *Event) {
|
|
b.Lock()
|
|
defer b.Unlock()
|
|
|
|
for s := range b.subs {
|
|
go func(c chan *Event) {
|
|
defer recover()
|
|
c <- event
|
|
}(s)
|
|
}
|
|
}
|