45 lines
746 B
Go
45 lines
746 B
Go
package eventbus
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import (
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"sync"
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)
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const (
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//TODO: move to separate package
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MAPBLOCK_RENDERED = "mapblock-rendered"
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TILE_RENDERED = "rendered-tile"
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)
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type Listener interface {
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OnEvent(eventtype string, o interface{})
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}
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type Eventbus struct {
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mutex *sync.RWMutex
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listeners []Listener
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}
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func New() *Eventbus {
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eb := Eventbus{}
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eb.mutex = &sync.RWMutex{}
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eb.listeners = make([]Listener, 0)
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return &eb
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}
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func (this *Eventbus) Emit(eventtype string, o interface{}) {
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this.mutex.RLock()
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defer this.mutex.RUnlock()
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for _, l := range this.listeners {
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l.OnEvent(eventtype, o)
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}
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}
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func (this *Eventbus) AddListener(l Listener) {
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this.mutex.Lock()
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defer this.mutex.Unlock()
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this.listeners = append(this.listeners, l)
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}
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