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41 lines
935 B
41 lines
935 B
package events
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const (
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eventsBufferSize = 1000
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)
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// An EventCache buffers events for a Fireable
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// All events are cached. Filtering happens on Flush
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type EventCache struct {
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evsw Fireable
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events []eventInfo
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}
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// Create a new EventCache with an EventSwitch as backend
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func NewEventCache(evsw Fireable) *EventCache {
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return &EventCache{
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evsw: evsw,
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events: make([]eventInfo, eventsBufferSize),
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}
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}
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// a cached event
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type eventInfo struct {
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event string
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msg interface{}
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}
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// Cache an event to be fired upon finality.
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func (evc *EventCache) FireEvent(event string, msg interface{}) {
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// append to list
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evc.events = append(evc.events, eventInfo{event, msg})
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}
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// Fire events by running evsw.FireEvent on all cached events. Blocks.
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// Clears cached events
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func (evc *EventCache) Flush() {
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for _, ei := range evc.events {
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evc.evsw.FireEvent(ei.event, ei.msg)
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}
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evc.events = make([]eventInfo, eventsBufferSize)
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}
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