50 lines
1.0 KiB
Go
50 lines
1.0 KiB
Go
package application
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import (
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"sync"
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"chub/internal/domain"
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)
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// EventBus is the in-process local event channel shared by the UI and CLI
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// adapters. Subscribers own cancellation; publishing never blocks a browser
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// process monitor on a slow presentation consumer.
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type EventBus struct {
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mu sync.RWMutex
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nextID uint64
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clients map[uint64]chan domain.BrowserEvent
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}
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func NewEventBus() *EventBus { return &EventBus{clients: make(map[uint64]chan domain.BrowserEvent)} }
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func (b *EventBus) Subscribe(buffer int) (<-chan domain.BrowserEvent, func()) {
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if buffer < 1 {
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buffer = 1
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}
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b.mu.Lock()
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b.nextID++
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id := b.nextID
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ch := make(chan domain.BrowserEvent, buffer)
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b.clients[id] = ch
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b.mu.Unlock()
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return ch, func() {
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b.mu.Lock()
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if existing, ok := b.clients[id]; ok {
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delete(b.clients, id)
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close(existing)
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}
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b.mu.Unlock()
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}
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}
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func (b *EventBus) Publish(event domain.BrowserEvent) {
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b.mu.RLock()
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defer b.mu.RUnlock()
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for _, ch := range b.clients {
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select {
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case ch <- event:
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default:
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}
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}
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}
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