go-eventbus/interface.go
2019-06-13 10:04:12 +02:00

35 lines
976 B
Go

package event
type SubSettings struct {}
type SubOption func(*SubSettings)
type EmitterSettings struct {}
type EmitterOption func(*EmitterSettings)
type Bus interface {
// Subscribe creates new subscription. Failing to drain the incoming channel
// will cause publishers to get blocked
//
// evtTypes only accepts typed nil pointers, and uses the type information to
// select output type
//
// Example:
// sub, cancel, err := eventbus.Subscribe(new(os.Signal))
// defer cancel()
//
// evt := (<-sub).(os.Signal) // guaranteed to be safe
Subscribe(eventType interface{}, opts ...SubOption) (<-chan interface{}, CancelFunc, error)
Emitter(eventType interface{}, opts ...EmitterOption) (EmitFunc, CancelFunc, error)
}
// EmitFunc emits events. If any channel subscribed to the topic is blocked,
// calls to EmitFunc will block
//
// Calling this function with wrong event type will cause a panic
type EmitFunc func(event interface{})
type CancelFunc func()