eventbus

type EventBus interface {
	// Publish publishes arguments to the given topic subscribers
	// Publish block only when the buffer of one of the subscribers is full.
	Publish(topic string, args ...interface{})
	// Close unsubscribe all handlers from given topic
	Close(topic string)
	// Subscribe subscribes to the given topic
	Subscribe(topic string, fn interface{}) error
	// Unsubscribe unsubscribe handler from the given topic
	Unsubscribe(topic string, fn interface{}) error
}