func (logger *logger) Start() error {
logger.started = time.Now()
if logger.Formatter == nil {
return fmt.Errorf("Formatter must be set")
}
logger.pubSub = pubsub.New()
RegisterPubSub(logger.pubSub)
logger.subscription = logger.pubSub.Subscribe(func(m *Message) {
if message := logger.Formatter(m); message != "" {
fmt.Fprintln(logger.Output, message)
}
})
return nil
}
func main() {
ps := pubsub.New()
stringSubscription := ps.Subscribe(func(m string) {
log.Printf("got string %q", m)
})
defer stringSubscription.Close()
userSubscription := ps.Subscribe(func(u *User) {
log.Printf("got user %+v", u)
})
defer userSubscription.Close()
ps.Publish("hello")
ps.Publish("world")
ps.Publish(&User{name: "Hans"})
ps.Publish(&User{name: "Meyer"})
}