// Listen on different channels and act accordingly
func (broker *Broker) listen() {
for {
select {
case s := <-broker.newClients:
// A new client has connected.
// Register their message channel
broker.clients[s] = true
log.Printf("Client added. %d registered clients", len(broker.clients))
case s := <-broker.closingClients:
// A client has dettached and we want to
// stop sending them messages.
delete(broker.clients, s)
log.Printf("Removed client. %d registered clients", len(broker.clients))
case event := <-broker.Notifier:
// We got a new event from the outside!
// Send event to all connected clients
json, err := data.EncodeJSON(event)
if err != nil {
log.Println("Error encoding event to JSON")
} else {
for clientMessageChan, _ := range broker.clients {
clientMessageChan <- json
}
}
}
}
}
func encodeEventIntoString(event *data.Event) (str string, err error) {
bytes, err := data.EncodeJSON(event)
if err != nil {
return
}
return string(bytes), err
}