func (b *broker) unsubscribe(l event.Link) {
if l.IsSender() {
q := b.queues[l.RemoteSource().Address()]
if q != nil {
q.unsubscribe(l)
if q.empty() {
debug.Printf("Delete queue %s", q.name)
delete(b.queues, q.name)
}
}
}
}
func (q *queue) popTo(context *event.Pump, link event.Link) bool {
if q.messages.Len() != 0 && link.Credit() > 0 {
message := q.messages.Remove(q.messages.Front()).(proton.Message)
debug.Printf("link %s <- queue %s: %s", logLink(link), q.name, formatMessage{message})
// The first return parameter is an event.Delivery.
// The Deliver can be used to track message status, e.g. so we can re-delver on failure.
// This demo broker doesn't do that.
linkPump := link.Session().Connection().Pump()
if context == linkPump {
if context == nil {
log.Fatal("pop in nil context")
}
link.Send(message) // link is in the current pump, safe to call Send() direct
} else {
linkPump.Inject <- func() { // Inject to link's pump
link.Send(message) // FIXME aconway 2015-05-04: error handlig
}
}
return true
}
return false
}