func Publish(messages chan *amqp.Publishing, connectionUri, exchange,
routingKey string, mandatory, immediate bool, results chan *PublishResult) {
var err error
var conn *amqp.Connection
var channel *amqp.Channel
defer close(results)
if conn, err = amqp.Dial(connectionUri); err != nil {
results <- &PublishResult{"Failed to connect", err, true}
return
}
defer conn.Close()
if channel, err = conn.Channel(); err != nil {
results <- &PublishResult{"Failed to get channel", err, true}
return
}
pubAcks, pubNacks := channel.NotifyConfirm(make(chan uint64), make(chan uint64))
chanClose := channel.NotifyClose(make(chan *amqp.Error))
if err = channel.Confirm(false); err != nil {
results <- &PublishResult{
"Failed to put channel into confirm mode",
err,
true,
}
return
}
for message := range messages {
err = channel.Publish(exchange, routingKey, mandatory, immediate, *message)
if err != nil {
results <- &PublishResult{"Failed to publish message", err, false}
continue
}
select {
case err = <-chanClose:
results <- &PublishResult{"Channel closed!", err, true}
case <-pubAcks:
results <- &PublishResult{
fmt.Sprintf("Published to exchange '%s' routing key '%v': %+v", exchange, routingKey, message),
nil,
false,
}
case <-pubNacks:
results <- &PublishResult{"Received basic.nack for message", errors.New("'basic.nack'"), false}
}
}
}
