func (t *rabbitTransport) Send(req message.Request, _timeout time.Duration) (message.Response, error) {
id := req.Id()
if id == "" {
_uuid, err := uuid.NewV4()
if err != nil {
log.Errorf("[Typhon:RabbitTransport] Failed to generate request uuid: %v", err)
return nil, err
}
req.SetId(_uuid.String())
}
rspQueue := req.Id()
defer func() {
t.inflightReqsM.Lock()
delete(t.inflightReqs, rspQueue)
t.inflightReqsM.Unlock()
}()
rspChan := make(chan message.Response, 1)
t.inflightReqsM.Lock()
t.inflightReqs[rspQueue] = rspChan
t.inflightReqsM.Unlock()
timeout := time.NewTimer(_timeout)
defer timeout.Stop()
headers := req.Headers()
headers["Content-Encoding"] = "request"
headers["Service"] = req.Service()
headers["Endpoint"] = req.Endpoint()
select {
case <-t.Ready():
case <-timeout.C:
log.Warnf("[Typhon:RabbitTransport] Timed out after %s waiting for ready", _timeout.String())
return nil, transport.ErrTimeout
}
if err := t.connection().Publish(Exchange, req.Service(), amqp.Publishing{
CorrelationId: req.Id(),
Timestamp: time.Now().UTC(),
Body: req.Payload(),
ReplyTo: t.replyQueue,
Headers: headersToTable(headers),
}); err != nil {
log.Errorf("[Typhon:RabbitTransport] Failed to publish: %v", err)
return nil, err
}
select {
case rsp := <-rspChan:
return rsp, nil
case <-timeout.C:
log.Warnf("[Typhon:RabbitTransport] Timed out after %s waiting for response to %s", _timeout.String(),
req.Id())
return nil, transport.ErrTimeout
}
}
