// NewPublication returns a new publication based on topic and payload
func NewPublication(topic string, payload proto.Message) (*Publication, error) {
payloadData, err := proto.Marshal(payload)
if err != nil {
return nil, err
}
return buildPublication("application/octetstream", topic, payloadData)
}
// NewRequest builds a new request object, checking for bad data
func NewRequest(service, endpoint string, payload proto.Message) (*Request, error) {
payloadData, err := proto.Marshal(payload)
if err != nil {
return nil, err
}
return NewProtoRequest(
service,
endpoint,
payloadData,
)
}
// Caller returns something that implements `Caller` - allowing us to use this as our
// gateway to service calls - the returned `Caller` is thread safe
func (m *Mock) Caller() Caller {
return func(req *client.Request, rsp proto.Message) errors.Error {
m.Lock()
defer m.Unlock()
for _, s := range m.stubs {
if s.matches(req) {
if s.Responder != nil {
numMatched := len(s.matched)
responderRsp, err := s.Responder(numMatched, s.matched[numMatched-1])
if err != nil {
return err
}
// put the responderRsp INTO the rsp
b, _ := proto.Marshal(responderRsp)
proto.Unmarshal(b, rsp)
return nil
}
if s.Error != nil {
return s.Error
}
// put the response INTO the rsp
b, _ := proto.Marshal(s.Response)
proto.Unmarshal(b, rsp)
return nil
}
}
// no match found - do default action
if m.proxy != nil {
return m.proxy(req, rsp)
}
// no default - return error
return errors.NotFound("mock.notfound", "No mocked service registered to handle request.")
}
}
func NewRequestFromProto(req proto.Message) *Request {
protoBytes := make([]byte, 0)
if req != nil {
protoBytes, _ = proto.Marshal(req)
}
result := NewRequestFromDelivery(amqp.Delivery{
Body: protoBytes,
ContentType: "application/octetstream",
Headers: amqp.Table(make(map[string]interface{})),
})
result.unmarshaledData = req
return result
}
// Send will ping off a trace event
func Send(e *traceproto.Event) error {
// Marshal the trace here, so it's done concurrently
msg, err := proto.Marshal(e)
if err != nil {
return err
}
// Send the marshaled trace, dropping if the backend is at capacity
select {
case traceChan <- msg:
log.Tracef("Enqueued trace event message %v", e)
default:
// Channel is full, dropping trace :(
// @todo We could instrument this, but if we're dropping traces we probably have serious problems?
return fmt.Errorf("Dropping trace as channel is full")
}
return nil
}
func response(replyTo *Request, payload proto.Message, messageType string) (rsp *Response, err error) {
rsp = &Response{
messageType: messageType,
delivery: replyTo.delivery,
}
switch replyTo.delivery.ContentType {
case "application/json":
rsp.payload, err = json.Marshal(payload)
case "application/octetstream":
rsp.payload, err = proto.Marshal(payload)
default:
err = fmt.Errorf("Unknown content type: %s", replyTo.delivery.ContentType)
}
if err != nil {
rsp = nil
log.Criticalf("[Server] Failed to marshal payload: %v", err)
}
return
}