func createReq(r *http.Request) (network.Request, error) {
var err error
var requestID string
var start = time.Now()
//read request
message, err := network.ReadMessage(r)
if err != nil {
log.Println("Cannot read message")
return network.Request{}, err
}
requestID = message.Args
if requestID == "" {
log.Println("New request, generating ID")
requestID = strconv.Itoa(readAndIncrementCounter())
}
log.Printf("Received request %s from %s\n", requestID, message.Sender)
toService, err := network.ReadParam("service", r)
if err != nil {
log.Println("Cannot read param 'service'")
}
req := network.Request{
ID: requestID,
From: message.Sender,
To: toService,
Counter: len(destinations),
Start: start,
ExecTimeMs: 0,
}
return req, nil
}
func readResponse(w http.ResponseWriter, r *http.Request) {
var err error
var respTimeMs float64
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
message, err := network.ReadMessage(r)
if err != nil {
log.Println("Cannot read message")
w.WriteHeader(422)
return
}
log.Println("Received response from ", message.Sender)
reqId := message.Args
if req, ok := requests[reqId]; ok {
respTimeMs = time.Since(req.Start).Seconds() * 1000
complete := updateRequestInHistory(reqId)
if complete {
respondeToRequest(req.From, req.ID, message.Body)
}
} else {
log.Println("Cannot find request ID in history")
w.WriteHeader(422)
return
}
if message.Body == "done" {
log.Println("service " + name + " " + "response_time" + ":" + strconv.FormatFloat(respTimeMs, 'f', 2, 64) + "ms")
if useMetrics {
metric.SendResponseTime(respTimeMs)
}
} else {
log.Println("Error: request lost.")
}
w.WriteHeader(http.StatusCreated)
}