/
main.go
101 lines (86 loc) · 1.99 KB
/
main.go
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package main
import (
"encoding/json"
"fmt"
"log"
"net/http"
"github.com/arvindram03/asynch-workers/data"
"github.com/arvindram03/asynch-workers/rabbitmq"
"github.com/robfig/config"
)
const (
POST = "POST"
)
var (
Config *config.Config
ENV string
)
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello Gophers :)")
}
func metricHandler(w http.ResponseWriter, r *http.Request) {
if r.Method != POST {
w.WriteHeader(http.StatusNotFound)
return
}
rabbitmqUrl, _ := Config.String(ENV, "rabbitmq-url")
conn, err := rabbitmq.Dial(rabbitmqUrl)
if err != nil {
log.Fatalf("Failed to get connection. ERR: %+v", err)
}
defer conn.Close()
ch, err := rabbitmq.Channel(conn)
if err != nil {
log.Fatalf("Failed to open channel. ERR: %+v", err)
}
defer ch.Close()
ch.Confirm(false)
ack, nack := rabbitmq.GetAckNack(ch)
exchange, _ := Config.String(ENV, "exchange")
err = rabbitmq.Exchange(exchange, ch)
if err != nil {
log.Fatalf("Failed to declare an exchange. ERR: %+v", err)
}
decoder := json.NewDecoder(r.Body)
var metric data.Metric
err = decoder.Decode(&metric)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
metricJson, err := json.Marshal(metric)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
err = rabbitmq.PublishJson(metricJson, exchange, ch)
if err != nil {
log.Fatalf("Failed to publish message. ERR: %+v", err)
}
select {
case <-ack:
log.Printf("Pushed. Metric: %+v\n", metric)
w.WriteHeader(http.StatusOK)
case <-nack:
log.Printf("Failed tp push. Metric: %+v\n", metric)
w.WriteHeader(http.StatusInternalServerError)
}
}
func setENV() {
ENV = "DEV"
}
func loadConfig() {
var err error
Config, err = config.ReadDefault("app.conf")
if err != nil {
log.Fatalf("Error loading config. ERR: %+v", err)
}
}
func main() {
setENV()
loadConfig()
http.HandleFunc("/metric", metricHandler)
http.HandleFunc("/", handler)
fmt.Println("Listening on 6055...")
http.ListenAndServe(":6055", nil)
}