refactor 1

gatherer/converter.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"strconv"
+	"strings"
+	"time"
+
+	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
+	"github.com/influxdata/influxdb-client-go/v2/api/write"
+	amqp "github.com/rabbitmq/amqp091-go"
+)
+
+func ShellyConverter(d amqp.Delivery) ([]*write.Point, error) {
+	log.Printf(" [x] %s: %s", d.RoutingKey, d.Body)
+	parts := strings.Split(d.RoutingKey, ".")
+	field := parts[len(parts)-1]
+	device := strings.Join(parts[1:len(parts)-1], ".")
+
+	// try to cast to float64
+	float_value, err := strconv.ParseFloat(string(d.Body), 64)
+
+	var values map[string]interface{}
+
+	if err == nil {
+		values = map[string]interface{}{
+			field: float_value,
+		}
+	} else {
+		values = map[string]interface{}{
+			field: string(d.Body),
+		}
+	}
+
+	return []*write.Point{influxdb2.NewPoint(
+		"shelly",
+		map[string]string{
+			"device": device,
+		},
+		values,
+		time.Now(),
+	)}, nil
+}
+
+func TasmotaConverter(d amqp.Delivery) ([]*write.Point, error) {
+	log.Printf(" [ ] %s: %s", d.RoutingKey, d.Body)
+	parts := strings.Split(d.RoutingKey, ".")
+	device := strings.Join(parts[1:len(parts)-1], ".")
+
+	// read body as json
+	var values map[string]interface{}
+	err := json.Unmarshal(d.Body, &values)
+	if err != nil {
+		return nil, err
+	}
+	var sensor_data map[string]interface{} = values["AM2301"].(map[string]interface{})
+
+	// get relevant values
+	relevant_values := map[string]interface{}{
+		"Temperature": sensor_data["Temperature"],
+		"Humidity":    sensor_data["Humidity"],
+		"DewPoint":    sensor_data["DewPoint"],
+	}
+
+	return []*write.Point{influxdb2.NewPoint(
+		"tasmota",
+		map[string]string{
+			"device": device,
+		},
+		relevant_values,
+		time.Now(),
+	)}, nil
+}

gatherer/main.go

@@ -1,17 +1,13 @@
 package main
 
 import (
-	"context"
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"log"
 	"os"
-	"strconv"
 	"strings"
 	"time"
 
-	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	amqp "github.com/rabbitmq/amqp091-go"
 )
 
@@ -64,17 +60,6 @@ func main() {
 	fmt.Println("InfluxDB token:")
 	fmt.Println(strings.TrimSpace(string(influx_token)))
 
-	// Create a new client using an InfluxDB server base URL and an authentication token
-	client := influxdb2.NewClient(
-		os.Getenv("INFLUX_URL"),
-		strings.TrimSpace(string(influx_token)),
-	)
-	// Use blocking write client for writes to desired bucket
-	writeAPI := client.WriteAPIBlocking(
-		os.Getenv("INFLUX_ORG"),
-		os.Getenv("INFLUX_BUCKET"),
-	)
-
 	var conn *amqp.Connection
 	amqp_url := os.Getenv("AMQP_URL")
 	for {
@@ -108,84 +93,23 @@ func main() {
 	shelly_msgs := create_and_connect_to_queue(ch, "shelly", "shellies.#")
 	tasmota_msgs := create_and_connect_to_queue(ch, "tasmota", "tele.#.SENSOR")
 
-	go func() {
-		for d := range shelly_msgs {
-			log.Printf(" [x] %s: %s", d.RoutingKey, d.Body)
-			parts := strings.Split(d.RoutingKey, ".")
-			field := parts[len(parts)-1]
-			device := strings.Join(parts[1:len(parts)-1], ".")
-
-			// try to cast to float64
-			float_value, err := strconv.ParseFloat(string(d.Body), 64)
-
-			var values map[string]interface{}
-
-			if err == nil {
-				values = map[string]interface{}{
-					field: float_value,
-				}
-			} else {
-				values = map[string]interface{}{
-					field: string(d.Body),
-				}
-			}
-
-			err = writeAPI.WritePoint(
-				context.Background(),
-				influxdb2.NewPoint(
-					"shelly",
-					map[string]string{
-						"device": device,
-					},
-					values,
-					time.Now(),
-				),
+	go RunPipe(
+		shelly_msgs,
+		os.Getenv("INFLUX_URL"),
+		strings.TrimSpace(string(influx_token)),
+		os.Getenv("INFLUX_ORG"),
+		os.Getenv("INFLUX_BUCKET"),
+		ShellyConverter,
 	)
-			if err != nil {
-				log.Printf("Failed to write point: %s", err)
-			}
-		}
-	}()
 
-	go func() {
-		for d := range tasmota_msgs {
-			log.Printf(" [ ] %s: %s", d.RoutingKey, d.Body)
-			parts := strings.Split(d.RoutingKey, ".")
-			device := strings.Join(parts[1:len(parts)-1], ".")
-
-			// read body as json
-			var values map[string]interface{}
-			err := json.Unmarshal(d.Body, &values)
-			if err != nil {
-				log.Printf("Failed to parse json: %s", err)
-				continue
-			}
-			var sensor_data map[string]interface{} = values["AM2301"].(map[string]interface{})
-
-			// get relevant values
-			relevant_values := map[string]interface{}{
-				"Temperature": sensor_data["Temperature"],
-				"Humidity":    sensor_data["Humidity"],
-				"DewPoint":    sensor_data["DewPoint"],
-			}
-
-			err = writeAPI.WritePoint(
-				context.Background(),
-				influxdb2.NewPoint(
-					"tasmota",
-					map[string]string{
-						"device": device,
-					},
-					relevant_values,
-					time.Now(),
-				),
+	go RunPipe(
+		tasmota_msgs,
+		os.Getenv("INFLUX_URL"),
+		strings.TrimSpace(string(influx_token)),
+		os.Getenv("INFLUX_ORG"),
+		os.Getenv("INFLUX_BUCKET"),
+		TasmotaConverter,
 	)
-			if err != nil {
-				log.Printf("Failed to write point: %s", err)
-			}
-
-		}
-	}()
 
 	log.Printf(" [*] Waiting for logs. To exit press CTRL+C")
 	<-forever

gatherer/piper.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
+	"github.com/influxdata/influxdb-client-go/v2/api/write"
+	amqp "github.com/rabbitmq/amqp091-go"
+)
+
+func RunPipe(
+	channel <-chan amqp.Delivery,
+	url string, token string,
+	org string, bucket string,
+	conversion func(amqp.Delivery) ([]*write.Point, error),
+) {
+	// Create a new client using an InfluxDB server base URL and an authentication token
+	client := influxdb2.NewClient(
+		url, token,
+	)
+	// Get blocking write client
+	writeAPI := client.WriteAPIBlocking(org, bucket)
+	// Create point using fluent style
+	for msg := range channel {
+		points, _ := conversion(msg)
+		// Write data
+		err := writeAPI.WritePoint(context.Background(), points...)
+		if err != nil {
+			fmt.Printf("Write error: %s", err.Error())
+			// reset writeAPI
+			writeAPI.Flush(context.Background())
+			writeAPI = client.WriteAPIBlocking(org, bucket)
+		}
+	}
+
+}