Added health check for redis connection

connection/connection.go

@@ -23,13 +23,26 @@ func OpenConnection() *RedisConnection {
 		log.Fatal(conn_err)
 	}
 
-	return &RedisConnection{conn}
+	c := &RedisConnection{conn}
+	go c.periodicKeepAlive()
+
+	return c
 }
 
 type RedisConnection struct {
 	redis.Conn
 }
 
+// Every minute send a Ping signal to redis so that we dont run into a timeout
+func (self *RedisConnection) periodicKeepAlive() {
+	c := time.Tick(1 * time.Minute)
+
+	for _ = range c {
+		_, err := self.Do("PING")
+		HandleErr(err)
+	}
+}
+
 func (self *RedisConnection) GetHost(name string) *Host {
 	host := Host{Hostname: name}
 

ddns.go

@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"github.com/gin-gonic/gin"
 	"github.com/pboehm/ddns/connection"
+	"html/template"
 	"log"
 	"net"
 	"net/http"
-	"html/template"
 	"os"
 	"strings"
 )
@@ -63,17 +63,17 @@ func RunWebService() {
 	conn := connection.OpenConnection()
 	defer conn.Close()
 
-	r := gin.Default()
-
 	// Add index template from bindata
 	index_content, err := Asset("templates/index.html")
 	HandleErr(err)
 
 	html, err := template.New("index.html").Parse(string(index_content))
 	HandleErr(err)
+
+	r := gin.Default()
 	r.HTMLTemplates = html
 
-    r.GET("/", func (g *gin.Context) {
+	r.GET("/", func(g *gin.Context) {
 		g.HTML(200, "index.html", nil)
 	})