From 0c2fd3066e775b5a8ef7360055d83416ac3022d5 Mon Sep 17 00:00:00 2001
From: Paulo Truta <pinheirotruta5@gmail.com>
Date: Thu, 11 Feb 2021 19:56:35 +0100
Subject: [PATCH] Fixed Dockerfile and compose files for auto re-build, added
 loop for system service behaviour

---
 .gitignore         |  1 +
 Dockerfile         |  2 +-
 docker-compose.yml |  2 --
 main.go            | 61 ++++++++++++++++++++++++++++++++++++----------
 4 files changed, 50 insertions(+), 16 deletions(-)

diff --git a/.gitignore b/.gitignore
index 66fd13c..525ab5b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 *.dll
 *.so
 *.dylib
+main
 
 # Test binary, built with `go test -c`
 *.test
diff --git a/Dockerfile b/Dockerfile
index 76d3cff..d617d40 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,4 +8,4 @@ RUN go mod download
 
 RUN go get github.com/githubnemo/CompileDaemon
 
-ENTRYPOINT CompileDaemon --build="go build main.go" --command=./runsysctl
\ No newline at end of file
+ENTRYPOINT CompileDaemon --build="go build main.go" --command=./main
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 1ef87a3..e04a675 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,5 +4,3 @@ services:
     build: ./
     volumes:
       - ./:/app
-  edgebox-queue:
-    image: redis-alpine
\ No newline at end of file
diff --git a/main.go b/main.go
index dd87d32..7d1d515 100644
--- a/main.go
+++ b/main.go
@@ -1,20 +1,55 @@
 package main
 
 import (
-    "fmt"
-    "github.com/go-redis/redis/v8"
+	"flag"
+	"log"
+	"os"
+	"os/signal"
+	"time"
+	//"syscall"
 )
 
 func main() {
 
-	fmt.Println("Hello World")
-	
-	// client := redis.NewClient(&redis.Options{
-    //     Addr:     "edgebox-queue:6379",
-    //     Password: "", // no password set
-    //     DB:       0,  // use default DB
-    // })
-    // pong, err := client.Ping().Result()
-	// fmt.Println(pong, err)
-	
-}
\ No newline at end of file
+	// load command line arguments
+
+	name := flag.String("name", "edgebox", "name for the service")
+
+	flag.Parse()
+
+	log.Printf("Starting Sysctl service for %s", *name)
+
+	// setup signal catching
+	sigs := make(chan os.Signal, 1)
+
+	// catch all signals since not explicitly listing
+	signal.Notify(sigs)
+
+	// Cathing specific signals can be done with:
+	//signal.Notify(sigs,syscall.SIGQUIT)
+
+	// method invoked upon seeing signal
+	go func() {
+		s := <-sigs
+		log.Printf("RECEIVED SIGNAL: %s", s)
+		AppCleanup()
+		os.Exit(1)
+	}()
+
+	// infinite loop
+	for {
+
+		log.Printf("Executing instruction %s", *name)
+
+		// wait random number of milliseconds
+		Nsecs := 1000
+		log.Printf("Next instruction executed in %dms", Nsecs)
+		time.Sleep(time.Millisecond * time.Duration(Nsecs))
+	}
+
+}
+
+// AppCleanup : cleanup app state before exit
+func AppCleanup() {
+	log.Println("Cleaning up app status before exit")
+}