Implement continuous Python Daemon

1 files changed, 30 insertions, 8 deletions

diff --git a/src/main.go b/src/main.go
index 3218df9..dcb201e 100644
--- a/src/main.go
+++ b/src/main.go
@@ -4,11 +4,19 @@ package main
 
 import (
 	"log"
+	"os"
+	"os/signal"
+	"syscall"
 )
 
 var (
 	config RuntimeConfig
 	camera Camera
+	ipc IpcServer
+)
+
+const (
+	IPC_SOCKET = "/tmp/birdscan.sock"  // FIXME
 )
 
 func main() {
@@ -19,13 +27,27 @@ func main() {
 	// parse flags and read config
 	config = GetRuntimeConfig()
 
-	// create camera
-	camera = NewCamera()
-
-	// start goroutines
-	server := NewWebServer()
-	go server.run()  // http server / user interface
-
-	// run camera
+	// create services
+	camera = NewCamera()   // main service
+	ipc = NewIpcServer()   // inter process communication
+	web := NewWebServer()  // web frontend
+
+	// allow graceful exit
+	var listener = make(chan os.Signal)
+	signal.Notify(listener, syscall.SIGTERM)
+	signal.Notify(listener, syscall.SIGINT)
+	go func() {
+		signal := <-listener
+		log.Printf("Got signal '%+v'", signal)
+		ipc.Cleanup()
+		os.Exit(0)
+	}()
+
+	// start secondary services
+	go ipc.Run(IPC_SOCKET)
+	go PicameraSubprocess(IPC_SOCKET)  // subprocess to use Python picamera
+	go web.run()
+
+	// start main service
 	camera.run()
 }