func main() {
flag.Parse() // required, to set up the proper glog configuration
flow.LoadConfig(defaults, *config)
flow.DontPanic()
// register more definitions from a JSON-formatted setup file, if specified
if s := flow.Config["SETUP_FILE"]; s != "" {
if err := flow.AddToRegistry(s); err != nil {
panic(err)
}
}
// if a registered circuit name is given on the command line, run it
if flag.NArg() > 0 {
if factory, ok := flow.Registry[flag.Arg(0)]; ok {
factory().Run()
return
}
fmt.Fprintln(os.Stderr, "Unknown command:", flag.Arg(0))
os.Exit(1)
}
fmt.Printf("Starting webserver for http://%s/\n", flow.Config["HTTP_PORT"])
// normal startup: save config info in database and start the webserver
c := flow.NewCircuit()
// database setup, save current config settings, register init gadget
c.Add("db", "LevelDB")
c.Feed("db.In", flow.Tag{"<clear>", "/config/"})
c.Feed("db.In", flow.Tag{"/config/appName", "JeeBus"})
c.Feed("db.In", flow.Tag{"/config/configFile", *config})
for k, v := range flow.Config {
c.Feed("db.In", flow.Tag{"/config/" + k, v})
}
c.Feed("db.In", flow.Tag{"<register>", "/gadget/init"})
// wait for db to finish, then dispatch to the "init" gadget, if found
c.Add("wait", "Waiter")
c.Add("disp", "Dispatcher")
c.Connect("db.Out", "wait.Gate", 0)
c.Connect("wait.Out", "disp.In", 0)
c.Feed("wait.In", flow.Tag{"<dispatch>", "init"})
// webserver setup
c.Add("http", "HTTPServer")
c.Feed("http.Handlers", flow.Tag{"/", flow.Config["APP_DIR"]})
c.Feed("http.Handlers", flow.Tag{"/base/", flow.Config["BASE_DIR"]})
c.Feed("http.Handlers", flow.Tag{"/ws", "<websocket>"})
// start the ball rolling, keep running forever
c.Add("forever", "Forever")
c.Run()
}
func main() {
flag.Parse()
err := flow.AddToRegistry(*setupFile)
if err != nil && !*verbose {
glog.Fatal(err)
}
if *verbose {
fmt.Println("Flow", flow.Version, "\n")
flow.PrintRegistry()
fmt.Println("\nDocumentation at http://godoc.org/github.com/jcw/flow")
} else {
glog.Infof("Flow %s - starting, registry size %d",
flow.Version, len(flow.Registry))
if factory, ok := flow.Registry[*appMain]; ok {
factory().Run()
} else {
glog.Fatalln(*appMain, "not found in:", *setupFile)
}
glog.Infof("Flow %s -, normal exit", flow.Version)
}
}
func main() {
flag.Parse() // required, to set up the proper glog configuration
flow.LoadConfig(defaults, *config)
// register more definitions from a JSON-formatted setup file, if specified
if s := flow.Config["SETUP_FILE"]; s != "" {
if err := flow.AddToRegistry(s); err != nil {
panic(err)
}
}
// if a registered circuit name is given on the command line, run it
if flag.NArg() > 0 {
if factory, ok := flow.Registry[flag.Arg(0)]; ok {
factory().Run()
return
}
fmt.Fprintln(os.Stderr, "Unknown command:", flag.Arg(0))
os.Exit(1)
}
glog.Infof("Starting webserver for http://%s/\n", flow.Config["HTTP_PORT"])
// show intro page via a static webserver if the main app dir is absent
fd, err := os.Open(flow.Config["APP_DIR"])
if err != nil {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(introPage))
})
panic(http.ListenAndServe(flow.Config["HTTP_PORT"], nil))
}
fd.Close()
// normal startup: save config info in database and start the webserver
c := flow.NewCircuit()
flow.DontPanic(c)
// database setup, save current config settings, register init gadget
c.Add("db", "LevelDB")
c.Feed("db.In", flow.Tag{"<clear>", "/config/"})
c.Feed("db.In", flow.Tag{"/config/appName", "HouseMon"})
c.Feed("db.In", flow.Tag{"/config/version", VERSION})
c.Feed("db.In", flow.Tag{"/config/buildDate", BUILD_DATE})
c.Feed("db.In", flow.Tag{"/config/configFile", *config})
for k, v := range flow.Config {
c.Feed("db.In", flow.Tag{"/config/" + k, v})
}
c.Feed("db.In", flow.Tag{"<register>", "/gadget/init"})
// wait for db to finish, then dispatch to the "init" gadget, if found
c.Add("wait", "Waiter")
c.Add("disp", "Dispatcher")
c.Connect("db.Out", "wait.Gate", 0)
c.Connect("wait.Out", "disp.In", 0)
c.Feed("wait.In", flow.Tag{"<dispatch>", "init"})
// webserver setup
c.Add("http", "HTTPServer")
c.Add("asink", "Sink")
c.Connect("http.Out", "asink.In", 0)
c.Feed("http.Handlers", flow.Tag{"DefaultMux", true})
c.Feed("http.Handlers", flow.Tag{"/", flow.Config["APP_DIR"]})
c.Feed("http.Handlers", flow.Tag{"/base/", flow.Config["BASE_DIR"]})
c.Feed("http.Handlers", flow.Tag{"/ws", "<websocket>"})
// start the ball rolling, keep running forever
c.Add("forever", "Forever")
c.Run()
}