// Performs all operations required to close this app.
// Closes the network resource, queues a new STATUS_DOWN,
// removes from the registry, and logs the close.
func closeApp(a *app.App) {
// this really should be somewhere else in the code, but i can't figure out where
// since most places would lead to circular references
a.Connection.Close()
if a.Manifest != nil {
cmd.ChangeAppStatus(a, app.STATUS_DOWN, 0)
registry.Remove(a)
logging.Info("Closing application %s", a.Manifest.InstanceId)
} else {
logging.Info("Closing application")
}
}
// change the app's status and notify all those that depend on this app
func (c *commandStrategy) statusChange() error {
var newStatus int
priority := -1
switch c.verb {
case "APP_UP":
newStatus = app.STATUS_UP
case "APP_DOWN":
newStatus = app.STATUS_DOWN
case "APP_IN_USE":
newStatus = app.STATUS_IN_USE
default:
return errors.New("Unrecognized status verb")
}
if c.app.Status != newStatus {
c.app.RWMutex.Lock()
c.app.Status = newStatus
c.app.Priority = priority
if c.app.Manifest != nil {
logging.Info("Changing status of %s to '%s'\n", c.app.Manifest.InstanceId, c.app.StatusString())
sendDependencyNotice(c.app)
}
c.app.RWMutex.Unlock()
}
return nil
}
// main parses command-line arguments and spawns a new server
func main() {
logging.SetLevel(logging.DEBUG)
no_tls := flag.Bool("no-tls", false, "Whether to use TLS, default false")
crt_path := flag.String("crt", "cert.crt", "Path to the TLS certificate, default `cert.crt`")
key_path := flag.String("key", "key.key", "Path to the TLS key, default `key.key`")
sname := flag.String("srv-name", "mycroft", "This server's name for SNI")
flag.Parse()
logging.Info("Starting Server ...")
if *no_tls {
logging.Warning("not using TLS")
err := srv.StartListen(1847, false, "", "", "")
if err != nil {
logging.Fatal("Could not start server: ", err.Error())
}
} else {
err := srv.StartListen(1847, true, *crt_path, *key_path, *sname)
if err != nil {
logging.Fatal("Could not start server: ", err.Error())
}
}
}
// construct the app based on its manifest
func (c *commandStrategy) appManifest() bool {
c.app.RWMutex.Lock()
defer c.app.RWMutex.Unlock()
logging.Debug("Parsing application's manifest")
man, err := decodeManifest(c.body)
if err != nil {
logging.Error("App's manifest is invalid: %s", err)
sendManifestFail(c.app, err.Error())
return false
}
if _, exists := registry.GetInstance(man.InstanceId); exists {
logging.Error("App's instance id is already taken: %s", man.InstanceId)
sendManifestFail(c.app, fmt.Sprintf("instanceId %s is in use", man.InstanceId))
return false
}
c.app.Status = app.STATUS_DOWN
c.app.Manifest = man
registry.Register(c.app)
sendManifestOkAndDependencies(c.app)
logging.Info("App '%s' now connected with manifest parsed", c.app.Manifest.InstanceId)
return true
}