func main() {
flag.Parse()
mdbChannel := mdb.StartMdbDaemon(path.Join(*stateDir, "mdb"))
interval, _ := time.ParseDuration(fmt.Sprintf("%ds", *minInterval))
var fleet fleet.Fleet
for {
minCycleStopTime := time.Now().Add(interval)
select {
case mdb := <-mdbChannel:
fleet.MdbUpdate(mdb)
if *debug {
b, _ := json.Marshal(mdb)
var out bytes.Buffer
json.Indent(&out, b, "", " ")
fmt.Println()
out.WriteTo(os.Stdout)
fmt.Println()
}
default:
// Do work.
fleet.PollNextSub()
}
fmt.Print(".")
runtime.GC() // An opportune time to take out the garbage.
time.Sleep(minCycleStopTime.Sub(time.Now()))
}
}
func main() {
flag.Parse()
if os.Geteuid() == 0 {
fmt.Fprintln(os.Stderr, "Do not run the Dominator as root")
os.Exit(1)
}
fi, err := os.Lstat(*stateDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot stat: %s\t%s\n", *stateDir, err)
os.Exit(1)
}
if !fi.IsDir() {
fmt.Fprintf(os.Stderr, "%s is not a directory\n", *stateDir)
os.Exit(1)
}
interval := time.Duration(*minInterval) * time.Second
circularBuffer := logbuf.New(*logbufLines)
logger := log.New(circularBuffer, "", log.LstdFlags)
mdbChannel := mdb.StartMdbDaemon(path.Join(*stateDir, "mdb"), logger)
herd := herd.NewHerd(fmt.Sprintf("%s:%d", *imageServerHostname,
*imageServerPortNum), logger)
herd.AddHtmlWriter(circularBuffer)
if err = herd.StartServer(*portNum, true); err != nil {
fmt.Fprintf(os.Stderr, "Unable to create http server\t%s\n", err)
os.Exit(1)
}
nextCycleStopTime := time.Now().Add(interval)
for {
select {
case mdb := <-mdbChannel:
herd.MdbUpdate(mdb)
if *debug {
showMdb(mdb)
}
runtime.GC() // An opportune time to take out the garbage.
default:
// Do work.
if herd.PollNextSub() {
if *debug {
fmt.Print(".")
}
sleepTime := nextCycleStopTime.Sub(time.Now())
time.Sleep(sleepTime)
nextCycleStopTime = time.Now().Add(interval)
if sleepTime < 0 { // There was no time to rest.
runtime.GC() // An opportune time to take out the garbage.
}
}
}
}
}