func main() {
flag.Parse()
if *domain == "" {
flag.PrintDefaults()
os.Exit(1)
}
analysis, err := debugger.Analyze(*domain)
if err != nil {
log.Fatal(err)
}
fmt.Print(analysis)
if analysis.Status() != debugger.OK {
os.Exit(1)
}
}
func main() {
flag.Parse()
if *flagDomain == "" || *flagFrom == "" || *flagTo == "" {
flag.PrintDefaults()
os.Exit(1)
}
var state debugger.Status
var warnings int
for ; ; time.Sleep(*flagDuration) {
var result debugger.Status
var details string
analysis, err := debugger.Analyze(*flagDomain)
if err != nil {
log.Printf("[Analyze (%s)] Error: %v", state, err)
result = debugger.WARNING
details = err.Error()
} else {
log.Printf("[Analyze (%s)] Status: %s", state, analysis.Status())
result = analysis.Status()
details = analysis.String()
}
/*
State machine:
+----> OK <--+
v v
WARNING ------> ERROR
- 3 successive warnings becomes an error
- transitions in or out of error state generates an alert
*/
var newState debugger.Status
switch state {
case debugger.OK:
switch result {
case debugger.WARNING:
newState = debugger.WARNING
case debugger.ERROR:
newState = debugger.ERROR
}
case debugger.WARNING:
switch result {
case debugger.OK:
newState = debugger.OK
warnings = 0
case debugger.WARNING:
warnings++
if warnings > 3 {
newState = debugger.ERROR
warnings = 0
}
case debugger.ERROR:
newState = debugger.ERROR
warnings = 0
}
case debugger.ERROR:
switch result {
case debugger.OK:
newState = debugger.OK
}
}
if state == newState {
continue
}
if state == debugger.ERROR || newState == debugger.ERROR {
log.Printf("[Analyze (%s)] New state: %s", state, newState)
if err := email(newState.String(), details); err != nil {
log.Print(err)
}
}
state = newState
}
}
