func (ws *windowsService) SystemLogger(errs chan<- error) (Logger, error) {
el, err := eventlog.Open(ws.Name)
if err != nil {
return nil, err
}
return WindowsLogger{el, errs}, nil
}
func TestLog(t *testing.T) {
const name = "mylog"
const supports = eventlog.Error | eventlog.Warning | eventlog.Info
err := eventlog.InstallAsEventCreate(name, supports)
if err != nil {
t.Fatalf("Install failed: %s", err)
}
l, err := eventlog.Open(name)
if err != nil {
t.Fatalf("Open failed: %s", err)
}
defer l.Close()
err = l.Info(1, "info")
if err != nil {
t.Fatalf("Info failed: %s", err)
}
err = l.Warning(2, "warning")
if err != nil {
t.Fatalf("Warning failed: %s", err)
}
err = l.Error(3, "error")
if err != nil {
t.Fatalf("Error failed: %s", err)
}
err = eventlog.Remove(name)
if err != nil {
t.Fatalf("Remove failed: %s", err)
}
}
func (this *Service) RemoveService() error {
l, err := eventlog.Open(this.name)
if err != nil {
return fmt.Errorf("Cannot open eventlog")
}
m, err := mgr.Connect()
if err != nil {
l.Error(3, fmt.Sprintf("remove service: cannot connect to windows service manager.", err))
return err
}
defer m.Disconnect()
s, err := m.OpenService(this.name)
if err != nil {
l.Error(3, fmt.Sprintf("remove service: service %s doesn't exists", this.name))
return fmt.Errorf("service %s doesn't exists", this.name)
}
err = s.Delete()
if err != nil {
return err
}
l.Info(1, "Service Removed. removing event log")
l.Close()
eventlog.Remove(this.name)
return nil
}
func (this *Service) InstallService() error {
// open logger
elog, err := eventlog.Open(this.name)
if err != nil {
// install logger
err = eventlog.InstallAsEventCreate(this.name, eventlog.Error|eventlog.Warning|eventlog.Info)
if err != nil {
return fmt.Errorf("SetupEventLogSource() failed: %s", err)
}
// open
elog, err = eventlog.Open(this.name)
if err != nil {
return fmt.Errorf("Cannot open eventlog")
}
}
defer elog.Close()
m, err := mgr.Connect()
if err != nil {
elog.Error(3, fmt.Sprintf("install service: cannot connect to windows service manager.", err))
return err
}
defer m.Disconnect()
s, err := m.OpenService(this.name)
if err == nil {
s.Close()
elog.Error(3, fmt.Sprintf("install service: service %s already exists", this.name))
return fmt.Errorf("service %s already exists", this.name)
}
s, err = m.CreateService(this.name, this.path, mgr.Config{DisplayName: this.desc})
if err != nil {
elog.Error(3, fmt.Sprintf("install service: Failed to create service: %v", err))
return err
}
defer s.Close()
err = this.ConfigServiceAutoStart()
if err != nil {
elog.Error(3, fmt.Sprintf("install service: cannot set service to auto start: %v", err))
return err
}
return nil
}
func (ws *windowsService) Run(onStart, onStop func() error) error {
elog, err := eventlog.Open(ws.name)
if err != nil {
return err
}
defer elog.Close()
ws.logger = elog
ws.onStart = onStart
ws.onStop = onStop
return svc.Run(ws.name, ws)
}
func main() {
elog, err := eventlog.Open(name)
if err != nil {
log.Fatal(err.Error())
}
defer elog.Close()
// `svc.Run` blocks until windows service will stopped.
// ref. https://msdn.microsoft.com/library/cc429362.aspx
err = svc.Run(name, &handler{elog: elog})
if err != nil {
log.Fatal(err.Error())
}
}
// initEventlog creates a connection to event logs and stores the handler in ctx
func initEventlog(orig_logctx Logging, progname string) (logctx Logging, err error) {
logctx = orig_logctx
defer func() {
if e := recover(); e != nil {
err = fmt.Errorf("mig.initEventlog() -> %v", e)
}
}()
const name = "mylog"
const supports = eventlog.Error | eventlog.Warning | eventlog.Info
err = eventlog.InstallAsEventCreate(name, supports)
if err != nil {
panic(err)
}
logctx.fd, err = eventlog.Open(progname)
if err != nil {
panic(err)
}
return
}
func queryService(name string, fn func(s *mgr.Service, l *eventlog.Log) (State, error)) (State, error) {
l, err := eventlog.Open(name)
if err != nil {
return State(Unknown), fmt.Errorf("Cannot open eventlog")
}
defer l.Close()
m, err := mgr.Connect()
if err != nil {
l.Error(3, fmt.Sprintf("cannot connect to mgr: %v", err))
return State(Unknown), err
}
defer m.Disconnect()
s, err := m.OpenService(name)
if err != nil {
l.Error(3, fmt.Sprintf("cannot open service: %v", err))
return State(Unknown), fmt.Errorf("service %s is not installed", name)
}
defer s.Close()
return fn(s, l)
}
func runService(name string, isDebug bool) {
var err error
if isDebug {
elog = debug.New(name)
} else {
elog, err = eventlog.Open(name)
if err != nil {
return
}
}
defer elog.Close()
elog.Info(1, fmt.Sprintf("starting %s service", name))
run := svc.Run
if isDebug {
run = debug.Run
}
err = run(name, &myservice{})
if err != nil {
elog.Error(1, fmt.Sprintf("%s service failed: %v", name, err))
return
}
elog.Info(1, fmt.Sprintf("%s service stopped", name))
}
