func ExampleLogger_ToConsole() {
// Simply log to console.
ol.Info.Println(nil, "The log text.")
ol.Trace.Println(nil, "The log text.")
ol.Warn.Println(nil, "The log text.")
ol.Error.Println(nil, "The log text.")
// Use short aliases.
ol.I(nil, "The log text.")
ol.T(nil, "The log text.")
ol.W(nil, "The log text.")
ol.E(nil, "The log text.")
}
// http standard error response.
// @remark for not SystemError, we will use logger.E to print it.
// @remark user can use WriteError() for simple api.
func Error(ctx ol.Context, err error) http.Handler {
// for complex error, use code instead.
if v, ok := err.(SystemComplexError); ok {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ol.E(ctx, "Serve", r.URL, "failed. err is", err.Error())
jsonHandler(ctx, v).ServeHTTP(w, r)
})
}
// for int error, use code instead.
if v, ok := err.(SystemError); ok {
return jsonHandler(ctx, map[string]int{"code": int(v)})
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
SetHeader(w)
w.Header().Set("Content-Type", HttpJson)
// unknown error, log and response detail
http.Error(w, err.Error(), http.StatusInternalServerError)
ol.E(ctx, "Serve", r.URL, "failed. err is", err.Error())
})
}
func (v *aspContextNoExit) WatchParent() {
ppid := os.Getppid()
go func() {
for {
if pid := os.Getppid(); pid == 1 || pid != ppid {
ol.E(v.ctx, "quit for parent problem, ppid is", pid)
select {
case v.quit <- true:
default:
}
break
}
//ol.T(v.ctx, "parent pid", ppid, "ok")
time.Sleep(v.interval)
}
}()
ol.T(v.ctx, "parent process watching, ppid is", ppid)
}
func (v *aspContext) WatchParent() {
ppid := os.Getppid()
go func() {
for {
if pid := os.Getppid(); pid == 1 || pid != ppid {
ol.E(v.ctx, "quit for parent problem, ppid is", pid)
if v.callback != nil {
v.callback()
}
os.Exit(0)
}
//ol.T(v.ctx, "parent pid", ppid, "ok")
time.Sleep(v.interval)
}
}()
ol.T(v.ctx, "parent process watching, ppid is", ppid)
}