package logger import ( "context" "fmt" "os" "sort" "sync" "time" dlog "github.com/micro/go-micro/v2/debug/log" ) type defaultLogger struct { sync.RWMutex opts Options } // Init(opts...) should only overwrite provided options func (l *defaultLogger) Init(opts ...Option) error { for _, o := range opts { o(&l.opts) } return nil } func (l *defaultLogger) String() string { return "default" } func (l *defaultLogger) Fields(fields map[string]interface{}) Logger { l.Lock() l.opts.Fields = copyFields(fields) l.Unlock() return l } func copyFields(src map[string]interface{}) map[string]interface{} { dst := make(map[string]interface{}, len(src)) for k, v := range src { dst[k] = v } return dst } func (l *defaultLogger) Log(level Level, v ...interface{}) { // TODO decide does we need to write message if log level not used? if !l.opts.Level.Enabled(level) { return } l.RLock() fields := copyFields(l.opts.Fields) l.RUnlock() fields["level"] = level.String() rec := dlog.Record{ Timestamp: time.Now(), Message: fmt.Sprint(v...), Metadata: make(map[string]string, len(fields)), } keys := make([]string, 0, len(fields)) for k, v := range fields { keys = append(keys, k) rec.Metadata[k] = fmt.Sprintf("%v", v) } sort.Strings(keys) metadata := "" for _, k := range keys { metadata += fmt.Sprintf(" %s=%v", k, fields[k]) } dlog.DefaultLog.Write(rec) t := rec.Timestamp.Format("2006-01-02 15:04:05") fmt.Printf("%s %s %v\n", t, metadata, rec.Message) } func (l *defaultLogger) Logf(level Level, format string, v ...interface{}) { // TODO decide does we need to write message if log level not used? if level < l.opts.Level { return } l.RLock() fields := copyFields(l.opts.Fields) l.RUnlock() fields["level"] = level.String() rec := dlog.Record{ Timestamp: time.Now(), Message: fmt.Sprintf(format, v...), Metadata: make(map[string]string, len(fields)), } keys := make([]string, 0, len(fields)) for k, v := range fields { keys = append(keys, k) rec.Metadata[k] = fmt.Sprintf("%v", v) } sort.Strings(keys) metadata := "" for _, k := range keys { metadata += fmt.Sprintf(" %s=%v", k, fields[k]) } dlog.DefaultLog.Write(rec) t := rec.Timestamp.Format("2006-01-02 15:04:05") fmt.Printf("%s %s %v\n", t, metadata, rec.Message) } func (n *defaultLogger) Options() Options { return n.opts } // NewLogger builds a new logger based on options func NewLogger(opts ...Option) Logger { // Default options options := Options{ Level: InfoLevel, Fields: make(map[string]interface{}), Out: os.Stderr, Context: context.Background(), } l := &defaultLogger{opts: options} if err := l.Init(opts...); err != nil { l.Log(FatalLevel, err) } return l }