wip: log

debugframes/frames.go

@@ -7,7 +7,11 @@ type Trace struct {
 }
 
 func (t *Trace) Error() string {
-	return "[debug trace available]"
+	return ""
+}
+
+func (t *Trace) Trace() []string {
+	return nil
 }
 
 func GetTraces() error {

debugframes/panic.go

@@ -3,5 +3,5 @@ package debugframes
 type PanicTrace []byte
 
 func (p PanicTrace) Error() string {
-	return "[panic trace available]"
+	return ""
 }

log/errlog_test.go

@@ -0,0 +1,27 @@
+package log
+
+import (
+	"errors"
+	"github.com/rs/zerolog"
+	"testing"
+)
+
+func TestPrint(t *testing.T) {
+	Print("key", errors.New("hello world"))
+}
+
+type testWriter struct {
+}
+
+func (t testWriter) Write(b []byte) (int, error) {
+	return 0, errors.New("write error")
+}
+
+func TestErrWrite(t *testing.T) {
+	var (
+		tw     testWriter
+		logger zerolog.Logger
+	)
+	logger = zerolog.New(tw)
+	logger.Error().Str("test", "one").Msg("hello")
+}

log/file.go

@@ -7,17 +7,18 @@ import (
 	"github.com/spf13/viper"
 )
 
-type File struct {
+type File os.File
-	path string
-	file *os.File
-}
 
 const (
 	filenameKey = "file"
 )
 
 func NewLogFile(configKey string) (*File, error) {
-	var err error
+	var (
+		err  error
+		path string
+		file *os.File
+	)
 	if viper.IsSet(configKey) {
 		return nil, nil
 	}
@@ -27,22 +28,23 @@ func NewLogFile(configKey string) (*File, error) {
 		return nil, fmt.Errorf("missing file key config %s", fileKey)
 	}
 
-	file := &File{
+	path = viper.GetString(fileKey)
-		path: viper.GetString(fileKey),
+	if file, err = os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err != nil {
-	}
-	if file.file, err = os.OpenFile(file.path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err != nil {
 		return nil, err
 	}
 
-	return file, nil
+	return (*File)(file), nil
 }
 
 func (f *File) Write(b []byte) (int, error) {
-	return 0, nil
+	var file *os.File
+	file = (*os.File)(f)
+	return file.Write(b)
 }
 
 func (f *File) Close() error {
-	return f.file.Close()
+	of := (*os.File)(f)
+	return of.Close()
 }
 
 func (f *File) Rotate() error {

log/log.go

@@ -1,9 +1,10 @@
 package log
 
 import (
-	"os"
+	"fmt"
-
 	"github.com/rs/zerolog"
+	"io"
+	"os"
 )
 
 type Level zerolog.Level
@@ -15,6 +16,11 @@ type ProcessLogConfig interface {
 	FileName() string
 }
 
+type Traceable interface {
+	error
+	Trace() []string
+}
+
 const (
 	Trace Level = Level(zerolog.TraceLevel)
 	Debug Level = Level(zerolog.DebugLevel)
@@ -28,42 +34,41 @@ const (
 )
 
 var (
-	globalLevel Level = Error
+	globalLevel      Level = Error
-	logger      zerolog.Logger
+	logger           zerolog.Logger
+	onLogWriterError zerolog.Logger
+	writer           *Writer
+	DefaultOutlet    io.Writer
 )
 
 func init() {
+	DefaultOutlet = os.Stderr
+	writer = NewWriter()
+	logger = zerolog.New(writer)
+	onLogWriterError = logger.Output(DefaultOutlet)
 	SetGlobalLevel(globalLevel)
-	logger = zerolog.New(os.Stderr)
 }
 
 func (l Level) Print(a ...any) {
-	// var event *zerolog.Event
+	l.Fields(a...).Send()
-	// for _, i := range a {
-	// 	if event == nil {
-	// 		event = logger.WithLevel(zerolog.Level(l))
-	// 	}
-	// 	switch v := i.(type) {
-	// 	case daemon.ProcessLogEntry:
-	// 		event = event.Str("type", v.Descriptor.InstanceType().String()).Str("origin", "child process").
-	// 			Str("name", v.Descriptor.Name())
-	// 		if v.Descriptor.InstanceType() == daemon.Cron {
-	// 			event = event.Str("instance_name", v.Descriptor.InstanceName())
-	// 		}
-	// 		event.Str("entry", v.LogEntry).Send()
-	// 		event = nil
-	// 		//TODO: add logic to process cron or service specific log config
-	// 	}
-	// }
 }
 
-func (l Level) Fields(a ...any) *Payload {
+func (l Level) PrintTo(outlets []io.Writer, a ...any) {
+	l.Fields(a...).Send(outlets...)
+}
+
+func (l Level) Fields(a ...any) (p *Payload) {
+	p = (*Payload)(logger.WithLevel(zerolog.Level(l)).Timestamp())
+	return p.Fields(a...)
+}
+
+func (p *Payload) Fields(a ...any) *Payload {
 	var (
 		event *zerolog.Event
 		key   string
 	)
 
-	event = logger.WithLevel(zerolog.Level(l))
+	event = (*zerolog.Event)(p)
 	for i, part := range a {
 		if i%2 == 0 {
 			key = part.(string)
@@ -71,16 +76,39 @@ func (l Level) Fields(a ...any) *Payload {
 			switch v := part.(type) {
 			case string:
 				event = event.Str(key, v)
+			case error:
+				event = event.Err(v)
+
+			default:
+				event = event.Str(key, fmt.Sprintf("[no data type handle] %v", v))
 			}
 		}
 	}
-	return nil
+	return (*Payload)(event)
+}
+
+func (p *Payload) Send(ws ...io.Writer) {
+	event := (*zerolog.Event)(p)
+
+	writer.Lock()
+	defer writer.Unlock()
+
+	if len(ws) == 0 {
+		writer.Writers(DefaultOutlet)
+	} else {
+		writer.Writers(ws...)
+	}
+	event.Send()
 }
 
 func Print(a ...any) {
 	globalLevel.Print(a...)
 }
 
+func PrintTo(outlets []io.Writer, a ...any) {
+	globalLevel.PrintTo(outlets, a...)
+}
+
 func SetGlobalLevel(l Level) {
 	globalLevel = l
 	zerolog.SetGlobalLevel(zerolog.Level(globalLevel))

log/writer.go

@@ -1,31 +1,90 @@
 package log
 
 import (
+	"errors"
+	"fmt"
 	"io"
 	"sync"
 )
 
-type Writer struct {
+var (
-	writer io.Writer
+	noError = errors.New("no error")
-	mtx    *sync.Mutex
+	ec      = make(chan error)
-} //TODO: create a writer implementation using this struct, ensure sync and prevent abrupt truncation when stopping
+)
 
-func NewWriter(w io.Writer) *Writer {
+type Writer struct {
+	writers []io.Writer
+	mtx     *sync.Mutex
+}
+
+func NewWriter() *Writer {
 	return &Writer{
-		writer: w,
+		writers: make([]io.Writer, 0),
-		mtx:    &sync.Mutex{},
+		mtx:     &sync.Mutex{},
 	}
 }
 
 func (w *Writer) Write(b []byte) (int, error) {
-	w.mtx.Lock()
+	var (
-	defer w.mtx.Unlock()
+		ctr int
-	return w.writer.Write(b)
+		sw  io.Writer
-}
+		err error
+	)
 
-func (w *Writer) Close() {
+	for _, ww := range w.writers {
-	if wc, ok := w.writer.(io.WriteCloser); ok {
+		if ww == DefaultOutlet {
-		_ = wc.Close()
+			sw = ww
+		} else {
+			ctr++
+			go subWriter(ww, b, ec)
+		}
 	}
 
+	if sw != nil {
+		_, _ = sw.Write(b)
+	}
+
+	for i := 0; i < ctr; i++ {
+		if err = <-ec; err != noError {
+			onLogWriterError.Error().Err(err).Msg("subWriter error")
+		}
+	}
+
+	return len(b), nil
 }
+
+func (w *Writer) Lock() {
+	w.mtx.Lock()
+}
+
+func (w *Writer) Unlock() {
+	w.writers[0] = DefaultOutlet
+	w.writers = w.writers[:1]
+	w.mtx.Unlock()
+}
+
+func (w *Writer) Writers(ws ...io.Writer) {
+	if len(ws) == 0 {
+		w.writers[0] = DefaultOutlet
+		w.writers = w.writers[:1]
+	} else {
+		w.writers = append(w.writers, ws...)
+	}
+}
+
+func subWriter(w io.Writer, b []byte, errchan chan<- error) {
+	defer func() {
+		if o := recover(); o != nil {
+			errchan <- fmt.Errorf("subWriter panic: %v", o)
+		}
+	}()
+
+	if _, err := w.Write(b); err != nil {
+		errchan <- err
+	} else {
+		errchan <- noError
+	}
+}
+
+//func (w *Writer) Close() {
+//}