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writer.go
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writer.go
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package logx
import (
"encoding/json"
"fmt"
"io"
"log"
"os"
"path"
"strings"
"sync"
"sync/atomic"
"github.com/zeromicro/go-zero/core/color"
)
type (
Writer interface {
Alert(v interface{})
Close() error
Error(v interface{}, fields ...LogField)
Info(v interface{}, fields ...LogField)
Severe(v interface{})
Slow(v interface{}, fields ...LogField)
Stack(v interface{})
Stat(v interface{}, fields ...LogField)
}
atomicWriter struct {
writer Writer
lock sync.RWMutex
}
concreteWriter struct {
infoLog io.WriteCloser
errorLog io.WriteCloser
severeLog io.WriteCloser
slowLog io.WriteCloser
statLog io.WriteCloser
stackLog io.Writer
}
)
// NewWriter creates a new Writer with the given io.Writer.
func NewWriter(w io.Writer) Writer {
lw := newLogWriter(log.New(w, "", flags))
return &concreteWriter{
infoLog: lw,
errorLog: lw,
severeLog: lw,
slowLog: lw,
statLog: lw,
stackLog: lw,
}
}
func (w *atomicWriter) Load() Writer {
w.lock.RLock()
defer w.lock.RUnlock()
return w.writer
}
func (w *atomicWriter) Store(v Writer) {
w.lock.Lock()
w.writer = v
w.lock.Unlock()
}
func (w *atomicWriter) Swap(v Writer) Writer {
w.lock.Lock()
old := w.writer
w.writer = v
w.lock.Unlock()
return old
}
func newConsoleWriter() Writer {
outLog := newLogWriter(log.New(os.Stdout, "", flags))
errLog := newLogWriter(log.New(os.Stderr, "", flags))
return &concreteWriter{
infoLog: outLog,
errorLog: errLog,
severeLog: errLog,
slowLog: errLog,
stackLog: newLessWriter(errLog, options.logStackCooldownMills),
statLog: outLog,
}
}
func newFileWriter(c LogConf) (Writer, error) {
var err error
var opts []LogOption
var infoLog io.WriteCloser
var errorLog io.WriteCloser
var severeLog io.WriteCloser
var slowLog io.WriteCloser
var statLog io.WriteCloser
var stackLog io.Writer
if len(c.Path) == 0 {
return nil, ErrLogPathNotSet
}
opts = append(opts, WithCooldownMillis(c.StackCooldownMillis))
if c.Compress {
opts = append(opts, WithGzip())
}
if c.KeepDays > 0 {
opts = append(opts, WithKeepDays(c.KeepDays))
}
accessFile := path.Join(c.Path, accessFilename)
errorFile := path.Join(c.Path, errorFilename)
severeFile := path.Join(c.Path, severeFilename)
slowFile := path.Join(c.Path, slowFilename)
statFile := path.Join(c.Path, statFilename)
handleOptions(opts)
setupLogLevel(c)
if infoLog, err = createOutput(accessFile); err != nil {
return nil, err
}
if errorLog, err = createOutput(errorFile); err != nil {
return nil, err
}
if severeLog, err = createOutput(severeFile); err != nil {
return nil, err
}
if slowLog, err = createOutput(slowFile); err != nil {
return nil, err
}
if statLog, err = createOutput(statFile); err != nil {
return nil, err
}
stackLog = newLessWriter(errorLog, options.logStackCooldownMills)
return &concreteWriter{
infoLog: infoLog,
errorLog: errorLog,
severeLog: severeLog,
slowLog: slowLog,
statLog: statLog,
stackLog: stackLog,
}, nil
}
func (w *concreteWriter) Alert(v interface{}) {
output(w.errorLog, levelAlert, v)
}
func (w *concreteWriter) Close() error {
if err := w.infoLog.Close(); err != nil {
return err
}
if err := w.errorLog.Close(); err != nil {
return err
}
if err := w.severeLog.Close(); err != nil {
return err
}
if err := w.slowLog.Close(); err != nil {
return err
}
return w.statLog.Close()
}
func (w *concreteWriter) Error(v interface{}, fields ...LogField) {
output(w.errorLog, levelError, v, fields...)
}
func (w *concreteWriter) Info(v interface{}, fields ...LogField) {
output(w.infoLog, levelInfo, v, fields...)
}
func (w *concreteWriter) Severe(v interface{}) {
output(w.severeLog, levelFatal, v)
}
func (w *concreteWriter) Slow(v interface{}, fields ...LogField) {
output(w.slowLog, levelSlow, v, fields...)
}
func (w *concreteWriter) Stack(v interface{}) {
output(w.stackLog, levelError, v)
}
func (w *concreteWriter) Stat(v interface{}, fields ...LogField) {
output(w.statLog, levelStat, v, fields...)
}
type nopWriter struct{}
func (n nopWriter) Alert(_ interface{}) {
}
func (n nopWriter) Close() error {
return nil
}
func (n nopWriter) Error(_ interface{}, _ ...LogField) {
}
func (n nopWriter) Info(_ interface{}, _ ...LogField) {
}
func (n nopWriter) Severe(_ interface{}) {
}
func (n nopWriter) Slow(_ interface{}, _ ...LogField) {
}
func (n nopWriter) Stack(_ interface{}) {
}
func (n nopWriter) Stat(_ interface{}, _ ...LogField) {
}
func buildFields(fields ...LogField) []string {
var items []string
for _, field := range fields {
items = append(items, fmt.Sprintf("%s=%v", field.Key, field.Value))
}
return items
}
func output(writer io.Writer, level string, val interface{}, fields ...LogField) {
fields = append(fields, Field(callerKey, getCaller(callerDepth)))
switch atomic.LoadUint32(&encoding) {
case plainEncodingType:
level = wrapLevelWithColor(level)
writePlainAny(writer, level, val, buildFields(fields...)...)
default:
entry := make(logEntryWithFields)
for _, field := range fields {
entry[field.Key] = field.Value
}
entry[timestampKey] = getTimestamp()
entry[levelKey] = level
entry[contentKey] = val
writeJson(writer, entry)
}
}
func wrapLevelWithColor(level string) string {
var colour color.Color
switch level {
case levelAlert:
colour = color.FgRed
case levelError:
colour = color.FgRed
case levelFatal:
colour = color.FgRed
case levelInfo:
colour = color.FgBlue
case levelSlow:
colour = color.FgYellow
case levelStat:
colour = color.FgGreen
}
if colour == color.NoColor {
return level
}
return color.WithColorPadding(level, colour)
}
func writeJson(writer io.Writer, info interface{}) {
if content, err := json.Marshal(info); err != nil {
log.Println(err.Error())
} else if writer == nil {
log.Println(string(content))
} else {
writer.Write(append(content, '\n'))
}
}
func writePlainAny(writer io.Writer, level string, val interface{}, fields ...string) {
switch v := val.(type) {
case string:
writePlainText(writer, level, v, fields...)
case error:
writePlainText(writer, level, v.Error(), fields...)
case fmt.Stringer:
writePlainText(writer, level, v.String(), fields...)
default:
var buf strings.Builder
buf.WriteString(getTimestamp())
buf.WriteByte(plainEncodingSep)
buf.WriteString(level)
buf.WriteByte(plainEncodingSep)
if err := json.NewEncoder(&buf).Encode(val); err != nil {
log.Println(err.Error())
return
}
for _, item := range fields {
buf.WriteByte(plainEncodingSep)
buf.WriteString(item)
}
buf.WriteByte('\n')
if writer == nil {
log.Println(buf.String())
return
}
if _, err := fmt.Fprint(writer, buf.String()); err != nil {
log.Println(err.Error())
}
}
}
func writePlainText(writer io.Writer, level, msg string, fields ...string) {
var buf strings.Builder
buf.WriteString(getTimestamp())
buf.WriteByte(plainEncodingSep)
buf.WriteString(level)
buf.WriteByte(plainEncodingSep)
buf.WriteString(msg)
for _, item := range fields {
buf.WriteByte(plainEncodingSep)
buf.WriteString(item)
}
buf.WriteByte('\n')
if writer == nil {
log.Println(buf.String())
return
}
if _, err := fmt.Fprint(writer, buf.String()); err != nil {
log.Println(err.Error())
}
}