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gitea/vendor/github.com/couchbase/goutils/logging/logger_golog.go

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Go

// Copyright (c) 2016-2019 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package logging
import (
"bytes"
"encoding/json"
"fmt"
"io"
"log"
"time"
)
type goLogger struct {
logger *log.Logger
level Level
entryFormatter formatter
}
const (
_LEVEL = "_level"
_MSG = "_msg"
_TIME = "_time"
_RLEVEL = "_rlevel"
)
func NewLogger(out io.Writer, lvl Level, fmtLogging LogEntryFormatter, fmtArgs ...interface{}) *goLogger {
logger := &goLogger{
logger: log.New(out, "", 0),
level: lvl,
}
if fmtLogging == JSONFORMATTER {
logger.entryFormatter = &jsonFormatter{}
} else if fmtLogging == KVFORMATTER {
logger.entryFormatter = &keyvalueFormatter{}
} else if fmtLogging == UNIFORMFORMATTER {
logger.entryFormatter = &uniformFormatter{
callback: fmtArgs[0].(ComponentCallback),
}
} else {
logger.entryFormatter = &textFormatter{}
}
return logger
}
func (gl *goLogger) Logp(level Level, msg string, kv ...Pair) {
if gl.logger == nil {
return
}
if level <= gl.level {
e := newLogEntry(msg, level)
copyPairs(e, kv)
gl.log(e)
}
}
func (gl *goLogger) Debugp(msg string, kv ...Pair) {
gl.Logp(DEBUG, msg, kv...)
}
func (gl *goLogger) Tracep(msg string, kv ...Pair) {
gl.Logp(TRACE, msg, kv...)
}
func (gl *goLogger) Requestp(rlevel Level, msg string, kv ...Pair) {
if gl.logger == nil {
return
}
if REQUEST <= gl.level {
e := newLogEntry(msg, REQUEST)
e.Rlevel = rlevel
copyPairs(e, kv)
gl.log(e)
}
}
func (gl *goLogger) Infop(msg string, kv ...Pair) {
gl.Logp(INFO, msg, kv...)
}
func (gl *goLogger) Warnp(msg string, kv ...Pair) {
gl.Logp(WARN, msg, kv...)
}
func (gl *goLogger) Errorp(msg string, kv ...Pair) {
gl.Logp(ERROR, msg, kv...)
}
func (gl *goLogger) Severep(msg string, kv ...Pair) {
gl.Logp(SEVERE, msg, kv...)
}
func (gl *goLogger) Fatalp(msg string, kv ...Pair) {
gl.Logp(FATAL, msg, kv...)
}
func (gl *goLogger) Logm(level Level, msg string, kv Map) {
if gl.logger == nil {
return
}
if level <= gl.level {
e := newLogEntry(msg, level)
e.Data = kv
gl.log(e)
}
}
func (gl *goLogger) Debugm(msg string, kv Map) {
gl.Logm(DEBUG, msg, kv)
}
func (gl *goLogger) Tracem(msg string, kv Map) {
gl.Logm(TRACE, msg, kv)
}
func (gl *goLogger) Requestm(rlevel Level, msg string, kv Map) {
if gl.logger == nil {
return
}
if REQUEST <= gl.level {
e := newLogEntry(msg, REQUEST)
e.Rlevel = rlevel
e.Data = kv
gl.log(e)
}
}
func (gl *goLogger) Infom(msg string, kv Map) {
gl.Logm(INFO, msg, kv)
}
func (gl *goLogger) Warnm(msg string, kv Map) {
gl.Logm(WARN, msg, kv)
}
func (gl *goLogger) Errorm(msg string, kv Map) {
gl.Logm(ERROR, msg, kv)
}
func (gl *goLogger) Severem(msg string, kv Map) {
gl.Logm(SEVERE, msg, kv)
}
func (gl *goLogger) Fatalm(msg string, kv Map) {
gl.Logm(FATAL, msg, kv)
}
func (gl *goLogger) Logf(level Level, format string, args ...interface{}) {
if gl.logger == nil {
return
}
if level <= gl.level {
e := newLogEntry(fmt.Sprintf(format, args...), level)
gl.log(e)
}
}
func (gl *goLogger) Debugf(format string, args ...interface{}) {
gl.Logf(DEBUG, format, args...)
}
func (gl *goLogger) Tracef(format string, args ...interface{}) {
gl.Logf(TRACE, format, args...)
}
func (gl *goLogger) Requestf(rlevel Level, format string, args ...interface{}) {
if gl.logger == nil {
return
}
if REQUEST <= gl.level {
e := newLogEntry(fmt.Sprintf(format, args...), REQUEST)
e.Rlevel = rlevel
gl.log(e)
}
}
func (gl *goLogger) Infof(format string, args ...interface{}) {
gl.Logf(INFO, format, args...)
}
func (gl *goLogger) Warnf(format string, args ...interface{}) {
gl.Logf(WARN, format, args...)
}
func (gl *goLogger) Errorf(format string, args ...interface{}) {
gl.Logf(ERROR, format, args...)
}
func (gl *goLogger) Severef(format string, args ...interface{}) {
gl.Logf(SEVERE, format, args...)
}
func (gl *goLogger) Fatalf(format string, args ...interface{}) {
gl.Logf(FATAL, format, args...)
}
func (gl *goLogger) Level() Level {
return gl.level
}
func (gl *goLogger) SetLevel(level Level) {
gl.level = level
}
func (gl *goLogger) log(newEntry *logEntry) {
s := gl.entryFormatter.format(newEntry)
gl.logger.Print(s)
}
type logEntry struct {
Time string
Level Level
Rlevel Level
Message string
Data Map
}
func newLogEntry(msg string, level Level) *logEntry {
return &logEntry{
Time: time.Now().Format("2006-01-02T15:04:05.000-07:00"), // time.RFC3339 with milliseconds
Level: level,
Rlevel: NONE,
Message: msg,
}
}
func copyPairs(newEntry *logEntry, pairs []Pair) {
newEntry.Data = make(Map, len(pairs))
for _, p := range pairs {
newEntry.Data[p.Name] = p.Value
}
}
type formatter interface {
format(*logEntry) string
}
type textFormatter struct {
}
// ex. 2016-02-10T09:15:25.498-08:00 [INFO] This is a message from test in text format
func (*textFormatter) format(newEntry *logEntry) string {
b := &bytes.Buffer{}
appendValue(b, newEntry.Time)
if newEntry.Rlevel != NONE {
fmt.Fprintf(b, "[%s,%s] ", newEntry.Level.String(), newEntry.Rlevel.String())
} else {
fmt.Fprintf(b, "[%s] ", newEntry.Level.String())
}
appendValue(b, newEntry.Message)
for key, value := range newEntry.Data {
appendKeyValue(b, key, value)
}
b.WriteByte('\n')
s := bytes.NewBuffer(b.Bytes())
return s.String()
}
func appendValue(b *bytes.Buffer, value interface{}) {
if _, ok := value.(string); ok {
fmt.Fprintf(b, "%s ", value)
} else {
fmt.Fprintf(b, "%v ", value)
}
}
type keyvalueFormatter struct {
}
// ex. _time=2016-02-10T09:15:25.498-08:00 _level=INFO _msg=This is a message from test in key-value format
func (*keyvalueFormatter) format(newEntry *logEntry) string {
b := &bytes.Buffer{}
appendKeyValue(b, _TIME, newEntry.Time)
appendKeyValue(b, _LEVEL, newEntry.Level.String())
if newEntry.Rlevel != NONE {
appendKeyValue(b, _RLEVEL, newEntry.Rlevel.String())
}
appendKeyValue(b, _MSG, newEntry.Message)
for key, value := range newEntry.Data {
appendKeyValue(b, key, value)
}
b.WriteByte('\n')
s := bytes.NewBuffer(b.Bytes())
return s.String()
}
func appendKeyValue(b *bytes.Buffer, key, value interface{}) {
if _, ok := value.(string); ok {
fmt.Fprintf(b, "%v=%s ", key, value)
} else {
fmt.Fprintf(b, "%v=%v ", key, value)
}
}
type jsonFormatter struct {
}
// ex. {"_level":"INFO","_msg":"This is a message from test in json format","_time":"2016-02-10T09:12:59.518-08:00"}
func (*jsonFormatter) format(newEntry *logEntry) string {
if newEntry.Data == nil {
newEntry.Data = make(Map, 5)
}
newEntry.Data[_TIME] = newEntry.Time
newEntry.Data[_LEVEL] = newEntry.Level.String()
if newEntry.Rlevel != NONE {
newEntry.Data[_RLEVEL] = newEntry.Rlevel.String()
}
newEntry.Data[_MSG] = newEntry.Message
serialized, _ := json.Marshal(newEntry.Data)
s := bytes.NewBuffer(append(serialized, '\n'))
return s.String()
}
type ComponentCallback func() string
type uniformFormatter struct {
callback ComponentCallback
}
// ex. 2019-03-15T11:28:07.652-04:00 DEBU COMPONENT.subcomponent This is a message from test in uniform format
var _LEVEL_UNIFORM = []string{
DEBUG: "DEBU",
TRACE: "TRAC",
REQUEST: "REQU",
INFO: "INFO",
WARN: "WARN",
ERROR: "ERRO",
SEVERE: "SEVE",
FATAL: "FATA",
NONE: "NONE",
}
func (level Level) UniformString() string {
return _LEVEL_UNIFORM[level]
}
func (uf *uniformFormatter) format(newEntry *logEntry) string {
b := &bytes.Buffer{}
appendValue(b, newEntry.Time)
component := uf.callback()
if newEntry.Rlevel != NONE {
// not really any accommodation for a composite level in the uniform standard; just output as abbr,abbr
fmt.Fprintf(b, "%s,%s %s ", newEntry.Level.UniformString(), newEntry.Rlevel.UniformString(), component)
} else {
fmt.Fprintf(b, "%s %s ", newEntry.Level.UniformString(), component)
}
appendValue(b, newEntry.Message)
for key, value := range newEntry.Data {
appendKeyValue(b, key, value)
}
b.WriteByte('\n')
s := bytes.NewBuffer(b.Bytes())
return s.String()
}