log0

package module
v0.173.0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jul 31, 2021 License: BSD-3-Clause Imports: 16 Imported by: 0

README

log0

Build Status Go Reference

JSON logging for Go.
Source files are distributed under the BSD-style license found in the LICENSE file.

About

The software is considered to be at a alpha level of readiness - its extremely slow and allocates a lots of memory)

Install

go get github.com/kvlog/log0@v0.173.0

Usage

Set log0 as global logger

package main

import (
    "os"
    "log"

    "github.com/kvlog/log0"
)

func main() {
    l := &log0.Log{
        Output:  os.Stdout,
        Keys:    [4]encoding.TextMarshaler{log0.String("message"), log0.String("excerpt")},
        Trunc:   12,
        Marks:   [3][]byte{[]byte("…")},
        Replace: [][2][]byte{[2][]byte{[]byte("\n"), []byte(" ")}},
    }
    log.SetFlags(0)
    log.SetOutput(l)

    log.Print("Hello,\nWorld!")
}

Output:

{
    "message":"Hello,\nWorld!",
    "excerpt":"Hello, World…"
}

Use as GELF formater

package main

import (
    "log"
    "os"

    "github.com/kvlog/log0"
)

func main() {
    l := log0.GELF()
    l.Output = os.Stdout
    log.SetFlags(0)
    log.SetOutput(l)
    log.Print("Hello,\nGELF!")
}

Output:

{
    "version":"1.1",
    "short_message":"Hello, GELF!",
    "full_message":"Hello,\nGELF!",
    "timestamp":1602785340
}

Caveat: numeric types appears in the message as a string

package main

import (
    "log"
    "os"

    "github.com/kvlog/log0"
)

func main() {
    l := log0.Log{
        Output: os.Stdout,
        Keys:   [4]encoding.TextMarshaler{log0.String("message")},
    }
    log.SetFlags(0)
    log.SetOutput(l)

    log.Print(123)
    log.Print(3.21)
}

Output 1:

{
    "message":"123"
}

Output 2:

{
    "message":"3.21"
}

Benchmark

go test -bench=. ./...
goos: linux
goarch: amd64
pkg: github.com/kvlog/log0
cpu: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
BenchmarkLog0/io.Writer_77-8         	  163160	      7221 ns/op	    1722 B/op	      53 allocs/op
BenchmarkLog0/fmt.Fprint_io.Writer_1127-8         	  102769	     12399 ns/op	    3401 B/op	      61 allocs/op
PASS
ok  	github.com/kvlog/log0	3.835s

Documentation

Overview

Package log0 is a JSON logging.

Index

Constants

View Source 
const (
	Original = iota
	Excerpt
	Trail
	File
)
View Source 
const (
	Trunc = iota
	Empty
	Blank
)

Variables

This section is empty.

Functions

func Any 

func Any(v interface{}) anyV

Any returns stringer/JSON/text marshaler for any type.

func Anys 

func Anys(s ...interface{}) anyS

Anys returns stringer/JSON/text marshaler for the slice of any type.

func Bool 

func Bool(v bool) boolV

Bool returns stringer/JSON/text marshaler for the bool type.

func Boolp 

func Boolp(p *bool) boolP

Boolp returns stringer/JSON/text marshaler for the bool pointer type.

func Boolps 

func Boolps(s ...*bool) boolPS

Boolps returns stringer/JSON/text marshaler for slice of bool pointers type.

func Bools 

func Bools(s ...bool) boolS

Bools returns stringer/JSON/text marshaler for the bool slice type.

func Bytes 

func Bytes(s ...byte) byteS

Bytes returns stringer/JSON/text marshaler for slice of bytes type.

func Bytesp 

func Bytesp(p *[]byte) byteSP

Bytesp returns stringer/JSON/text marshaler for the pointer to byte slice type.

func Bytesps 

func Bytesps(a ...*[]byte) byteSPS

Bytesps returns stringer/JSON/text marshaler for slice of pointers to byte slice type.

func Bytess 

func Bytess(s ...[]byte) byteSS

Bytess returns stringer/JSON/text marshaler for the slice of byte slice type.

func Complex128 

func Complex128(v complex128) complex128V

Complex128 returns stringer/JSON/text marshaler for the complex128 type.

func Complex128p 

func Complex128p(p *complex128) complex128P

Complex128p returns stringer/JSON/text marshaler for the complex128 pointer type.

func Complex128ps 

func Complex128ps(a ...*complex128) complex128PS

Complex128ps returns stringer/JSON/text marshaler for the complex128 pointer slice type.

func Complex128s 

func Complex128s(s ...complex128) complex128S

Complex128s returns stringer/JSON/text marshaler for the complex128 slice type.

func Complex64 

func Complex64(v complex64) complex64V

Complex64 returns stringer/JSON/text marshaler for the complex64 type.

func Complex64p 

func Complex64p(p *complex64) complex64P

Complex64p returns stringer/JSON/text marshaler for the complex64 pointer type.

func Complex64ps 

func Complex64ps(s ...*complex64) complex64PS

Complex64ps returns stringer/JSON/text marshaler for the slice of complex64 pointers type.

func Complex64s 

func Complex64s(s ...complex64) complex64S

Complex64s returns stringer/JSON/text marshaler for the complex64 type.

func Duration 

func Duration(v time.Duration) durationV

Duration returns stringer/JSON/text marshaler for the time duration type.

func Durationp 

func Durationp(p *time.Duration) durationP

Durationp returns stringer/JSON/text marshaler for the time duration pointer type.

func Durationps 

func Durationps(s ...*time.Duration) durationPS

Durationps returns stringer/JSON/text marshaler for the time duration pointer slice type.

func Durations 

func Durations(s ...time.Duration) durationS

Durations returns stringer/JSON/text marshaler for time duration slice type.

func Error 

func Error(v error) errorV

Error returns stringer/JSON/text marshaler for the error type.

func Errorp 

func Errorp(p *error) errorP

Errorp returns stringer/JSON/text marshaler for the error pointer type.

func Errorps 

func Errorps(s ...*error) errorPS

Errorps returns stringer/JSON/text marshaler for the slice of error pointers type.

func Errors 

func Errors(s ...error) errorS

Errors returns stringer/JSON/text marshaler for the error slice type.

func Float32 

func Float32(v float32) float32V

Float32 returns stringer/JSON/text marshaler for the float32 type.

func Float32p 

func Float32p(p *float32) float32P

Float32p returns stringer/JSON/text marshaler for the float32 pointer type.

func Float32ps 

func Float32ps(a ...*float32) float32PS

Float32ps returns stringer/JSON/text marshaler for the float32 pointer slice type.

func Float32s 

func Float32s(s ...float32) float32S

Float32s returns stringer/JSON/text marshaler for the float32 slice type.

func Float64 

func Float64(v float64) float64V

Float64 returns stringer/JSON/text marshaler for the float64 type.

func Float64p 

func Float64p(p *float64) float64P

Float64p returns stringer/JSON/text marshaler for the float64 pointer type.

func Float64ps 

func Float64ps(a ...*float64) float64PS

Float64ps returns stringer/JSON/text marshaler for the float64 pointer slice type.

func Float64s 

func Float64s(s ...float64) float64S

Float64s returns stringer/JSON/text marshaler for the float64 slice type.

func Func 

func Func(v func() KV) funcV

Func returns stringer/JSON/text marshaler for the custom function type.

func Int 

func Int(v int) intV

Int returns stringer/JSON/text marshaler for the int type.

func Int16 

func Int16(v int16) int16V

Int16 returns stringer/JSON/text marshaler for the int16 type.

func Int16p 

func Int16p(p *int16) int16P

Int16p returns stringer/JSON/text marshaler for the int16 pointer type.

func Int16ps 

func Int16ps(a ...*int16) int16PS

Int16ps returns stringer/JSON/text marshaler for the int16 pointer slice type.

func Int16s 

func Int16s(s ...int16) int16S

Int16s returns stringer/JSON/text marshaler for the int16 slice type.

func Int32 

func Int32(v int32) int32V

Int32 returns stringer/JSON/text marshaler for the int32 type.

func Int32p 

func Int32p(p *int32) int32P

Int32p returns stringer/JSON/text marshaler for the int32 pointer type.

func Int32ps 

func Int32ps(a ...*int32) int32PS

Int32ps returns stringer/JSON/text marshaler for the int32 pointer slice type.

func Int32s 

func Int32s(s ...int32) int32S

Int32s returns stringer/JSON/text marshaler for the int32 slice type.

func Int64 

func Int64(v int64) int64V

Int64 returns stringer/JSON/text marshaler for the int64 type.

func Int64p 

func Int64p(p *int64) int64P

Int64p returns stringer/JSON/text marshaler for the int64 pointer type.

func Int64ps 

func Int64ps(a ...*int64) int64PS

Int64ps returns stringer/JSON/text marshaler for the int64 pointer slice type.

func Int64s 

func Int64s(s ...int64) int64S

Int64s returns stringer/JSON/text marshaler for the int64 slice type.

func Int8 

func Int8(v int8) int8V

Int8 returns stringer/JSON/text marshaler for the int8 type.

func Int8p 

func Int8p(p *int8) int8P

Int8p returns stringer/JSON/text marshaler for the int8 pointer type.

func Int8ps 

func Int8ps(a ...*int8) int8PS

Int8ps returns stringer/JSON/text marshaler for the int8 pointer slice type.

func Int8s 

func Int8s(s ...int8) int8S

Int8s returns stringer/JSON/text marshaler for the int8 slice type.

func Intp 

func Intp(p *int) intP

Intp returns stringer/JSON/text marshaler for the int pointer type.

func Intps 

func Intps(a ...*int) intPS

Intps returns stringer/JSON/text marshaler for the int pointer slice type.

func Ints 

func Ints(s ...int) intS

Ints returns stringer/JSON/text marshaler for the int slice type.

func JSON 

func JSON(s ...KV) jsonV

JSON returns stringer/JSON/text marshaler for the KV slice type.

func JSONMarshalers 

func JSONMarshalers(s ...json.Marshaler) jsonMarshalerS

JSONMarshalers returns stringer/JSON/text marshaler for the JSON marshaler slice type.

func Raw 

func Raw(v []byte) rawV

Raw returns stringer/JSON/text marshaler for the raw byte slice.

func Rawp 

func Rawp(p *[]byte) rawP

Rawp returns stringer/JSON/text marshaler for the raw byte slice pointer.

func Rawps 

func Rawps(s ...*[]byte) rawPS

Rawps returns stringer/JSON/text marshaler for the slice of byte slice pointers type.

func Raws 

func Raws(s ...[]byte) rawS

Raws returns stringer/JSON/text marshaler for the slice of byte slice type.

func Reflect 

func Reflect(v interface{}) reflectV

func Reflects 

func Reflects(s ...interface{}) reflectS

func Runes 

func Runes(s ...rune) runeS

Runes returns stringer/JSON/text marshaler for the rune slice type.

func Runesp 

func Runesp(p *[]rune) runeSP

Runesp returns stringer/JSON/text marshaler for the rune pointer slice type.

func Runesps 

func Runesps(a ...*[]rune) runeSPS

Runesps returns stringer/JSON/text marshaler for slice of pointers to rune slice type.

func String 

func String(v string) stringV

String returns stringer/JSON/text marshaler for the string type.

func StringAny 

func StringAny(k string, v interface{}) kvm

func StringBool 

func StringBool(k string, v bool) kvm

func StringBoolp 

func StringBoolp(k string, v *bool) kvm

func StringBools 

func StringBools(k string, v ...bool) kvm

func StringBytes 

func StringBytes(k string, v ...byte) kvm

func StringBytesp 

func StringBytesp(k string, v *[]byte) kvm

func StringBytess 

func StringBytess(k string, v ...[]byte) kvm

func StringBytessp 

func StringBytessp(k string, v ...*[]byte) kvm

func StringComplex128 

func StringComplex128(k string, v complex128) kvm

func StringComplex128p 

func StringComplex128p(k string, v *complex128) kvm

func StringComplex64 

func StringComplex64(k string, v complex64) kvm

func StringComplex64p 

func StringComplex64p(k string, v *complex64) kvm

func StringDuration 

func StringDuration(k string, v time.Duration) kvm

func StringDurationp 

func StringDurationp(k string, v *time.Duration) kvm

func StringError 

func StringError(k string, v error) kvm

func StringErrors 

func StringErrors(k string, v ...error) kvm

func StringFloat32 

func StringFloat32(k string, v float32) kvm

func StringFloat32p 

func StringFloat32p(k string, v *float32) kvm

func StringFloat64 

func StringFloat64(k string, v float64) kvm

func StringFloat64p 

func StringFloat64p(k string, v *float64) kvm

func StringFunc 

func StringFunc(k string, v func() KV) kvm

func StringInt 

func StringInt(k string, v int) kvm

func StringInt16 

func StringInt16(k string, v int16) kvm

func StringInt16p 

func StringInt16p(k string, v *int16) kvm

func StringInt32 

func StringInt32(k string, v int32) kvm

func StringInt32p 

func StringInt32p(k string, v *int32) kvm

func StringInt64 

func StringInt64(k string, v int64) kvm

func StringInt64p 

func StringInt64p(k string, v *int64) kvm

func StringInt8 

func StringInt8(k string, v int8) kvm

func StringInt8p 

func StringInt8p(k string, v *int8) kvm

func StringIntp 

func StringIntp(k string, v *int) kvm

func StringLevel 

func StringLevel(k string, v string) kvl

func StringRaw 

func StringRaw(k string, v []byte) kvm

func StringReflect 

func StringReflect(k string, v interface{}) kvm

func StringRunes 

func StringRunes(k string, v ...rune) kvm

func StringRunesp 

func StringRunesp(k string, v *[]rune) kvm

func StringString 

func StringString(k string, v string) kvm

func StringStringp 

func StringStringp(k string, v *string) kvm

func StringStrings 

func StringStrings(k string, v ...string) kvm

func StringTime 

func StringTime(k string, v time.Time) kvm

func StringTimep 

func StringTimep(k string, v *time.Time) kvm

func StringUint 

func StringUint(k string, v uint) kvm

func StringUint16 

func StringUint16(k string, v uint16) kvm

func StringUint16p 

func StringUint16p(k string, v *uint16) kvm

func StringUint32 

func StringUint32(k string, v uint32) kvm

func StringUint32p 

func StringUint32p(k string, v *uint32) kvm

func StringUint64 

func StringUint64(k string, v uint64) kvm

func StringUint64p 

func StringUint64p(k string, v *uint64) kvm

func StringUint8 

func StringUint8(k string, v uint8) kvm

func StringUint8p 

func StringUint8p(k string, v *uint8) kvm

func StringUintp 

func StringUintp(k string, v *uint) kvm

func StringUintptr 

func StringUintptr(k string, v uintptr) kvm

func StringUintptrp 

func StringUintptrp(k string, v *uintptr) kvm

func Stringp 

func Stringp(p *string) stringP

Stringp returns stringer/JSON/text marshaler for the string pointer type.

func Stringps 

func Stringps(a ...*string) stringPS

Stringps returns stringer/JSON/text marshaler for the string pointer slice type.

func Strings 

func Strings(s ...string) stringS

Strings returns stringer/JSON/text marshaler for the string slice type.

func Text 

func Text(v encoding.TextMarshaler) textV

Text returns stringer/JSON/text marshaler for the encoding.TextMarshaler type.

func TextAny 

func TextAny(k encoding.TextMarshaler, v interface{}) kvm

func TextBool 

func TextBool(k encoding.TextMarshaler, v bool) kvm

func TextBoolp 

func TextBoolp(k encoding.TextMarshaler, v *bool) kvm

func TextBytes 

func TextBytes(k encoding.TextMarshaler, v ...byte) kvm

func TextBytesp 

func TextBytesp(k encoding.TextMarshaler, v *[]byte) kvm

func TextComplex128 

func TextComplex128(k encoding.TextMarshaler, v complex128) kvm

func TextComplex128p 

func TextComplex128p(k encoding.TextMarshaler, v *complex128) kvm

func TextComplex64 

func TextComplex64(k encoding.TextMarshaler, v complex64) kvm

func TextComplex64p 

func TextComplex64p(k encoding.TextMarshaler, v *complex64) kvm

func TextDuration 

func TextDuration(k encoding.TextMarshaler, v time.Duration) kvm

func TextDurationp 

func TextDurationp(k encoding.TextMarshaler, v *time.Duration) kvm

func TextError 

func TextError(k encoding.TextMarshaler, v error) kvm

func TextFloat32 

func TextFloat32(k encoding.TextMarshaler, v float32) kvm

func TextFloat32p 

func TextFloat32p(k encoding.TextMarshaler, v *float32) kvm

func TextFloat64 

func TextFloat64(k encoding.TextMarshaler, v float64) kvm

func TextFloat64p 

func TextFloat64p(k encoding.TextMarshaler, v *float64) kvm

func TextFunc 

func TextFunc(k encoding.TextMarshaler, v func() json.Marshaler) kvm

func TextInt 

func TextInt(k encoding.TextMarshaler, v int) kvm

func TextInt16 

func TextInt16(k encoding.TextMarshaler, v int16) kvm

func TextInt16p 

func TextInt16p(k encoding.TextMarshaler, v *int16) kvm

func TextInt32 

func TextInt32(k encoding.TextMarshaler, v int32) kvm

func TextInt32p 

func TextInt32p(k encoding.TextMarshaler, v *int32) kvm

func TextInt64 

func TextInt64(k encoding.TextMarshaler, v int64) kvm

func TextInt64p 

func TextInt64p(k encoding.TextMarshaler, v *int64) kvm

func TextInt8 

func TextInt8(k encoding.TextMarshaler, v int8) kvm

func TextInt8p 

func TextInt8p(k encoding.TextMarshaler, v *int8) kvm

func TextIntp 

func TextIntp(k encoding.TextMarshaler, v *int) kvm

func TextRaw 

func TextRaw(k encoding.TextMarshaler, v []byte) kvm

func TextReflect 

func TextReflect(k encoding.TextMarshaler, v interface{}) kvm

func TextRunes 

func TextRunes(k encoding.TextMarshaler, v ...rune) kvm

func TextRunesp 

func TextRunesp(k encoding.TextMarshaler, v *[]rune) kvm

func TextString 

func TextString(k encoding.TextMarshaler, v string) kvm

func TextStringp 

func TextStringp(k encoding.TextMarshaler, v *string) kvm

func TextText 

func TextText(k, v encoding.TextMarshaler) kvm

func TextTime 

func TextTime(k encoding.TextMarshaler, v time.Time) kvm

func TextTimep 

func TextTimep(k encoding.TextMarshaler, v *time.Time) kvm

func TextUint 

func TextUint(k encoding.TextMarshaler, v uint) kvm

func TextUint16 

func TextUint16(k encoding.TextMarshaler, v uint16) kvm

func TextUint16p 

func TextUint16p(k encoding.TextMarshaler, v *uint16) kvm

func TextUint32 

func TextUint32(k encoding.TextMarshaler, v uint32) kvm

func TextUint32p 

func TextUint32p(k encoding.TextMarshaler, v *uint32) kvm

func TextUint64 

func TextUint64(k encoding.TextMarshaler, v uint64) kvm

func TextUint64p 

func TextUint64p(k encoding.TextMarshaler, v *uint64) kvm

func TextUint8 

func TextUint8(k encoding.TextMarshaler, v uint8) kvm

func TextUint8p 

func TextUint8p(k encoding.TextMarshaler, v *uint8) kvm

func TextUintp 

func TextUintp(k encoding.TextMarshaler, v *uint) kvm

func TextUintptr 

func TextUintptr(k encoding.TextMarshaler, v uintptr) kvm

func TextUintptrp 

func TextUintptrp(k encoding.TextMarshaler, v *uintptr) kvm

func Texts 

func Texts(s ...encoding.TextMarshaler) textS

Texts returns stringer/JSON/text marshaler for the text marshaler slice type.

func Time 

func Time(v time.Time) timeV

Time returns stringer/JSON/text marshaler for the time type.

func Timep 

func Timep(p *time.Time) timeP

Timep returns stringer/JSON/text marshaler for the time pointer type.

func Timeps 

func Timeps(a ...*time.Time) timePS

Timeps returns stringer/JSON/text marshaler for the time pointer slice type.

func Times 

func Times(s ...time.Time) timeS

Times returns stringer/JSON/text marshaler for the slice of byte slice type.

func Uint 

func Uint(v uint) uintV

Uint returns stringer/JSON/text marshaler for the uint type.

func Uint16 

func Uint16(v uint16) uint16V

Uint16 returns stringer/JSON/text marshaler for the uint16 type.

func Uint16p 

func Uint16p(p *uint16) uint16P

Uint16p returns stringer/JSON/text marshaler for the uint16 pointer type.

func Uint16ps 

func Uint16ps(a ...*uint16) uint16PS

Uint16ps returns stringer/JSON/text marshaler for the uint16 pointer slice type.

func Uint16s 

func Uint16s(s ...uint16) uint16S

Uint16s returns stringer/JSON/text marshaler for the uint16 slice type.

func Uint32 

func Uint32(v uint32) uint32V

Uint32 returns stringer/JSON/text marshaler for the uint32 type.

func Uint32p 

func Uint32p(p *uint32) uint32P

Uint32p returns stringer/JSON/text marshaler for the uint32 pointer type.

func Uint32ps 

func Uint32ps(a ...*uint32) uint32PS

Uint32ps returns stringer/JSON/text marshaler for the uint32 pointer slice type.

func Uint32s 

func Uint32s(s ...uint32) uint32S

Uint32s returns stringer/JSON/text marshaler for the uint32 slice type.

func Uint64 

func Uint64(v uint64) uint64V

Uint64 returns stringer/JSON/text marshaler for the uint64 type.

func Uint64p 

func Uint64p(p *uint64) uint64P

Uint64p returns stringer/JSON/text marshaler for the uint64 pointer type.

func Uint64ps 

func Uint64ps(a ...*uint64) uint64PS

Uint64ps returns stringer/JSON/text marshaler for the uint64 pointer slice type.

func Uint64s 

func Uint64s(s ...uint64) uint64S

Uint64s returns stringer/JSON/text marshaler for the uint64 slice type.

func Uint8 

func Uint8(v uint8) uint8V

Uint8 returns stringer/JSON/text marshaler for the uint8 type.

func Uint8p 

func Uint8p(p *uint8) uint8P

Uint8p returns stringer/JSON/text marshaler for the uint8 pointer type.

func Uint8ps 

func Uint8ps(a ...*uint8) uint8PS

Uint8ps returns stringer/JSON/text marshaler for the uint8 pointer slice type.

func Uint8s 

func Uint8s(s ...uint8) uint8S

Uint8s returns stringer/JSON/text marshaler for the uint8 slice type.

func Uintp 

func Uintp(p *uint) uintP

Uintp returns stringer/JSON/text marshaler for the uint pointer type.

func Uintps 

func Uintps(a ...*uint) uintPS

Uintps returns stringer/JSON/text marshaler for the uint pointer slice type.

func Uintptr 

func Uintptr(v uintptr) uintptrV

Uintptr returns stringer/JSON/text marshaler for the uintptr type.

func Uintptrp 

func Uintptrp(p *uintptr) uintptrP

Uintptrp returns stringer/JSON/text marshaler for the uintptr pointer type.

func Uintptrps 

func Uintptrps(a ...*uintptr) uintptrPS

Uintptrps returns stringer/JSON/text marshaler for the slice of a pointer to a uintptr type.

func Uintptrs 

func Uintptrs(s ...uintptr) uintptrS

Uintptrs returns stringer/JSON/text marshaler for the uintptr slice type.

func Uints 

func Uints(s ...uint) uintS

Uints returns stringer/JSON/text marshaler for the uint slice type.

Types

type Encoder 

type Encoder interface {
	Encode(...KV) []byte
}

type KV 

type KV interface {
	encoding.TextMarshaler
	json.Marshaler
}

KV is a key-value pair.

type KeyValuer 

type KeyValuer interface {
	KeyValues() []KV
}

KeyValuer provides key-values slice.

type Leveler 

type Leveler interface {
	Level() string
}

Leveler provides severity level.

type Log 

type Log struct {
	Output  io.Writer                             // Output is a destination for output.
	Flag    int                                   // Flag is a log properties.
	KV      []KV                                  // KV is a key-values.
	Level   func(level string) (output io.Writer) // Level function receives severity level and returns a output writer for a severity level.
	Keys    [4]encoding.TextMarshaler             // Keys: 0 = original message; 1 = message excerpt; 2 = message trail; 3 = file path.
	Key     uint8                                 // Key is a default/sticky message key: all except 1 = original message; 1 = message excerpt.
	Trunc   int                                   // Trunc is a maximum length of an excerpt, after which it is truncated.
	Marks   [3][]byte                             // Marks: 0 = truncate; 1 = empty; 2 = blank.
	Replace [][2][]byte                           // Replace ia a pairs of byte slices to replace in the message excerpt.
}

Log is a JSON logger/writer.

func GELF 

func GELF() *Log

GELF returns a GELF formater <https://docs.graylog.org/en/latest/pages/gelf.html>.

func (*Log) Close added in v0.173.0 

func (l *Log) Close() error

Close puts a log into sync pool.

func (*Log) Encode 

func (l *Log) Encode(kv ...KV) []byte

func (*Log) KeyValues 

func (l *Log) KeyValues() []KV

func (*Log) Tee added in v0.173.0 

func (l *Log) Tee(kv ...KV) Logger

Tee returns copy of the logger with additional key-values. If first key-value pair implements the Leveler interface and the Level field of the Log is not null then calls the function from Level field with the severity level as argument which obtained from Leveler interface. Then the function from Level field returns writer for output of the logger. Copy of the original key-values has the priority lower than the priority of the newer key-values.

func (Log) Truncate 

func (l Log) Truncate(dst, src []byte) (int, error)

Truncate writes excerpt of the src to the dst and returns number of the written bytes and error if occurre.

func (*Log) Write 

func (l *Log) Write(src []byte) (int, error)

Write implements io.Writer. Do nothing if log does not have output.

type Logger 

type Logger interface {
	io.Writer
	// Tee returns copy of the logger with an additional key-values.
	// Copy of the original key-values should have a lower priority
	// than the priority of the newer key-values.
	Tee(...KV) Logger
	// Close puts the logger into the sync pool.
	Close() error
}

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