glog

package
v2.0.6 Latest Latest
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Published: Jun 10, 2022 License: MIT Imports: 29 Imported by: 0

Documentation

Overview

Package glog implements powerful and easy-to-use levelled logging functionality.

Example (Context)
package main

import (
	"context"

	"github.com/gogf/gf/v2/frame/g"
)

func main() {
	ctx := context.WithValue(context.Background(), "Trace-Id", "123456789")
	g.Log().Error(ctx, "runtime error")

	// May Output:
	// 2020-06-08 20:17:03.630 [ERRO] {Trace-Id: 123456789} runtime error
	// Stack:
	// ...
}
Output:

Index

Examples

Constants

View Source
const (
	F_ASYNC      = 1 << iota // Print logging content asynchronously。
	F_FILE_LONG              // Print full file name and line number: /a/b/c/d.go:23.
	F_FILE_SHORT             // Print final file name element and line number: d.go:23. overrides F_FILE_LONG.
	F_TIME_DATE              // Print the date in the local time zone: 2009-01-23.
	F_TIME_TIME              // Print the time in the local time zone: 01:23:23.
	F_TIME_MILLI             // Print the time with milliseconds in the local time zone: 01:23:23.675.
	F_CALLER_FN              // Print Caller function name and package: main.main
	F_TIME_STD   = F_TIME_DATE | F_TIME_MILLI
)
View Source
const (
	COLOR_BLACK = 30 + iota
	COLOR_RED
	COLOR_GREEN
	COLOR_YELLOW
	COLOR_BLUE
	COLOR_MAGENTA
	COLOR_CYAN
	COLOR_WHITE
)
View Source
const (
	COLOR_HI_BLACK = 90 + iota
	COLOR_HI_RED
	COLOR_HI_GREEN
	COLOR_HI_YELLOW
	COLOR_HI_BLUE
	COLOR_HI_MAGENTA
	COLOR_HI_CYAN
	COLOR_HI_WHITE
)

Foreground Hi-Intensity text colors

View Source
const (
	LEVEL_ALL  = LEVEL_DEBU | LEVEL_INFO | LEVEL_NOTI | LEVEL_WARN | LEVEL_ERRO | LEVEL_CRIT
	LEVEL_DEV  = LEVEL_ALL
	LEVEL_PROD = LEVEL_WARN | LEVEL_ERRO | LEVEL_CRIT
	LEVEL_NONE = 0
	LEVEL_DEBU = 1 << iota // 8
	LEVEL_INFO             // 16
	LEVEL_NOTI             // 32
	LEVEL_WARN             // 64
	LEVEL_ERRO             // 128
	LEVEL_CRIT             // 256
	LEVEL_PANI             // 512
	LEVEL_FATA             // 1024
)

Note that the LEVEL_PANI and LEVEL_FATA levels are not used for logging output, but for prefix configurations.

View Source
const (
	// DefaultName is the default group name for instance usage.
	DefaultName = "default"
)

Variables

This section is empty.

Functions

func Critical

func Critical(ctx context.Context, v ...interface{})

Critical prints the logging content with [CRIT] header and newline. It also prints caller stack info if stack feature is enabled.

func Criticalf

func Criticalf(ctx context.Context, format string, v ...interface{})

Criticalf prints the logging content with [CRIT] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func Debug

func Debug(ctx context.Context, v ...interface{})

Debug prints the logging content with [DEBU] header and newline.

func Debugf

func Debugf(ctx context.Context, format string, v ...interface{})

Debugf prints the logging content with [DEBU] header, custom format and newline.

func Error

func Error(ctx context.Context, v ...interface{})

Error prints the logging content with [ERRO] header and newline. It also prints caller stack info if stack feature is enabled.

func Errorf

func Errorf(ctx context.Context, format string, v ...interface{})

Errorf prints the logging content with [ERRO] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func Fatal

func Fatal(ctx context.Context, v ...interface{})

Fatal prints the logging content with [FATA] header and newline, then exit the current process.

func Fatalf

func Fatalf(ctx context.Context, format string, v ...interface{})

Fatalf prints the logging content with [FATA] header, custom format and newline, then exit the current process.

func GetCtxKeys

func GetCtxKeys() []interface{}

GetCtxKeys retrieves and returns the context keys for logging.

func GetFlags

func GetFlags() int

GetFlags returns the flags of defaultLogger.

func GetLevel

func GetLevel() int

GetLevel returns the default logging level value.

func GetLevelPrefix

func GetLevelPrefix(level int) string

GetLevelPrefix returns the prefix string for specified level.

func GetPath

func GetPath() string

GetPath returns the logging directory path for file logging. It returns empty string if no directory path set.

func GetStack

func GetStack(skip ...int) string

GetStack returns the caller stack content, the optional parameter `skip` specify the skipped stack offset from the end point.

func GetWriter

func GetWriter() io.Writer

GetWriter returns the customized writer object, which implements the io.Writer interface. It returns nil if no customized writer set.

func Info

func Info(ctx context.Context, v ...interface{})

Info prints the logging content with [INFO] header and newline.

func Infof

func Infof(ctx context.Context, format string, v ...interface{})

Infof prints the logging content with [INFO] header, custom format and newline.

func Notice

func Notice(ctx context.Context, v ...interface{})

Notice prints the logging content with [NOTI] header and newline. It also prints caller stack info if stack feature is enabled.

func Noticef

func Noticef(ctx context.Context, format string, v ...interface{})

Noticef prints the logging content with [NOTI] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func Panic

func Panic(ctx context.Context, v ...interface{})

Panic prints the logging content with [PANI] header and newline, then panics.

func Panicf

func Panicf(ctx context.Context, format string, v ...interface{})

Panicf prints the logging content with [PANI] header, custom format and newline, then panics.

func Print

func Print(ctx context.Context, v ...interface{})

Print prints `v` with newline using fmt.Sprintln. The parameter `v` can be multiple variables.

func PrintStack

func PrintStack(ctx context.Context, skip ...int)

PrintStack prints the caller stack, the optional parameter `skip` specify the skipped stack offset from the end point.

func Printf

func Printf(ctx context.Context, format string, v ...interface{})

Printf prints `v` with format `format` using fmt.Sprintf. The parameter `v` can be multiple variables.

func SetAsync

func SetAsync(enabled bool)

SetAsync enables/disables async logging output feature for default defaultLogger.

func SetConfig

func SetConfig(config Config) error

SetConfig set configurations for the defaultLogger.

func SetConfigWithMap

func SetConfigWithMap(m map[string]interface{}) error

SetConfigWithMap set configurations with map for the defaultLogger.

func SetCtxKeys

func SetCtxKeys(keys ...interface{})

SetCtxKeys sets the context keys for defaultLogger. The keys is used for retrieving values from context and printing them to logging content.

Note that multiple calls of this function will overwrite the previous set context keys.

func SetDebug

func SetDebug(debug bool)

SetDebug enables/disables the debug level for default defaultLogger. The debug level is enabled in default.

func SetDefaultLogger

func SetDefaultLogger(l *Logger)

SetDefaultLogger sets the default logger for package glog. Note that there might be concurrent safety issue if calls this function in different goroutines.

func SetFile

func SetFile(pattern string)

SetFile sets the file name `pattern` for file logging. Datetime pattern can be used in `pattern`, eg: access-{Ymd}.log. The default file name pattern is: Y-m-d.log, eg: 2018-01-01.log

func SetFlags

func SetFlags(flags int)

SetFlags sets extra flags for logging output features.

func SetHandlers

func SetHandlers(handlers ...Handler)

SetHandlers sets the logging handlers for default defaultLogger.

func SetHeaderPrint

func SetHeaderPrint(enabled bool)

SetHeaderPrint sets whether output header of the logging contents, which is true in default.

func SetLevel

func SetLevel(level int)

SetLevel sets the default logging level.

func SetLevelPrefix

func SetLevelPrefix(level int, prefix string)

SetLevelPrefix sets the prefix string for specified level.

func SetLevelPrefixes

func SetLevelPrefixes(prefixes map[int]string)

SetLevelPrefixes sets the level to prefix string mapping for the defaultLogger.

func SetLevelStr

func SetLevelStr(levelStr string) error

SetLevelStr sets the logging level by level string.

func SetPath

func SetPath(path string) error

SetPath sets the directory path for file logging.

func SetPrefix

func SetPrefix(prefix string)

SetPrefix sets prefix string for every logging content. Prefix is part of header, which means if header output is shut, no prefix will be output.

func SetStack

func SetStack(enabled bool)

SetStack enables/disables the stack feature in failure logging outputs.

func SetStdoutPrint

func SetStdoutPrint(enabled bool)

SetStdoutPrint sets whether ouptput the logging contents to stdout, which is true in default.

func SetWriter

func SetWriter(writer io.Writer)

SetWriter sets the customized logging `writer` for logging. The `writer` object should implements the io.Writer interface. Developer can use customized logging `writer` to redirect logging output to another service, eg: kafka, mysql, mongodb, etc.

func SetWriterColorEnable

func SetWriterColorEnable(enabled bool)

SetWriterColorEnable sets the file logging with color

func Warning

func Warning(ctx context.Context, v ...interface{})

Warning prints the logging content with [WARN] header and newline. It also prints caller stack info if stack feature is enabled.

func Warningf

func Warningf(ctx context.Context, format string, v ...interface{})

Warningf prints the logging content with [WARN] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

Types

type Config

type Config struct {
	Handlers             []Handler      `json:"-"`                    // Logger handlers which implement feature similar as middleware.
	Writer               io.Writer      `json:"-"`                    // Customized io.Writer.
	Flags                int            `json:"flags"`                // Extra flags for logging output features.
	Path                 string         `json:"path"`                 // Logging directory path.
	File                 string         `json:"file"`                 // Format pattern for logging file.
	Level                int            `json:"level"`                // Output level.
	Prefix               string         `json:"prefix"`               // Prefix string for every logging content.
	StSkip               int            `json:"stSkip"`               // Skipping count for stack.
	StStatus             int            `json:"stStatus"`             // Stack status(1: enabled - default; 0: disabled)
	StFilter             string         `json:"stFilter"`             // Stack string filter.
	CtxKeys              []interface{}  `json:"ctxKeys"`              // Context keys for logging, which is used for value retrieving from context.
	HeaderPrint          bool           `json:"header"`               // Print header or not(true in default).
	StdoutPrint          bool           `json:"stdout"`               // Output to stdout or not(true in default).
	LevelPrefixes        map[int]string `json:"levelPrefixes"`        // Logging level to its prefix string mapping.
	RotateSize           int64          `json:"rotateSize"`           // Rotate the logging file if its size > 0 in bytes.
	RotateExpire         time.Duration  `json:"rotateExpire"`         // Rotate the logging file if its mtime exceeds this duration.
	RotateBackupLimit    int            `json:"rotateBackupLimit"`    // Max backup for rotated files, default is 0, means no backups.
	RotateBackupExpire   time.Duration  `json:"rotateBackupExpire"`   // Max expires for rotated files, which is 0 in default, means no expiration.
	RotateBackupCompress int            `json:"rotateBackupCompress"` // Compress level for rotated files using gzip algorithm. It's 0 in default, means no compression.
	RotateCheckInterval  time.Duration  `json:"rotateCheckInterval"`  // Asynchronously checks the backups and expiration at intervals. It's 1 hour in default.
	StdoutColorDisabled  bool           `json:"stdoutColorDisabled"`  // Logging level prefix with color to writer or not (false in default).
	WriterColorEnable    bool           `json:"writerColorEnable"`    // Logging level prefix with color to writer or not (false in default).
}

Config is the configuration object for logger.

func DefaultConfig

func DefaultConfig() Config

DefaultConfig returns the default configuration for logger.

type Handler

type Handler func(ctx context.Context, in *HandlerInput)

Handler is function handler for custom logging content outputs.

type HandlerInput

type HandlerInput struct {
	Logger      *Logger       // Logger.
	Buffer      *bytes.Buffer // Buffer for logging content outputs.
	Time        time.Time     // Logging time, which is the time that logging triggers.
	TimeFormat  string        // Formatted time string, like "2016-01-09 12:00:00".
	Color       int           // Using color, like COLOR_RED, COLOR_BLUE, etc.
	Level       int           // Using level, like LEVEL_INFO, LEVEL_ERRO, etc.
	LevelFormat string        // Formatted level string, like "DEBU", "ERRO", etc.
	CallerFunc  string        // The source function name that calls logging.
	CallerPath  string        // The source file path and its line number that calls logging.
	CtxStr      string        // The retrieved context value string from context.
	Prefix      string        // Custom prefix string for logging content.
	Content     string        // Content is the main logging content that passed by you.
	IsAsync     bool          // IsAsync marks it is in asynchronous logging.
	// contains filtered or unexported fields
}

HandlerInput is the input parameter struct for logging Handler.

func (*HandlerInput) Next

func (i *HandlerInput) Next(ctx context.Context)

Next calls the next logging handler in middleware way.

func (*HandlerInput) String

func (i *HandlerInput) String(withColor ...bool) string

String returns the logging content formatted by default logging handler.

type Logger

type Logger struct {
	// contains filtered or unexported fields
}

Logger is the struct for logging management.

func Async

func Async(enabled ...bool) *Logger

Async is a chaining function, which enables/disables async logging output feature.

func Cat

func Cat(category string) *Logger

Cat is a chaining function, which sets the category to `category` for current logging content output.

func DefaultLogger

func DefaultLogger() *Logger

DefaultLogger returns the default logger.

func Expose

func Expose() *Logger

Expose returns the default logger of package glog.

func File

func File(pattern string) *Logger

File is a chaining function, which sets file name `pattern` for the current logging content output.

func Header(enabled ...bool) *Logger

Header is a chaining function, which enables/disables log header for the current logging content output. It's enabled in default.

func Instance

func Instance(name ...string) *Logger

Instance returns an instance of Logger with default settings. The parameter `name` is the name for the instance.

func Level

func Level(level int) *Logger

Level is a chaining function, which sets logging level for the current logging content output.

func LevelStr

func LevelStr(levelStr string) *Logger

LevelStr is a chaining function, which sets logging level for the current logging content output using level string.

func Line

func Line(long ...bool) *Logger

Line is a chaining function, which enables/disables printing its caller file along with its line number. The parameter `long` specified whether print the long absolute file path, eg: /a/b/c/d.go:23.

func New

func New() *Logger

New creates and returns a custom logger.

func NewWithWriter

func NewWithWriter(writer io.Writer) *Logger

NewWithWriter creates and returns a custom logger with io.Writer.

func Path

func Path(path string) *Logger

Path is a chaining function, which sets the directory path to `path` for current logging content output.

func Skip

func Skip(skip int) *Logger

Skip is a chaining function, which sets stack skip for the current logging content output. It also affects the caller file path checks when line number printing enabled.

func Stack

func Stack(enabled bool, skip ...int) *Logger

Stack is a chaining function, which sets stack options for the current logging content output .

func StackWithFilter

func StackWithFilter(filter string) *Logger

StackWithFilter is a chaining function, which sets stack filter for the current logging content output .

func Stdout

func Stdout(enabled ...bool) *Logger

Stdout is a chaining function, which enables/disables stdout for the current logging content output. It's enabled in default.

func To

func To(writer io.Writer) *Logger

To is a chaining function, which redirects current logging content output to the sepecified `writer`.

func (*Logger) AppendCtxKeys

func (l *Logger) AppendCtxKeys(keys ...interface{})

AppendCtxKeys appends extra keys to logger. It ignores the key if it is already appended to the logger previously.

func (*Logger) Async

func (l *Logger) Async(enabled ...bool) *Logger

Async is a chaining function, which enables/disables async logging output feature.

func (*Logger) Cat

func (l *Logger) Cat(category string) *Logger

Cat is a chaining function, which sets the category to `category` for current logging content output. Param `category` can be hierarchical, eg: module/user.

func (*Logger) Clone

func (l *Logger) Clone() *Logger

Clone returns a new logger, which is the clone the current logger. It's commonly used for chaining operations.

func (*Logger) Critical

func (l *Logger) Critical(ctx context.Context, v ...interface{})

Critical prints the logging content with [CRIT] header and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Criticalf

func (l *Logger) Criticalf(ctx context.Context, format string, v ...interface{})

Criticalf prints the logging content with [CRIT] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Debug

func (l *Logger) Debug(ctx context.Context, v ...interface{})

Debug prints the logging content with [DEBU] header and newline.

func (*Logger) Debugf

func (l *Logger) Debugf(ctx context.Context, format string, v ...interface{})

Debugf prints the logging content with [DEBU] header, custom format and newline.

func (*Logger) Error

func (l *Logger) Error(ctx context.Context, v ...interface{})

Error prints the logging content with [ERRO] header and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Errorf

func (l *Logger) Errorf(ctx context.Context, format string, v ...interface{})

Errorf prints the logging content with [ERRO] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Fatal

func (l *Logger) Fatal(ctx context.Context, v ...interface{})

Fatal prints the logging content with [FATA] header and newline, then exit the current process.

func (*Logger) Fatalf

func (l *Logger) Fatalf(ctx context.Context, format string, v ...interface{})

Fatalf prints the logging content with [FATA] header, custom format and newline, then exit the current process.

func (*Logger) File

func (l *Logger) File(file string) *Logger

File is a chaining function, which sets file name `pattern` for the current logging content output.

func (*Logger) GetConfig

func (l *Logger) GetConfig() Config

GetConfig returns the configuration of current Logger.

func (*Logger) GetCtxKeys

func (l *Logger) GetCtxKeys() []interface{}

GetCtxKeys retrieves and returns the context keys for logging.

func (*Logger) GetFlags

func (l *Logger) GetFlags() int

GetFlags returns the flags of logger.

func (*Logger) GetLevel

func (l *Logger) GetLevel() int

GetLevel returns the logging level value.

func (*Logger) GetLevelPrefix

func (l *Logger) GetLevelPrefix(level int) string

GetLevelPrefix returns the prefix string for specified level.

func (*Logger) GetPath

func (l *Logger) GetPath() string

GetPath returns the logging directory path for file logging. It returns empty string if no directory path set.

func (*Logger) GetStack

func (l *Logger) GetStack(skip ...int) string

GetStack returns the caller stack content, the optional parameter `skip` specify the skipped stack offset from the end point.

func (*Logger) GetWriter

func (l *Logger) GetWriter() io.Writer

GetWriter returns the customized writer object, which implements the io.Writer interface. It returns nil if no writer previously set.

func (*Logger) Header

func (l *Logger) Header(enabled ...bool) *Logger

Header is a chaining function, which enables/disables log header for the current logging content output. It's enabled in default.

func (*Logger) Info

func (l *Logger) Info(ctx context.Context, v ...interface{})

Info prints the logging content with [INFO] header and newline.

func (*Logger) Infof

func (l *Logger) Infof(ctx context.Context, format string, v ...interface{})

Infof prints the logging content with [INFO] header, custom format and newline.

func (*Logger) Level

func (l *Logger) Level(level int) *Logger

Level is a chaining function, which sets logging level for the current logging content output.

func (*Logger) LevelStr

func (l *Logger) LevelStr(levelStr string) *Logger

LevelStr is a chaining function, which sets logging level for the current logging content output using level string.

func (*Logger) Line

func (l *Logger) Line(long ...bool) *Logger

Line is a chaining function, which enables/disables printing its caller file path along with its line number. The parameter `long` specified whether print the long absolute file path, eg: /a/b/c/d.go:23, or else short one: d.go:23.

func (*Logger) Notice

func (l *Logger) Notice(ctx context.Context, v ...interface{})

Notice prints the logging content with [NOTI] header and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Noticef

func (l *Logger) Noticef(ctx context.Context, format string, v ...interface{})

Noticef prints the logging content with [NOTI] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Panic

func (l *Logger) Panic(ctx context.Context, v ...interface{})

Panic prints the logging content with [PANI] header and newline, then panics.

func (*Logger) Panicf

func (l *Logger) Panicf(ctx context.Context, format string, v ...interface{})

Panicf prints the logging content with [PANI] header, custom format and newline, then panics.

func (*Logger) Path

func (l *Logger) Path(path string) *Logger

Path is a chaining function, which sets the directory path to `path` for current logging content output.

Note that the parameter `path` is a directory path, not a file path.

func (*Logger) Print

func (l *Logger) Print(ctx context.Context, v ...interface{})

Print prints `v` with newline using fmt.Sprintln. The parameter `v` can be multiple variables.

func (*Logger) PrintStack

func (l *Logger) PrintStack(ctx context.Context, skip ...int)

PrintStack prints the caller stack, the optional parameter `skip` specify the skipped stack offset from the end point.

func (*Logger) Printf

func (l *Logger) Printf(ctx context.Context, format string, v ...interface{})

Printf prints `v` with format `format` using fmt.Sprintf. The parameter `v` can be multiple variables.

func (*Logger) SetAsync

func (l *Logger) SetAsync(enabled bool)

SetAsync enables/disables async logging output feature.

func (*Logger) SetConfig

func (l *Logger) SetConfig(config Config) error

SetConfig set configurations for the logger.

func (*Logger) SetConfigWithMap

func (l *Logger) SetConfigWithMap(m map[string]interface{}) error

SetConfigWithMap set configurations with map for the logger.

func (*Logger) SetCtxKeys

func (l *Logger) SetCtxKeys(keys ...interface{})

SetCtxKeys sets the context keys for logger. The keys is used for retrieving values from context and printing them to logging content.

Note that multiple calls of this function will overwrite the previous set context keys.

func (*Logger) SetDebug

func (l *Logger) SetDebug(debug bool)

SetDebug enables/disables the debug level for logger. The debug level is enabled in default.

func (*Logger) SetFile

func (l *Logger) SetFile(pattern string)

SetFile sets the file name `pattern` for file logging. Datetime pattern can be used in `pattern`, eg: access-{Ymd}.log. The default file name pattern is: Y-m-d.log, eg: 2018-01-01.log

func (*Logger) SetFlags

func (l *Logger) SetFlags(flags int)

SetFlags sets extra flags for logging output features.

func (*Logger) SetHandlers

func (l *Logger) SetHandlers(handlers ...Handler)

SetHandlers sets the logging handlers for current logger.

func (*Logger) SetHeaderPrint

func (l *Logger) SetHeaderPrint(enabled bool)

SetHeaderPrint sets whether output header of the logging contents, which is true in default.

func (*Logger) SetLevel

func (l *Logger) SetLevel(level int)

SetLevel sets the logging level. Note that levels ` LEVEL_CRIT | LEVEL_PANI | LEVEL_FATA ` cannot be removed for logging content, which are automatically added to levels.

func (*Logger) SetLevelPrefix

func (l *Logger) SetLevelPrefix(level int, prefix string)

SetLevelPrefix sets the prefix string for specified level.

func (*Logger) SetLevelPrefixes

func (l *Logger) SetLevelPrefixes(prefixes map[int]string)

SetLevelPrefixes sets the level to prefix string mapping for the logger.

func (*Logger) SetLevelStr

func (l *Logger) SetLevelStr(levelStr string) error

SetLevelStr sets the logging level by level string.

func (*Logger) SetPath

func (l *Logger) SetPath(path string) error

SetPath sets the directory path for file logging.

func (*Logger) SetPrefix

func (l *Logger) SetPrefix(prefix string)

SetPrefix sets prefix string for every logging content. Prefix is part of header, which means if header output is shut, no prefix will be output.

func (*Logger) SetStack

func (l *Logger) SetStack(enabled bool)

SetStack enables/disables the stack feature in failure logging outputs.

func (*Logger) SetStackFilter

func (l *Logger) SetStackFilter(filter string)

SetStackFilter sets the stack filter from the end point.

func (*Logger) SetStackSkip

func (l *Logger) SetStackSkip(skip int)

SetStackSkip sets the stack offset from the end point.

func (*Logger) SetStdoutColorDisabled

func (l *Logger) SetStdoutColorDisabled(disabled bool)

SetStdoutColorDisabled disables stdout logging with color.

func (*Logger) SetStdoutPrint

func (l *Logger) SetStdoutPrint(enabled bool)

SetStdoutPrint sets whether output the logging contents to stdout, which is true in default.

func (*Logger) SetWriter

func (l *Logger) SetWriter(writer io.Writer)

SetWriter sets the customized logging `writer` for logging. The `writer` object should implement the io.Writer interface. Developer can use customized logging `writer` to redirect logging output to another service, eg: kafka, mysql, mongodb, etc.

func (*Logger) SetWriterColorEnable

func (l *Logger) SetWriterColorEnable(enabled bool)

SetWriterColorEnable enables file/writer logging with color.

func (*Logger) Skip

func (l *Logger) Skip(skip int) *Logger

Skip is a chaining function, which sets stack skip for the current logging content output. It also affects the caller file path checks when line number printing enabled.

func (*Logger) Stack

func (l *Logger) Stack(enabled bool, skip ...int) *Logger

Stack is a chaining function, which sets stack options for the current logging content output .

func (*Logger) StackWithFilter

func (l *Logger) StackWithFilter(filter string) *Logger

StackWithFilter is a chaining function, which sets stack filter for the current logging content output .

func (*Logger) Stdout

func (l *Logger) Stdout(enabled ...bool) *Logger

Stdout is a chaining function, which enables/disables stdout for the current logging content output. It's enabled in default.

func (*Logger) To

func (l *Logger) To(writer io.Writer) *Logger

To is a chaining function, which redirects current logging content output to the specified `writer`.

func (*Logger) Warning

func (l *Logger) Warning(ctx context.Context, v ...interface{})

Warning prints the logging content with [WARN] header and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Warningf

func (l *Logger) Warningf(ctx context.Context, format string, v ...interface{})

Warningf prints the logging content with [WARN] header, custom format and newline. It also prints caller stack info if stack feature is enabled.

func (*Logger) Write

func (l *Logger) Write(p []byte) (n int, err error)

Write implements the io.Writer interface. It just prints the content using Print.

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