glog

package
v2.7.8 Latest Latest
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 Go to latest Published: Oct 13, 2024 License: MIT Imports: 35 Imported by: 5

Documentation

Overview

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

Index

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 // 16
	LEVEL_INFO             // 32
	LEVEL_NOTI             // 64
	LEVEL_WARN             // 128
	LEVEL_ERRO             // 256
	LEVEL_CRIT             // 512
	LEVEL_PANI             // 1024
	LEVEL_FATA             // 2048
)

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 HandlerJson 

func HandlerJson(ctx context.Context, in *HandlerInput)

HandlerJson is a handler for output logging content as a single json string.

func HandlerStructure added in v2.7.2 

func HandlerStructure(ctx context.Context, in *HandlerInput)

HandlerStructure is a handler for output logging content as a structured string.

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 SetDefaultHandler 

func SetDefaultHandler(handler Handler)

SetDefaultHandler sets default handler for package.

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.
	TimeFormat           string         `json:"timeFormat"`           // Logging time format
	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).
	LevelPrint           bool           `json:"levelPrint"`           // Print level format string 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).
	// contains filtered or unexported fields
}

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.

func GetDefaultHandler 

func GetDefaultHandler() Handler

GetDefaultHandler returns the default handler of package.

type HandlerInput 

type HandlerInput struct {

	// Current Logger object.
	Logger *Logger

	// Buffer for logging content outputs.
	Buffer *bytes.Buffer

	// (ReadOnly) Logging time, which is the time that logging triggers.
	Time time.Time

	// Formatted time string for output, like "2016-01-09 12:00:00".
	TimeFormat string

	// (ReadOnly) Using color constant value, like COLOR_RED, COLOR_BLUE, etc.
	// Example: 34
	Color int

	// (ReadOnly) Using level, like LEVEL_INFO, LEVEL_ERRO, etc.
	// Example: 256
	Level int

	// Formatted level string for output, like "DEBU", "ERRO", etc.
	// Example: ERRO
	LevelFormat string

	// The source function name that calls logging, only available if F_CALLER_FN set.
	CallerFunc string

	// The source file path and its line number that calls logging,
	// only available if F_FILE_SHORT or F_FILE_LONG set.
	CallerPath string

	// The retrieved context value string from context, only available if Config.CtxKeys configured.
	// It's empty if no Config.CtxKeys configured.
	CtxStr string

	// Trace id, only available if OpenTelemetry is enabled, or else it's an empty string.
	TraceId string

	// Custom prefix string in logging content header part.
	// Note that, it takes no effect if HeaderPrint is disabled.
	Prefix string

	// Custom logging content for logging.
	Content string

	// The passed un-formatted values array to logger.
	Values []any

	// Stack string produced by logger, only available if Config.StStatus configured.
	// Note that there are usually multiple lines in stack content.
	Stack string

	// IsAsync marks it is in asynchronous logging.
	IsAsync bool
	// contains filtered or unexported fields
}

HandlerInput is the input parameter struct for logging Handler.

The logging content is consisted in: TimeFormat [LevelFormat] {TraceId} {CtxStr} Prefix CallerFunc CallerPath Content Values Stack

The header in the logging content is: TimeFormat [LevelFormat] {TraceId} {CtxStr} Prefix CallerFunc CallerPath

func (*HandlerInput) Next 

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

Next calls the next logging handler in middleware way.

func (*HandlerInput) String 

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

String returns the logging content formatted by default logging handler.

func (*HandlerInput) ValuesContent added in v2.7.2 

func (in *HandlerInput) ValuesContent() string

ValuesContent converts and returns values as string content.

type HandlerOutputJson 

type HandlerOutputJson struct {
	Time       string `json:""`           // Formatted time string, like "2016-01-09 12:00:00".
	TraceId    string `json:",omitempty"` // Trace id, only available if tracing is enabled.
	CtxStr     string `json:",omitempty"` // The retrieved context value string from context, only available if Config.CtxKeys configured.
	Level      string `json:""`           // Formatted level string, like "DEBU", "ERRO", etc. Eg: ERRO
	CallerPath string `json:",omitempty"` // The source file path and its line number that calls logging, only available if F_FILE_SHORT or F_FILE_LONG set.
	CallerFunc string `json:",omitempty"` // The source function name that calls logging, only available if F_CALLER_FN set.
	Prefix     string `json:",omitempty"` // Custom prefix string for logging content.
	Content    string `json:""`           // Content is the main logging content, containing error stack string produced by logger.
	Stack      string `json:",omitempty"` // Stack string produced by logger, only available if Config.StStatus configured.
}

HandlerOutputJson is the structure outputting logging content as single json.

type ILogger 

type ILogger interface {
	Print(ctx context.Context, v ...interface{})
	Printf(ctx context.Context, format string, v ...interface{})
	Debug(ctx context.Context, v ...interface{})
	Debugf(ctx context.Context, format string, v ...interface{})
	Info(ctx context.Context, v ...interface{})
	Infof(ctx context.Context, format string, v ...interface{})
	Notice(ctx context.Context, v ...interface{})
	Noticef(ctx context.Context, format string, v ...interface{})
	Warning(ctx context.Context, v ...interface{})
	Warningf(ctx context.Context, format string, v ...interface{})
	Error(ctx context.Context, v ...interface{})
	Errorf(ctx context.Context, format string, v ...interface{})
	Critical(ctx context.Context, v ...interface{})
	Criticalf(ctx context.Context, format string, v ...interface{})
	Panic(ctx context.Context, v ...interface{})
	Panicf(ctx context.Context, format string, v ...interface{})
	Fatal(ctx context.Context, v ...interface{})
	Fatalf(ctx context.Context, format string, v ...interface{})
}

ILogger is the API interface for logger.

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 a `shallow copy` of the current logger. Note that the attribute `config` of the cloned one is the shallow copy of current one.

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) SetLevelPrint 

func (l *Logger) SetLevelPrint(enabled bool)

SetLevelPrint sets whether output level string of the logging contents, which is true in default.

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) SetTimeFormat 

func (l *Logger) SetTimeFormat(timeFormat string)

SetTimeFormat sets the time format for the logging time.

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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