glog

package
v0.1.1 Latest Latest
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 Go to latest Published: Mar 1, 2021 License: Apache-2.0 Imports: 27 Imported by: 0

Documentation

Overview

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

Example (Context) 
package main

import (
	"context"
	"gitee.com/KotlinToGo/pkg/g"
)

func main() {
	ctx := context.WithValue(context.Background(), "Trace-Id", "123456789")
	g.Log().Ctx(ctx).Error("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 (
	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_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 (
	// Default group name for instance usage.
	DefaultName = "default"
)

Variables

This section is empty.

Functions

func Critical 

func Critical(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(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(v ...interface{})

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

func Debugf 

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

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

func Error 

func Error(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(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(v ...interface{})

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

func Fatalf 

func Fatalf(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 logger.

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(v ...interface{})

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

func Infof 

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

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

func Notice 

func Notice(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(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(v ...interface{})

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

func Panicf 

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

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

func Print 

func Print(v ...interface{})

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

func PrintStack 

func PrintStack(skip ...int)

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

func Printf 

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

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

func Println 

func Println(v ...interface{})

See Print.

func SetAsync 

func SetAsync(enabled bool)

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

func SetConfig 

func SetConfig(config Config) error

SetConfig set configurations for the logger.

func SetConfigWithMap 

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

SetConfigWithMap set configurations with map for the logger.

func SetCtxKeys 

func 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 SetDebug 

func SetDebug(debug bool)

SetDebug enables/disables the debug level for default logger. 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 SetEnabled 

func SetEnabled(enabled bool)

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 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 logger.

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 Warning 

func Warning(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(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 {
	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 for logging file.
	Level                int            `json:"level"`                // Output level.
	Prefix               string         `json:"prefix"`               // Prefix string for every logging content.
	StSkip               int            `json:"stSkip"`               // Skip 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 expire 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"`  // Asynchronizely checks the backups and expiration at intervals. It's 1 hour in default.
}

Config is the configuration object for logger.

func DefaultConfig 

func DefaultConfig() Config

DefaultConfig returns the default configuration 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 Ctx 

func Ctx(ctx context.Context, keys ...interface{}) *Logger

Ctx is a chaining function, which sets the context for current logging. The parameter <keys> specifies the context keys for retrieving values.

func DefaultLogger 

func DefaultLogger() *Logger

Default returns the default logger.

func Expose 

func Expose() *Logger

Expose returns the default logger of 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

StdPrint 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) 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(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(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) Ctx 

func (l *Logger) Ctx(ctx context.Context, keys ...interface{}) *Logger

Ctx is a chaining function, which sets the context for current logging.

func (*Logger) Debug 

func (l *Logger) Debug(v ...interface{})

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

func (*Logger) Debugf 

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

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

func (*Logger) Error 

func (l *Logger) Error(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(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(v ...interface{})

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

func (*Logger) Fatalf 

func (l *Logger) Fatalf(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) 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(v ...interface{})

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

func (*Logger) Infof 

func (l *Logger) Infof(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(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(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(v ...interface{})

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

func (*Logger) Panicf 

func (l *Logger) Panicf(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(v ...interface{})

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

func (*Logger) PrintStack 

func (l *Logger) PrintStack(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(format string, v ...interface{})

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

func (*Logger) Println 

func (l *Logger) Println(v ...interface{})

Println is alias of Print. See Print.

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) 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.

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) 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 implements the io.Writer interface. Developer can use customized logging <writer> to redirect logging output to another service, eg: kafka, mysql, mongodb, etc.

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(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(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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