How to use write method of logger Package

Best Gauge code snippet using logger.write

log.go

Source:log.go Github

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...111 WriteMessage(service, instance, prefix, logTime string, level Level, file string, line int, msg string)112}113type logger struct {114 mu sync.Mutex115 writers map[string]Writer116 prefix string117 service string118 instance string119 printStack bool120 stackLevel Level121 printPath bool122}123func New(opts ...Option) Logger {124 var l = &logger{}125 l.writers = make(map[string]Writer)126 l.stackLevel = LevelPanic127 l.printStack = false128 l.printPath = true129 for _, opt := range opts {130 opt.Apply(l)131 }132 return l133}134func (this *logger) SetService(service string) {135 this.mu.Lock()136 defer this.mu.Unlock()137 this.service = service138}139func (this *logger) Service() string {140 this.mu.Lock()141 defer this.mu.Unlock()142 return this.service143}144func (this *logger) SetInstance(instance string) {145 this.mu.Lock()146 defer this.mu.Unlock()147 this.instance = instance148}149func (this *logger) Instance() string {150 this.mu.Lock()151 defer this.mu.Unlock()152 return this.instance153}154func (this *logger) SetPrefix(prefix string) {155 this.mu.Lock()156 defer this.mu.Unlock()157 this.prefix = prefix158}159func (this *logger) Prefix() string {160 this.mu.Lock()161 defer this.mu.Unlock()162 return this.prefix163}164func (this *logger) SetStackLevel(level Level) {165 this.mu.Lock()166 defer this.mu.Unlock()167 this.stackLevel = level168}169func (this *logger) StackLevel() Level {170 this.mu.Lock()171 defer this.mu.Unlock()172 return this.stackLevel173}174func (this *logger) EnableStack() {175 this.mu.Lock()176 defer this.mu.Unlock()177 this.printStack = true178}179func (this *logger) DisableStack() {180 this.mu.Lock()181 defer this.mu.Unlock()182 this.printStack = false183}184func (this *logger) PrintStack() bool {185 this.mu.Lock()186 defer this.mu.Unlock()187 return this.printStack188}189func (this *logger) EnablePath() {190 this.mu.Lock()191 defer this.mu.Unlock()192 this.printPath = true193}194func (this *logger) DisablePath() {195 this.mu.Lock()196 defer this.mu.Unlock()197 this.printPath = false198}199func (this *logger) PrintPath() bool {200 this.mu.Lock()201 defer this.mu.Unlock()202 return this.printPath203}204func (this *logger) WriteMessage(callDepth int, level Level, msg string) {205 this.mu.Lock()206 defer this.mu.Unlock()207 var file string208 var line int209 _, file, line, ok := runtime.Caller(callDepth)210 if ok {211 if this.printPath == false {212 _, file = filepath.Split(file)213 }214 } else {215 file = "???"216 line = -1217 }218 if this.printStack && level >= this.stackLevel {219 var buf [4096]byte220 n := runtime.Stack(buf[:], true)221 msg += string(buf[:n])222 msg += "\n"223 }224 var now = time.Now()225 var logTime = now.Format("2006/01/02 15:04:05.000000")226 for _, w := range this.writers {227 if w.Level() <= level {228 w.WriteMessage(this.service, this.instance, this.prefix, logTime, level, file, line, msg)229 }230 }231}232func (this *logger) AddWriter(name string, w Writer) {233 this.mu.Lock()234 defer this.mu.Unlock()235 this.writers[name] = w236}237func (this *logger) RemoveWriter(name string) {238 this.mu.Lock()239 defer this.mu.Unlock()240 var w = this.writers[name]241 if w != nil {242 w.Close()243 }244 delete(this.writers, name)245}246func (this *logger) Logf(format string, args ...interface{}) {247 this.WriteMessage(2, LevelTrace, fmt.Sprintf(format, args...))248}249func (this *logger) Logln(args ...interface{}) {250 this.WriteMessage(2, LevelTrace, fmt.Sprintln(args...))251}252func (this *logger) Log(args ...interface{}) {253 this.WriteMessage(2, LevelTrace, fmt.Sprintln(args...))254}255func (this *logger) L(format string, args ...interface{}) {256 this.WriteMessage(2, LevelTrace, fmt.Sprintf(format, args...))257}258func (this *logger) Tracef(format string, args ...interface{}) {...

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logger.go

Source:logger.go Github

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...26func NewFmtLogger() *fmtLogger {27 return &fmtLogger{}28}29func (logger *fmtLogger) Debug(v interface{}) {30 logger.writeLog(fmt.Sprint(v), "debug")31}32func (logger *fmtLogger) Info(v interface{}) {33 logger.writeLog(fmt.Sprint(v), "info")34}35func (logger *fmtLogger) Warn(v interface{}) {36 logger.writeLog(fmt.Sprint(v), "warn")37}38func (logger *fmtLogger) Error(err error, v interface{}) {39 logger.writeLog(fmt.Sprint(v, err), "error")40}41func (logger *fmtLogger) writeLog(log string, level string) {42 logStr := time.Now().Format(defaultFullTimeLayout) + " " + log43 fmt.Println(logStr)44}45/************************* FileLogger *******************************/46func NewFileLogger(filePath string) *fileLogger {47 if filePath == "" || !fileExists(filePath) {48 filePath = getCurrentDirectory()49 }50 logger := &fileLogger{filePath: filePath}51 return logger52}53func (logger *fileLogger) Debug(v interface{}) {54 logger.writeLog(fmt.Sprint(v), "debug")55}56func (logger *fileLogger) Info(v interface{}) {57 logger.writeLog(fmt.Sprint(v), "info")58}59func (logger *fileLogger) Warn(v interface{}) {60 logger.writeLog(fmt.Sprint(v), "warn")61}62func (logger *fileLogger) Error(err error, v interface{}) {63 logger.writeLog(fmt.Sprint(v, err), "error")64}65func (logger *fileLogger) writeLog(log string, level string) {66 filePath := logger.filePath + "dottask_" + level67 filePath += "_" + time.Now().Format(defaultDateFormatForFileName) + ".log"68 logStr := time.Now().Format(defaultFullTimeLayout) + " " + log69 logStr += "\r\n"70 var mode os.FileMode71 flag := syscall.O_RDWR | syscall.O_APPEND | syscall.O_CREAT72 mode = 066673 file, err := os.OpenFile(filePath, flag, mode)74 defer file.Close()75 if err != nil {76 fmt.Println(filePath, err)77 return78 }79 file.WriteString(logStr)...

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write

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1import (2func main() {3 f, err := os.OpenFile("log.txt", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)4 if err != nil {5 log.Fatal(err)6 }7 defer f.Close()8 log.SetOutput(f)9 log.Println("log message to file")10}11import (12func main() {13 f, err := os.OpenFile("log.txt", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)14 if err != nil {15 log.Fatal(err)16 }17 defer f.Close()18 log.SetOutput(f)19 log.SetFlags(log.LstdFlags | log.Lshortfile)20 log.Println("log message to file")21}22import (23func main() {24 f, err := os.OpenFile("log.txt", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)25 if err != nil {26 log.Fatal(err)27 }28 defer f.Close()29 log.SetOutput(f)30 log.SetFlags(log.LstdFlags | log.Lshortfile)31 log.SetPrefix("TRACE: ")32 log.Println("log message to file")33}34import (35func main() {36 f, err := os.OpenFile("log.txt", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)37 if err != nil {38 log.Fatal(err)39 }40 defer f.Close()41 log.SetOutput(f)42 log.SetFlags(log.LstdFlags | log.Lshortfile)43 log.SetPrefix("TRACE: ")44 log.Fatalln("log message to file")45}

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write

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1import (2func main() {3logger := log.New(os.Stdout, "logger: ", log.Lshortfile)4logger.Println("This is a regular message.")5logger.Panicln("This is a panic.")6}7main.main()8import (9func main() {10logger := log.New(os.Stdout, "logger: ", log.Lshortfile)11logger.Println("This is a regular message.")12logger.Panicln("This is a panic.")13}14main.main()15import (16func main() {17logger := log.New(os.Stdout, "logger: ", log.Lshortfile)18logger.Println("This is a regular message.")19logger.Panicln("This is a panic.")20}21main.main()22import (23func main() {24logger := log.New(os.Stdout, "logger: ", log.Lshortfile)25logger.Println("This is a regular message.")26logger.Panicln("This is a panic.")27}

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write

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1import (2func main() {3 file, err := os.OpenFile("log.txt", os.O_RDWR, 0644)4 if err != nil {5 log.Fatalf("failed opening file: %s", err)6 }7 defer file.Close()8 logger := log.New(file, "prefix", log.LstdFlags)9 logger.Println("hello")10 logger.Println("world")11}12Related Posts: Golang - log.Fatal() vs log.Panic() vs log.Print()13Golang - log.New() method14Golang - log.Output() method15Golang - log.Panic() method16Golang - log.Panicf() method17Golang - log.Panicln() method18Golang - log.Print() method19Golang - log.Printf() method20Golang - log.Println() method21Golang - log.SetFlags() method22Golang - log.SetOutput() method23Golang - log.SetPrefix() method24Golang - log.Writer() method25Golang - log.Logger.Output() method26Golang - log.Logger.SetFlags() method27Golang - log.Logger.SetOutput() method28Golang - log.Logger.SetPrefix() method29Golang - log.Logger.Writer() method30Golang - log.Logger.Panic() method31Golang - log.Logger.Panicf() method32Golang - log.Logger.Panicln() method33Golang - log.Logger.Fatal() method34Golang - log.Logger.Fatalf() method35Golang - log.Logger.Fatalln() method36Golang - log.Logger.Print() method37Golang - log.Logger.Printf() method

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write

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1import (2func main() {3 f, err := os.Create("log.txt")4 if err != nil {5 log.Fatal(err)6 }7 log.SetOutput(f)8 log.Println("Hello, log file!")9 log.Fatal("Bye.")10}11import "log"12func main() {13 log.Panic("I'm bailing.")14}15log.Panic(0xc00008dfb8, 0x1, 0x1)16main.main()17import "log"18func main() {19 log.Panicln("I'm bailing.")20}21log.Panicln(0xc00008dfb8, 0x1, 0x1)22main.main()23The Panicf() method

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write

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1import (2func main() {3 file, err := os.OpenFile("log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)4 if err != nil {5 log.Fatalln("Failed to open log file:", err)6 }7 log.SetOutput(file)8 log.Println("This is a test log entry")9 file.Close()10}11import (12func main() {13 file, err := os.OpenFile("log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)14 if err != nil {15 log.Fatalln("Failed to open log file:", err)16 }17 log.SetOutput(file)18 log.SetPrefix("TRACE: ")19 log.SetFlags(log.Ldate | log.Lmicroseconds | log.Llongfile)20 log.Println("This is a test log entry")21 file.Close()22}

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write

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1import (2func main() {3 log.SetFlags(0)4 log.SetPrefix("ERROR: ")5 log.Print("Hello, log file!")6}7import (8func main() {9 log.SetFlags(log.LstdFlags | log.Lshortfile)10 log.Print("Hello, log file!")11}12import (13func main() {14 log.SetFlags(log.LstdFlags | log.Lshortfile)15 log.SetPrefix("ERROR: ")16 log.Print("Hello, log file!")17}18import (19func main() {20 log.SetFlags(log.LstdFlags | log.Lshortfile)21 log.SetPrefix("ERROR: ")22 log.Println("Hello, log file!")23}24import (25func main() {26 log.SetFlags(log.LstdFlags | log.Lshortfile)27 log.SetPrefix("ERROR: ")28 log.Printf("Hello, %s!", "log file")29}30import (31func main() {32 log.SetFlags(log.LstdFlags | log.Lshortfile)33 log.SetPrefix("ERROR: ")34 log.Fatalln("Hello, log file!")35}36import (37func main() {38 log.SetFlags(log.LstdFlags | log.Lshortfile)39 log.SetPrefix("ERROR: ")40 log.Panicln("Hello, log file!")41}42import (43func main() {44 file, err := os.OpenFile("logFile.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)45 if err != nil {46 log.Fatalln("failed to open log file:", err)47 }48 defer file.Close()49 log.SetOutput(file)50 log.SetFlags(log.LstdFlags | log.Lshortfile)51 log.SetPrefix("

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write

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1import (2func main() {3 file, err := os.Create("log.txt")4 if err != nil {5 log.Fatal(err)6 }7 log.SetOutput(file)8 log.Println("This is a log message")9}10import (11func main() {12 file, err := os.Create("log.txt")13 if err != nil {14 log.Fatal(err)15 }16 log.SetOutput(file)17 log.SetFlags(log.LstdFlags | log.Lshortfile)18 log.Println("This is a log message")19}20import (21func main() {22 log.SetOutput(os.Stdout)23 log.SetFlags(log.LstdFlags | log.Lshortfile)24 log.Println("This is a log message")25}

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write

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1import (2type Logger struct {3}4func NewLogger() *Logger {5 return &Logger{log.New(os.Stdout, "INFO: ", log.Lshortfile)}6}7func main() {8 l := NewLogger()9 l.Println("Hello, World!")10}11import (12type Logger struct {13}14func NewLogger() *Logger {15 return &Logger{log.New(os.Stdout, "INFO: ", log.Lshortfile)}16}17func main() {18 l := NewLogger()19 l.Printf("Hello, %s!", "World")20}21import (22type Logger struct {23}24func NewLogger() *Logger {25 return &Logger{log.New(os.Stdout, "INFO: ", log.Lshortfile)}26}27func main() {28 l := NewLogger()29 l.Fatalf("Hello, %s!", "World")30}

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1import "log"2func main() {3log.Println("this is a log message")4}5log.Fatal("this is a fatal log message")6log.Panic("this is a panic log message")7log.Panic(0xc0000b5f70, 0x1, 0x1)8main.main()9testing.(*T).Parallel(0xc0000b6000)10testing.runTests.func1(0xc0000b6000)11testing.tRunner(0xc0000b6000, 0xc0000b7d80)12testing.runTests(0xc0000b6000, 0x1071e00, 0x6, 0x6, 0x0)13testing.(*M).Run(0xc0000b6000, 0x0)14main.main()15testing.(*T).Parallel(0xc0000b6100)16testing.runTests.func1(0xc0000b6100

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