How to use write method of logger Package

Best Gauge code snippet using logger.write

log.go

Source:log.go

...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{}) {...

logger.go

Source:logger.go

...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)...

write

Using AI Code Generation

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}

write

Using AI Code Generation

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}

write

Using AI Code Generation

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

write

Using AI Code Generation

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

write

Using AI Code Generation

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}

write

Using AI Code Generation

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("

write

Using AI Code Generation

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}

write

Using AI Code Generation

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}

write

Using AI Code Generation

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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