README.md

slog

Simple logger. Just import and use.

Install

go get github.com/umbrella-evgeny-nefedkin/slog

Usage

Import the library and use:

import "github.com/umbrella-evgeny-nefedkin/slog"

func main(){
    ...
    slog.SetLevel(slog.LvlAll) // default LvlNone
    slog.SetFormat(slog.FormatTimmed)
    slog.Info("any info")
    ...
}

or if you need show error trace in debug mode only:

import "github.com/umbrella-evgeny-nefedkin/slog"

func main(){

    ...
    slog.SetLevel(slog.LvlAll) // default LvlNone
    slog.SetFormat(slog.FormatTimmed)


    // main thread will be alive even if goroutine failed
    // but in debug mode main theread fail too with error trace 
    go func(){
        defer func(){
            if r := recover(); r != nil{
                slog.Infoln(r) // will show every time
                slog.DebugPanic(r) // will panic if application running in debug mode
            }
            return
        }()
                    
        ... some code ...
    }()
    
	....

}

Custom setting

Custom log format

    // import "github.com/umbrella-evgeny-nefedkin/slog"
    
    var TimeFormatted slog.Format = func() string{
    
        return fmt.Sprintf(`[%s] %%s`, time.Now().Format(time.RFC822))
    }
    
    slog.SetFormat(TimeFormatted)
    
    slog.Info("any info") // Output: [23 Jan 18 21:55 UTC] any info

build-in formats:

    slog.FormatTimed
    slog.FormatTimed_RFC822
    slog.FormatDefault

Custom log function

Using wrapper:

// import . "github.com/umbrella-evgeny-nefedkin/slog"

var myCutomFunction SLogger  = func(data ...interface{}) interface{} { fmt.Sprint(data...); return nil }
var myCutomLevel             = Level{"myCutomLevel", 5}

Wrap(&myCutomFunction, myCutomLevel, false)

SetLevel(LvlAll)

myCutomFunction("some data for print")

Using binding:

// import . "github.com/umbrella-evgeny-nefedkin/slog"

var myStdBindFun SLogger  = func(data ...interface{}) interface{} { fmt.Println(data...); return nil }


var myCustomDebugFunc SLogger
var myCustomDebugLevel   = Level{"myCustomDebugLevel", 5}
Bind(&myCustomDebugFunc, myStdBindFun, myCustomDebugLevel, false)

var myCustomNoticeFunc SLogger
var myCustomNoticeLevel  = Level{"myCustomNoticeLevel", 15}
Bind(&myCustomNoticeFunc, myStdBindFun, myCustomNoticeLevel, false)

myCustomDebugFunc("some debug data")
myCustomDebugFunc("some info data")

Function overriding:

Just use override-flag:

Wrap(&myCutomFunction, LvlInfo, TRUE)

or

Bind(&myCustomNoticeFunc, myStdBindFun, LvlInfo, TRUE)