# logger (A logger package for Go)

This package is for logging messages to file.
The log format can be in json or can be normal.

Its prettly simple to use.

Create the logger Instance - Use ‘CreateLogger’ function
There are 5 methods available to log, all of these linked to a log level.

• Debug(format string, a …interface{})
• Info(format string, a …interface{})
• Warn(format string, a …interface{})
• Error(format string, a …interface{})
• Fatal(format string, a …interface{})

Each of the above functions are assoiated to 5 Loglevels.

• LDebug
• LInfo
• LWarn
• LError
• LFatal

Any of the log level functions can be called from any goroutine and the logging would not be affected.

# How to install

go get github.com/r-pai/logger

# How to use

import the package

import "github.com/r-pai/logger"

Create Logger in main or in init.

log := logger.CreateLogger("./", "Myapp", logger.LDebug)

Log the messages - 5 Types of LogLevels

 log.Debug("Starting Hello LDEBUG")
 log.Info("Starting Hello LINFO")
 log.Warn("Starting Hello LWARN")
 log.Error("Starting Hello LERROR")
 log.Fatal("Starting Hello LFATAL")

# Sample Code 1

package main
import ( 
        "github.com/r-pai/logger"
       )
//Create the logger instance
var log = logger.CreateLogger("./", "Myapp", logger.LDebug)
func main() {
    log.Debug("Starting Hello LDEBUG")
    log.Info("Starting Hello LINFO")
    log.Warn("Starting Hello LWARN")
    log.Error("Starting Hello LERROR")
    log.Fatal("Starting Hello LFATAL")
}

# Sample Code 2 - Log messages in go routines

package main
import (
    "github.com/r-pai/logger"
    "time"
)
func number() int {
    num := 15 * 5
    return num
}
func go1() {
    for i := 0; i < 1000; i++ {
        log.Info("%s %d", "go1 Log message", i)
        time.Sleep(400 * time.Millisecond)
    }
}
func go2() {
    for i := 1000; i < 3000; i++ {
        log.Info("%s %d", "go2 Log message", i)
        time.Sleep(100 * time.Millisecond)
    }
}
//Create the logger
var log *logger.GLogger
func init(){
    log = logger.CreateLogger("./", "Myapp", logger.LDebug)
    //constants from time package
    log.SetLogTimeFormat(time.RFC850) //set the time format
    //logout put can be in json format
    log.SetJSONLog(true)
}
//main entry point
func main() {
    go go1()
    go go2()
    for {
    }
}

# Loggeroutput

Sample output of file : MyApp_07-09-2019.log

Json Style output