hlog4g

hlog4g

hlog4g is a Simplified implementation of Leveled logs for the Go language (refer google glog).

Example

create a new test file main.go, and input the following codes

package main

import (
    "github.com/hooto/hlog4g/hlog"
)

func main() {

    // API:Print
    hlog.Print("info", "started")
    hlog.Print("error", "the error code/message: ", 400, "/", "bad request")

    // API::Printf
    hlog.Printf("error", "the error code/message: %d/%s", 400, "bad request")

    select {}
}

build the main.go file, run it and output the log into stderr console

go build main.go
./main -logtostderr=true
I 2016-04-30 22:24:26.463605 main.go:10] started
E 2016-04-30 22:24:26.463620 main.go:11] the error code/message: 400/bad request
E 2016-04-30 22:24:26.463628 main.go:14] the error code/message: 400/bad request

or run it and output the log into file

./main -log_dir="/var/log/"

the output file name will formated like this

/var/log/{program name}.{hostname}.{user name}.log.{level tag}.{date}-{time}.{pid}

log levels

the default log levels are:

You can also define your custom levels:

hlog.LevelConfig([]string{"warn", "error", "fatal"})

Setting Flags

The flags influence hlog4g's output behavior by passing on the command line. For example, if you want to turn the flag --logtostderr on, you can start your application with the following command line:

./your_application --logtostderr=true

The following flags are most commonly used:

Licensing

Licensed under the Apache License, Version 2.0