Introduction

Introduction

BLog4go is an efficient logging library written in the Go programming language, providing logging hook, log rotate, filtering and formatting log message.

BLog4go 是高性能日志库。创新地使用“边解析边输出”方法进行日志输出，同时支持回调函数、日志淘汰和配置文件。可以解决高并发，调用日志函数频繁的情境下，日志库造成的性能问题。

Features

• Partially write to the bufio.Writer as soon as posible while formatting message to improve performance
• Support different logging output file for different logging level
• Support configure with files in xml format
• Configurable logrotate strategy
• Call user defined hook in asynchronous mode for every logging action
• Adjustable message formatting
• Configurable logging behavier when looging on the fly without restarting
• Suit configuration to the environment when logging start
• Try best to get every done in background
• File writer can be configured according to given config file
• Different output writers
  • Console writer
  • File writer
  • Socket writer

Quick-start

package main

import (
    log "github.com/YoungPioneers/blog4go"
    "fmt"
    "os"
)

// optionally set user defined hook for logging
type MyHook struct {
    something string
}

// when log-level exceed level, call the hook
// level is the level associate with that logging action.
// message is the formatted string already written.
func (self *MyHook) Fire(level log.Level, message string) {
    fmt.Println(message)
}

func main() {
    // init a file write using xml config file
    err := log.NewFileWriterFromConfigAsFile("config.xml")
    if nil != err {
        fmt.Println(err.Error())
        os.Exit(1)
    }
    defer log.Close()

    // initialize your hook instance
    hook := new(MyHook)
    log.SetHook(hook) // writersFromConfig can be replaced with writers
    log.SetHookLevel(log.INFO)

    // optionally set output colored
    log.SetColored(true)

    log.Debugf("Good morning, %s", "eddie")
    log.Warn("It's time to have breakfast")

}

config.xml

Installation

If you don't have the Go development environment installed, visit the Getting Started document and follow the instructions. Once you're ready, execute the following command:

go get -u github.com/YoungPioneers/blog4go

Benchmark

I do some benchmark on a HDD disk comparing amoung fmt,blog4go,seelog,logrus. Benchmark Code

BenchmarkBlog4goSingleGoroutine-4                    1000000          1087 ns/op
BenchmarkBlog4goMultiGoroutine-4                       30000         56569 ns/op
BenchmarkFmtFormatSingleGoroutine-4                   300000          5104 ns/op
BenchmarkFmtFormatWithTimecacheSingleGoroutine-4      300000          4256 ns/op
BenchmarkFmtFormatWithTimecacheMultiGoroutine-4         3000        509579 ns/op
BenchmarkLogrusSingleGoroutine-4                      100000         13757 ns/op
BenchmarkLogrusWithTimecacheSingleGoroutine-4         100000         12752 ns/op
BenchmarkLogrusWithTimecacheMultiGoroutine-4            1000       2049809 ns/op
BenchmarkSeelogSingleGoroutine-4                       50000         32846 ns/op
BenchmarkSeelogMultiGoroutine-4                         1000       3191334 ns/op

It shows that blog4go can write log very fast, especially in situation with multi goroutines running at the same time~

Documentation

TODO

Examples

Full examples please view EXAMPLES

Changelog