log

Log

• Design
• Survey

Convention

• every package has a log registry and its default logger.
• logger should only register themselves in registry if it's a long lived one, i.e. server

Usage

See examples in handlers

In package, create package level var called log this saves import and also avoid people importing standard log. Use dlog as import alias because log is already used.

package main

import (
	"os"
	"time"

	dlog "github.com/dyweb/gommon/log"
	"github.com/dyweb/gommon/log/handlers/cli"
)

var logReg = dlog.NewRegistry()
var log = logReg.Logger()

func main() {
	dlog.SetHandler(cli.New(os.Stderr, true))

	if len(os.Args) > 1 {
		if os.Args[1] == "nocolor" || os.Args[1] == "no" {
			dlog.SetHandler(cli.NewNoColor(os.Stderr))
		}
	}

	log.Info("hi")
	log.Infof("open file %s", "foo.yml")
	log.InfoF("open",
		dlog.Str("file", "foo.yml"),
		dlog.Int("mode", 0666),
	)
	log.Warn("I am yellow")
	func() {
		defer func() {
			if r := recover(); r != nil {
				log.Info("recovered", r)
			}
		}()
		log.Panic("I just want to panic")
	}()
	dlog.SetLevel(dlog.DebugLevel)
	log.Debug("I will sleep for a while")
	time.Sleep(500 * time.Millisecond)
	log.Fatal("I am red")
}