This repository is reconstructed from alecthomas's log4go, which is a logging package similar to log4j for the Go programming language.
Two new features are supported, one is Json config style, and the other is deferent output accordding to category.
- Log to console
- Log to file, support rotate by size or time
- log to network, support tcp and udp
- support xml config
- Support Json style configuration
- Add Category for log
- Classify your logs for different output and different usage.
- Compatible with the old
First, get the code from this repo.
go get github.com/panho66/log4go
Then import it to you project.
import log "github.com/panho66/log4go"
The config file is optional, if you don't set the config file, it would use the default console config.
Here it is a Json config example:
{
"console": {
"enable": true, // wether output the log
"level": "FINE" // log level: FINE, DEBUG, TRACE, INFO, WARNING,ERROR, CRITICAL
},
"files": [{
"enable": true,
"level": "DEBUG",
"filename":"./test.log",
"category": "Test", // different category log to different files
"pattern": "[%D %T] [%C] [%L] (%S) %M" // log output formmat
},{
"enable": false,
"level": "DEBUG",
"filename":"rotate_test.log",
"category": "TestRotate",
"pattern": "[%D %T] [%C] [%L] (%S) %M",
"rotate": true, // wether rotate the log
"maxsize": "500M",
"maxlines": "10K",
"daily": true
}],
"sockets": [{
"enable": false,
"level": "DEBUG",
"category": "TestSocket",
"pattern": "[%D %T] [%C] [%L] (%S) %M",
"addr": "127.0.0.1:12124",
"protocol":"udp"
}]
}
Code example:
package main
import (
log "github.com/panho66/log4go"
)
func main() {
// load config file, it's optional
// or log.LoadConfiguration("./example.json", "json")
// config file could be json or xml
log.LoadConfiguration("./example.json")
log.LOGGER("Test").Info("category Test info test ...")
log.LOGGER("Test").Info("category Test info test message: %s", "new test msg")
log.LOGGER("Test").Debug("category Test debug test ...")
// Other category not exist, test
log.LOGGER("Other").Debug("category Other debug test ...")
// socket log test
log.LOGGER("TestSocket").Debug("category TestSocket debug test ...")
// original log4go test
log.Info("nomal info test ...")
log.Debug("nomal debug test ...")
log.Close()
}
The output like:
[2017/11/15 14:35:11 CST] [Test] [INFO] (main.main:15) category Test info test ...
[2017/11/15 14:35:11 CST] [Test] [INFO] (main.main:16) category Test info test message: new test msg
[2017/11/15 14:35:11 CST] [Test] [DEBG] (main.main:17) category Test debug test ...
[2017/11/15 14:35:11 CST] [DEFAULT] [INFO] (main.main:26) nomal info test ...
[2017/11/15 14:35:11 CST] [DEFAULT] [DEBG] (main.main:27) nomal debug test ...
Thanks alecthomas for providing the original resource.
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