APACHE LOGGING and Log4j - Java Forum...

APACHE LOGGINGand Log4j

Christian Grobmeier

@grobmeierhttp://www.grobmeier.de

ASF V. P. Logging Services

Why should you log?

ASFFIRE

BRIGADE

Log4j1, Log4j2log4php

Chainsawlog4netlog4cxx

CHALLENGES

SPEED!

Failsafe. Reliable.

Compability.

Taste.

L o g g i n g with Duke Java

Too much t a s t e . . . m a k e s headache!

Think on: log4j, logback, JUL,

TinyLog, AVSL

Pills: slf4j & Commons Logging

slf4j

Commons Logging

log4j 1

log4j 2logback JUL AVSL

Which pill?

Don‘t forget PAX!

Integrates well with:slf4j

log4j 1.xCommons Logging

log4j 2.0 is the

future of log4j

Why

log4j 2.0?

Instead:if(logger.isDebugEnabled()) logger.info("Hi, " + u.getA() + “ “ + u.getB());

Write:logger.info("Hi, {} {} ", u.getA(), u.getB());

API++

Marker:

Marker SQL_MARKER = MarkerManager.getMarker("SQL");

logger.debug( SQL_MARKER, "SELECT * FROM {}", table);

Better Filter

@Plugin(name = "Sandbox", type = "Core", elementType = "appender")

public class Mine extends AppenderBase {

private Mine(String name, Filter f) { super(name, f, null); } public void append(LogEvent e) { … }

Plugins

@PluginFactorypublic static Mine create( @PluginAttr("name") String n, @PluginElement("filters") Filter f) { return new Mine(n, f);}

Plugins

<appenders> <Console name="Console" target="SYSTEM_OUT"> <PatternLayout pattern="%d{HH:mm} %msg%n"/> </Console></appenders>

Configuration

{ "configuration": … "appenders": { "Console": { "name": "STDOUT", "PatternLayout": { "pattern": "%m%n" } }, ...

Configuration

ConfigurationReloading

<configuration monitorInterval="30">...</configuration>

SPEED!

log4j 1.x

logback

log4j 2.x

Disabled 5

2386

2116

2314

Logging Performance in ns

SPEED!Async Logging Power!

Again:

>18,000,000messages / second

On Solaris 10 (64bit) with JDK1.7.0_06, 4-core Xeon X5570 dual CPU @2.93Ghz with hyperthreading switched on (16 virtual cores)

WTF?

LMAXDISRUPTOR

removes the kernel need for locks on the CPU level

CHAINSAW

The story of

log4php

Community

Good times,

bad times

2000 2009 2010 2011

You are welcome

Join 6 active committers.

We areback!

7 Releases~1640 Changes~ 4095 Mails

in 2012/2013

Seriously.Isn‘t logging just

BORING?

Well.. . how do you log on your mobile/cloud apps?

With new innovation, new logging challenges

come up.

Logging needs innovation too.Look at Apache Flume.

Remember: Logging is mission critical.

Don‘t go without.

We are hiring!

use it!ask questions!

spread the love!send patches!

general@logging.apache.org

Christian Grobmeier

@grobmeierhttp://www.grobmeier.de

Thank you!

Image CreditsWriting Girl (Erin Kohlenberg)

Vulcano (Martin Barland)Fire Brigade (State Library of South Australia)

Gear Necklace Designs (Eric Skiff)Gazelle (Flickr: fwooper)

Golden Gate Bridge (Flickr: TimeLapseBlog.com)Pens (Flickr: JD | Photography)

Wineglass (Flickr: Willia4)Headache (Flickr: Threephin)Pills (Dr. Michael Günther)

Wheelgear (Flickr: ralphbijker)Grapes (Flickr: RVWithTito)

Chainsaw (Flickr: Dave Hosford)Elephant (Flickr: Werner Vermaak)Haunted House (Flickr: barb_ar)SOS (Flickr: Daquella Manera)

Bathtime muscles (Flickr: mollypop)Yawning Animal (Flickr: robef)

Mobile (Flickr: twicepix)Clouds (Flickr: karindalziel)

Fight (Flickr: KellBailey)