The document discusses the importance of logging in software development, highlighting various logging frameworks, particularly log4j 2.0, and its enhancements over prior versions. It emphasizes the need for innovation in logging practices, especially in mobile and cloud applications, while encouraging community contributions to the logging ecosystem. The speaker, Christian Grobmeier, also calls for engagement from the audience to ask questions and participate in the logging community.

1. WORLD OF LOGGING

2. Christian Grobmeier
@grobmeier
http://www.grobmeier.de

3. Why should you log?

4. T H E
BIGGEST
CHALLENGES
WE H AV E
a

5. SPEED!

6. Failsafe. Reliable.

7. Compability.

8. Taste.

9. Logging
with Duke
Java

10. Too much
taste...
m a k e s
headache!
Think on:
log4j, logback, JUL,
TinyLog, AVSL

11. Pills:
slf4j & Commons Logging

12. Which pill?
slf4j
log4j 1 logback JUL AVSL
log4j 2
Commons Logging
Don‘t forget PAX!

13. log4j 2.0
is the
future
of log4j
Integrates well with:
slf4j
log4j 1.x
Commons Logging

14. What makes
log4j 2.0
better?

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

16. API++
Instead:
if(logger.isDebugEnabled())
logger.info("Hi, " + u.getA() + “ “ + u.getB());
Write:
logger.info("Hi, {} {} ", u.getA(), u.getB());

17. Better Filter
Marker:
Marker SQL_MARKER =
MarkerManager.getMarker("SQL");
logger.debug(
SQL_MARKER,
"SELECT * FROM {}", table);

18. Plugins
@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) { … }

19. Plugins
@PluginFactory
public static Mine create(
@PluginAttr("name") String n,
@PluginElement("filters") Filter f) {
return new Mine(n, f);
}

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

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

22. Configuration
Reloading
<configuration monitorInterval="30">
...
</configuration>

23. log4j 1.x 2314
logback 2116
log4j 2.x 2386
Disabled 5
SPEED!
Logging Performance in ns

24. There is
more
sweetness

25. CHAINSAW

27. The story of
log4php
2004 2007 2009 2010

28. What‘s with...
log4net
log4cxx

29. The story of
log4php
Community

30. Good times,
bad times
2000 2009 2010 2011

31. We need your
HELP
Currently only
4 regular code
contributors.

32. But we
FIGHT!
6 Releases
~750 Commits
~600 dev Mails
in 2012 only!

33. Seriously.
Isn‘t logging just
BORING?

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

35. With new innovation,
new logging challenges
come up.
Logging needs
innovation too.
Look at Apache Flume.

36. Upcoming at the Incubator
Guice Components

37. Instead:
Logger logger = Logger.getLogger( „test“);

38. Instead:
Logger logger = Logger.getLogger( „test“);
Write:
@InjectLogger
Logger logger;

39. Remember: Logging is
mission critical.
Don‘t go without.

40. We are hiring!
use it!
ask questions!
spread the love!
send patches!
general@logging.apache.org

41. Thank you!
Christian Grobmeier
@grobmeier
http://www.grobmeier.de
Follow me, if you dare!

42. Image Credits
Earth (Nasa)
Vulcano (Flickr: Martin Barland)
Tiger (Flickr: TeryKats)
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)