1. SLF4J + Logback Albert junyuo@gmail.com

2. Simple Logging Facade for Java (SLF4J) Logback Pre-requistes Configuration example Reference 2 Agenda

3. The Simple Logging Facade for Java or (SLF4J) serves as a simple facade or abstraction for various logging frameworks, e.g. java.util.logging, log4j and logback, allowing the end user to plug in the desired logging framework at deployment time. http://www.slf4j.org/ Simple Logging Facade for Java (SLF4J) 3

4. 4

5. Projects depending on SLF4J 5

6. No revolution, only evolution. log4j is no longer being actively developed The same basic plumbing only done better. Faster, smaller, higher gas mileage, and generally more bang for the buck. 6 LOGBack

7. Logback offers a native implementation of the SLF4J API => Logback exposes its logging API through SLF4J. If you are using logback, you are actually using SLF4J SLF4J can delegate to log4j, logback, java.util.logging or JCL SLF4J can bridge log4j, JCL and j.u.l. 7 logback-classic implements SLF4J

8. logback.xml slf4j-api.jar logback-classic.jar logback-core.jar 8 Pre-requistes

9. 9 Configuration example

10. 10 Configuration example – cont. ConsoleAppender RollingFileAppender rollover daily or whenever the file size reaches 100MB

11. 11 Configuration example – cont.

12. 12 Configuration example – cont. ConsoleAppender RollingFileAppender

13. SLF4J http://www.slf4j.org/ Logback http://logback.qos.ch/ Chapter 4: Appenders http://logback.qos.ch/manual/appenders.html 13 Reference