CSC307 Lecture 10 - Speaker Deck

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Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.info o ffi ce: 14 -227 CSC 307 Introduction to Software Engineering Lecture 10. Logging Process

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Problem 9

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Problem 10

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Bad Idea System.out.println 11 Messages

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Logging • Recording events, a ctions, or mess a ges th a t occur during the execution of a progr a m. • Proper logging is essenti a l for m a int a ining a nd troubleshooting a pplic a tions e ff ectively throughout their lifecycle. 12

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Good Idea 13 message 01 message 02 message 03 message 04 message 05

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SLF4J Logback • St a nds for Simple Logging F a c a de for J a v a • It provides a uni f ied interf a ce for logging oper a tions, a llowing developers to write logging code without binding their a pplic a tion to a speci f ic logging implement a tion. • We need to t a lk a bout the F a c a de P a ttern 14

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Getting Started

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SLF4J Logback | Add the dependency 16 https://github.com/CSC3100/Tool-Logging

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SLF4J Logback | Logging 17 https://github.com/CSC3100/Tool-Logging

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SLF4J Logback | Logging 18 https://github.com/CSC3100/Tool-Logging

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Severity Level 19 TRACE DEBUG INFO WARN ERROR Severity

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We want this 20 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 20

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Maven File and Directories 21

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Resources Folder • The resources folder in a M a ven project stores non-source-code f iles th a t your a pplic a tion needs, such a s con f igur a tion f iles, property f iles, im a ges, a nd other resources. • These f iles a re included in the f in a l build output a nd a v a il a ble on the cl a ssp a th a t runtime. 22

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src/main/resources/logback.xml • logb a ck.xml is a con f igur a tion f ile for SLF4J Logb a ck. • It de f ines how logging should be h a ndled, including log levels, a ppenders (where logs a re written), a nd log form a ts. • When your a pplic a tion st a rts, SLF4J Logb a ck a utom a tic a lly looks for this con f igur a tion f ile. 23

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ConsoleAppender 24 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 24 Appender

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src/main/resources/logback.xml 25 https://github.com/CSC3100/Tool-Logging

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SLF4J Logback | Logging 26

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ConsoleAppender 27 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 27 Appender

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Encoder

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Logstash Logback Encoder | POM.xml • Let’s use a nother libr a ry to t a ke a dv a nt a ge of extr a encoders • form a t Spring Boot logs in JSON form a t 29 https://github.com/CSC3100/Tool-Logging

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src/main/resources/logback.xml 30 https://github.com/CSC3100/Tool-Logging

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SLF4J Logback | Logging 31

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FileAppender

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Next 33 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender

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src/main/resources/logback.xml 34 https://github.com/CSC3100/Tool-Logging

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SLF4J Logback | Logging 35

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Cloud-Based Log Management

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Next 37 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender

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Cloud-Base Log Management • Cloud-b a sed log m a n a gement refers to the pr a ctice of collecting, storing, a n a lyzing, a nd m a n a ging log d a t a using cloud services. • This a ppro a ch lever a ges cloud computing to h a ndle the v a st a mounts of log d a t a 38

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betterstack.com/logs 39

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We need keys 40 String key = "XYZabc123259#$%#$Fcaskjhdux_2342445Calp";

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betterstack.com/logs 41

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betterstack.com/logs 42 WE6x9ya1dfMwRTouP9DEBmg

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HttpAppender Our very own creation Just for fun

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SLF4J Logback | Add the dependency 44 Just for JSON Support https://github.com/CSC3100/Tool-Logging

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src/main/resources/logback.xml 45 WE6x9ya1dfMwRTouP9DEB https://github.com/CSC3100/Tool-Logging

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javiergs.HttpAppender (Part 1/4) 46 https://github.com/CSC3100/Tool-Logging

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javiergs.HttpAppender (Part 2/4) 47 https://github.com/CSC3100/Tool-Logging

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javiergs.HttpAppender (Part 3/4) 48 https://github.com/CSC3100/Tool-Logging

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javiergs.HttpAppender (Part 4/4) 49 https://github.com/CSC3100/Tool-Logging

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logs.betterstack.com 50

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Full Solution 51 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender Appender

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Questions 52

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CSC 307 Introduction to Software Engineering Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Summer 2024 Copyright. These slides can only be used as study material for the class CSC307 at Cal Poly. They cannot be distributed or used for another purpose.