CSC305 Summer Lecture 13

Individual Software Design and Development
Logging
(202508)

Transcript

1. Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.info o ffi ce: 14 -227 CSC 305 Individual Software Design and Development Lecture 13. Logging
2. Project | Icons 2 M a in02.j a v a M a in03.j a v a M a in04.j a v a M a in05.j a v a README.md Src LICENSE M a in01.j a v a src M a in01.j a v a
3. Project | Example 1 | Tab 2 3 M a in01.j a v a M a in02.j a v a M a in03.j a v a M a in04.j a v a M a in05.j a v a
4. Logging
5. Problem 5
6. Problem 6
7. Bad Idea System.out.println 7 Messages
8. 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. 8
9. Good Idea 9 message 01 message 02 message 03 message 04 message 05
10. 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 10
11. Getting Started
12. SLF4J Logback | Add the dependency 12 https://github.com/CSC3100/Tool-Logging
13. SLF4J Logback | Logging 13 https://github.com/CSC3100/Tool-Logging
14. SLF4J Logback | Logging 14 https://github.com/CSC3100/Tool-Logging
15. Severity Level 15 TRACE DEBUG INFO WARN ERROR Severity
16. We want this 16 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 16
17. Maven File and Directories 17
18. 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. 18
19. 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. 19
20. ConsoleAppender 20 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 20 Appender
21. src/main/resources/logback.xml 21 https://github.com/CSC3100/Tool-Logging
22. SLF4J Logback | Logging 22
23. ConsoleAppender 23 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 23 Appender
24. Encoder
25. 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 25 https://github.com/CSC3100/Tool-Logging
26. src/main/resources/logback.xml 26 https://github.com/CSC3100/Tool-Logging
27. SLF4J Logback | Logging 27
28. FileAppender
29. Next 29 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender
30. src/main/resources/logback.xml 30 https://github.com/CSC3100/Tool-Logging
31. SLF4J Logback | Logging 31
32. Panel
33. logback.xml 33
34. • Body Level One • Body Level Two • Body Level Three • Body Level Four • Body Level Five
35. • Body Level One • Body Level Two • Body Level Three • Body Level Four • Body Level Five
36. • Body Level One • Body Level Two • Body Level Three • Body Level Four • Body Level Five
37. Cloud-Based Log Management
38. Next 38 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender
39. 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 39
40. betterstack.com/logs 40
41. We need keys 41 String key = "XYZabc123259#$%#$Fcaskjhdux_2342445Calp";
42. betterstack.com/logs 42
43. betterstack.com/logs 43 WE6x9ya1dfMwRTouP9DEBmg
44. HttpAppender Our very own creation Just for fun
45. SLF4J Logback | Add the dependency 45 Just for JSON Support https://github.com/CSC3100/Tool-Logging
46. src/main/resources/logback.xml 46 WE6x9ya1dfMwRTouP9DEB https://github.com/CSC3100/Tool-Logging
47. javiergs.HttpAppender (Part 1/4) 47 https://github.com/CSC3100/Tool-Logging
48. javiergs.HttpAppender (Part 2/4) 48 https://github.com/CSC3100/Tool-Logging
49. javiergs.HttpAppender (Part 3/4) 49 https://github.com/CSC3100/Tool-Logging
50. javiergs.HttpAppender (Part 4/4) 50 https://github.com/CSC3100/Tool-Logging
51. logs.betterstack.com 51
52. Full Solution 52 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender Appender
53. Questions 53
54. Lab
55. Let’s Work 55
56. CSC 305 Individual Software Design and Development Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Summer 2025 Copyright. These slides can only be used as study material for the class CSC305 at Cal Poly. They cannot be distributed or used for another purpose.