CSC305 Lecture 15

Individual Software Design and Development
Loggers
(202511)

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 15. Logger
2. Assignment 03
3. 3 Assignment 03 is due on Friday November 14
4. Assignment 03 4
5. Assignment 03 | Example 1 | Tab 1 5 Bo a rdP a nel M a in Controller M a in01.j a v a Take the population values and divide them into three groups by first finding the largest and smallest values, then calculating the range between them, and finally using that range to set two cut- off points.
6. Assignment 03 | Example 1 | Tab 2 6 Painful Useless Controller Main BoardPanel * java files colors to be calculated; * not showing them here Add inheritance and local variables, but only for the other classes in this folder
7. Assignment 03 | Example 1 | Tab 3 7 👷 This space is empty for now
8. Logging
9. Problem 9
10. Bad Idea System.out.println 10 Messages
11. Good Idea 11 message 01 message 02 message 03 message 04 message 05
12. 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 12
13. SLF4J Logback | Add the dependency 13 https://github.com/CSC3100/Tool-Logging
14. SLF4J Logback | Logging 14 https://github.com/CSC3100/Tool-Logging
15. We want this 15 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 15
16. Next
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. FileAppender
25. Next 25 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender
26. src/main/resources/logback.xml 26 https://github.com/CSC3100/Tool-Logging
27. SLF4J Logback | Logging 27
28. Cloud-Based Log Management
29. Next 29 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender
30. 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 30
31. betterstack.com/logs 31
32. We need keys 32 String key = "XYZabc123259#$%#$Fcaskjhdux_2342445Calp";
33. betterstack.com/logs 33
34. betterstack.com/logs 34 WE6x9ya1dfMwRTouP9DEBmg
35. HttpAppender Our very own creation Just for fun
36. SLF4J Logback | Add the dependency 36 Just for JSON Support https://github.com/CSC3100/Tool-Logging
37. src/main/resources/logback.xml 37 WE6x9ya1dfMwRTouP9DEB https://github.com/CSC3100/Tool-Logging
38. javiergs.HttpAppender (Part 1/4) 38 https://github.com/CSC3100/Tool-Logging
39. javiergs.HttpAppender (Part 2/4) 39 https://github.com/CSC3100/Tool-Logging
40. javiergs.HttpAppender (Part 3/4) 40 https://github.com/CSC3100/Tool-Logging
41. javiergs.HttpAppender (Part 4/4) 41 https://github.com/CSC3100/Tool-Logging
42. logs.betterstack.com 42
43. Full Solution 43 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender Appender
44. Encoder
45. 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 45 https://github.com/CSC3100/Tool-Logging
46. src/main/resources/logback.xml 46 https://github.com/CSC3100/Tool-Logging
47. SLF4J Logback | Logging 47
48. Questions 48
49. Lab
51. CSC 305 Individual Software Design and Development Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Fall 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.