CSC509 Lecture 08

Software Design
Software Product Lines
(202410)

Transcript

1. Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.info o ffi ce: 14 -227 CSC 508/9 Software Engineering (Design & Deployment) Lecture 08. Software Product Line
2. De f inition • A softw a re product line (SPL) is a collection of softw a re systems th a t sh a re common fe a tures a nd a re developed from a single set of core a ssets: • Go a l. The go a l of a n SPL is to cre a te multiple products with less development e ff ort by reusing the development e ff ort put into gener a l components a nd services. 2
3. JetBrains 3
4. Review
5. Code 5 https://github.com/ javiergs/CSC5090
6. Code 6
7. Feedback • Do not cre a te objects from a Bl a ckbo a rd. It is a Singleton for a re a son • Use inherit a nce for PropertyCh a ngeSupport • Do not m a ke a cl a ss observer of itself - it is wired! • Be more selective with your glob a l v a ri a bles ( a tributes). Remember the de f inition of a ttribute • Ask: Wh a t this cl a ss does? C a n you a nswer in a simple st a tement. • Cle a n your code - do not commit (submit) unused methods or commented code or sever a l empty lines. It provides a b a d impression. 7
8. Clean Code Re a d a bility • DRY • KIS • SRP • Comments • Error H a ndling with a Logger 8 Metrics • LOC (eLOC, lLOC) • CC • A • Inst a bility • D
9. Design P a tterns Clean Design 9
10. Tools Maven
11. • The project object model (POM) f ile describes a project a nd its dependencies. • A st a nd a rdized directory form a t. • Repositories where third-p a rty softw a re is stored a nd discovered. 11
12. Maven File and Directories 12
13. Create a project with Maven support 13
14. POM.xml 14
15. Maven Repository 15
16. Adding a New Dependency 16
17. Right-Click POM.xml 17
18. Tools Logger
19. Problem 19
20. Problem 20
21. Bad Idea System.out.println 21 Messages
22. 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. 22
23. Good Idea 23 message 01 message 02 message 03 message 04 message 05
24. 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. 24
25. SLF4J Logback | Add the dependency 25 https://github.com/CSC3100/Tool-Logging
26. SLF4J Logback | Logging 26 https://github.com/CSC3100/Tool-Logging
27. SLF4J Logback | Logging 27 https://github.com/CSC3100/Tool-Logging
28. Severity Level 28 TRACE DEBUG INFO WARN ERROR Severity
29. We want this 29 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 29
30. Maven File and Directories 30
31. 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. 31
32. 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. 32
33. src/main/resources/logback.xml 33 https://github.com/CSC3100/Tool-Logging
34. SLF4J Logback | Logging 34
35. ConsoleAppender 35 message 01 message 02 message 03 message 04 message 05 trace() debug() info () warn () error() Logger 35 Appender
36. Encoder
37. 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 37 https://github.com/CSC3100/Tool-Logging
38. src/main/resources/logback.xml 38 https://github.com/CSC3100/Tool-Logging
39. SLF4J Logback | Logging 39
40. FileAppender
41. Next 41 trace() debug() info () warn () error() message 01 message 02 message 03 message 04 message 05 Logger Appender Appender
42. src/main/resources/logback.xml 42 https://github.com/CSC3100/Tool-Logging
43. SLF4J Logback | Logging 43
44. Next
45. Questions 46
46. CSC 509 Software Engineering Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Fall 2024 Copyright. These slides can only be used as study material for the class CSC509 at Cal Poly. They cannot be distributed or used for another purpose.