CSC509 Lecture 06

Software Design
Software Architecture III
(202510)

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 06. Software Architecture III
2. Observer 2
3. Important 3 Depreciated java.util.Observer java.util.Observable The implementation of these packages That is NOT about the Observer pattern being depreciated.
4. Important 4 Use java.beans.PropertyChangeListener java.beans.PropertyChangeSupport
5. https://github.com/CSC3100/Patterns
6. https://github.com/CSC3100/Patterns
7. https://github.com/CSC3100/Patterns
8. Thoughts? 8
9. Model-View-Controller
10. Model-View-Controller 10
15. Blackboard
16. Blackboard 16
17. Drafting an Implementation 17
22. Lab
23. Problem 23
24. Client-Server Sockets
25. Client-Server 25
26. Implementation :: Server 26 chrestomathy: https://www.javatpoint.com/socket-programming
27. Implementation :: Client 27 chrestomathy: https://www.javatpoint.com/socket-programming
28. Publisher-Subscriber MQTT
29. Message Queuing 29
30. Eclipse Paho for Java Wh a t is Eclipse P a ho? • A set of MQTT client libr a ries developed by the Eclipse Found a tion. • It supports multiple l a ngu a ges, such a s J a v a , Python, J a v a Script, etc. J a v a Dependency (M a ven) <dependency> <groupId>org.eclipse.paho</groupId> <artifactId>org.eclipse.paho.client.mqttv3</artifactId> <version>1.2.5</version> </dependency> 30
31. https://github.com/CSC3100/MQTT
32. Quality-of-service options • 0 – "at most once": A.K.A. "fire-and-forget." This option is suitable when message loss is acceptable, as it doesn't require acknowledgment or persistence. • 1 – "at least once": This option should be chosen when message loss is unacceptable, and your subscribers can handle duplicate messages. • 2 – "Exactly once": This option is ideal when message loss is unacceptable, and your subscribers cannot handle duplicate messages. 32
33. https://github.com/CSC3100/MQTT
34. Pong 34 https://github.com/CSC3100/Pong-Game
35. Questions 35
36. CSC 509 Software Engineering Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Fall 2025 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.