The document discusses the differences between service-oriented architecture (SOA) and representational state transfer (REST) architectural styles. It explains that SOA solutions emphasize services, service flows, and service repositories, while REST solutions focus on servers and clients directly communicating. The document notes there is an "impedance mismatch" between SOA and REST, as they have differing needs and architectural styles. It aims to analyze where SOA and REST align and differ to understand how to better combine the two approaches.

1. William Martínez Pomares Explaining the SOA/REST Impedance Mismatch

2. Agenda 2011 William Martínez Pomares Avantica Technologies UCR 2

3. Concepts. Names. 2011 William Martínez Pomares Avantica Technologies UCR 3

4. Needs anD Architectural Styles 2011 William Martínez Pomares Avantica Technologies UCR 4

5. Application types 2011 William Martínez Pomares Avantica Technologies UCR 5

7. Tight connections

8. High speed communication

9. Strong coupling

10. Reuse of Parts Optional2011 William Martínez Pomares Avantica Technologies UCR 6

11. Networked application Application as a Composition of Nodes Weak coupling High cost communication User aware of composition Reuse of Parts is common 2011 William Martínez Pomares Avantica Technologies UCR 7

12. Integrated Application Application as an Integration of Whole Applications Standard Interfaces Low frequency of interaction Higher level processes Reuse of Parts is rule Large distribution 2011 William Martínez Pomares Avantica Technologies UCR 8

13. SOA solves… 2011 William Martínez Pomares Avantica Technologies UCR 9 *Nicolai M. Josuttis, SOA in Practice, OREILLY

14. Rest solves 2011 William Martínez Pomares Avantica Technologies UCR 10 *Roy Thomas Fielding, Architectural Styles and the Design of Network-based Software Architectures, 4

15. SOA SOLUTION 2011 William Martínez Pomares Avantica Technologies UCR 11 Service Flow Client Service Client Service Repository

16. REST SOLUTION 2011 William Martínez Pomares Avantica Technologies UCR 12 Server Client Server Client Server

17. Comparing… Mismatch! 2011 William Martínez Pomares Avantica Technologies UCR 13

18. REST – SOA Match up 2011 William Martínez Pomares Avantica Technologies UCR 14

19. SOA and REST Web Services 2011 William Martínez Pomares Avantica Technologies UCR 15

20. REST and Service as A Resource 2011 William Martínez Pomares Avantica Technologies UCR 16

21. Conclusion 2011 William Martínez Pomares Avantica Technologies UCR 17

22. 2011 William Martínez Pomares Avantica Technologies UCR 18 Questions?

23. 2011 William Martínez Pomares Avantica Technologies UCR 19 Contacts wmartinez@acoscomp iasahome.org Costa Rica Twitter @wmartinez http://wmp-archi.blogspot.com/