API-Driven Development for Both Ends

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Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/KqpQu2. Jakub Nesetril presents a practical example of prototyping, developing and testing an application using a structured description of its API. Filmed at qconsf.com. Jakub Nesetril is co-founder & CEO of Apiary, helping you make API design and documentation enjoyable. Prior to Apiary Jakub has gathered 10 years of experience leading API products and engineering teams in companies like GoodData and APN.

Tecnologia

API-Driven Development
for both ends
jakub@apiary.io

Watch the video with slide
synchronization on InfoQ.com!
http://www.infoq.com/presentations
/api-driven-development

InfoQ.com: News & Community Site
• 750,000 unique visitors/month
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Portuguese)
• Post content from our QCon conferences
• News 15-20 / week
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Presented at QCon San Francisco
www.qconsf.com
Purpose of QCon
- to empower software development by facilitating the spread of
knowledge and innovation
Strategy
- practitioner-driven conference designed for YOU: influencers of
change and innovation in your teams
- speakers and topics driving the evolution and innovation
- connecting and catalyzing the influencers and innovators
Highlights
- attended by more than 12,000 delegates since 2007
- held in 9 cities worldwide

Overview

• Why are APIs different?
• Why are APIs bad?
• How to fix that?
* APIs = REST/HTTP APIs

#noBackend?

API is the border checkpoint, the DMZ
between frontend and backend

Jakub Nesetril

• backend dev
• frontend dev
• founder of Apiary

Apiary
• API Design, Documentation & Testing Tools
• Grown from 0 to 35,000 APIs since last year
• Largest API community worldwide

API is UI to Data
Design

User Experience

API is UI to Data

Emotions

Design

User Experience

API is UI to Data

Emotions

Design

User Experience

Subjective

API is UI to Data

Emotions

Design

User Experience

Subjective

Culturally Dependent

API is UI to Data

Emotions

Simplicity

Design

User Experience

Subjective

Culturally Dependent

API is UI to Data

Emotions

Simplicity

Design
Productivity

User Experience

Subjective

Culturally Dependent

API is UI to Data

Emotions

Conversion Rates
Simplicity

Design
Productivity

User Experience

Subjective

Culturally Dependent

API is UI to Data

Emotions

Conversion Rates
Simplicity

Design
Productivity

User Experience

Usability Studies

Subjective

Culturally Dependent

API is UI to Data

Emotions

Conversion Rates
Simplicity

Design
Productivity

User Experience

Hackathons

Subjective

Culturally Dependent

Java

Backend
Rails
Scala
Erlang

Frontend

Validation
Uptime

Java

Maintenance

Backend
Caching Rails
Scala
Security

Versioning

Erlang

Frontend

Validation
Uptime

Java

Maintenance

Backend
Caching Rails
Scala
Security

jQuery

Frontend
ObjC

Versioning

Erlang

Hoodie

Latency

Validation
Uptime

Java

Maintenance

Backend
Caching Rails
Scala
Security

Versioning

Erlang

Can It Be Done?
TTFHW

jQuery

Frontend
Debugging
ObjC
Hoodie
Example
Support

3-6 weeks
Design

3-6 months
Implementation

Customer

Problem: API providers don't
understand API consumers
(and vice versa)

Frontend developer builds
#noBackend app

Backend developers get
implementation specs
(in form of tests)

API Blueprint

• human-readable & human-writable
• based on Markdown, you already know it
• structured reasoning about APIs

Concurrent Development
Frontend

Contract

Backend

Concurrent Development
Frontend

mocks
Contract

Backend

Concurrent Development
Frontend

mocks
Contract

tests
Backend

Source Code
Format: https://github.com/apiaryio/api-blueprint
Testing: https://github.com/apiaryio/dredd
JS SDK: https://github.com/apiaryio/apiblueprint-sdk

Thank You
@apiaryio
http://apiary.io/
!

@jakubnesetril

Watch the video with slide synchronization on
InfoQ.com!
http://www.infoq.com/presentations/apidriven-development

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API-Driven Development for Both Ends

1. API-Driven Development for both ends jakub@apiary.io

2. Watch the video with slide synchronization on InfoQ.com! http://www.infoq.com/presentations /api-driven-development InfoQ.com: News & Community Site • 750,000 unique visitors/month • Published in 4 languages (English, Chinese, Japanese and Brazilian Portuguese) • Post content from our QCon conferences • News 15-20 / week • Articles 3-4 / week • Presentations (videos) 12-15 / week • Interviews 2-3 / week • Books 1 / month

3. Presented at QCon San Francisco www.qconsf.com Purpose of QCon - to empower software development by facilitating the spread of knowledge and innovation Strategy - practitioner-driven conference designed for YOU: influencers of change and innovation in your teams - speakers and topics driving the evolution and innovation - connecting and catalyzing the influencers and innovators Highlights - attended by more than 12,000 delegates since 2007 - held in 9 cities worldwide

4. Overview • Why are APIs different? • Why are APIs bad? • How to fix that? * APIs = REST/HTTP APIs

5. #noBackend? API is the border checkpoint, the DMZ between frontend and backend

6. Jakub Nesetril • backend dev • frontend dev • founder of Apiary

7. Apiary • API Design, Documentation & Testing Tools • Grown from 0 to 35,000 APIs since last year • Largest API community worldwide

8. What is an API?

10.

11. API is UI to Data

12. API is UI to Data

13. API is UI to Data User Experience

14. API is UI to Data Design User Experience

15. API is UI to Data Emotions Design User Experience

16. API is UI to Data Emotions Design User Experience Subjective

17. API is UI to Data Emotions Design User Experience Subjective Culturally Dependent

18. API is UI to Data Emotions Simplicity Design User Experience Subjective Culturally Dependent

19. API is UI to Data Emotions Simplicity Design Productivity User Experience Subjective Culturally Dependent

20. API is UI to Data Emotions Conversion Rates Simplicity Design Productivity User Experience Subjective Culturally Dependent

21. API is UI to Data Emotions Conversion Rates Simplicity Design Productivity User Experience Usability Studies Subjective Culturally Dependent

22. API is UI to Data Emotions Conversion Rates Simplicity Design Productivity User Experience Hackathons Subjective Culturally Dependent

23. Great! Make good design!

24. No dev thinks HIS design sucks!

25.

26.

27. Provider Consumer

28. Backend Frontend

29. Java Backend Rails Scala Erlang Frontend

30. Validation Uptime Java Maintenance Backend Caching Rails Scala Security Versioning Erlang Frontend

31. Validation Uptime Java Maintenance Backend Caching Rails Scala Security jQuery Frontend ObjC Versioning Erlang Hoodie

32. Latency Validation Uptime Java Maintenance Backend Caching Rails Scala Security Versioning Erlang Can It Be Done? TTFHW jQuery Frontend Debugging ObjC Hoodie Example Support

33. So?

34. Traditional API Development

35.

36.

37.

38. Design Implementation Customer

39. Design Implementation Customer

40. 3-6 weeks Design 3-6 months Implementation Customer

41. Problem: API providers don't understand API consumers (and vice versa)

42. Want good APIs? ! Empower the Frontend

43. Let's turn that on it's head

44. Design Implementation Customer

45. Design Customer Implementation

46. Design Customer Implementation

47. Frontend developer designs an API

48. Frontend developer builds #noBackend app

49. Backend developers get implementation specs (in form of tests)

50. API Blueprint • human-readable & human-writable • based on Markdown, you already know it • structured reasoning about APIs

51.

52. demo

53. What did we just see?

54. Concurrent Development Frontend Contract Backend

55. Concurrent Development Frontend mocks Contract Backend

56. Concurrent Development Frontend mocks Contract tests Backend

57. What happens when you're offline?

58. demo

59. Summary

60. Involve the frontend

61. Collaborate

62. Source Code Format: https://github.com/apiaryio/api-blueprint Testing: https://github.com/apiaryio/dredd JS SDK: https://github.com/apiaryio/apiblueprint-sdk

63. Thank You @apiaryio http://apiary.io/ ! @jakubnesetril

64. Watch the video with slide synchronization on InfoQ.com! http://www.infoq.com/presentations/apidriven-development

API-Driven Development for Both Ends

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