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How to Design an API
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Simon Wood
July 02, 2014
Technology
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How to Design an API
Talk at London API Meetup on 2nd July 2014.
Simon Wood
July 02, 2014
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Transcript
How to Design a Unified API London API Group -
02/07/14 Wednesday, 2 July 14
Simon Wood @hpoom Holiday Extras Image by Barney Livingston -
Flickr Wednesday, 2 July 14
@hpoom Wednesday, 2 July 14
@hpoom Over 40m visits and 500k bookings in the last
5 years Give £20m revenue to hotels each year Wednesday, 2 July 14
@hpoom Wednesday, 2 July 14
What I am going to cover The Problem Design Solutions
Considerations Technology @hpoom Wednesday, 2 July 14
LET’S TALK ABOUT THE PROBLEM @hpoom Wednesday, 2 July 14
Multiple sources of data @hpoom Wednesday, 2 July 14
@hpoom Wednesday, 2 July 14
Multiple consumers of data @hpoom Wednesday, 2 July 14
Shortbreaks traffic breakdown 18 months @hpoom Wednesday, 2 July 14
@hpoom Wednesday, 2 July 14
De couple @hpoom Wednesday, 2 July 14
Hide legacy @hpoom Wednesday, 2 July 14
Speed! @hpoom Wednesday, 2 July 14
Source: Strangeloop Networks Case Study Amazon 100 milliseconds revenue 1%
Mozilla 2.2 seconds downloads 60m per year @hpoom Wednesday, 2 July 14
Scaleability @hpoom Wednesday, 2 July 14
Be efficient with resource @hpoom Wednesday, 2 July 14
SO WHAT IS THE THE SOLUTION @hpoom Wednesday, 2 July
14
The Design Bit @hpoom Wednesday, 2 July 14
Website Application Layer Legacy Reservation System @hpoom Wednesday, 2 July
14
Website Application Layer & API Legacy Reservation System Affiliates @hpoom
Wednesday, 2 July 14
Website Application Layer & API Legacy Reservation System Affiliates Hotel
System Ticket System @hpoom Wednesday, 2 July 14
Website Application Layer & API Legacy Reservation System Affiliates Hotel
System Ticket System @hpoom Wednesday, 2 July 14
Unified API Website Mobile App Affiliates Smart TV Hotels Tickets
Transport Food Multiple consumers of data Multiple sources of data @hpoom Wednesday, 2 July 14
Proxy @hpoom Wednesday, 2 July 14
Website Application Layer Legacy Reservation System @hpoom Wednesday, 2 July
14
Website Application Layer Unified API Legacy Reservation System New System
Proxy @hpoom Wednesday, 2 July 14
Hierarchical @hpoom Wednesday, 2 July 14
Website Application Layer Unified API Legacy Reservation System New System
@hpoom Wednesday, 2 July 14
Website Application Layer Unified API Product API Content API Price
& Availability Name Star Rating Facilities @hpoom Wednesday, 2 July 14
Website Application Layer Unified API Product API Content API Hotels
Tickets Transport @hpoom Wednesday, 2 July 14
Website Application Layer Unified API Product API Content API Hotels
Tickets Transport Legacy New Affiliate @hpoom Wednesday, 2 July 14
Micro-service architecture Idea by Fred George - http://bit.ly/fred-george @hpoom Wednesday,
2 July 14
Traditional Enterprise Architecture Micro Service Architecture Diagram by James Hughes
- http://bit.ly/micro-service @hpoom Wednesday, 2 July 14
Website Application Layer Unified API Content API @hpoom Wednesday, 2
July 14
Authentication @hpoom Wednesday, 2 July 14
Unified API Website Mobile App Affiliates Smart TV Hotels Tickets
Transport Food Auth @hpoom Wednesday, 2 July 14
Standardise your payloads @hpoom Wednesday, 2 July 14
PUBLIC SERVICE ANNOUNCEMENT @hpoom This is THE correct way to
write numeric dates 2014-07-02 Source XKCD - http://bit.ly/iso-date Wednesday, 2 July 14
Checksum tricks @hpoom MD5 ("Checksum tricks") = 1aef67e94cf84d9c4200e24cbdc9f93d Wednesday, 2
July 14
Cache & async requests @hpoom Wednesday, 2 July 14
Unified API Website Mobile App Affiliates Smart TV Hotels Tickets
Transport Food Async Total request time is only as slow as the slowest provider 1.2s 0.8s 1.1s 0.6s @hpoom Wednesday, 2 July 14
Unified API Website Mobile App Affiliates Smart TV Hotels Tickets
Transport Food Cache Cache Cache Cache Cache If we hit the top cache respond in 0.04s @hpoom Wednesday, 2 July 14
In summary Solutions Unified API Standard Payloads Micro Services Proxy
Cache & Async Hierarchical Problems Multi Data Sources Multi Consumers Decouple Hide Legacy Speed Scaleability @hpoom Wednesday, 2 July 14
SOME CONSIDERATIONS @hpoom Wednesday, 2 July 14
Open & Commercial @hpoom Wednesday, 2 July 14
The right way to rate limit @hpoom Wednesday, 2 July
14
Who needs access? @hpoom Wednesday, 2 July 14
Unlimited pools of talent @hpoom Chris Jason, ESPN - http://bit.ly/espnapi
Wednesday, 2 July 14
Debugging & Logs @hpoom Wednesday, 2 July 14
Our log data in loggly @hpoom Wednesday, 2 July 14
700k unique payloads 3GB JSON logged daily @hpoom Wednesday, 2
July 14
WHAT TECHNOLOGY? @hpoom Wednesday, 2 July 14
We use... @hpoom express web application framework for node Wednesday,
2 July 14
Yesterday’s Standard SOAP XML Today’s Standard REST JSON Keep it
simple! @hpoom Wednesday, 2 July 14
@hpoom Wednesday, 2 July 14
Language does not matter @hpoom Wednesday, 2 July 14
Good docs @hpoom Pusher Blog - http://bit.ly/devapidocs Wednesday, 2 July
14
TAKE AWAYS @hpoom Wednesday, 2 July 14
APIs Mobile Social Cloud @hpoom Diagram by Sam Ramji -
http://bit.ly/biz-apis Wednesday, 2 July 14
Consume your own APIs @hpoom uses to build Source Zach
Holman - http://bit.ly/githubdogfood uses to build Wednesday, 2 July 14
@hpoom “You wouldn't really think that an online bookstore needs
to be an extensible, programmable platform. Would you?” Steve Yegge Source Steve Yegge - http://bit.ly/yegge Wednesday, 2 July 14
is really important don't screw it up APIs Design @hpoom
Wednesday, 2 July 14
Thanks http://bit.ly/unifiedapi @hpoom twitter + github Simon Wood Wednesday, 2
July 14