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OSCON 2012: ql.io and Node.js

OSCON 2012 (July - Portland, OR) presentation by Subbu Allamaraju and myself on ql.io and Node.js

jcleblanc
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OSCON 2012: ql.io and Node.js

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  1. node.js and ql.io Build Your Own HTTP APIs for Agility and Scale OSCON July 20, 2012 1

  2. Subbu Allamaraju @sallamar github.com/ s3u 2

  3. Jon LeBlanc @jcleblanc github.com/jcle blanc 3

  4. How to consume HTTP APIs cheaply and efficiently 4

  5. curl -X <HTTP method> <URI> 5

  6. Real code (randomized)

  7. 7

  8. 8

  9. 9

  10. 10

  11. 11

  12. 12

  13. 13

  14. 14

  15. Use case: Find things from A For each thing, find details from B For each thing, find more details from C Merge results 15

  16. Use case: Find products Find dominant categories of products Look up category info Merge categories with products 16

  17. Use case: Get stuff from A If A is down, try from B Annotate stuff with other stuff from C Ignore some things from the stuff Join all 17

  18. Client [Really important client] Why don't you give me an API optimized for my use cases? Producers Server [Really important producer] Thanks. Get a number and stand in the line! 18

  19. Client [Really important client] Why don't you give me an API optimized for my use cases? Producers Server Who gets to decide the right thing? [Really important producer] Thanks. Get a number and stand in the line! 19

  20. Build Your Own Optimized APIs 20

  21. https://github.com/ql -io/ql.io Platform Engineering 21

  22. A domain specific language for HTTP client programming 22

  23. cut down lines of code reduce no of requests save bandwidth 23

  24. 24

  25. http://ql.io/console 25

  26. ql.io Installation Modes Web Server Node.js 26

  27. curl http://<host>/q?s=query 27

  28. As a Standalone Server Data (internal ) ql.io Node Host Data (externa l)

  29. # As a node.js module npm install ql.io-engine

  30. // Use ql.io from node.js var Engine = require('ql.io-engine'); var engine = new Engine({ //OPTIONS }); var script = '…'; engine.execute(script, function(emitter){ emitter.on("end", function(err, res){ … }); });

  31. Language: Defining a Data Source Include in Request Include in .ql file

  32. Example: Mustache Templates

  33. Example: jQuery for Cross Domain Reqs

  34. Let’s Do It!

  35. 1. Interop via HTTP 2. SQL inspired 3. Implicit orchestration 4. Failure modes 5. Consumer 35

  36. code https://github.com/ql-io/ql.io docs/demos http://ql.io https://github.com/jcleblanc/ api-masher blog http://ql-io.github.com 36

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