Scala dsls-dissecting-and-implementing-rogue
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Just a few simple slides for a presentation at Kraków's Scala User Group. The rest of the session is live coding where we reimplement a tiny subset of Rogue, Foursquares MongoDB DSL.
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Scala dsls-dissecting-and-implementing-rogue
- 1. Scala DSLs Dissecting Rogue Konrad Malawski / @ktosopl GDG / PJUG / KSUG / SCKRK ScalaCamp 23.01.2012 Wednesday, December 26, 12
- 2. Wednesday, December 26, 12
- 3. Querying Mongo Wednesday, December 26, 12
- 4. Querying Mongo Wednesday, December 26, 12
- 5. Querying Mongo Wednesday, December 26, 12
- 6. Querying Mongo QL = Plain JSON Wednesday, December 26, 12
- 7. Querying Mongo QL = Plain JSON JavaScript Console Wednesday, December 26, 12
- 8. Querying Mongo QL = Plain JSON JavaScript Console Java Driver Wednesday, December 26, 12
- 9. Querying Mongo QL = Plain JSON JavaScript Console Java Driver Casbah = Scala Driver Wednesday, December 26, 12
- 10. Querying Mongo QL = Plain JSON JavaScript Console Java Driver Casbah = Scala Driver ... used by Rogue Wednesday, December 26, 12
- 11. Querying Mongo: JS Console API Wednesday, December 26, 12
- 12. Querying Mongo: JS db.inventory.find( {} ) Wednesday, December 26, 12
- 13. Querying Mongo: JS db.inventory.find( {} ) “find all” Wednesday, December 26, 12
- 14. Querying Mongo: JS db.inventory.find( { qty: { $gt: 20 } } ) Wednesday, December 26, 12
- 15. Querying Mongo: JS db.inventory.find( { qty: { $gt: 20 } } ) gt means >= Wednesday, December 26, 12
- 16. Querying Mongo: JS db.pople.find( { age: { $gte: 20 }, $or: [ { name: “Ken” }, { name: “Kenshiro” }, { city: “Tokyo” }, ... ] } ) Wednesday, December 26, 12
- 17. Querying Mongo: JS db.pople.find( { age: { $gte: 20 }, $or: [ { name: “Ken” }, $or may contain any clause { name: “Kenshiro” }, { city: “Tokyo” }, ... ] } ) Wednesday, December 26, 12
- 18. Querying Mongo: Java Java API (Morhpia) Wednesday, December 26, 12
- 19. Querying Mongo: Java ds.find(Employee.class).field("manager").equal(null).get(); Wednesday, December 26, 12
- 20. Querying Mongo: Java ds.find(Employee.class).field("manager").equal(null).get(); You call this typesafe!? Wednesday, December 26, 12
- 21. Mongo with Rogue Wednesday, December 26, 12
- 22. Rogue in Action import com.foursquare.rogue.Rogue._ Wednesday, December 26, 12
- 23. Rogue in Action Person where(_.age gte 18) limit(100) fetch() Wednesday, December 26, 12
- 24. Rogue in Action Code Completion Code Completion Person where(_.age gte 18) limit(100) fetch() Code Completion Code Completion Wednesday, December 26, 12
- 25. Rogue in Action Person where(_.age gte “Bazinga”) limit(100) fetch() Wednesday, December 26, 12
- 26. Rogue in Action Person where(_.age gte “Bazinga”) limit(100) fetch() Won’t compile - age is IntField Wednesday, December 26, 12
- 27. Rogue in Action Person where(_.age gte 18) limit(100) fetch() Wednesday, December 26, 12
- 28. Rogue in Action Person where(_.age gte 18) limit(100) fetch() Limit Wednesday, December 26, 12
- 29. Rogue in Action Person where(_.age gte 18) limit(100) foreach { p => println(”Name: ” + p.firstName) } Wednesday, December 26, 12
- 30. Rogue in Action gte means >= Person where(_.age gte 18) limit(100) foreach { p => println(”Name: ” + p.firstName) } Wednesday, December 26, 12
- 31. Rogue in Action Person or( _.where(_.name eqs "Ken"), _.where(_.name eqs "ken") _.whereOpt(Option("Kenshiro")(_.name eqs _)) ) get() Wednesday, December 26, 12
- 32. Rogue in Action eqs means Equals Person or( _.where(_.name eqs "Ken"), _.where(_.name eqs "ken") _.whereOpt(Option("Kenshiro")(_.name eqs _)) ) get() Wednesday, December 26, 12
- 33. Rogue in Action eqs means Equals Person or( _.where(_.name eqs "Ken"), _.where(_.name eqs "ken") _.whereOpt(Option("Kenshiro")(_.name eqs _)) ) get() Get me one Person. Wednesday, December 26, 12
- 34. Rogue in Action eqs means Equals Person or( _.where(_.name eqs "Ken"), _.where(_.name eqs "ken") _.whereOpt(Option("Kenshiro")(_.name eqs _)) ) get() Issue #69: fix in my pull req Get me one Person. Wednesday, December 26, 12
- 35. Live Hacking Wednesday, December 26, 12
- 36. Live Hacking Wednesday, December 26, 12
- 37. Live Hacking Wednesday, December 26, 12
- 38. Live Hacking Advanced Stuff. Wednesday, December 26, 12
- 39. Live Hacking Advanced Stuff. Fast. Wednesday, December 26, 12
- 40. Live Hacking Advanced Stuff. Fast. Ask Questions! Wednesday, December 26, 12
- 41. Wednesday, December 26, 12
- 42. def links = • Scala Lang http://www.scala-lang.org/ • Scala Koans http://www.scalakoans.org • Blog.Project13.pl - http://www.blog.project13.pl •MongoDB ref - docs.mongodb.org/manual/reference/operators/ • Foursquare Rogue - https://github.com/foursquare/rogue • Java Morphia - http://code.google.com/p/morphia/ • Kraków Scala UG - http://krakowscala.pl / http://scalacamp.pl Wednesday, December 26, 12
- 43. def links = • Scala Lang http://www.scala-lang.org/ • Scala Koans http://www.scalakoans.org • Blog.Project13.pl - http://www.blog.project13.pl •MongoDB ref - docs.mongodb.org/manual/reference/operators/ • Foursquare Rogue - https://github.com/foursquare/rogue • Java Morphia - http://code.google.com/p/morphia/ • Kraków Scala UG - http://krakowscala.pl / http://scalacamp.pl Mailing lists rock! Wednesday, December 26, 12
- 44. Thanks! Dziękuję! ありがとう！ Konrad Malawski / @ktosopl GDG / PJUG / KSUG / SCKRK ScalaCamp 23.01.2012 Wednesday, December 26, 12
- 45. Thanks! Dziękuję! ありがとう！ I love feedback! <3 Konrad Malawski / @ktosopl GDG / PJUG / KSUG / SCKRK ScalaCamp 23.01.2012 Wednesday, December 26, 12