Scala dsls-dissecting-and-implementing-rogue

Konrad Malawski / @ktosoplGDG / PJUG / KSUG / SCKRK

ScalaCamp 23.01.2012

Scala DSLsDissecting Rogue

Wednesday, December 26, 12

Querying Mongo

QL = Plain JSON

Querying Mongo

QL = Plain JSONJavaScript Console

Querying Mongo

Java Driver

Querying Mongo

Java DriverCasbah = Scala Driver

Querying Mongo

Java DriverCasbah = Scala Driver

... used by Rogue

Querying Mongo

Querying Mongo: JS

Console API

Querying Mongo: JS

db.inventory.find( {} )

Querying Mongo: JS

db.inventory.find( {} )

“find all”

Querying Mongo: JS

db.inventory.find( { qty: { $gt: 20 } } )

Querying Mongo: JS

db.inventory.find( { qty: { $gt: 20 } } )

gt means >=

Querying Mongo: JS

db.pople.find( { age: { $gte: 20 }, $or: [ { name: “Ken” }, { name: “Kenshiro” }, { city: “Tokyo” }, ... ] } )

Querying Mongo: JS

db.pople.find( { age: { $gte: 20 }, $or: [ { name: “Ken” }, { name: “Kenshiro” }, { city: “Tokyo” }, ... ] } )

$or may contain any clause

Querying Mongo: Java

Java API(Morhpia)

ds.find(Employee.class).field("manager").equal(null).get();

You call this typesafe!?

Mongo with Rogue

Rogue in Action

import com.foursquare.rogue.Rogue._

Rogue in Action

Person where(_.age gte 18) limit(100) fetch()

Rogue in Action

Code Completion

Rogue in Action

Person where(_.age gte “Bazinga”) limit(100) fetch()

Rogue in Action

Person where(_.age gte “Bazinga”) limit(100) fetch()

Won’t compile - age is IntField

Rogue in Action

Person where(_.age gte 18) limit(100) foreach { p => println(”Name: ” + p.firstName)}

Rogue in Action

Person where(_.age gte 18) limit(100) foreach { p => println(”Name: ” + p.firstName)}

gte means >=

Rogue in Action

Person or( _.where(_.name eqs "Ken"), _.where(_.name eqs "ken") _.whereOpt(Option("Kenshiro")(_.name eqs _))) get()

Rogue in Action

eqs means Equals

Rogue in Action

Get me one Person.

eqs means Equals

Rogue in Action

Get me one Person.

eqs means Equals

Issue #69: fix in my pull req

Live Hacking

Advanced Stuff.

Live Hacking

Advanced Stuff.Fast.

Live Hacking

Advanced Stuff.Fast.

Ask Questions!

Live Hacking

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

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!

Konrad Malawski / @ktosoplGDG / PJUG / KSUG / SCKRK

Thanks! Dziękuję!ありがとう！

I love feedback! <3 Konrad Malawski / @ktosoplGDG / PJUG / KSUG / SCKRK

Thanks! Dziękuję!ありがとう！

Scala dsls-dissecting-and-implementing-rogue

Technology

Transcript of Scala dsls-dissecting-and-implementing-rogue

DSLs for Front End Rails

Implementing and Composing MDSD-Typical DSLs · approaches of building DSLs and their advantages and disadvantages with respect to MDSD. We show that embedded DSLs can be used to

DSLs for Network Protocols

TDC 2015 - DSLs em Ruby

Internal DSLs: Scala

DSLs в Perl

DSLs for Java Developers

Dsls Ssq Setup Eng

DSLs with fold algebras

MicroMill DSLS Manual

All DSLS GROUP PRODUCTS 3

Building DSLs with Scala

All DSLS GROUP PRODUCTS 2

Code Visualization, UML, & DSLs

Combinators, DSLs, HTML and F#

Lecture 12 Implementing Small Languages internal vs. external DSLs, hybrid small DSLs

DSLs In Erlang

A Semantic Framework for DSLs

Building-Blocks for Performance Oriented DSLs · 2018-10-22 · DSLs while maintaining the modest effort required in creating purely-embedded internal (library-based) DSLs, a notion

Type-safe DSLs