ArangoDB @ RubyConf Argentina

About ArangoDB, Foxx & the tools to access ArangoDB with Ruby. Thanks for having me, RubyConf Argentina :)

Transcript

1. 1 Lucas Dohmen @moonbeamlabs ! the multi-purpose NoSQL Database ! www.arangodb.org
2. 2 Lucas Dohmen @moonbeamlabs ! the multi-purpose NoSQL Database ! www.arangodb.org
3. Lucas Dohmen ‣ From Cologne in Germany ‣ ArangoDB Core Team ‣ ArangoDB Foxx & Ruby Stuff ‣ Open Source Developer, Podcaster & CoderDojo Cologne Organizer 3 /\ (~( ) ) /\_/\ ( _-----_(@ @) ( \ / /|/--\|\ V " " " "
4. Also… ‣ I don’t speak Spanish :( ‣ Will start learning it with Duolingo now ‣ Thanks to the interpreters <3 4
5. Main Features 5 ‣ Open source and free ‣ Multi model database ‣ AQL ‣ Extendable through JS ‣ Replication & sharding ‣ High performance & space efficiency ‣ Powerful Admin Interface ‣ Ashikawa & Guacamole ‣ Started in Sep 2011 ‣ Current Version: 2.2
6. Free and Open Source ‣ Apache 2 License ‣ On Github ‣ Do what you want with it ‣ ... and don‘t pay a dime! 6
7. NoSQL is not “one thing” ‣ Almost all statements about ‘all NoSQL databases’ are probably wrong ‣ “NoSQL databases can’t do joins” ‣ “NoSQL databases don’t support transactions” ‣ A lot of different categories ‣ Graph Databases ‣ Data Structure Servers ‣ Aggregate Oriented Databases ‣ Time Series Databases ‣ … 7
8. Aggregate Oriented Database ‣ Martin Fowler’s Description of Key-Value, Document & Column Family ‣ Aggregate Oriented DB: Store an aggregate as one unit ‣ Aggregate: “A cluster of domain objects that can be treated as a single unit” ! ArangoDB ‣ Is an aggregate oriented database ‣ Allow to save documents with logical similarity in collections ‣ Automatic schema recognition for efficient memory handling 8
9. ‣ Example: Computer Science Bibliography ! ! ! ! ! ArangoDB ‣ Is a graph database that supports property graphs ‣ Custom traversals and built-in graph algorithms Graph Database 9 Type: inproceeding Title: Finite Size Effects Type: proceeding Title: Neural Modeling Type: person Name: Anthony C. C. Coolen Label: written Label: published Pages: 99-120 Type: person Name: Snchez-Andrs Label: edited
10. Multi model database 10 I type: spaceshuttle v name: alice Ownership since: 2003
11. Why is that useful? 11 Entity Value Object Identified by… ID Value State is… Mutable Immutable Embed me! Add an edge to me!
12. AQL ‣ AQL is a relational algebra ‣ It features Joins ‣ Simple Example: FOR user IN users FILTER user.active == true RETURN { name: user.name } ‣ Other ways of querying: ‣ Query by Example ‣ Graph Traversals ‣ Foxx for extending your API 12
13. Why you may want a more expressive query language 13 Source: http://www.sarahmei.com/blog/2013/11/11/why-you-should-never-use-mongodb/ users friends commenter liker many many many many one one posts comments likes
14. users friends commenter liker many many many many one one posts comments likes Why you may want a more expressive query language 14 ‣ Model it as you would in a SQL database ‣ comments gets a commenter_id – then do a join
15. users friends commenter liker many many many many one one posts comments likes Why you may want a more expressive query language 15 ‣ Model it as you would in a document store ‣ posts embed comments as an array
16. users friends commenter liker many many many many one one posts comments likes Why you may want a more expressive query language 16 ‣ Model it as you would in a graph database ‣ users as nodes, friendships as edges
17. Example for Aggregation ‣ Retrieve cities with the number of users: FOR u IN users COLLECT city = u.city INTO g RETURN { "city" : city, "numUsersInCity": LENGTH(g) } 17
18. Example for Graph Query ‣ Paths: FOR u IN users LET userRelations = ( FOR p IN PATHS( users, relations, "OUTBOUND" ) FILTER p._from == u._id RETURN p ) RETURN { "user" : u, "relations" : userRelations } 18
19. Extendable through JS ‣ JavaScript extends ArangoDB ‣ Multi Collection Transactions ‣ Extending the Web API ‣ Aggregate data from multiple queries into a single response ‣ Carry out data-intensive operations ‣ Individual Graph Traversals 19
20. ‣ Single Page Web Applications ‣ Native Mobile Applications ‣ ext. Developer APIs ! ‣ ArangoDB has an HTTP API ‣ What if you could talk to the database directly? ‣ It would only need an HTTP API. ‣ What if we could define this API in JavaScript? HTTP APIs 20
21. ArangoDB Foxx 21 /\ (~( ) ) /\_/\ ( _-----_(@ @) ( \ / /|/--\|\ V " " " "
22. Foxx - Simple Example 22 Foxx = require("org/arangodb/foxx"); ! controller = new Foxx.Controller(appContext); ! controller.get("/users ", function(req, res) { res.json({ hello: }); }); req.params("name"); /:name
23. Foxx - More features ‣ Full access to ArangoDB‘s internal APIs: ‣ Simple Queries ‣ AQL ‣ Traversals ‣ … ‣ Automatic generation of interactive documentation ‣ Models and Repositories ‣ Central repository of Foxx apps for re-use and inspiration ‣ Background Worker ‣ Authentication Module (BasicAuth & OAuth 2.0) 23
24. FoxxGenerator ‣ Something I’m working on right now ‣ Build your REST API as a state machine ‣ REST as described by Fielding, not DHH ‣ If you are interested in this topic: Talk to me 24
25. Replication & Sharding ‣ Master/Slave Replication ✓ ‣ Sharding ✓ ‣ Get the whitepaper on our homepage ‣ Up Next: Auto-Failover 25
26. High performance & space efficiency ‣ ArangoDB supports automatic schema recognition, so it is one of the most space efficient document stores. ‣ Although ArangoDB has a wide range of functions, such as MVCC real ACID, schema recognition, etc., it can compete with popular document stores. 26
27. Powerful Admin Interface 27
28. gem 'guacamole' ‣ Can’t believe that gem name was still free ‣ It’s a Data Mapper ‣ http://guacamolegem.org ! ‣ It uses the ArangoDB Driver Ashikawa::Core 28
29. 29 class PoniesCollection! include Guacamole::Collection! end! ! class Pony! include Guacamole::Model! ! attribute :name, String! attribute :color, String! ! validates :name, presence: true! end! ! pinkie = Pony.new(name: "Pinkie Pie")! PoniesCollection.save pinkie
30. Special Announcement 30 @horseconf (I’m @moonbeamlabs on Twitter, thanks!)