DomainModel.stream()

Welcome to the Furets !

LesFurets - The Meta Lambda Track

• Lambda Architecture at LesFurets.com - State of the Union
  10:00 - 10:40 | Essex
• From Legacy to Reactive
  10:50 - 11:30 | Norfolk
• Sparks Fly Everywhere
  11:30 - 12:45 | Buckingham A
• JOOQ and JOOλ: How to write clean code with your DAO
  11:40 - 12:20 | Burghley
• Price Competitiveness Hacked by R
  14:30 - 15:10 | Norfolk
• DomainModel.stream()
  15:30 - 16:10 | Essex

• 1 website, 5 Insurance Products : Car, Health, Home, Bike, Loan
• 1 codebase, 450k lines of code, 60k unit tests, 150 selenium tests
• 22 Developers, 2 DevOps, 4 Architects
• 19 production servers including Load balancers, Frontend, Backend, Databases, BI
• 1 release per day
• 8 years of code history
  
• 3M quotes/year, 40% of market share, 4M of customers

Moving the architecture

What you have ...

What you want ...

Que faire ?

Architect at work ...

Keying everything !

A bit of livecoding

Live code 1 : Introduction to key value API

Live code 2 : Mixing with java.util.Map

Live code 3 : Tag filtering

Live code 4 : Generate CQL

Live code 5 : Diff two models

Usages are unlimited

You can use Java 8 stream on your Domain Model !

• FieldModel#stream() : a stream of key/value pair (FieldId/Object)
• FieldModel#parallelStream() : parallel stream and better performance
• Easy use a filter/map/reduce operations on a domain model

Could you write a domain model diff tool now ?

Where we use it at LesFurets.com

• Simple UI binding by replacing JSON model by a Dictionary (80% less code)
• Use JSON Dictionary for client/server RPC
• Batch and ETL with an email provider (90% less code)
• Persistence in cassandra (from scratch with 200 lines of code for a whole model)
• Injecting user data in selenium (40% less code)
• Mocking our domain model in thousand of unit tests

... everything in iterative fashion during the past 2 years.

Future and ideas

• Push as OSS our Cassandra serialisation code
• Push some Spark samples
• JEP 276: Dynamic Linking of Language-Defined Object Models

We need a new name ?

• Model-Map is cool, keep it
• YAMF: Yet Another Mapping Framework
• OWKF: Obi Wan Kenobi Framework
• Submit your ideas

Model-Map available on Github

• https://doov.org
• Framework and examples
• Apache Licence
• Try it and contribute !

Thank You!