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MongoDB @ VRT

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Content

▪ Status▪ Technology Stack▪ MongoDB Technology Stack▪ How we Use MongoDB

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m.redactie.be

▪ Yes, we are Live▪ Please check the website later, not now ;-)

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Technology Stack

▪ AngularJS

▪ Spring MVC / REST

▪ MongoDB

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MongoDB: Technology Stack

▪ MongoDB version 2.4.9- 2.6 is going to be investigated after the elections 25/05

▪ RoboMongo (http://robomongo.org/) and the mongo-shell are used as view on the DB.- Downside of RoboMongo : "copy JSON" produces invalid JSON =>

ISOdate and ObjectID- Change is underway but RoboMongo is written in C++ so can't help, feel

free to do so- Will check for alternatives later, anyone already experience with others?

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How We Use It

▪ JavaDriver 2.12▪ No ORM, hardcore java FTW▪ BasicDbObject and QueryBuilder, latter provides a fluent api (add

example)

Application Side

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How we use it

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How We Use It

▪ NoSQL Unit https://github.com/lordofthejars/nosql-unit/

▪ UsingDataSet and @ShouldMatchDataSet uses JSON files to insert data and check data

▪ Created custom comparison strategy for more fine grained control of what and how to check the resulting data se

Integration Testing

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How We Use It

▪ Replica set :- 1 primary - 4 secondaries- Read-preference : secondary preferred

- Eventual consistency is ok for our application

▪ No sharding (yet?)

DB Side

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How We Use It

▪ All queries are indexed, dramatical increase of performance- not covered queries, to much data, sometimes big articles- if data-set fits in RAM, full-covered query has small to no performance gain- indexes created based on profiling (system.profile) and query.explain. Use

it, the knowledge you get from is extremely useful.

DB Side

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Questions ?