MongoDB + Spring

Norberto Leite

@nleite

norberto@mongodb.com

http://www.mongodb.com/norberto

Two leafs of the same tree

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Agenda

• MongoDB Introduction

– Just in case you've been distracted

• Spring Framework Overview

• Spring + MongoDB

– Spring Data

– Spring Boot

– Spring Batch

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Ola, I'm Norberto!

Norberto Leite

Technical Evangelist

Madrid, Spain

@nleite

norberto@mongodb.com

http://www.mongodb.com/norberto

MongoDB

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MongoDB

GENERAL PURPOSE DOCUMENT DATABASE OPEN-SOURCE

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MONGODB FEATURES

JSON Document Model

with Dynamic Schemas

Auto-Sharding for

Horizontal Scalability

Text Search

Aggregation Framework

and MapReduce

Full, Flexible Index Support

and Rich Queries

Built-In Replication

for High Availability

Advanced Security

Large Media Storage

with GridFS

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THE LARGEST ECOSYSTEM

9,000,000+MongoDB Downloads

250,000+Online Education Registrants

35,000+MongoDB User Group Members

35,000+MongoDB Management Service (MMS) Users

750+Technology and Services Partners

2,000+Customers Across All Industries

Document Data Model

Relational MongoDB

{

first_name: ‘Paul’,

surname: ‘Miller’,

city: ‘London’,

location:

[45.123,47.232],

cars: [

{ model: ‘Bentley’,

year: 1973,

value: 100000, … },

{ model: ‘Rolls Royce’,

year: 1965,

value: 330000, … }

]

}

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Documents are Rich Data Structures

{

first_name: ‘Paul’,

surname: ‘Miller’,

cell: ‘+447557505611’

city: ‘London’,

location: [45.123,47.232],

Profession: [banking, finance, trader],

cars: [

{ model: ‘Bentley’,

year: 1973,

value: 100000, … },

{ model: ‘Rolls Royce’,

year: 1965,

value: 330000, … }

]

}

Fields can contain an array of sub-

documents

Fields

Typed field values

Fields can contain

arrays

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Document Model Benefits

Agility and flexibility

Data model supports business change

Rapidly iterate to meet new requirements

Intuitive, natural data representation

Eliminates ORM layer

Developers are more productive

Reduces the need for joins, disk seeks

Programming is more simple

Performance delivered at scale

{

_id : ObjectId("4c4ba5e5e8aabf3"),

employee_name: "Dunham, Justin",

department : "Marketing",

title : "Product Manager, Web",

report_up: "Neray, Graham",

pay_band: “C",

benefits : [

{ type : "Health",

plan : "PPO Plus" },

{ type : "Dental",

plan : "Standard" }

]

}

Dynamic Schema

{

policyNum: 123,

type: auto,

customerId: abc,

payment: 899,

deductible: 500,

make: Taurus,

model: Ford,

VIN: 123ABC456,

}

{

policyNum: 456,

type: life,

customerId: efg,

payment: 240,

policyValue: 125000,

start: jan, 1995

end: jan, 2015

}

{

policyNum: 789,

type: home,

customerId: hij,

payment: 650,

deductible: 1000,

floodCoverage: No,

street: “10 Maple Lane”,

city: “Springfield”,

state: “Maryland”

}

Query Operators

Conditional Operators $all, $exists, $mod, $ne, $in, $nin, $nor, $or, $size,

$type

$lt, $lte, $gt, $gte

// find customers with any claims

> db.customers.find( {claims: {$exists: true }} )

// find customers matching a regular expression

> db.customers.find( {last: /^rog*/i } )

// count customers by city

> db.customers.find( {city: ‘Philadelphia’} ).count()

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Indexes

// Index nested documents

> db.customers.ensureIndex({“policies.agent”:1} )

> db.customers.find({‘policies.agent’:’Fred’})

// geospatial index

> db.customers.ensureIndex({“property.location”: “2d” } )

> db.customers.find({“property.location” : { $near : [22,42] }} )

// text index

> db.customers.ensureIndex({“policies.notes”: “text” } )

MongoDB is Fully Featured

Spring Framework

Not just a framework!

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Spring Framework

Spring Projects

Spring & MongoDB

Same Tree?

Let's put these 2 to work!

Build a "cool" App

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Nice and simple

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Video Catalog App

• All videos from our Education platform

– Yes, we have the coolest framework ever for

remote education!

https://university.mongodb.com/

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Video Catalog App

• All videos from our Education platform

– Yes, we have the coolest framework ever for

remote education!

• Load information into MongoDB

• Allow people to vote on videos

• Find videos based on the metadata

• All using Spring Projects

– Let's also look into optimizations

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Stack

MongoDB

DAL – Database Access Layer

demo.springio.batch REST API

CODE, CODE, CODE

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DAL

• Decoupling Database

– Rule n1 on good Software Development

• Base Library

• Simple

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Batch

• Batch Configuration Class

– reader()

– writer()

@Configuration

@EnableBatchProcessing

• ItemProcessor()

– Excellent way to do pre-aggregations,

computations…

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Batch

• Things to look for

– chunk(chunkSize)

• Keep an eye on this value to optmise the loading

process

– writer()

• MongoDB bulk insert is here to help

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REST API

@RestController

@RequestMapping("/…")

@EnableAutoConfiguration

… extends MongoRepository<T, I>

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REST API

• Things to have in mind

– MongoRepository is "just" CRUD repository

• Need to autowire MongoTemplate to aggregate

– Updates

• Not a particular issue of SpringData

• General thing of ODM's

http://1.bp.blogspot.com/-H40bE-rJUqk/UXo3YatYjqI/AAAAAAAAAho/zjrQVk3WrNA/s1600/paella_03.jpg

Take Ways

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Recap

• Spring has a lot of things out of the box that we do not

need to reinvent the all the time

• MongoDB can easily be integrated with existing Spring

based projects

• Performance is important

• Continuous Improvement is key!

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Recap

• DOCUMENTATION!

– Awesome and complete on both projects!

We love enterprise!

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MongoDB 3.0 is here!

http://www.humanandnatural.com/data/media/178/badan_jaran_desert_oasis_china.jpghttp://www.tinypm.com/blog/wp-content/uploads/2015/01/hammer.jpg

Fully Available!

3.0.2 https://www.mongodb.org/downloads

http://www.mongodb.com/norberto

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Register now: mongodbworld.com

Early Bird Ends May 1!

Use Code NorbertoLeite for additional 25% Off*Come as a group of 3 or more – Save another 25%

We’re Always Looking for Top Talent

What are employees saying?

“Working with a group of individuals who you know will have your back is

one of the reasons I love working at MongoDB”

“Every day, we get to solve hard problems that make distributed databases

more accessible to developers all over the world”

“MongoDB lets you tackle real problems that affect hundreds of thousands

of users”

Visit us at www.mongodb.com/careers to see a full

list of opportunities or email your resume to

norberto@mongodb.com

What are we hiring for?

• Technical Services Engineers (Dublin)

• Consulting Engineers (UK OR France)

• Solution Architects (France, Spain, Germany)

• Enterprise Account Executives ( France, Italy, UK, Germany)

• Corporate Account Executives (Dublin)

• Renewals Account Managers (Dublin)

Same Tree!!!

http://www.humanandnatural.com/data/media/178/badan_jaran_desert_oasis_china.jpg

Questions?

@nleite

norberto@mongodb.com