building killer apps with neo4j 2.0

(graphs)-[:are]->(everywhere)

Building�� Killer�� Apps�� with�� Neo4j

© All Rights Reserved 2014 | Neo Technology, Inc.

@kennybastani

Neo4j�� Developer�� Evangelist

Agenda

• An Introduction to Graph-based Modeling

• A Tour of Neo4j’s Browser

• How to Build Graph-based Web App for Movies

• How to Design a Graph-based Neo4j REST API

• An Introduction to Cypher (Neo4j’s Query Language)

• How to Translate Questions Into Cypher Queries


Introduction�� to�� Graph-based�� modeling

© All Rights Reserved 2014 | Neo Technology, Inc.© All Rights Reserved 2013 | Neo Technology, Inc.© All Rights Reserved 2014 | Neo Technology, Inc.

Start�� with�� a�� whiteboard


Adam

LOL Cat

FRIEND_OFSHARED

COMMENTED

SarahFUNNY

ON

LIKES

6


Adam

LOL Cat

FRIEND_OFSHARED

COMMENTED

SarahFUNNY

ON

LIKES

7


Tom Hanks Hugo Weaving

Cloud AtlasThe Matrix

Lana Wachowski

ACTED_IN

ACTED_INACTED_IN

DIRECTED

DIRECTED9


Model�� Incrementally


Tom Hanks Hugo Weaving

Cloud AtlasThe Matrix

Lana Wachowski

ACTED_IN

ACTED_INACTED_IN

DIRECTED

DIRECTED11


name: Tom Hanks nationality: USA won: Oscar, Emmy

name: Hugo Weaving nationality: Australia won: MTV Movie Award

title: Cloud Atlas genre: drama, sci-fi

title: The Matrix genre: sci-fi

name: Lana Wachowski nationality: USA won: Razzie, Hugo

ACTED_IN role: Zachry

ACTED_IN role: Bill Smoke

DIRECTED

DIRECTED

ACTED_IN role: Agent Smith

12

Tour�� of�� Neo4j


http://localhost:7474/

Neo4j�� Browser�� -�� finding�� help

14

http://localhost:7474


Neo4j�� Browser�� Execute�� Cypher,�� Visualize

15


Neo4j�� Browser�� -�� importing�� sample�� data

16

Neo4j�� Data�� browser�� -�� display�� more�� data

Movies�� Sample�� App

Architecture

Neo4j�� Backend

Swagger�� REST�� API

Angular�� Front-end

Designing�� a�� REST�� API

• Start with listing out the questions you want to answer

• Get all the movies and their genre

• Get a movie an its properties

• Get actors who acted in a movie

• Get an actor and their properties

• Recommend similar movies

• Recommend similar actors

Answering�� your�� questions�� using�� Cypher


Introduction�� to�� Cypher


Cypher�� is�� Neo4j's�� graph�� query�� language��

•Declarative�� Pattern-Matching�� language�� •SQL-like�� syntax�� •Designed�� for�� graphs

27


It’s�� all�� about�� Patterns

28

A

B C


How?��


(a) --> (b)

a b

Text�� Art

32


Paths

33

MATCH (a)-[:ACTED_IN]->(m)<-[:DIRECTED]-(d) RETURN a.name, m.title, d.name;

a

mACTED IN

d

DIRECTED

Translating�� Questions�� Into�� Cypher


Get�� all�� movies�� and�� their�� genre

35


Get�� all�� movies�� and�� their�� genre

36


Get�� a�� single�� movie

37


Get�� a�� single�� movie

38


Get�� actors�� who�� acted�� in�� a�� movie

39


Get�� actors�� who�� acted�� in�� a�� movie

40


Get�� a�� single�� actor

41


Get�� a�� single�� actor

42


Get�� similar�� movies�� by�� shared�� keywords

43


Get�� similar�� movies�� by�� shared�� keywords

44


Get�� similar�� actors�� by�� co-appearance

45


Get�� similar�� actors�� by�� co-appearance

46

Building�� the�� Neo4j�� Swagger�� REST�� API

GitHub�� Repositories

• https://github.com/kbastani/node-neo4j-swagger-api

• https://github.com/kbastani/neo4j-app-movies-ui

https://github.com/kbastani/node-neo4j-swagger-api

https://github.com/kbastani/neo4j-app-movies-ui


Get�� involved�� in�� the�� community


http://stackoverflow.com/questions/tagged/neo4j

http://stackoverflow.com/questions/tagged/neo4j


http://groups.google.com/group/neo4j

http://groups.google.com/group/neo4j


https://github.com/neo4j/neo4j/issues

https://github.com/neo4j/neo4j/issues


http://neo4j.meetup.com/

http://neo4j.meetup.com/

(Thank�� You)

Get�� in�� touch

Twitter: @kennybastani

LinkedIn: /in/kennybastani

http://www.twitter.com/kennybastani

http://www.linkedin.com/in/kennybastani