Pouring Coffee into the Matrix: Java Applications on Neo4j

Many of us have built applications for traditional data structures (like relational database tables), but is it different for graph data stores? In this session, we will cover a brief intro to graphs and build a typical Java application for a graph database. See how to amplify the power of connected data with applications!

1. Jennifer Reif Email: jennifer.reif@neo4j.com Twitter: @JMHReif LinkedIn: linkedin.com/in/jmhreif Github: github.com/JMHReif Website: jmhreif.com Pouring Coffee into the Matrix Java applications on Neo4j
2. Who Am I? • Developer + Advocate • Continuous learner • Technical content writer • Conference speaker • Other: geek Jennifer Reif Email: jennifer.reif@neo4j.com Twitter: @JMHReif LinkedIn: linkedin.com/in/jmhreif Github: github.com/JMHReif Website: jmhreif.com
3. What is graph?
4. What is a graph? • Graph much older than technology of the last decade… • Arose from solution need (then and now) Seven Bridges of Konigsberg problem. Leonhard Euler, 1735
5. Java domain • Find fi eld changes between Java 17 and Java 8? • Update doc URL for a Class • Find most similar di ff s (which a ff ected same components)
6. Enter stage right - graphs • Document path (not just data) • Answering how and why • Understanding connections • Find alternates, impacts, etc • Produce better assumptions, decisions
7. Understanding the model
8. Whiteboard friendliness
9. Graph data
10. Graph components • Node (vertex) • Objects Michael Jennifer Neo4j Graphs
11. Graph components • Node (vertex) • Objects • Relationship (edge) • Connections Michael Jennifer Neo4j Graphs :LIKES :WORKS_FOR :IS_FRIENDS_WITH
12. Developing applications
13. Language drivers • Neo4j Java driver (o ffi cial) • Spring Data Neo4j • Uses Neo4j Java driver at base • Other options: • O ffi cial drivers-> Python, JavaScript, Go, .NET • Java frameworks-> Quarkus, Helidon, Micronaut, etc
14. Spring provisions • Spring Initializr • Spring Boot’s reduction of boilerplate • Annotation-based OGM for POJOs • Query derivation + DSL for custom (Cypher) • Spring Data’s easy connection to Neo4j • BOLT
15. Let’s see some code! Demo time!
16. Resources • Source code: github.com/JMHReif/pouring-co ff ee-into-matrix-lombok • Spring Data Neo4j documentation: dev.neo4j.com/sdn-docs • SDN reactive: github.com/JMHReif/sdnrx-marvel-basic • Neo4j AuraDB: dev.neo4j.com/aura (FREE instance!) Jennifer Reif Email: jennifer.reif@neo4j.com Twitter: @JMHReif LinkedIn: linkedin.com/in/jmhreif Github: GitHub.com/JMHReif Website: jmhreif.com