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!

Transcript

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
   

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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
   

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3. What is graph?
   

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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
   

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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)
   

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6. Enter stage right - graphs
   • Document path (not just data)
   
   • Answering how and why
   
   • Understanding connections
   
   • Find alternates, impacts, etc
   
   • Produce better assumptions, decisions
   

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7. Understanding the model
   

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8. Whiteboard friendliness
   

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9. Graph data
   

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10. Graph components
    • Node (vertex)
    
    • Objects
    Michael
    Jennifer
    Neo4j
    Graphs
    

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11. Graph components
    • Node (vertex)
    
    • Objects
    
    • Relationship (edge)
    
    • Connections
    Michael
    Jennifer
    Neo4j
    Graphs
    :LIKES
    :WORKS_FOR
    :IS_FRIENDS_WITH
    

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12. Developing applications
    

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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
    

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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
    

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15. Let’s see some code!
    Demo time!
    

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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
    

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