Neo4J Demo

About

This is a simple Java + Spring Boot project which uses Neo4J with Spring Data. The project shows how a simple domain model can be implemented with some basic use-cases.

Note

• To show different approaches, the same thing might be implemented in different ways in the code.
• I've used comments throughout the code to underline the ideas.

What to see here

• Basic project setup (Java + Spring Boot + Neo4J + Spring Data)
• Domain Model (Product <> Shop <> Location)
• Implementation of repositories
• Partial read and write operations using projections
• Some REST-controllers
• Tests
• Use of Lombok for clean code

Run locally

docker run --publish=7474:7474 --publish=7687:7687 --env=NEO4J_AUTH=none neo4j:4.3.6

./gradlew bootrun

Run the tests

./gradlew check

Docs

http://localhost:8080/swagger-ui/index.html

Login to Neo4J Web Console

http://localhost:7474/browser/
With: neo4j / neo4j

See: https://hub.docker.com/_/neo4j

Example query

Find all products which are sold in "Karlsruhe":

MATCH (p:product)-[r:SOLD_BY]->(s:shop)
WHERE EXISTS {
    MATCH (s)-[:LOCATED_AT]->(:location {city: 'Karlsruhe'})
}
RETURN p.name, s.name

Result:

p.name	         |  s.name
-----------------+------------
"USB Cabel"	     |  "ATU"
"Cleaning Spray" |  "ATU"