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https://github.com/neo4j/neo4j-ogm-quarkus

Quarkus extension to that allows proper usage of Neo4j-OGM inside Quarkus.
https://github.com/neo4j/neo4j-ogm-quarkus

neo4j neo4j-ogm quarkus

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Quarkus extension to that allows proper usage of Neo4j-OGM inside Quarkus.

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README 

        
= Neo4j-OGM Quarkus Extension

Michael Simons 

:doctype: article

:lang: en

:listing-caption: Listing

:source-highlighter: coderay

:icons: font

:latest_version: 3.9.0

:groupId: org.neo4j

:artifactId: neo4j-ogm-quarkus

:branch: main



[abstract]

--

This is an extension for https://quarkus.io[Quarkus.io], depending on the official https://github.com/quarkiverse/quarkus-neo4j[Quarkus Neo4j Extension].

Neo4j-OGM Quarkus configures https://github.com/neo4j/neo4j-ogm[Neo4j-OGM] to use

the low-level connectivity provided by the Quarkus Neo4j extension.

--



image:https://github.com/neo4j/neo4j-ogm-quarkus/workflows/build/badge.svg[link=https://github.com/michael-simons/neo4j-ogm-quarkus/actions]

image:https://maven-badges.herokuapp.com/maven-central/org.neo4j/neo4j-ogm-quarkus/badge.svg[link=https://maven-badges.herokuapp.com/maven-central/org.neo4j/neo4j-ogm-quarkus]



== Introduction



This extension is meant to be used on top of https://github.com/quarkiverse/quarkus-neo4j[Quarkus Neo4j Extension].

It uses the driver provided with the latter to configure Neo4j-OGMs `SessionFactory`, so that you can get an instance in

beans like this:



[source,java]

----

import java.util.Collection;



import jakarta.enterprise.context.ApplicationScoped;



import org.neo4j.ogm.session.SessionFactory;



@ApplicationScoped

public class MovieRepository {



	private final SessionFactory sessionFactory;



	MovieRepository(SessionFactory sessionFactory) {

		this.sessionFactory = sessionFactory;

	}



	public Collection findAll() {

		return sessionFactory.openSession().loadAll(Movie.class);

	}

}

----



In addition, it will take care that all classes annotated with `@NodeEntity` and `@RelationshipEntity` are discovered by

Quarkus in both JVM and native mode.



NOTE: Please note that this extension only supports connections via the Bolt-protocol.



== Downloads



Maven artifacts are available on https://search.maven.org/artifact/org.neo4j/neo4j-ogm-quarkus[central] under

the following coordinates: `{groupId}:{artifactId}:{latest_version}`.



NOTE: There is no need to declare any other dependency (for Neo4j-OGM or Quarkus-Neo4j, this extension here brings both of them).



=== Include in a Maven build



[source,xml,subs="verbatim,attributes"]

----



    {groupId}

    {artifactId}

    {latest_version}



----



=== Include in a Gradle build



[source,groovy,subs="verbatim,attributes"]

----

dependencies {

    implementation '{groupId}:{artifactId}:{latest_version}'

}

----



== Manual



The underlying Neo4j-Driver extension is documented in the Quarkiverse: https://quarkiverse.github.io/quarkiverse-docs/quarkus-neo4j/dev/index.html[Quarkus Neo4j].

The Neo4j-OGM manual is https://neo4j.com/docs/ogm-manual/current/[here].



There is little to be configured in this extension itself apart from a few properties:



[.configuration-reference, cols="80,.^10,.^10"]

|===



h|Configuration property



h|Type

h|Default



a|🔒 `org.neo4j.ogm.base-packages`



[.description]

--

An optional list of packages to scan. If empty, all classes annotated with `org.neo4j.ogm.annotation.NodeEntity @NodeEntity` or `org.neo4j.ogm.annotation.RelationshipEntity @RelationshipEntity` will be added to the index.

--|list of string

|



a| `org.neo4j.ogm.use-native-types`



[.description]

--

Should Neo4j native types be used for dates, times and similar?

--|boolean

|`false`



a| `org.neo4j.ogm.use-strict-querying`



[.description]

--

This flag instructs OGM to use all static labels when querying domain objects.

--|boolean

|`false`



a| `org.neo4j.ogm.database`



[.description]

--

The database that should be used (Neo4j EE 4.0{plus} only). Leave empty for using the default database.

--|string

|



|===



[.configuration-legend]

🔒 Configuration property fixed at build time - All other configuration properties are overridable at runtime



== Dependencies



The `integration-tests` module is a good candidate for showing how the dependencies flow in the Neo4j-Quarkus ecosystem:



image::docs/img/dependencies.png[]



`quarkus-neo4j` - the official Quarkiverse extension - sits in the middle. It provides the `neo4j-java-driver`, the essential connectivity.

Depending on it are `neo4j-ogm-quarkus` (this project) and inside the integration tests, `neo4j-migration-quarkus` which runs the Cypher-scripts

with our test data for us.

`neo4j-ogm-quarkus` brings the necessary dependencies for Neo4j-OGM itself, and of course, contains all the Quarkus "magic" to make things work

nicely together.