Spring Data: Bridging Multiple Databases/

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Reactive Neo4j

Reactive Neo4j

Learn about nonblocking access to Neo4j using reactive programming with Spring Data Neo4j.

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Reactive programming in Spring Data Neo4j enables asynchronous, nonblocking interactions with the Neo4j graph database. It utilizes reactive streams and the Reactor project to handle data in a more scalable and efficient manner, allowing better support for concurrent and reactive applications.

Quick setup

First, we should add the spring-boot-starter-webflux Spring Boot starter data dependency to the build.gradle file to enable reactive programming support with Spring Data Neo4j.

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plugins {
    id 'java'
    id 'org.springframework.boot' version '3.0.2'
    id 'io.spring.dependency-management' version '1.1.0'
}
group = 'com.smartdiscover'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '17'
repositories {
    mavenCentral()
}
dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-neo4j'
    implementation 'org.springframework.boot:spring-boot-starter-webflux'
    implementation 'org.projectlombok:lombok:1.18.26'
    annotationProcessor 'org.projectlombok:lombok'
}

The ReactiveNeo4jRepository interface

The ReactiveNeo4jRepository interface comes with the Spring Data Neo4j framework for reactive programming, extending interfaces like ReactiveSortingRepository, ReactiveQueryByExampleExecutor, and ReactiveCrudRepository.

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public interface ReactiveNeo4jRepository<T, ID>
		extends ReactiveSortingRepository<T, ID>, ReactiveQueryByExampleExecutor<T>, ReactiveCrudRepository<T, ID> {}

The ReactiveAuthorRepository interface

Now, let’s create the ReactiveAuthorRepository interface in the com.smartdiscover.repository package, extending the ... ...