Reactive Graph - Java Client

Caution

Note: This is work in progress and not yet useful!

About

This repository contains a client written in Java to access the reactive graph.

The main goal for now is to show that it's possible to use the reactive graph from a non-rust application. Actually, the first working java client has been realized within an evening.

How it works

• A gradle plugin generates POJOs / interfaces for each type in the GraphQL schema.
• Spring Data alike repositories can be defined to build queries and mutations on top of the generated POJOs / interfaces.
• Your application uses the POJOs / interfaces and spring data alike repositories. An example is provided in the example module.

Configuration

In application.properties, point the graphql.endpoint.url to a running instance of reactive-graph:

graphql.endpoint.url=http://localhost:31415/graphql

Example

The example provides a spring boot application that uses the EntityTypeRepository to fetch all EntityTypes.

Build

sdk env # or sdk env install (if you run it the first time)
./gradlew build

Schema to POJO

• https://plugins.gradle.org/plugin/com.graphql-java-generator.graphql-gradle-plugin3
• https://graphql-maven-plugin-project.graphql-java-generator.com/graphql-maven-plugin/project-info.html
• https://github.com/graphql-java-generator/graphql-maven-plugin-project/wiki/client_graphql_repository

Future

The future plan is to provide the same amount of support for the java client as for the rust client.

Why Java?

1. Java provides a huge ecosystem:
   • Neo4j (as graph database) - as source or as target
   • Apache kafka - as producer or as consumer
   • Elasticsearch - for indexing and searching
   • ...
2. Write your application in your language