neo4j-examples / Movies Java Spring Data Neo4j 3
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== Spring Data Neo4j with Spring Boot and Spring Data Rest - Movies Example Application
Spring Data Neo4j was the first Spring Data project, started by the CEOs Rod Johnson and Emil Eifrem. It enables convenient integration of Neo4j in your Spring-based application. It provides object-graph mapping functionality and other features common to the Spring Data projects.
To use Neo4j with Spring Data Neo4j, you just add the dependency for http://projects.spring.io/spring-boot/[Spring-Boot] and http://projects.spring.io/spring-data-neo4j[Spring-Data-Neo4j] to your build setup.
[source,xml]
include::pom.xml[tags=dependencies]
After setting up a Java-based Spring-Boot configuration,
[source,java]
include::src/main/java/movies/spring/data/neo4j/MyNeo4jConfiguration.java[tags=config]
and annotating your @Node- and @RelationshipEntity, you can use the Neo4jTemplate to access Neo4j APIs and object graph mapping functionality.
[source,java]
include::src/main/java/movies/spring/data/neo4j/domain/Movie.java[tags=movie]
Additionally you can leverage the convenient Spring-Data repositories to get interface-based DAO implementations injected into your Spring Components.
[source,java]
include::src/main/java/movies/spring/data/neo4j/repositories/MovieRepository.java[tags=repository]
In our case we use the repository from a MovieService to compute the graph representation for the visualization.
The service is then injected into our main Boot application, which also doubles as @RestMvcController which exposes the /graph endpoint.
The other two endpoints for finding multiple movies by title and loading a single movie are provided out of the box by the http://projects.spring.io/spring-data-rest/[Spring-Data-Rest project] which exposes our MovieRepository as REST endpoints.
The rendering of the movie objects (and related entities) happens automatically out of the box via Jackson mapping.
See the {github}/examples/java/spring-data-neo4j[GitHub repository] for the source code.
[NOTE] The current version of Spring Data Neo4j works best with an embedded Neo4j database. To achieve highest-performance Neo4j-Server integration move your SDN persistence layer into a Server Extension. // Work on improving the Spring Data Neo4j performance with Neo4j server is underway.
=== The Stack
These are the components of our Web Application:
- Application Type: Spring-Boot Java Web Application (Jetty)
- Web framework: Spring-Boot enabled Spring-WebMVC, Spring-Data-Rest
- Persistence Access: Spring-Data-Neo4j
- Database: Neo4j-Server
- Frontend: jquery, bootstrap, http://d3js.org/[d3.js]
=== Endpoints:
Get Movie
// JSON object for single movie with cast curl http://localhost:8080/movies/search/findByTitle?0=The%20Matrix
// list of JSON objects for movie search results curl http://localhost:8080/movies/search/findByTitleContaining?0=matrix