204 lines
7.7 KiB
Plaintext
204 lines
7.7 KiB
Plaintext
image:https://spring.io/badges/spring-data-neo4j/ga.svg[title=Spring Data Neo4j,link=https://projects.spring.io/spring-data-neo4j#quick-start]
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image:https://spring.io/badges/spring-data-neo4j/snapshot.svg[title=Spring Data Neo4j,link=https://projects.spring.io/spring-data-neo4j#quick-start]
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= Spring Data Neo4j
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The primary goal of the https://projects.spring.io/spring-data[Spring Data] project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services.
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The Spring Data Neo4j project aims to provide a familiar and consistent Spring-based programming model for integrating with the https://neo4j.com/[Neo4j] Graph Database.
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== Code of Conduct
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This project is governed by the link:CODE_OF_CONDUCT.adoc[Spring Code of Conduct]. By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
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== Getting Started
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Here is a quick teaser of an application using Spring Data Repositories in Java:
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[source,java]
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----
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@NodeEntity
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public class Person {
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private Long id;
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private String name;
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@Relationship(type = "FRIEND", direction = "OUTGOING")
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private Set<Person> friends;
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public Person() {}
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public Person(String name) { this.name = name; }
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private void knows(Person friend) { friends.add(friend); }
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}
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@Repository
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public interface PersonRepository extends Neo4jRepository<Person, Long> {
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List<Person> findByName(String name);
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List<Person> findByNameLike(String name);
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}
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@Service
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public class MyService {
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@Autowired
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private final PersonRepository repository;
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@Transactional
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public void doWork() {
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Person jon = new Person("Jon");
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Person emil = new Person("Emil");
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Person rod = new Person("Rod");
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emil.knows(jon);
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emil.knows(rod);
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// Persist entities and relationships to graph database
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personRepository.save(emil);
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for (Person friend : emil.getFriends()) {
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System.out.println("Friend: " + friend);
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}
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// Control loading depth
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Person thatSamejon = personRepository.findOne(id, 2);
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for (Person friend : jon.getFriends()) {
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System.out.println("Jon's friends to depth 2: " + friend);
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}
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}
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}
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@Configuration
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@ComponentScan
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@EnableNeo4jRepositories
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@EnableTransactionManagement
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public class MyConfiguration {
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@Bean
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public SessionFactory sessionFactory(org.neo4j.ogm.config.Configuration configuration) {
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// with domain entity base package(s)
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return new SessionFactory(configuration, "com.example.person.domain");
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}
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@Bean
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public org.neo4j.ogm.config.Configuration configuration() {
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org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration.Builder()
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.uri("bolt://localhost")
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.credentials("user", "secret")
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.build();
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return configuration;
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}
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@Bean
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public Neo4jTransactionManager transactionManager() {
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return new Neo4jTransactionManager(sessionFactory());
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}
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}
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----
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=== Maven configuration
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Add the Maven dependency:
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[source,xml]
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----
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<dependency>
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<groupId>org.springframework.data</groupId>
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<artifactId>spring-data-neo4j</artifactId>
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<version>${version}.RELEASE</version>
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</dependency>
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----
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If you'd rather like the latest snapshots of the upcoming major version, use our Maven snapshot repository and declare the appropriate dependency version.
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[source,xml]
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----
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<dependency>
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<groupId>org.springframework.data</groupId>
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<artifactId>spring-data-neo4j</artifactId>
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<version>${version}.BUILD-SNAPSHOT</version>
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</dependency>
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<repository>
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<id>spring-libs-snapshot</id>
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<name>Spring Snapshot Repository</name>
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<url>https://repo.spring.io/libs-snapshot</url>
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</repository>
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----
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Please find the setup for Gradle based projects in the the https://docs.spring.io/spring-data/data-neo4j/docs/current/reference/html/[Reference Manual].
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Spring Data Neo4j provides support for connecting to all of Neo4j's java drivers:
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* Bolt
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* HTTP
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* Embedded
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Depending on your need, you'll have to add one additional Neo4j-OGM module.
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Please refer to the reference linked above.
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== Getting Help
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Having trouble with Spring Data? We’d love to help!
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* Check the
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https://docs.spring.io/spring-data/neo4j/docs/current/reference/html/[reference documentation], and https://docs.spring.io/spring-data/neo4j/docs/current/api/[Javadocs].
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* Learn the Spring basics – Spring Data builds on Spring Framework, check the https://spring.io[spring.io] web-site for a wealth of reference documentation.
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If you are just starting out with Spring, try one of the https://spring.io/guides[guides].
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* If you are upgrading, check out the https://docs.spring.io/spring-data/neo4j/docs/current/changelog.txt[changelog] for "`new and noteworthy`" features.
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* Ask a question - we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/questions/tagged/spring-data-neo4j-5[spring-data-neo4j-5].
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* Report bugs with Spring Data Neo4j at https://jira.spring.io/browse/DATAGRAPH[jira.spring.io/browse/DATAGRAPH].
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== Reporting Issues
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Spring Data uses JIRA as issue tracking system to record bugs and feature requests. If you want to raise an issue, please follow the recommendations below:
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* Before you log a bug, please search the
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https://jira.spring.io/browse/DATAGRAPH[issue tracker] to see if someone has already reported the problem.
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* If the issue doesn’t already exist, https://jira.spring.io/browse/DATAGRAPH[create a new issue].
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* Please provide as much information as possible with the issue report, we like to know the version of Spring Data that you are using and JVM version.
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* If you need to paste code, or include a stack trace use JIRA `{code}…{code}` escapes before and after your text.
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* If possible try to create a test-case or project that replicates the issue. Attach a link to your code or a compressed file containing your code.
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== Building from Source
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You don’t need to build from source to use Spring Data (binaries in https://repo.spring.io[repo.spring.io]), but if you want to try out the latest and greatest, Spring Data can be easily built with the https://github.com/takari/maven-wrapper[maven wrapper].
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You also need JDK 1.8.
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[source,bash]
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----
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$ ./mvnw clean install
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----
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If you want to build with the regular `mvn` command, you will need https://maven.apache.org/run-maven/index.html[Maven v3.5.0 or above].
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_Also see link:CONTRIBUTING.adoc[CONTRIBUTING.adoc] if you wish to submit pull requests, and in particular please sign the https://cla.pivotal.io/sign/spring[Contributor's Agreement] before your first non-trivial change._
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=== Building reference documentation
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Building the documentation builds also the project without running tests.
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[source,bash]
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----
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$ ./mvnw clean install -Pdistribute
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----
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The generated documentation is available from `target/site/reference/html/index.html`.
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== Guides
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The https://spring.io/[spring.io] site contains several guides that show how to use Spring Data step-by-step:
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* https://spring.io/guides/gs/accessing-data-neo4j/[Accessing Data with Neo4j] is a very basic guide that shows you how to create a simple application and how to access data using repositories.
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* https://spring.io/guides/gs/accessing-neo4j-data-rest/[Accessing Neo4j Data with REST] is a guide to creating a REST web service exposing data stored in Neo4j through repositories.
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== Examples
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* https://github.com/spring-projects/spring-data-examples/[Spring Data Examples] contains example projects that explain specific features in more detail.
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== License
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Spring Data Neo4j is Open Source software released under the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].
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