Spring Data KeyValue

The primary goal of the 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.

This module provides infrastructure components to build repository abstractions for stores dealing with Key/Value pairs and ships with a default java.util.Map based implementation.

Features

• Infrastructure for building repositories on top of key/value implementations.

• Dynamic SpEL query generation from query method names.

• Possibility to integrate custom repository code.

Code of Conduct

This project is governed by the Spring Code of Conduct. By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to [email protected].

Getting Started

Here is a quick teaser of an application using Spring Data Repositories in Java:

public interface PersonRepository extends CrudRepository<Person, Long> {

    List<Person> findByLastname(String lastname);

    List<Person> findByFirstnameLike(String firstname);
}

@Service
public class MyService {

    private final PersonRepository repository;

    public MyService(PersonRepository repository) {
        this.repository = repository;
    }

    public void doWork() {

        repository.deleteAll();

        Person person = new Person();
        person.setFirstname("Oliver");
        person.setLastname("Gierke");
        repository.save(person);

        List<Person> lastNameResults = repository.findByLastname("Gierke");
        List<Person> firstNameResults = repository.findByFirstnameLike("Oli*");
    }
}

@KeySpace("person")
class Person {

    @Id String uuid;
    String firstname;
    String lastname;

    // getters and setters omitted for brevity
}

@Configuration
@EnableMapRepositories("com.acme.repositories")
class AppConfig { … }

Maven configuration

Add the Maven dependency:

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-keyvalue</artifactId>
    <version>${version}.RELEASE</version>
</dependency>

If you’d rather like the latest snapshots of the upcoming major version, use our Maven snapshot repository and declare the appropriate dependency version.

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-keyvalue</artifactId>
    <version>${version}-SNAPSHOT</version>
</dependency>

<repository>
    <id>spring-snapshot</id>
    <name>Spring Snapshot Repository</name>
    <url>https://repo.spring.io/snapshot</url>
</repository>

Getting Help

Having trouble with Spring Data? We’d love to help!

• Check the reference documentation, and Javadocs.

• Learn the Spring basics – Spring Data builds on Spring Framework, check the spring.io web-site for a wealth of reference documentation. If you are just starting out with Spring, try one of the guides.

• If you are upgrading, check out the release notes for “new and noteworthy” features.

• Ask a question - we monitor stackoverflow.com for questions tagged with spring-data-keyvalue. You can also chat with the community on Gitter.

• Report bugs with Spring Data KeyValue via Github.

Reporting Issues

Spring Data uses Github as issue tracking system to record bugs and feature requests. If you want to raise an issue, please follow the recommendations below:

• Before you log a bug, please search the issue tracker to see if someone has already reported the problem.

• If the issue does not already exist, create a new issue.

• Please provide as much information as possible with the issue report, we like to know the version of Spring Data that you are using, the JVM version, Stacktrace, etc.

• If you need to paste code, or include a stack trace use Markdown code fences ```.

• 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.

Building from Source

You don’t need to build from source to use Spring Data (binaries in repo.spring.io), but if you want to try out the latest and greatest, Spring Data can be easily built with the maven wrapper. You also need JDK 17.

 $ ./mvnw clean install

If you want to build with the regular mvn command, you will need Maven v3.5.0 or above.

Also see CONTRIBUTING.adoc if you wish to submit pull requests, and in particular please sign the Contributor’s Agreement before your first change, is trivial.

Building reference documentation

Building the documentation builds also the project without running tests.

 $ ./mvnw clean install -Pantora

The generated documentation is available from target/antora/site/index.html.

Examples

• Spring Data Examples contains example projects that explain specific features in more detail.

License

Spring Data KeyValue is Open Source software released under the Apache 2.0 license.