= Spring Data Commons image:https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A["Revved up by Develocity", link="https://ge.spring.io/scans?search.rootProjectNames=Spring Data Core"]

https://projects.spring.io/spring-data/[Spring Data Commons] is part of the umbrella Spring Data project that provides shared infrastructure across the Spring Data projects. It contains technology neutral repository interfaces as well as a metadata model for persisting Java classes.

Our primary goals are:

* Powerful Repository and custom object-mapping abstractions
* Support for cross-store persistence
* Dynamic query generation from query method names
* Implementation domain base classes providing basic properties
* Support for transparent auditing (created, last changed)
* Possibility to integrate custom repository code
* Easy Spring integration with custom namespace

== Code of Conduct

This project is governed by the https://github.com/spring-projects/.github/blob/e3cc2ff230d8f1dca06535aa6b5a4a23815861d4/CODE_OF_CONDUCT.md[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.

== Getting Started

=== Maven configuration

Add the Maven dependency:

[source,xml]
----
<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-commons</artifactId>
  <version>${version}</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.

[source,xml]
----
<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-commons</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
https://docs.spring.io/spring-data/commons/docs/current/reference/html/[reference documentation], and https://docs.spring.io/spring-data/commons/docs/current/api/[Javadocs].
* 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.
If you are just starting out with Spring, try one of the https://spring.io/guides[guides].
* If you are upgrading, check out the https://github.com/spring-projects/spring-data-commons/releases[GitHub releases] and the https://github.com/spring-projects/spring-data-commons/wiki#release-notes[release notes] for "`new and noteworthy`" features.
* Ask a question - we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/tags/spring-data[`spring-data`].
* Report bugs with Spring Data Commons at https://github.com/spring-projects/spring-data-commons/issues[github.com/spring-projects/spring-data-commons/issues].

== 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
https://github.com/spring-projects/spring-data-commons/issues[issue tracker] to see if someone has already reported the problem.
* If the issue doesn’t already exist, https://github.com/spring-projects/spring-data-commons/issues/new[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 and JVM version.
* If you need to paste code, or include a stack trace use Markdown +++```+++ escapes before and after your text.
* 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 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/apache/maven-wrapper[maven wrapper].
You also need JDK 17 or above.

[source,bash]
----
 $ ./mvnw clean install
----

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].

_Also see link:CONTRIBUTING.adoc[CONTRIBUTING.adoc] if you wish to submit pull requests._
All commits must include a __Signed-off-by__ trailer at the end of each commit message to indicate that the contributor agrees to the Developer Certificate of Origin.
For additional details, please refer to the blog post https://spring.io/blog/2025/01/06/hello-dco-goodbye-cla-simplifying-contributions-to-spring[Hello DCO, Goodbye CLA: Simplifying Contributions to Spring].

=== Building reference documentation

Building the documentation builds also the project without running tests.

[source,bash]
----
 $ ./mvnw clean install -Pantora
----

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

== License

Spring Data Commons is Open Source software released under the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].
