spring-data-redis/README.adoc

= Spring Data Redis image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-redis%2Fmain&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-redis/] 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 Redis"]

The primary goal of the https://spring.io/projects/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.

This module provides integration with the https://redis.io/[Redis] store.
It is also tested to work with https://valkey.io/[Valkey] on a best-effort basis as long as Valkey remains largely compatible with Redis.

== Features

* Connection package as low-level abstraction across multiple Redis drivers (https://github.com/lettuce-io/lettuce-core[Lettuce] and https://github.com/redis/jedis[Jedis]).
* Exception translation to Spring’s portable Data Access exception hierarchy for Redis driver exceptions
* https://docs.spring.io/spring-data/redis/reference/redis/template.html[`RedisTemplate`] that provides a high level abstraction for performing various Redis operations, exception translation and serialization support.
* Pubsub support (such as a MessageListenerContainer for message-driven POJOs).
* https://docs.spring.io/spring-data/redis/reference/redis/connection-modes.html#redis:sentinel[Redis Sentinel] and https://docs.spring.io/spring-data/redis/reference/redis/connection-modes.html#cluster.enable[Redis Cluster] support.
* Reactive API using the Lettuce driver.
* JDK, String, JSON and Spring Object/XML mapping serializers.
* JDK Collection implementations on top of Redis.
* Atomic counter support classes.
* Sorting and Pipelining functionality.
* Dedicated support for SORT, SORT/GET pattern and returned bulk values.
* Redis implementation for Spring 3.1 cache abstraction.
* Automatic implementation of `Repository` interfaces including support for custom finder methods using `@EnableRedisRepositories`.
* CDI support for repositories.

== 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

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

[source,java]
----
public class Example {

    // inject the actual template
    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    // inject the template as ListOperations
    // can also inject as Value, Set, ZSet, and HashOperations
    @Resource(name="redisTemplate")
    private ListOperations<String, String> listOps;

    public void addLink(String userId, URL url) {
        listOps.leftPush(userId, url.toExternalForm());
        // or use template directly
        redisTemplate.boundListOps(userId).leftPush(url.toExternalForm());
    }
}

@Configuration
class ApplicationConfig {

  @Bean
  public RedisConnectionFactory redisConnectionFactory() {
    return new LettuceConnectionFactory();
  }
}
----

=== Maven configuration

Add the Maven dependency:

[source,xml]
----
<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-redis</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-redis</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/redis/reference/[reference documentation], and https://docs.spring.io/spring-data/redis/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/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-redis`].
* Report bugs with Spring Data Redis at https://github.com/spring-projects/spring-data-redis/issues/new[github.com/spring-projects/spring-data-redis].

== 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-redis/issues[issue tracker] to see if someone has already reported the problem.
* If the issue does not already exist, https://github.com/spring-projects/spring-data-redis/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, the JVM version, Stacktrace, etc.
* If you need to paste code, or include a stack trace use https://guides.github.com/features/mastering-markdown/[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 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].
You also need JDK 17 or above and `make`.
The local build environment is managed within a `Makefile` to download, build and spin up Redis in various configurations (Standalone, Sentinel, Cluster, etc.)

[source,bash]
----
 $ make test
----

The preceding command runs a full build.
You can use `make start`, `make stop`, and `make clean` commands to control the environment yourself.
This is useful if you want to avoid constant server restarts.
Once all Redis instances have been started, you can either run tests in your IDE or the full Maven build:

[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 v3.8.0 or above].

_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._

=== 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/antora/site/index.html`.

== Guides

The https://spring.io/[spring.io] site contains several guides that show how to use Spring Data step-by-step:

* https://spring.io/guides/gs/messaging-redis/[Messaging with Redis]: Learn how to use Redis as a message broker.
* https://spring.io/guides/gs/spring-data-reactive-redis/[Accessing Data Reactively with Redis]: Learn how to reactively interface with Redis and Spring Data.

== Examples

* https://github.com/spring-projects/spring-data-examples/[Spring Data Examples] contains example projects that explain specific features in more detail.

== License

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