# Redisson - Redis Java client<br/>with features of an in-memory data grid
[](https://maven-badges.herokuapp.com/maven-central/org.redisson/redisson)
[](http://www.javadoc.io/doc/org.redisson/redisson)
[](http://www.apache.org/licenses/LICENSE-2.0.html)
[Quick start ](https://github.com/redisson/redisson#quick-start ) | [Documentation ](https://github.com/redisson/redisson/wiki/Table-of-Content ) | [Changelog ](https://github.com/redisson/redisson/blob/master/CHANGELOG.md ) | [Code examples ](https://github.com/redisson/redisson-examples ) | [FAQs ](https://github.com/redisson/redisson/wiki/16.-FAQ ) | [Report an issue ](https://github.com/redisson/redisson/issues/new )
Based on high-performance async and lock-free Java Redis client and [Netty ](http://netty.io ) framework.
Supported JDK: 1.8 ... 20 and Android
Supported Redis: 3.0 ... 7.0
## Features
* Thread-safe implementation
* Supports [Redis Replicated ](https://github.com/redisson/redisson/wiki/2.-Configuration/#25-replicated-mode ), [Redis Cluster ](https://github.com/redisson/redisson/wiki/2.-Configuration/#24-cluster-mode ), [Redis Sentinel ](https://github.com/redisson/redisson/wiki/2.-Configuration/#27-sentinel-mode ), [Redis Master and Slaves ](https://github.com/redisson/redisson/wiki/2.-Configuration/#28-master-slave-mode ), [Redis Single ](https://github.com/redisson/redisson/wiki/2.-Configuration/#26-single-instance-mode ) setup
* Amazon Web Services compatible
* [AWS Redis Global Datastore ](https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Redis-Global-Datastore.html )
* [AWS ElastiCache ](https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/WhatIs.html )
* [Amazon MemoryDB ](https://aws.amazon.com/memorydb )
* Microsoft Azure compatible
* [Azure Redis Cache ](https://azure.microsoft.com/en-us/services/cache/ )
* [Azure Redis Cache active-passive replication ](https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-how-to-geo-replication )
* [Azure Redis Cache active-active replication ](https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-how-to-active-geo-replication )
* Google Cloud Memorystore compatible
* [Google Cloud Redis ](https://cloud.google.com/memorystore/docs/redis/ )
* [Google Cloud Redis High availability ](https://cloud.google.com/memorystore/docs/redis/high-availability )
* Redis Enterprise compatible
* [Redis Enterprise ](https://redis.com/redis-enterprise/ )
* [Redis Enterprise Active-Active databases ](https://docs.redis.com/latest/rs/databases/active-active/get-started/ )
* [Redis Enterprise Multiple Active Proxy ](https://docs.redis.com/latest/rs/databases/configure/proxy-policy/#about-multiple-active-proxy-support )
* Aiven compatible
* [Aiven for Redis ](https://aiven.io/redis )
* IBM Cloud compatible
* [IBM Cloud Databases for Redis ](https://www.ibm.com/cloud/databases-for-redis )
* Supports auto-reconnection
* Supports failed to send command auto-retry
* Supports OSGi
* Supports SSL
* Asynchronous connection pool
* Lua scripting
* [JSON datatype ](https://github.com/redisson/redisson/wiki/6.-distributed-objects/#615-json-object-holder )
* [Reactive Streams ](https://github.com/redisson/redisson/wiki/3.-operations-execution#32-reactive-way ) API
* [RxJava3 ](https://github.com/redisson/redisson/wiki/3.-operations-execution#32-reactive-way ) API
* [Asynchronous ](https://github.com/redisson/redisson/wiki/3.-operations-execution#31-async-way ) API
* Local cache support including [Caffeine ](https://github.com/ben-manes/caffeine )-based implementation
* [Distributed Java objects ](https://github.com/redisson/redisson/wiki/6.-Distributed-objects )
Object holder, Binary stream holder, Geospatial holder, BitSet, AtomicLong, AtomicDouble, PublishSubscribe,
Bloom filter, HyperLogLog
* [Distributed Java collections ](https://github.com/redisson/redisson/wiki/7.-Distributed-collections )
Map, Multimap, Set, List, SortedSet, ScoredSortedSet, LexSortedSet, Queue, Deque, Blocking Queue, Bounded Blocking Queue, Blocking Deque, Delayed Queue, Priority Queue, Priority Deque
* [Distributed Java locks and synchronizers ](https://github.com/redisson/redisson/wiki/8.-Distributed-locks-and-synchronizers )
Lock, FairLock, MultiLock, RedLock, ReadWriteLock, Semaphore, PermitExpirableSemaphore, CountDownLatch
* [Distributed services ](https://github.com/redisson/redisson/wiki/9.-distributed-services )
Remote service, Live Object service, Executor service, Scheduler service, MapReduce service
* [Helidon ](https://github.com/redisson/redisson/tree/master/redisson-helidon ) integration
* [Micronaut ](https://github.com/redisson/redisson/tree/master/redisson-micronaut ) integration
* [Quarkus ](https://github.com/redisson/redisson/tree/master/redisson-quarkus ) integration
* [Spring Cache ](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#142-spring-cache ) implementation
* [Spring Transaction API ](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#148-spring-transaction-manager ) implementation
* [Spring Data Redis ](https://github.com/redisson/redisson/tree/master/redisson-spring-data ) integration
* [Spring Boot Starter ](https://github.com/redisson/redisson/tree/master/redisson-spring-boot-starter ) implementation
* [Hibernate Cache ](https://github.com/redisson/redisson/tree/master/redisson-hibernate ) implementation
* [MyBatis Cache ](https://github.com/redisson/redisson/tree/master/redisson-mybatis ) implementation
* [Transactions API ](https://github.com/redisson/redisson/wiki/10.-Additional-features#104-transactions )
* [JCache API (JSR-107) ](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#144-jcache-api-jsr-107-implementation ) implementation
* [Tomcat Session Manager ](https://github.com/redisson/redisson/tree/master/redisson-tomcat ) implementation
* [Spring Session ](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#147-spring-session ) implementation
* [Redis pipelining ](https://github.com/redisson/redisson/wiki/10.-additional-features#103-execution-batches-of-commands ) (command batches)
* Supports many popular codecs ([JBoss Marshalling](https://github.com/jboss-remoting/jboss-marshalling), [Jackson JSON ](https://github.com/FasterXML/jackson ), [Avro ](http://avro.apache.org/ ), [Smile ](http://wiki.fasterxml.com/SmileFormatSpec ), [CBOR ](http://cbor.io/ ), [MsgPack ](http://msgpack.org/ ), [Kryo ](https://github.com/EsotericSoftware/kryo ), [Amazon Ion ](https://amzn.github.io/ion-docs/ ), [LZ4 ](https://github.com/jpountz/lz4-java ), [Snappy ](https://github.com/xerial/snappy-java ) and JDK Serialization)
* Over 1800 unit tests
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## Success stories
## [Moving from Hazelcast to Redis / Datorama](https://engineering.datorama.com/moving-from-hazelcast-to-redis-b90a0769d1cb)
## [Migrating from Hazelcast to Redis / Halodoc](https://blogs.halodoc.io/why-and-how-we-move-from-hazelcast-to-redis-2/)
## [Distributed Locking with Redis (Migration from Hazelcast) / ContaAzul](https://carlosbecker.com/posts/distributed-locks-redis/)
## [Migrating from Coherence to Redis](https://www.youtube.com/watch?v=JF5R2ucKTEg)
## Quick start
#### Maven
< dependency >
< groupId > org.redisson< / groupId >
< artifactId > redisson< / artifactId >
< version > 3.20.1< / version >
< / dependency >
#### Gradle
compile 'org.redisson:redisson:3.20.1'
#### SBT
libraryDependencies += "org.redisson" % "redisson" % "3.20.1"
#### Java
```java
// 1. Create config object
Config config = new Config();
config.useClusterServers()
// use "rediss://" for SSL connection
.addNodeAddress("redis://127.0.0.1:7181");
// or read config from file
config = Config.fromYAML(new File("config-file.yaml"));
```
```java
// 2. Create Redisson instance
// Sync and Async API
RedissonClient redisson = Redisson.create(config);
// Reactive API
RedissonReactiveClient redissonReactive = redisson.reactive();
// RxJava3 API
RedissonRxClient redissonRx = redisson.rxJava();
```
```java
// 3. Get Redis based implementation of java.util.concurrent.ConcurrentMap
RMap< MyKey , MyValue > map = redisson.getMap("myMap");
RMapReactive< MyKey , MyValue > mapReactive = redissonReactive.getMap("myMap");
RMapRx< MyKey , MyValue > mapRx = redissonRx.getMap("myMap");
```
```java
// 4. Get Redis based implementation of java.util.concurrent.locks.Lock
RLock lock = redisson.getLock("myLock");
RLockReactive lockReactive = redissonReactive.getLock("myLock");
RLockRx lockRx = redissonRx.getLock("myLock");
```
```java
// 4. Get Redis based implementation of java.util.concurrent.ExecutorService
RExecutorService executor = redisson.getExecutorService("myExecutorService");
// over 50 Redis based Java objects and services ...
```
Try __ [Redisson PRO ](https://redisson.pro )__ with **ultra-fast performance** and **support by SLA** .
## Downloads
[Redisson 3.20.1 ](https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=org.redisson&a=redisson&v=3.20.1&e=jar ),
[Redisson node 3.20.1 ](https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=org.redisson&a=redisson-all&v=3.20.1&e=jar )
## FAQs
[Q: What is the cause of RedisTimeoutException? ](https://github.com/redisson/redisson/wiki/16.-FAQ#q-what-is-the-cause-of-redistimeoutexception )
[Q: When do I need to shut down a Redisson instance, at the end of each request or the end of the life of a thread? ](https://github.com/redisson/redisson/wiki/16.-FAQ#q-when-do-i-need-to-shut-down-a-redisson-instance-at-the-end-of-each-request-or-the-end-of-the-life-of-a-thread )
[Q: In MapCache/SetCache/SpringCache/JCache, I have set an expiry time to an entry, why is it still in Redis when it should be disappeared? ](https://github.com/redisson/redisson/wiki/16.-FAQ#q-in-mapcachesetcachespringcachejcache-i-have-set-an-expiry-time-to-an-entry-why-is-it-still-in-redis-when-it-should-be-disappeared )
[Q: How can I perform Pipelining/Transaction through Redisson? ](https://github.com/redisson/redisson/wiki/16.-FAQ#q-how-can-i-perform-pipeliningtransaction-through-redisson )
[Q: Is Redisson thread safe? Can I share an instance of it between different threads? ](https://github.com/redisson/redisson/wiki/16.-FAQ#q-is-redisson-thread-safe-can-i-share-an-instance-of-it-between-different-threads )
[Q: Can I use different encoder/decoders for different tasks? ](https://github.com/redisson/redisson/wiki/16.-FAQ#q-can-i-use-different-encoderdecoders-for-different-tasks )
