# Redisson - Redis Java client<br/>with features of an in-memory data grid
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[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 ... 19 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
* Supports [AWS ElastiCache](https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/WhatIs.html), [Amazon MemoryDB](https://aws.amazon.com/memorydb), [Azure Redis Cache](https://azure.microsoft.com/en-us/services/cache/), [Google Cloud Memorystore for Redis](https://cloud.google.com/memorystore/docs/redis/), [Redis&nbsp;Enterprise](https://redis.com/redis-enterprise/), [Aiven for Redis](https://aiven.io/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>3.19.1</version>
    </dependency>  

#### Gradle
    compile 'org.redisson:redisson:3.19.1'  

#### SBT
    libraryDependencies += "org.redisson" % "redisson" % "3.19.1"

#### 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 3.19.1](https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=org.redisson&a=redisson&v=3.19.1&e=jar),
[Redisson node 3.19.1](https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=org.redisson&a=redisson-all&v=3.19.1&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)