Feature Comparison: Redisson vs Lettuce

When it comes to the battle of third-party Redis Java clients, which one reigns supreme: Redisson or Lettuce?

Redisson is a Redis Java client that includes many common implementations of distributed Java collections, objects, and services. As a result, Redisson dramatically lowers the Redis learning curve for Java developers, making it easier than ever to build key-value Redis databases.

Lettuce describes itself as "a scalable Redis client for building non-blocking Reactive applications." The Lettuce project includes both synchronous and asynchronous support for the Redis API, including Java data structures, the publish/subscribe pattern, and high availability and scalability.

Both Redisson and Lettuce are competitive options for using Java with Redis. In this article, we'll discuss exactly how the two alternatives stack up against each other in a Redisson vs. Lettuce feature comparison.

Distributed collections
Redisson Lettuce
Map plain commands only
Set plain commands only
List plain commands only
Queue plain commands only
Deque plain commands only
ScoredSortedSet plain commands only
Stream plain commands only

When it comes to Java distributed collections, Redisson has a much more ample feature set. Lettuce supports the following collections for plain commands only:

  • Map
  • Set
  • List
  • Queue
  • Deque
  • ScoredSortedSet
  • Stream

Redisson includes support for all of the above collections, as well as many more:

  • Multimap
  • SortedSet
  • PriorityQueue
  • PriorityDeque
  • DelayedQueue
  • RingBuffer
  • TransferQueue
Distributed locks and synchronizers
Redisson Lettuce

Redisson is the clear winner with distributed locks and synchronizers. The Redisson feature set includes:

  • Lock
  • Semaphore
  • CountDownLatch
  • FairLock
  • MultiLock
  • ReadWriteLock

Lettuce, on the other hand, includes none of these implementations.

Distributed objects
Redisson Lettuce
Object holder plain commands only
AtomicLong plain commands only
Publish/Subscribe plain commands only
Reliable Publish/Subscribe
Id Generator
AtomicDouble plain commands only
Geospatial plain commands only
BitSet plain commands only
HyperLogLog plain commands only

Both Redisson and Lettuce have a good selection of Java distributed objects. The Lettuce offerings include:

  • Object holder
  • AtomicLong
  • Publish/Subscribe
  • AtomicDouble
  • Geospatial
  • BitSet
  • HyperLogLog

Note that all of these Lettuce implementations are for plain commands only.

Redisson, meanwhile, includes all of the objects above as well as:

  • BloomFilter
  • BinaryStream
  • RateLimiter
Advanced cache support
Redisson Lettuce
JCache API
JCache API with near cache
(up to 45x faster)
Near Cache
Read-through strategy support
Write-through strategy support
Write-behind strategy support

Redisson excels when it comes to caching, which can be a massive boost to database performance. The time and effort saved from caching data adds up in the long run, helping your applications run faster and retrieve information more quickly.

The caching features in Redisson include:

Advanced cache support in Lettuce, on the other hand, is scanty in comparison. Lettuce does not include support for caching in JCache or Spring.

Redisson Lettuce
Transactions API

Java transactions are a programming paradigm in which multiple commands are all executed as a single step, ensuring that they all either succeed or fail as a single unit. This is crucial for use cases such as financial transactions, in which a single operation (e.g. a money transfer) is actually performed by multiple commands under the hood.

If you need support for Java transactions, you'll have to use Redisson, which comes equipped with an API for that purpose. Lettuce, meanwhile, includes no such feature.

API architecture
Redisson Lettuce
Instance thread-safety
Asynchronous interface
Reactive stream interface
RxJava3 interface

Using programming models such as asynchronous, reactive, and RxJava3 is an excellent way to optimize your Java applications. Fortunately, both Redisson and Lettuce include full-fledged support for these three programming frameworks. (Lettuce specifically highlights its use for "building non-blocking Reactive applications.")

What's more, both Redisson and Lettuce have native support for thread-safety for instance variables. This helps reduce the likelihood of errors, crashes, and race conditions during program execution.

Distributed services
Redisson Lettuce
Integration with frameworks
Redisson Lettuce
Spring Boot
Spring Data
Spring Session
Spring Cache
Spring Cache with near cache
(up to 45x faster)
Hibernate Cache
Hibernate Cache with near cache
(up to 5x faster)
MyBatis Cache
MyBatis Cache with near cache
(up to 45x faster)
Tomcat Session Manager
Redisson Lettuce
SSL support
Custom data serialization
Redisson Lettuce
JSON codec
JDK Serialization
Avro codec
Smile codec
CBOR codec
MsgPack codec
Kryo codec
FST codec
LZ4 compression codec
Snappy compression codec
Stability and ease of use
Redisson Lettuce
Fully-managed services support
(AWS Elasticache, Azure Cache...)
Large memory amount handling

Stability and ease of use are two essential components of any enterprise-grade database. The good news is that both Redisson and Lettuce are capable of handling large amounts of memory.

However, only Redisson includes support for fully managed cloud services, such as Amazon ElastiCache and Azure Cache for Redis. Being able to take advantage of these fully managed services can significantly lower the learning curve for new users. Rather than managing your Redis deployment yourself, using Redisson allows you to pass off this task to the cloud provider, simplifying your IT environment.

Use Redis commands mapping table to find Redisson method for a particular Redis command.

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