Redis - Redisson vs Jedis

阿羅發布于2019-08-15 14:03 / 1125人閱讀

摘要：較底層，可塑性強，要自己實現。省的自己去實現輪子。總結另外有中文文檔。。。

Additional dependencies

Jedis requires Apache Commons Pool 2 for connection-pooling.

Redisson requires Netty, the JCache API and Project Reactor as basic dependencies.

Programming model

Jedis is a low-level driver exposing Redis API as Java method calls:

Jedis jedis = …;

jedis.set("key", "value");

List values = jedis.mget("key", "key2", "key3");

Redisson is a high-level client, each call invokes one or more Redis calls, some of them are implemented with Lua (Redis "Scripting").

Redisson redisson = …

RMap map = redisson.getMap("my-map"); // implement java.util.Map

map.put("key", "value");

map.containsKey("key");

map.get("key");

Scalability

Jedis uses blocking I/O and method calls are synchronous. Your program flow is required to wait until I/O is handled by the sockets. There"s no asynchronous (Future, CompletableFuture) or reactive support (Reactive Streams Publisher). Jedis client instances are not thread-safe hence they require connection-pooling (Jedis-instance per calling thread).

Redisson uses non-blocking I/O and an event-driven communication layer with netty. Connections are pooled, but the API itself is thread-safe and requires fewer resources. you can even operate on a single connection. That"s the most efficient way when working with Redis.

Client implementation

Jedis gives you full control over the commands you invoke and the resulting behavior. 較底層，可塑性強，high-level features要自己實現。

Using Redissons high-level features means that you can use objects without the need of knowing they are backed by Redis (Map, List, Set, …)。省的自己去實現輪子。

總結：Redisson supports all the things Jedis supports and provides read strategies for Master/Slave setups, has improved support for AWS ElastiCache. 另外有中文文檔。。。

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