Redis资料汇总(十) java client

redis主页上列出的java 客户端有JDBC-Redis JRedis Jedis三种,下面分别介绍三种客户端的优缺点及其他相关的工具.

	支持redis版本	性能	维护	推荐
JDBC-Redis		not good
JRedis	1.2.n release 2.0.0 尚未release版本	fast
Jedis	2.0.0 release	fast	actively developed	推荐

JDBC-Redis

JDBC-Redis is just a JDBC wrapper for JRedis database.
If you plan on using your code with different back-ends then JDBC is a good way to go. NOTE: It is not a complete JDBC implementation and the NOSQL will bleed through.

If you are going to stay with Redis then I would suggest using the API, which will give you more flexibility. Use a DAO layer pattern to encapsulate your DB Access and down the road that is all you will need to change.

- Romain Hippeau

Redis syntax is completely different from standard SQL so using JDBC doesn't help encapsulating different back-ends as you suggest: I would have to write new queries anyway... – muriloq Jun 16 '10 at 14:00

@muriloq - but the mechanical acquiring and releasing resources is standard. – Romain Hippeau

spring wrapper

Spring provides a wrapper around both implementations(Jredis Jedis) and they're providing serialization/deserialization, amongst other things: 

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Person p = new Person("Joe", "Trader", 33); template.convertAndSet("trader:1", p); Person samePerson = template.getAndConvert("trader:1", Person.class); Assert.assertEquals(p, samePerson);

上面的方法可能已经调整,请参见最新的 http://static.springsource.org/spring-data/data-keyvalue/docs/1.0.0.M2/reference/html/#redis

放弃spring wrapper

项目中本来打算使用spring wrapperbean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">

  <property name="maxActive" value="20"/> 

  <property name="maxIdle" value="10"/> 

  <property name="maxWait" value="1000"/>

</bean>

<!-- jedis shard信息配置 -->

<bean id="jedis.shardInfo" class="redis.clients.jedis.JedisShardInfo">

  <constructor-arg index="0" value="*.*.*.*"/> 

  <constructor-arg index="1" value="6379"/>

</bean>

<!-- jedis shard pool配置 -->

<bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool">

  <constructor-arg index="0" ref="jedisPoolConfig"/> 

  <constructor-arg index="1">

    <list>

      <ref bean="jedis.shardInfo"/>

    </list>

  </constructor-arg>

</bean>

<bean id="jedisCommands" factory-bean="shardedJedisPool" factory-method="getResource"/>

上面的这种配法在spring初始化时获取一次实例化jedisCommands，而后每次的redis的调用时并未从pool中获取，解决方案：

设置

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<!-- POOL配置 --> <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">   <property name="maxActive"  value="20" />   <property name="maxIdle" value="10" />   <property name="maxWait" value="1000" />   <property name="testOnBorrow"  value="true"/> </bean>   <!-- jedis shard信息配置 --> <bean id="jedis.shardInfo" class="redis.clients.jedis.JedisShardInfo">   <constructor-arg index="0" value="*.*.*.*" />   <constructor-arg index="1" value="6379" /> </bean>   <!-- jedis shard pool配置 --> <bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool">   <constructor-arg index="0" ref="jedisPoolConfig" />   <constructor-arg index="1">     <list>       <ref bean="jedis.shardInfo" />     </list>   </constructor-arg> </bean>

参考:
http://stackoverflow.com/questions/3047010/best-redis-library-for-java
https://github.com/xetorthio/johm

https://github.com/xetorthio/jedis/issues/closed#issue/76