搭建redis集群实现分布式缓存（三）

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上面两篇介绍了redis集群的配置合一些基本的概念，所以接下来当然是要在项目中使用咯，redis的java支持已经做的非常好了，所以我们来试着使用这些api来进行redis的操作，首先我们需要操作redis的架包：

    <dependency>        <groupId>redis.clients</groupId>        <artifactId>jedis</artifactId>        <version>2.7.3</version>    </dependency>

我们需要做的仅仅是在spring配置文件中注入这些基本类，然后自己实现dao，下面是配置文件：

<context:property-placeholder ignore-unresolvable="true" location="classpath:yonyou.properties" />        <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">        <property name="maxTotal" value="1000"/>         <property name="maxIdle" value="10"/>         <property name="minIdle" value="1"/>        <property name="maxWaitMillis" value="30000"/>         <property name="testOnBorrow" value="true"/>         <property name="testOnReturn" value="true"/>         <property name="testWhileIdle" value="true"/>        <!-- <property name="testWhileIdle" value="true"/> -->    </bean>           <bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool" destroy-method="destroy">        <constructor-arg ref="jedisPoolConfig"/>         <constructor-arg>　　　　　　<!--如果以后需要扩展集群，只需要复制一份redis,修改端口，然后在这里配置即可-->            <list>             <bean class="redis.clients.jedis.JedisShardInfo">                 <constructor-arg index="0" value="127.0.0.1"/>                <constructor-arg index="1" value="6379"/>                <constructor-arg index="2" value="instance:01"/>            </bean>            <bean class="redis.clients.jedis.JedisShardInfo">                <constructor-arg index="0" value="127.0.0.1"/>                <constructor-arg index="1" value="6380"/>                <constructor-arg index="2" value="instance:02"/>            </bean>             <bean class="redis.clients.jedis.JedisShardInfo">                <constructor-arg index="0" value="127.0.0.1"/>                <constructor-arg index="1" value="6381"/>                <constructor-arg index="2" value="instance:03"/>            </bean>            </list>        </constructor-arg>        </bean>     <!--java帮我们同步sentinel的信息，将主从信息同步到客户端来-->   <bean class="redis.clients.jedis.JedisSentinelPool">        <constructor-arg index="0" value="mymaster"/>        <constructor-arg index="1">            <set>                <value>127.0.0.1:26379</value>            </set>        </constructor-arg>        <constructor-arg index="2" ref="jedisPoolConfig"/>    </bean>

上面配置好了以后，我们就相当于将redis集群给映射过来了，下来我们只需要做一些操作，涉及到数据的CRUD.

package com.yonyou.hotusm.module.nosql.redis;import redis.clients.jedis.ShardedJedis;//这个接口是操作sharedJedispublic interface RedisDataSource {        public abstract ShardedJedis getRedisClient();    public void returnResource(ShardedJedis shardedJedis);    public void returnResource(ShardedJedis shardedJedis,boolean broken);}

实现：

package com.yonyou.hotusm.module.nosql.redis;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import redis.clients.jedis.ShardedJedis;import redis.clients.jedis.ShardedJedisPool;@Repository("redisDataSource")public class RedisDataSourceImpl implements RedisDataSource {    private static final Logger log = LoggerFactory.getLogger(RedisDataSourceImpl.class);    @Autowired    private ShardedJedisPool    shardedJedisPool;    public ShardedJedis getRedisClient() {        try {            ShardedJedis shardJedis = shardedJedisPool.getResource();            return shardJedis;        } catch (Exception e) {            log.error("getRedisClent error", e);        }        return null;    }    public void returnResource(ShardedJedis shardedJedis) {        shardedJedisPool.close();        //shardedJedisPool.returnResource(shardedJedis);    }    public void returnResource(ShardedJedis shardedJedis, boolean broken) {        if (broken) {            shardedJedisPool.close();            //shardedJedisPool.returnBrokenResource(shardedJedis);        } else {            shardedJedisPool.close();            //shardedJedisPool.returnResource(shardedJedis);        }    }}

下面就是操作jedis的具体类了：

@Repository("jedisTemplate")public class JedisTemplate {    private static final Logger log = LoggerFactory.getLogger(JedisTemplate.class);    @Autowired    private RedisDataSource     redisDataSource;    public void disconnect() {        ShardedJedis shardedJedis = redisDataSource.getRedisClient();        shardedJedis.disconnect();    }    /**     * 设置单个值     *      * @param key     * @param value     * @return     */    public String set(String key, String value) {        String result = null;        ShardedJedis shardedJedis = redisDataSource.getRedisClient();        if (shardedJedis == null) {            return result;        }        boolean broken = false;        try {            result = shardedJedis.set(key, value);        } catch (Exception e) {            e.printStackTrace();            log.error(e.getMessage(), e);            broken = true;        } finally {            redisDataSource.returnResource(shardedJedis, broken);        }        return result;    }    /**     * 获取单个值     *      * @param key     * @return     */    public String get(String key) {        String result = null;        ShardedJedis shardedJedis = redisDataSource.getRedisClient();        if (shardedJedis == null) {            return result;        }        boolean broken = false;        try {            result = shardedJedis.get(key);        } catch (Exception e) {            log.error(e.getMessage(), e);            broken = true;        } finally {            redisDataSource.returnResource(shardedJedis, broken);        }        return result;    }

真正的还有很多操作，list，set，哈希什么的，我就不把代码贴出来了，看看api就知道了

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