Spring整合redis，通过sentinel进行主从切换
实现功能描述：
redis服务器进行Master-slaver-slaver-....主从配置，通过2台sentinel进行failOver故障转移，自动切换，采用该代码完全可以直接用于实际生产环境。
题外话：
一般来说这样的部署足以支持数以百万级的用户，但如果数量实在是太高，此时redis的Master-Slaver主从不一定能够满足，因此进行redis的分片。
本文不讲解redis的分片，但如果你使用了，需要注意的按照另一篇文章的介绍：Sentinel&Jedis看上去是个完美的解决方案，这句话只说对了一半，
在无分片的情况是这样，但我们的应用使用了数据分片-sharing，数据被平均分布到4个不同的实例上，每个实例以主从结构部署，Jedis没有提供
基于Sentinel的ShardedJedisPool，也就是说在4个分片中，如果其中一个分片发生主从切换，应用所使用的ShardedJedisPool无法获得通知，所有
对那个分片的操作将会失败。文章中提出了解决方案,请参考《基于Redis Sentinel的Redis集群(主从&Sharding)高可用方案》
该代码模拟多线程向redis中set/get。
1、maven依赖配置
- <dependency>
- <groupId>org.springframework.datagroupId>
- <artifactId>spring-data-redisartifactId>
- <version>1.4.1.RELEASEversion>
- dependency>
- <dependency>
- <groupId>redis.clientsgroupId>
- <artifactId>jedisartifactId>
- <version>2.6.2version>
- dependency>
- <dependency>
- <groupId>org.apache.commonsgroupId>
- <artifactId>commons-lang3artifactId>
- <version>3.3.2version>
- dependency>
2、redis.properties
- # Redis settings
- #sentinel1的IP和端口
- im.hs.server.redis.sentinel1.host=192.168.62.154
- im.hs.server.redis.sentinel1.port=26379
- #sentinel2的IP和端口
- im.hs.server.redis.sentinel2.host=192.168.62.153
- im.hs.server.redis.sentinel2.port=26379
- #sentinel的鉴权密码
- im.hs.server.redis.sentinel.masterName=155Master
- im.hs.server.redis.sentinel.password=hezhixiong
- #最大闲置连接数
- im.hs.server.redis.maxIdle=500
- #最大连接数，超过此连接时操作redis会报错
- im.hs.server.redis.maxTotal=5000
- im.hs.server.redis.maxWaitTime=1000
- im.hs.server.redis.testOnBorrow=true
- #最小闲置连接数，spring启动的时候自动建立该数目的连接供应用程序使用，不够的时候会申请。
- im.hs.server.redis.minIdle=300
3、spring-redis.xml
- xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
- xmlns:context="http://www.springframework.org/schema/context"
- xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
- xmlns:aop="http://www.springframework.org/schema/aop"
- xsi:schemaLocation="
- http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
- http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
- <context:component-scan base-package="com.gaojiasoft.test.redis" />
- <context:property-placeholder location="classpath:conf/redis/redis.properties" />
- <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
- <property name="maxTotal" value="${im.hs.server.redis.maxTotal}" />
- <property name="minIdle" value="${im.hs.server.redis.minIdle}" />
- <property name="maxWaitMillis" value="${im.hs.server.redis.maxWaitTime}" />
- <property name="maxIdle" value="${im.hs.server.redis.maxIdle}" />
- <property name="testOnBorrow" value="${im.hs.server.redis.testOnBorrow}" />
- <property name="testOnReturn" value="true" />
- <property name="testWhileIdle" value="true" />
- bean>
- <bean id="sentinelConfiguration"
- class="org.springframework.data.redis.connection.RedisSentinelConfiguration">
- <property name="master">
- <bean class="org.springframework.data.redis.connection.RedisNode">
- <property name="name" value="${im.hs.server.redis.sentinel.masterName}">property>
- bean>
- property>
- <property name="sentinels">
- <set>
- <bean class="org.springframework.data.redis.connection.RedisNode">
- <constructor-arg name="host"
- value="${im.hs.server.redis.sentinel1.host}">constructor-arg>
- <constructor-arg name="port"
- value="${im.hs.server.redis.sentinel1.port}">constructor-arg>
- bean>
- <bean class="org.springframework.data.redis.connection.RedisNode">
- <constructor-arg name="host"
- value="${im.hs.server.redis.sentinel2.host}">constructor-arg>
- <constructor-arg name="port"
- value="${im.hs.server.redis.sentinel2.port}">constructor-arg>
- bean>
- set>
- property>
- bean>
- <bean id="connectionFactory"
- class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:password="${im.hs.server.redis.sentinel.password}">
- <constructor-arg name="sentinelConfig" ref="sentinelConfiguration">constructor-arg>
- <constructor-arg name="poolConfig" ref="poolConfig">constructor-arg>
- bean>
- <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
- <property name="connectionFactory" ref="connectionFactory" />
- bean>
- beans><strong>
- strong>
4、RedisServiceImpl.Java
- package com.gaojiasoft.test.redis;
- import java.util.concurrent.LinkedBlockingQueue;
- import java.util.concurrent.ThreadPoolExecutor;
- import java.util.concurrent.TimeUnit;
- import org.apache.commons.lang3.concurrent.BasicThreadFactory;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.dao.DataAccessException;
- import org.springframework.data.redis.connection.RedisConnection;
- import org.springframework.data.redis.core.RedisCallback;
- import org.springframework.data.redis.core.RedisTemplate;
- import org.springframework.stereotype.Service;
- @Service("redisService")
- public class RedisServiceImpl {
- private Logger logger = LoggerFactory.getLogger("RedisServiceImpl");
- @Autowired
- RedisTemplate redisTemplate;
- // 线程池
- private static final ThreadPoolExecutor executor = new ThreadPoolExecutor(
- 256, 256, 30L, TimeUnit.SECONDS,
- new LinkedBlockingQueue
(), - new BasicThreadFactory.Builder().daemon(true)
- .namingPattern("redis-oper-%d").build(),
- new ThreadPoolExecutor.CallerRunsPolicy());
- public void set(final String key, final String value) {
- redisTemplate.execute(new RedisCallback
- @Override
- public Object doInRedis(RedisConnection connection)
- throws DataAccessException {
- connection.set(
- redisTemplate.getStringSerializer().serialize(key),
- redisTemplate.getStringSerializer().serialize(value));
- logger.debug("save key:" + key + ",value:" + value);
- return null;
- }
- });
- }
- public String get(final String key) {
- return redisTemplate.execute(new RedisCallback
() { - @Override
- public String doInRedis(RedisConnection connection)
- throws DataAccessException {
- byte[] byteKye = redisTemplate.getStringSerializer().serialize(
- key);
- if (connection.exists(byteKye)) {
- byte[] byteValue = connection.get(byteKye);
- String value = redisTemplate.getStringSerializer()
- .deserialize(byteValue);
- logger.debug("get key:" + key + ",value:" + value);
- return value;
- }
- logger.error("valus does not exist!,key:"+key);
- return null;
- }
- });
- }
- public void delete(final String key) {
- redisTemplate.execute(new RedisCallback
- public Object doInRedis(RedisConnection connection) {
- connection.del(redisTemplate.getStringSerializer().serialize(
- key));
- return null;
- }
- });
- }
- /**
- * 线程池并发操作redis
- *
- * @param keyvalue
- */
- public void mulitThreadSaveAndFind(final String keyvalue) {
- executor.execute(new Runnable() {
- @Override
- public void run() {
- try {
- set(keyvalue, keyvalue);
- get(keyvalue);
- } catch (Throwable th) {
- // 防御性容错，避免高并发下的一些问题
- logger.error("", th);
- }
- }
- });
- }
- }
5、RedisTest.java (Junit测试用例)
- package com.gaojiasoft.test.redis;
- import org.junit.Test;
- import org.springframework.context.ConfigurableApplicationContext;
- import org.springframework.context.support.ClassPathXmlApplicationContext;
- public class RedisTest {
- private static ConfigurableApplicationContext context;
- RedisServiceImpl service;
- @Test
- public void testSave() throws InterruptedException {
- context = new ClassPathXmlApplicationContext(
- "classpath:conf/redis/spring-redis.xml");
- service = (RedisServiceImpl) context.getBean("redisService");
- int i = 1;
- while (true) {
- Thread.sleep(1);
- try {
- service.mulitThreadSaveAndFind("" + i);
- } catch (Exception e) {
- e.printStackTrace();
- }
- i++;
- }
- }
- }