SSM框架(二级缓存)集成Redis单机模式及哨兵模式

爱被打了一巴掌 2022-06-08 06:26 235阅读 0赞

项目整体框架： SpringMVC + Spring+MyBatis +Redis(缓存部署在Linux虚拟机)。

数据库：mysql

#### 1、整体架构 ####

*  参考Ehcache实现MyBatis二级缓存代码（Maven引用对应jar查阅）
 *  使用Spring管理Redis连接池
 *  模仿EhcacheCache，实现RedisCache

2、 pom.xml中加入Maven依赖

*      
        	
        	
        	<dependencies>
        		
        		<dependency>
        		    <groupId>org.mybatis</groupId>
        		    <artifactId>mybatis-ehcache</artifactId>
        		    <version>1.0.0</version>
        		</dependency>
        		
        		<dependency>
        		    <groupId>org.springframework.data</groupId>
        		    <artifactId>spring-data-redis</artifactId>
        		    <version>1.8.6.RELEASE</version>
        		</dependency>
        		<dependency>
        		    <groupId>org.apache.commons</groupId>
        		    <artifactId>commons-lang3</artifactId>
        		    <version>3.4</version>
        		</dependency>
        		<dependency>
        		    <groupId>redis.clients</groupId>
        		    <artifactId>jedis</artifactId>
        		    <version>2.9.0</version>
        		</dependency>
        		
        		
        		<dependency>
        		    <groupId>org.springframework.session</groupId>
        		    <artifactId>spring-session</artifactId>
        		    <version>1.3.1.RELEASE</version>
        		</dependency>
        
        
        		
        		
        		<dependency>
        			<groupId>com.github.pagehelper</groupId>
        			<artifactId>pagehelper</artifactId>
        			<version>5.0.0</version>
        		</dependency>
        
        		
        		
        		<dependency>
        			<groupId>org.mybatis.generator</groupId>
        			<artifactId>mybatis-generator-core</artifactId>
        			<version>1.3.5</version>
        		</dependency>
        
        
        		<dependency>
        			<groupId>org.springframework</groupId>
        			<artifactId>spring-webmvc</artifactId>
        			<version>4.3.7.RELEASE</version>
        		</dependency>
        
        		
        		
        		<dependency>
        			<groupId>com.fasterxml.jackson.core</groupId>
        			<artifactId>jackson-databind</artifactId>
        			<version>2.8.8</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>org.hibernate</groupId>
        			<artifactId>hibernate-validator</artifactId>
        			<version>5.4.1.Final</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>org.springframework</groupId>
        			<artifactId>spring-jdbc</artifactId>
        			<version>4.3.7.RELEASE</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>org.springframework</groupId>
        			<artifactId>spring-test</artifactId>
        			<version>4.3.7.RELEASE</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>org.springframework</groupId>
        			<artifactId>spring-aspects</artifactId>
        			<version>4.3.7.RELEASE</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>org.mybatis</groupId>
        			<artifactId>mybatis</artifactId>
        			<version>3.4.2</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>org.mybatis</groupId>
        			<artifactId>mybatis-spring</artifactId>
        			<version>1.3.1</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>c3p0</groupId>
        			<artifactId>c3p0</artifactId>
        			<version>0.9.1</version>
        		</dependency>
        		
        		<dependency>
        			<groupId>mysql</groupId>
        			<artifactId>mysql-connector-java</artifactId>
        			<version>5.1.41</version>
        		</dependency>
        		
        		
        		<dependency>
        			<groupId>jstl</groupId>
        			<artifactId>jstl</artifactId>
        			<version>1.2</version>
        		</dependency>
        
        		
        		<dependency>
        			<groupId>javax.servlet</groupId>
        			<artifactId>javax.servlet-api</artifactId>
        			<version>3.0.1</version>
        			<scope>provided</scope>
        		</dependency>
        		
        		
        		<dependency>
        		    <groupId>log4j</groupId>
        		    <artifactId>log4j</artifactId>
        		    <version>1.2.17</version>
        		</dependency>
        		  
              <dependency>  
                  <groupId>org.slf4j</groupId>  
                  <artifactId>slf4j-log4j12</artifactId>  
                  <version>1.7.13</version>  
              </dependency>  
        		
        		
        		<dependency>
        			<groupId>junit</groupId>
        			<artifactId>junit</artifactId>
        			<version>4.12</version>
        		</dependency>
        	</dependencies>
    
    3、Linux虚拟机Redis部署。
 *  3.1.下载解压redis(这里使用redis3.2.6的版本)：  
       
    
        cd /usr/software
        wget http://download.redis.io/releases/redis-3.2.6.tar.gz
        tar -zxvf /redis-3.2.6.tar.gz

3.2进行编译安装

cd redis-3.2.6
     make && make install

3.3进行节点创建，这里为了目录结构清晰，创建一个文件夹进行集群文件的统一存放，并复制配置文件到相应的三个文件夹中

cd /usr/software mkdir redis_cluster //创建集群目录 cd redis_cluster mkdir 6379 7001 7002 //分别代表三个节点 其对应端口 6379 6380 6381 cd .. //创建7000节点为例，拷贝到7000目录 cp /usr/software/redis-3.2.6/redis.conf ./redis_cluster/6379/ //拷贝到7001目录 cp /usr/software/redis-3.2.6/redis.conf ./redis_cluster/6380/ //拷贝到7002目录 cp /usr/software/redis-3.2.6/redis.conf ./redis_cluster/6381/

3.4.对应节点配置文件的修改以及sentinel.conf文件的创建配置

6379节点文件的修改：

redis.conf配置文件:

daemonize yes

pidfile "/var/run/redis6379.pid"

port 6379

bind 0.0.0.0

logfile "6379.log"

dbfilename "dump6379.rdb"

sentinel.conf的创建和配置:

port 26379

sentinel monitor mymaster192.168.108.128 6379

6380节点文件的修改：

redis.conf配置文件:

daemonize yes

pidfile "/var/run/redis6380.pid"

port6380

bind 0.0.0.0

logfile "6380.log"

dbfilename "dump6380.rdb"

slaveof 192.168.108.128 6380(映射到主服务器上)

sentinel.conf的创建和配置:

port 26380

sentinel monitor mymaster(主机名) 192.168.108.128 6380

6381节点文件的修改：

redis.conf配置文件:

daemonize yes

pidfile "/var/run/redis6381.pid"

port6381

bind 0.0.0.0

logfile "6381.log"

dbfilename "dump7002.rdb"

slaveof 192.168.108.128 6381(映射到主服务器上)

sentinel.conf的创建和配置:

port 26381

sentinel monitor mymaster192.168.108.128 6381

4.进行集群启动验证

分别在相应的文件夹进行启动：redis-server redis.conf

![Image 1][]

并分别启动哨兵监控:redis-sentinel sentinel.conf ![Image 1][]

以上是保证了linux下redis哨兵模式的部署成功，接下来是如何及集成到现有的SSM项目框架中

web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
      
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml,classpath:spring-jedis-2.xml</param-value>
      </context-param>
      
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>

<servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
      
      <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
          <param-name>encoding</param-name>
          <param-value>utf-8</param-value>
        </init-param>
        <init-param>
          <param-name>forceRequestEncoding</param-name>
          <param-value>true</param-value>
        </init-param>
        <init-param>
          <param-name>forceResponseEncoding</param-name>
          <param-value>true</param-value>
        </init-param>
      </filter>
      <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
      <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
      </filter>
      <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
      
      <filter>
        <filter-name>HttpPutFormContentFilter</filter-name>
        <filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
      </filter>
      <filter-mapping>
        <filter-name>HttpPutFormContentFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
      
      
    	<filter>
    		<filter-name>springSessionRepositoryFilter</filter-name>
    		<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    		</filter>
    		<filter-mapping>
    		<filter-name>springSessionRepositoryFilter</filter-name>
    		<url-pattern>/*</url-pattern>
    	</filter-mapping>
    </web-app>

dispatcherServlet-servlet.xml配置信息：

applicationContext.xml配置信息：

<?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:context="http://www.springframework.org/schema/context"
    	xmlns:aop="http://www.springframework.org/schema/aop"
    	xmlns:tx="http://www.springframework.org/schema/tx"
    	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
    		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
    		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
    
    	<context:component-scan base-package="com.atguigu">
    		<context:exclude-filter type="annotation"
    			expression="org.springframework.stereotype.Controller" />
    	</context:component-scan>
    	
    
    	
    	
    	<context:property-placeholder location="classpath:dbconfig.properties" />
    	<bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    		<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
    		<property name="driverClass" value="${jdbc.driverClass}"></property>
    		<property name="user" value="${jdbc.user}"></property>
    		<property name="password" value="${jdbc.password}"></property>
    	</bean>
    
    	
    	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    		
    		<property name="configLocation" value="classpath:mybatis-config.xml"></property>
    		<property name="dataSource" ref="pooledDataSource"></property>
    		
    		<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    	</bean>
    
    	
    	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    		
    		<property name="basePackage" value="com.atguigu.crud.dao"></property>
    	</bean>
    	
    	
    	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    		<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
    		<constructor-arg name="executorType" value="BATCH"></constructor-arg>
    	</bean>
    	
    
    	
    	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    		
    		<property name="dataSource" ref="pooledDataSource"></property>
    	</bean>
    	
    	
    	
    	<tx:advice id="txAdvice" transaction-manager="transactionManager">
    		<tx:attributes>
    			
    			<tx:method name="*"/>
    			
    			<tx:method name="get*" read-only="true"/>
    		</tx:attributes>
    	</tx:advice>
    	
    	<aop:config>
    		
    		<aop:pointcut expression="execution(* com.atguigu.crud.service..*(..))" id="txPoint"/>
    		
    		<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
    	</aop:config>
    	
    
    	
    	
    	
    </beans>

mybatis-config.xml配置信息：

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE configuration
      PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
      "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
    	<settings>
    		<setting name="mapUnderscoreToCamelCase" value="true"/>
    		 
            <setting name="cacheEnabled" value="true" />
            
            <setting name="lazyLoadingEnabled" value="true" />
            
            <setting name="aggressiveLazyLoading" value="false" />
            
            <setting name="multipleResultSetsEnabled" value="true" />
            
            <setting name="useColumnLabel" value="true" />
            
            <setting name="useGeneratedKeys" value="true" />
            
            <setting name="autoMappingBehavior" value="FULL" />
            
            <setting name="defaultExecutorType" value="BATCH" />
            
            <setting name="defaultStatementTimeout" value="25000" />
    	</settings>
    	
    	<typeAliases>
    		<package name="com.atguigu.crud.bean"/>
    	</typeAliases>
    	
    
    </configuration>

以上是ssm整合的配置信息，下面是集成redis的整合

spring-jedis-2.xml（这里我做了两种的测试，为了配置文件区别，在后面进行了版本识别）

`以下上java代码 RedisCache2.java`

package com.atguigu.crud.cache;
    
    import java.util.concurrent.locks.ReadWriteLock;
    import java.util.concurrent.locks.ReentrantReadWriteLock;
    
    import org.apache.ibatis.cache.Cache;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.data.redis.connection.RedisConnection;
    import org.springframework.data.redis.connection.jedis.JedisConnection;
    import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
    import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
    import org.springframework.data.redis.serializer.RedisSerializer;
    
    
    
    public class RedisCache2 implements Cache {
    
        private static JedisConnectionFactory jedisConnectionFactory;
                                              
        private final String id;
        private static final Logger LOGGER = LoggerFactory.getLogger(RedisCache2.class);
        
        private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
        
        public RedisCache2(final String id){
            if (id == null) {
                throw new IllegalArgumentException("cache instances require an ID");
            }
            this.id = id;
        }
        
        
        @Override
        public void clear() {
            RedisConnection connection = null;
            try {
                connection = jedisConnectionFactory.getConnection();
                connection.flushDb();
                connection.flushAll();
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (connection != null) {
                    connection.close();
                }
            }
        }
    
        @Override
        public String getId() {
            return this.id;
        }
    
        @Override
        public Object getObject(Object key) {
        	LOGGER.info("hahahah");
            System.out.println("查询--------------------------------key:"+key);
            Object result = null;
            RedisConnection connection = null;
            try {
                connection = jedisConnectionFactory.getConnection();
                RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer();
                result = serializer.deserialize(connection.get(serializer.serialize(key)));
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (connection != null) {
                    connection.close();
                }
            }
            
            return result;
        }
    
        @Override
        public ReadWriteLock getReadWriteLock() {
            return this.readWriteLock;
        }
    
        @Override
        public int getSize() {
            int result = 0;
            RedisConnection connection = null;
            try {
                connection = jedisConnectionFactory.getConnection();
                result = Integer.valueOf(connection.dbSize().toString());
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (connection != null) {
                    connection.close();
                }
            }
            return result;
        }
    
        @Override
        public void putObject(Object key, Object value) {
            System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>key:"+key);
              
            RedisConnection connection = null;
            try {
                connection = jedisConnectionFactory.getConnection();
                RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer();
                System.out.println("**"+serializer.serialize(key));
                connection.set(serializer.serialize(key), serializer.serialize(value));
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (connection != null) {
                    connection.close();
                }
            }
            
        }
    
        @Override
        public Object removeObject(Object key) {
        	RedisConnection connection = null;
            Object result = null;
            try {
                connection = jedisConnectionFactory.getConnection();
                RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer();
                result = connection.expireAt(serializer.serialize(key), 0);
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                if (connection != null) {
                    connection.close();
                }
            }
            return result;
        }
    
    
    	public static JedisConnectionFactory getJedisConnectionFactory() {
    		return jedisConnectionFactory;
    	}
    
    
    	public static void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory) {
    		RedisCache2.jedisConnectionFactory = jedisConnectionFactory;
    	}
    }

RedisCacheTransfer.java

package com.atguigu.crud.cache;
    
    import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
    
    
    public class RedisCacheTransfer {
        
        public void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory) {
           RedisCache2.setJedisConnectionFactory(jedisConnectionFactory);
        }
    }

User.java

package com.atguigu.crud.bean;
    
    import java.io.Serializable;
    
    public class User implements Serializable{
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = 1L;
    	private Integer id;
    	private String userName;
    	public Integer getId() {
    		return id;
    	}
    	public void setId(Integer id) {
    		this.id = id;
    	}
    	public String getUserName() {
    		return userName;
    	}
    	public void setUserName(String userName) {
    		this.userName = userName;
    	}
    }

UserDao.java(这里本人太懒 没有写太多方法)

package com.atguigu.crud.dao;
    
    import com.atguigu.crud.bean.User;
    
    public interface UserDao {
    	public User queryByPK(Integer id);
    }

UserMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.atguigu.crud.dao.UserDao">
     <cache eviction="LRU" type="com.atguigu.crud.cache.RedisCache2" />
      <select id="queryByPK" resultType="User">
      	select id,name userName from user where id = #{id}
      </select>
    </mapper>

IUserService.java

package com.atguigu.crud.service;
    
    
    import com.atguigu.crud.bean.User;
    
    
    public interface IUserService {
    	public User queryByPK(Integer id);
    }

IUserServiceImpl.java

package com.atguigu.crud.service.impl;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import com.atguigu.crud.bean.User;
    import com.atguigu.crud.dao.UserDao;
    import com.atguigu.crud.service.IUserService;
    
    @Service
    public class IUserServiceImpl implements IUserService{
    	@Autowired
    	private UserDao userDao;
    	@Override
    	public User queryByPK(Integer id) {
    		// TODO Auto-generated method stub
    		return userDao.queryByPK(id);
    	}
    	public UserDao getUserDao() {
    		return userDao;
    	}
    	public void setUserDao(UserDao userDao) {
    		this.userDao = userDao;
    	}
    	
    
    }

UserController.java

package com.atguigu.crud.controller;
    
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    import com.atguigu.crud.bean.User;
    import com.atguigu.crud.service.IUserService;
    
    @Controller
    public class UserController {
    	@Autowired
    	private IUserService iUserService;
    	@RequestMapping(value="/user/{id}",method=RequestMethod.GET)
    	@ResponseBody
    	public User getHello(@PathVariable("id")Integer id,HttpServletRequest request){
    		User user = iUserService.queryByPK(id);
    		request.getSession().setAttribute("user", user);
    		System.out.println(id);
    		return user;
    	}
    	
    	public IUserService getiUserService() {
    		return iUserService;
    	}
    
    	public void setiUserService(IUserService iUserService) {
    		this.iUserService = iUserService;
    	}
    	
    }

测试效果：

![Image 1][]  
![Center][]  
  
  
后台

![Image 1][]  
  
测试故障转移(关闭主机)

![Image 1][]

![Center 1][]

![Image 1][]

哨兵投票选取了6380端口为主机

![Center 2][]

![Image 1][]

测试成功

以上是自己写的小测试 大家发现错误请告诉我下，谢谢

项目源码下载地址

http://download.csdn.net/download/wangxuelei036/9981864

[Image 1]: 
[Center]: /images/20220608/7f14361f5d784b32bff12ccacbc385d9.png
[Center 1]: /images/20220608/9869d427c593450f870324b8b373de98.png
[Center 2]: /images/20220608/761417ac4a124094af23d8110dab484c.png