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使用Redis做集中式缓存
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‎Chapter4-4-2/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.didispace</groupId>
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<artifactId>Chapter4-4-2</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<name>Chapter4-4-2</name>
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<description>Spring Boot project</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>1.3.2.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>5.1.21</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-jpa</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-cache</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-redis</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎Chapter4-4-2/src/main/java/com/didispace/Application.java‎

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package com.didispace;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cache.annotation.EnableCaching;
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/**
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* @author 程序猿DD
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* @version 1.0.0
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* @date 16/3/23 下午2:34.
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* @blog http://blog.didispace.com
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*/
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@SpringBootApplication
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@EnableCaching
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public class Application {
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public static void main(String[] args) {
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SpringApplication.run(Application.class, args);
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}
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}

‎Chapter4-4-2/src/main/java/com/didispace/domain/User.java‎

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package com.didispace.domain;
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import javax.persistence.Column;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.Id;
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import java.io.Serializable;
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/**
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* @author 程序猿DD
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* @version 1.0.0
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* @date 16/3/21 下午3:35.
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* @blog http://blog.didispace.com
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*/
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@Entity
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public class User implements Serializable {
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@Id
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@GeneratedValue
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private Long id;
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@Column(nullable = false)
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private String name;
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@Column(nullable = false)
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private Integer age;
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public User(){}
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public User(String name, Integer age) {
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this.name = name;
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this.age = age;
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}
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Integer getAge() {
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return age;
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}
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public void setAge(Integer age) {
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this.age = age;
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}
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}

‎Chapter4-4-2/src/main/java/com/didispace/domain/UserRepository.java‎

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package com.didispace.domain;
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import org.springframework.cache.annotation.CacheConfig;
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import org.springframework.cache.annotation.CachePut;
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import org.springframework.cache.annotation.Cacheable;
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import org.springframework.data.jpa.repository.JpaRepository;
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/**
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* @author 程序猿DD
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* @version 1.0.0
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* @date 16/3/23 下午2:34.
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* @blog http://blog.didispace.com
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*/
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@CacheConfig(cacheNames = "users")
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public interface UserRepository extends JpaRepository<User, Long> {
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@Cacheable(key = "#p0")
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User findByName(String name);
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@CachePut(key = "#p0.name")
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User save(User user);
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}

‎Chapter4-4-2/src/main/resources/application.properties‎

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spring.datasource.url=jdbc:mysql://localhost:3306/test
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spring.datasource.username=root
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spring.datasource.password=123456
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spring.datasource.driver-class-name=com.mysql.jdbc.Driver
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spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
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spring.jpa.properties.hibernate.show_sql=true
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spring.redis.host=localhost
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spring.redis.port=6379
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spring.redis.pool.max-idle=8
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spring.redis.pool.min-idle=0
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spring.redis.pool.max-active=8
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spring.redis.pool.max-wait=-1
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‎Chapter4-4-2/src/test/java/com/didispace/ApplicationTests.java‎

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package com.didispace;
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import com.didispace.domain.User;
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import com.didispace.domain.UserRepository;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.SpringApplicationConfiguration;
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import org.springframework.cache.CacheManager;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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/**
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* @author 程序猿DD
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* @version 1.0.0
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* @date 16/3/23 下午2:34.
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* @blog http://blog.didispace.com
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*/
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@RunWith(SpringJUnit4ClassRunner.class)
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@SpringApplicationConfiguration(Application.class)
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public class ApplicationTests {
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@Autowired
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private UserRepository userRepository;
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@Autowired
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private CacheManager cacheManager;
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@Before
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public void before() {
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userRepository.save(new User("AAA", 10));
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}
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@Test
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public void test() throws Exception {
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User u1 = userRepository.findByName("AAA");
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System.out.println("第一次查询：" + u1.getAge());
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User u2 = userRepository.findByName("AAA");
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System.out.println("第二次查询：" + u2.getAge());
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u1.setAge(20);
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userRepository.save(u1);
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User u3 = userRepository.findByName("AAA");
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System.out.println("第三次查询：" + u3.getAge());
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}
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}

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