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1.springboot2 ehcache2 demo
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‎spring-boo2-ehcache2/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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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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>2.1.7.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.zzy</groupId>
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<artifactId>spring-boo2-ehcache2</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>spring-boo2-ehcache2</name>
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<description>springboot2结合ehcache2 demo</description>
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<properties>
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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-actuator</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-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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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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<!-- caching -->
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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>net.sf.ehcache</groupId>
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<artifactId>ehcache</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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<version>22.0</version>
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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>

‎spring-boo2-ehcache2/src/main/java/com/zzy/SpringBoo2Ehcache2Application.java

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package com.zzy;
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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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@SpringBootApplication
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@EnableCaching
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public class SpringBoo2Ehcache2Application {
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public static void main(String[] args) {
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SpringApplication.run(SpringBoo2Ehcache2Application.class, args);
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}
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}

‎spring-boo2-ehcache2/src/main/java/com/zzy/controller/IndexController.java

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package com.zzy.controller;
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import com.google.common.collect.ImmutableMap;
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import com.zzy.entity.User;
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import com.zzy.service.UserService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.ResponseBody;
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import org.springframework.web.bind.annotation.RestController;
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import java.util.List;
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import java.util.Map;
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/**
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* <p></p>
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* Created by zhezhiyong@163.com on 2017/9/21.
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*/
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@RestController
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public class IndexController {
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@Autowired
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private UserService userService;
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@GetMapping("/users")
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@ResponseBody
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public List<User> users() {
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return userService.list();
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}
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@GetMapping("/findUser/{id}")
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@ResponseBody
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public User findUserById(@PathVariable("id") Long id) {
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return userService.findUserById(id);
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}
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@GetMapping("/updateUser/{id}")
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@ResponseBody
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public User updateUserById(@PathVariable("id") Long id) {
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User user = userService.findUserById(id);
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user.setName("updateUserById");
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userService.update(user);
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return user;
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}
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@GetMapping("/deleteUser/{id}")
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@ResponseBody
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public Map deleteUser(@PathVariable("id") Long id) {
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userService.remove(id);
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return ImmutableMap.of("ret", 0, "msg", "ok");
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}
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}

‎spring-boo2-ehcache2/src/main/java/com/zzy/entity/Info.java

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package com.zzy.entity;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import java.io.Serializable;
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/**
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* <p></p>
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* Created by zhezhiyong@163.com on 2017/9/22.
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*/
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@Data
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@AllArgsConstructor
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public class Info implements Serializable {
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private String phone;
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private String address;
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}

‎spring-boo2-ehcache2/src/main/java/com/zzy/entity/User.java

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package com.zzy.entity;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.NoArgsConstructor;
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import java.io.Serializable;
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/**
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* <p></p>
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* Created by zhezhiyong@163.com on 2017/9/21.
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*/
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@Data
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@AllArgsConstructor
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@NoArgsConstructor
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public class User implements Serializable{
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private Long id;
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private String name;
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private String password;
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}

‎spring-boo2-ehcache2/src/main/java/com/zzy/service/UserService.java

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package com.zzy.service;
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import com.zzy.entity.User;
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import java.util.List;
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/**
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* <p></p>
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* Created by zhezhiyong@163.com on 2017/9/21.
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*/
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public interface UserService {
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List<User> list();
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User findUserById(Long id);
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User update(User user);
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void remove(Long id);
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}

‎spring-boo2-ehcache2/src/main/java/com/zzy/service/impl/UserServiceImpl.java

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package com.zzy.service.impl;
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import com.zzy.entity.User;
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import com.zzy.service.UserService;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.cache.annotation.CacheConfig;
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import org.springframework.cache.annotation.CacheEvict;
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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.stereotype.Service;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* <p></p>
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* Created by zhezhiyong@163.com on 2017/9/21.
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*/
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@Service
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@Slf4j
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@CacheConfig(cacheNames = "user")
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public class UserServiceImpl implements UserService {
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private Map<Long, User> userMap = new HashMap<>();
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public UserServiceImpl() {
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userMap.put(1L, new User(1L, "aaa", "666666"));
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userMap.put(2L, new User(2L, "bbb", "666666"));
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userMap.put(3L, new User(3L, "ccc", "666666"));
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}
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@Override
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public List list() {
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return Arrays.asList(userMap.values().toArray());
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}
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@Override
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@Cacheable(key = "#id")
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public User findUserById(Long id) {
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log.info("findUserById query from db, id: {}", id);
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return userMap.get(id);
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}
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@Override
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@CachePut(key = "#user.id")
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public User update(User user) {
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log.info("update db, user: {}", user.toString());
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userMap.put(user.getId(), user);
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return user;
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}
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@Override
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@CacheEvict(key = "#id")
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public void remove(Long id) {
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log.info("remove from db, id: {}", id);
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// userMap.remove(id);
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}
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}

‎spring-boo2-ehcache2/src/main/resources/application.properties

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spring.application.name=springboot2ehcache2
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spring.cache.type=ehcache
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spring.cache.ehcache.config=classpath:ehcache.xml

‎spring-boo2-ehcache2/src/main/resources/ehcache.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
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updateCheck="false">
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<diskStore path="user.home/ehcachefile/" />
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<!-- name：Cache的唯一标识
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maxElementsInMemory：内存中最大缓存对象数
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maxElementsOnDisk：磁盘中最大缓存对象数，若是0表示无穷大
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eternal：Element是否永久有效，一但设置了，timeout将不起作用
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overflowToDisk：配置此属性，当内存中Element数量达到maxElementsInMemory时，Ehcache将会Element写到磁盘中
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timeToIdleSeconds：设置Element在失效前的允许闲置时间。仅当element不是永久有效时使用，可选属性，默认值是0，也就是可闲置时间无穷大
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timeToLiveSeconds：设置Element在失效前允许存活时间。最大时间介于创建时间和失效时间之间。仅当element不是永久有效时使用，默认是0.，也就是element存活时间无穷大
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diskPersistent：是否缓存虚拟机重启期数据
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diskExpiryThreadIntervalSeconds：磁盘失效线程运行时间间隔，默认是120秒
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diskSpoolBufferSizeMB：这个参数设置DiskStore（磁盘缓存）的缓存区大小。默认是30MB。每个Cache都应该有自己的一个缓冲区
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memoryStoreEvictionPolicy：当达到maxElementsInMemory限制时，Ehcache将会根据指定的策略去清理内存。默认策略是LRU（最近最少使用）。你可以设置为FIFO（先进先出）或是LFU（较少使用） -->
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<defaultCache
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maxElementsInMemory="10000"
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eternal="false"
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overflowToDisk="true"
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timeToIdleSeconds="900"
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timeToLiveSeconds="900"
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diskPersistent="false"
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memoryStoreEvictionPolicy="LRU"
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diskExpiryThreadIntervalSeconds="120"/>
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<!-- 30分钟刷新一次缓存 -->
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<cache name="user" maxElementsInMemory="100" eternal="false" timeToIdleSeconds="900"
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timeToLiveSeconds="900" overflowToDisk="true" maxElementsOnDisk="10000" diskPersistent="true"
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diskExpiryThreadIntervalSeconds="120"
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memoryStoreEvictionPolicy="LRU"/>
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</ehcache>

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