Spring集成GuavaCache实现本地缓存

Spring集成GuavaCache实现本地缓存:

一、SimpleCacheManager集成GuavaCache

 1 package com.bwdz.sp.comm.util.test;
 2 
 3 import com.google.common.cache.CacheBuilder;
 4 import org.springframework.cache.CacheManager;
 5 import org.springframework.cache.annotation.EnableCaching;
 6 import org.springframework.cache.guava.GuavaCache;
 7 import org.springframework.cache.support.SimpleCacheManager;
 8 import org.springframework.context.annotation.Bean;
 9 import org.springframework.context.annotation.Configuration;
10 
11 import java.util.Arrays;
12 import java.util.concurrent.TimeUnit;
13 
14 //@Configuration用于定义配置类,相当于把该类作为spring的xml配置文件,里面包含<beans>,作用为:初始化Spring容器(应用上下文)
15 //@EnableCaching注解驱动的缓存管理功能:不需要在XML文件中配置cache manager了,等价于<cache:annotation-driven/>.能够在服务类方法上标注@Cacheable
16 //@Bean标注在方法上(返回某个实例的方法),等价于spring的xml配置文件中的<bean>,作用为:注册bean对象
17 @Configuration
18 @EnableCaching
19 public class CacheConfig {
20     @Bean
21     public CacheManager localCacheManager() {
22         SimpleCacheManager simpleCacheManager = new SimpleCacheManager();
23         //把各个cache注册到cacheManager中,GuavaCache实现了org.springframework.cache.Cache接口
24         simpleCacheManager.setCaches(Arrays.asList(
25                 //CacheBuilder构建多个cache
26                 new GuavaCache(
27                         "TIMEOUT_1_HOURS",//定义cache名称:@Cacheable的cacheNames(等价value)属性要和此对应
28                         CacheBuilder
29                                 .newBuilder()
30                                 .expireAfterWrite(1, TimeUnit.HOURS)//参数:过期时长、单位
31                                 .build()
32                 ),
33                 new GuavaCache(
34                         "TIMEOUT_5_MINUTE",
35                         CacheBuilder
36                                 .newBuilder()
37                                 .expireAfterWrite(5, TimeUnit.MINUTES)
38                                 .build()
39                 )
40         ));
41         return simpleCacheManager;
42     }
43 }

二、集成后直接加注解使用

1     //key:缓存的 key,可以为空,如果指定要按照 SpEL 表达式编写(当然随便指定也不会报错)
2     @Cacheable(cacheNames = "TIMEOUT_1_HOURS", key = "'cache_getXfshxxss'")
3     public List<Map> getXfshxxss() throws Exception {
4         return (List<Map>) dao.findForList("XxkpsjtbMapper.getXfshxxss", null);
5     }

 

1、Spring中的cache是为方法做缓存的,spring只是提供了个缓存抽象,具体的实现由第三方提供(比如guava或者自己编写)

3、GuavaCache 支持多种缓存过期策略:定时过期、定时刷新等等

4、本地缓存:GuavaCache、ehcache、CaffeineCache,分布式缓存(网络缓存):redis、memcached

 

https://blog.csdn.net/qq_34531925/article/details/80864773

https://segmentfault.com/a/1190000011105644

 

posted @ 2018-11-21 14:56  酸牛奶  阅读(3516)  评论(0编辑  收藏  举报