Spring Boot Cache使用方法整合程式碼例項
阿新 • • 發佈:2020-02-28
參考:
Spring Cache擴充套件功能實現
專案地址
使用本地Caffeine快取
引入依賴包
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> </dependency> <dependency> <groupId>com.github.ben-manes.caffeine</groupId> <artifactId>caffeine</artifactId> <version>2.6.2</version> </dependency>
自定義Caffeine配置
CachingConfig.java
package com.vcredit.vmp.checkcenter.config; import com.github.benmanes.caffeine.cache.Cache; import com.github.benmanes.caffeine.cache.Caffeine; import com.vcredit.vmp.checkcenter.common.properties.CaffeineCacheProperties; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; import org.springframework.cache.CacheManager; import org.springframework.cache.annotation.EnableCaching; import org.springframework.cache.caffeine.CaffeineCache; import org.springframework.cache.support.SimpleCacheManager; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import java.time.Duration; import java.util.*; /** * 快取配置 * @author kancy */ @Configuration @EnableCaching public class CachingConfig { @Autowired CaffeineCacheProperties caffeineCacheProperties; /** * 建立基於Caffeine的Cache Manager * @return */ @Bean @Primary @ConditionalOnProperty(prefix = "system.cache.caffeine",name = "enabled",havingValue = "true") public CacheManager caffeineCacheManager() { SimpleCacheManager cacheManager = new SimpleCacheManager(); Map<String,CaffeineCache> cacheMap = new HashMap(); // 設定全域性配置的本地快取 List<String> globalCacheNames = caffeineCacheProperties.getCacheName(); if(globalCacheNames !=null && !globalCacheNames.isEmpty()){ addCacheObject(cacheMap,globalCacheNames,caffeineCacheProperties.getExpireAfterWrite(),caffeineCacheProperties.getExpireAfterAccess(),caffeineCacheProperties.getMaximumSize()); } // 設定自定義屬性快取,可以覆蓋全域性快取 List<CaffeineCacheProperties.Config> configs = caffeineCacheProperties.getConfigs(); if(configs != null && !configs.isEmpty()){ for (CaffeineCacheProperties.Config config : configs) { List<String> cacheNames = config.getCacheName(); if (cacheNames == null || cacheNames.isEmpty()){ continue; } Duration expireAfterWrite = Optional.ofNullable(config.getExpireAfterWrite()).orElse(caffeineCacheProperties.getExpireAfterWrite()); Duration expireAfterAccess = Optional.ofNullable(config.getExpireAfterAccess()).orElse(caffeineCacheProperties.getExpireAfterAccess()); Long maximumSize = Optional.ofNullable(config.getMaximumSize()).orElse(caffeineCacheProperties.getMaximumSize()); addCacheObject(cacheMap,cacheNames,expireAfterWrite,expireAfterAccess,maximumSize); } } // 加入到快取管理器進行管理 cacheManager.setCaches(cacheMap.values()); return cacheManager; } private void addCacheObject(Map<String,CaffeineCache> cacheMap,List<String> cacheNames,Duration expireAfterWrite,Duration expireAfterAccess,Long maximumSize) { for (String cacheName : cacheNames) { // spring.cache.caffeine: maximumSize=500,expireAfterAccess=10s,expireAfterWrite=15s Caffeine<Object,Object> recordStats = Caffeine.newBuilder().recordStats().maximumSize(maximumSize); if(expireAfterAccess != null) recordStats.expireAfterAccess(expireAfterAccess); if(expireAfterWrite != null) recordStats.expireAfterWrite(expireAfterWrite); Cache<Object,Object> cache = recordStats.build(); CaffeineCache caffeineCache = new CaffeineCache(cacheName,cache); // 覆蓋新增 cacheMap.put(cacheName,caffeineCache); } } }
CaffeineCacheProperties.java
package com.vcredit.vmp.checkcenter.common.properties; import lombok.Getter; import lombok.Setter; import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.Configuration; import java.time.Duration; import java.util.List; /** * Caffeine本地快取自定義配置 * @author kancy */ @Getter @Setter @Configuration @ConfigurationProperties("system.cache.caffeine") @ConditionalOnProperty(prefix = "system.cache.caffeine",havingValue = "true") public class CaffeineCacheProperties { private List<String> cacheName; private Duration expireAfterWrite; private Duration expireAfterAccess; private Long maximumSize = Long.valueOf(-1); private List<Config> configs; @Getter @Setter public static class Config { private List<String> cacheName; Duration expireAfterWrite; Duration expireAfterAccess; Long maximumSize; } }
application.yml
system.cache.caffeine: enabled: true # 全域性配置 cacheName: cache1,cache2,cache3 expireAfterWrite: 60s expireAfterAccess: 30s maximumSize: 500 # 自定義配置,cacheName相同可覆蓋全域性 configs: - cacheName: checkApplyCache expireAfterAccess: 10s - cacheName: userQueryCache expireAfterAccess: 15s
使用快取
@Cacheable(value = { "checkApplyCache" },key="#req.md5") public Result check(CheckReq req) { // your code... return Result.ok(); }
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