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Spring Boot 鍏ラ棬 - 杩涢樁绡囷紙五锛? 鏁版嵁缂撳瓨(@Cacheable)

分类: IT文章 • 2024-11-30 14:25:01
Spring Boot 鍏ラ棬 - 杩涢樁绡囷紙5锛? 鏁版嵁缂撳瓨(@Cacheable)
缂撳瓨鍙互缂撹В鏁版嵁搴撹闂殑鍘嬪姏锛孲pring鑷韩涓嶆彁渚涚紦瀛樼殑瀛樺偍瀹炵幇锛岄渶瑕佸€熷姪绗笁鏂癸紝姣斿JCache銆丒hCache銆丠azelcast銆丷edis銆丟uava绛夈€係pring Boot鍙互鑷姩鍖栭厤缃悎閫傜殑缂撳瓨绠＄悊鍣紙CacheManager锛夛紝榛樿閲囩敤鐨勬槸ConcurrentMapCacheManager锛坖ava.util.concurrent.ConcurrentHashMap锛夈€?

锛?锛夋坊鍔?spring-boot-starter-cache 渚濊禆
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>


锛?锛夊紑鍚紦瀛樺姛鑳?/strong>
@Configuration
@EnableCaching
public class CacheConfig {

}


锛?锛夌紦瀛樻暟鎹?/strong>
瀵逛簬缂撳瓨鐨勬搷浣滐紝涓昏鏈夛細@Cacheable銆丂CachePut銆丂CacheEvict銆?

@Cacheable
Spring 鍦ㄦ墽琛?@Cacheable 鏍囨敞鐨勬柟娉曞墠鍏堟煡鐪嬬紦瀛樹腑鏄惁鏈夋暟鎹紝濡傛灉鏈夋暟鎹紝鍒欑洿鎺ヨ繑鍥炵紦瀛樻暟鎹紱鑻ユ病鏈夋暟鎹紝鎵ц璇ユ柟娉曞苟灏嗘柟娉曡繑鍥炲€兼斁杩涚紦瀛樸€?
鍙傛暟锛?value缂撳瓨鍚嶃€?key缂撳瓨閿€笺€?condition婊¤冻缂撳瓨鏉′欢銆乽nless鍚﹀喅缂撳瓨鏉′欢
@Cacheable(value = "user", key = "#id")
public User findById(final Long id) {
    System.out.println("cache miss, invoke find by id, id:" + id);
    for (User user : users) {
        if (user.getId().equals(id)) {
            return user;
        }
    }
    return null;
}


@CachePut
鍜?@Cacheable 绫讳技锛屼絾浼氭妸鏂规硶鐨勮繑鍥炲€兼斁鍏ョ紦瀛樹腑, 涓昏鐢ㄤ簬鏁版嵁鏂板鍜屼慨鏀规柟娉曘€?
@CachePut(value = "user", key = "#user.id")
public User save(User user) {
    users.add(user);
    return user;
}


@CacheEvict
鏂规硶鎵ц鎴愬姛鍚庝細浠庣紦瀛樹腑绉婚櫎鐩稿簲鏁版嵁銆?
鍙傛暟锛?value缂撳瓨鍚嶃€?key缂撳瓨閿€笺€?condition婊¤冻缂撳瓨鏉′欢銆?unless鍚﹀喅缂撳瓨鏉′欢銆?allEntries鏄惁绉婚櫎鎵€鏈夋暟鎹紙璁剧疆涓簍rue鏃朵細绉婚櫎鎵€鏈夌紦瀛橈級
@CacheEvict(value = "user", key = "#user.id") // 绉婚櫎鎸囧畾key鐨勬暟鎹?
public User delete(User user) {
    users.remove(user);
    return user;
}

@CacheEvict(value = "user", allEntries = true) // 绉婚櫎鎵€鏈夋暟鎹?
public void deleteAll() {
    users.clear();
}


锛?锛夐泦鎴怑hCache

<dependency>
    <groupId>net.sf.ehcache</groupId>
    <artifactId>ehcache</artifactId>
</dependency>


SpringBoot鍙互鑷姩閰嶇疆涓嶉渶瑕佷粈涔堢壒娈婅缃嵆鍙娇鐢ㄣ€?

src/main/resources/ehcache.xml
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="ehcache.xsd">
    <cache name="user" maxEntriesLocalHeap="200" timeToLiveSeconds="600">
    </cache>
</ehcache>


src\main\resources/application.properties
寮曠敤
spring.cache.ehcache.config=classpath:ehcache.xml


濡傛灉鎯宠嚜瀹氫箟璁剧疆涓€浜涗釜鎬у寲鍙傛暟鏃讹紝閫氳繃Java Config褰㈠紡閰嶇疆銆?
@Configuration
@EnableCaching
public class CacheConfig {

	@Bean
	public CacheManager cacheManager() {
		return new EhCacheCacheManager(ehCacheCacheManager().getObject());
	}

	@Bean
	public EhCacheManagerFactoryBean ehCacheCacheManager() {
		EhCacheManagerFactoryBean cmfb = new EhCacheManagerFactoryBean();
		cmfb.setConfigLocation(new ClassPathResource("ehcache.xml"));
		cmfb.setShared(true);
		return cmfb;
	}

}


锛?锛夌粍鍚圕acheManager

浠庡涓狢acheManager涓疆璇㈠緱鍒扮浉搴旂殑Cache銆?

@Configuration
@EnableCaching
public class CacheConfig {

    @Bean
    public CacheManager compositeCacheManager(RedisTemplate<Object, Object> redisTemplate) {
        CompositeCacheManager cacheManager = new CompositeCacheManager(new ConcurrentMapCacheManager(), new SimpleCacheManager());
        cacheManager.setFallbackToNoOpCache(false);
        cacheManager.afterPropertiesSet();
        return cacheManager;
    }

}


*** 璁剧疆缂撳瓨鏃犳晥鍖?spring.cache.type=none
*** 缂撳瓨鐨勫璞″繀椤诲疄鐜癝erializable
*** 闄uavaCacheManager涔嬪閮芥敮鎸丼pring浜嬪姟锛屽嵆鍥炴粴鏃禖ache鐨勬暟鎹篃浼氳绉婚櫎

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