Spring Cache的使用示例详解

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
    <version>3.1.5</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>6.0.13</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>6.0.13</version>
</dependency>

@Configuration
@EnableCaching
public class CachingConfig {
    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager("users");
    }
}

    <!-- Ehcache -->
    <dependency>
        <groupId>org.ehcache</groupId>
        <artifactId>ehcache</artifactId>
    </dependency>
    <!-- Spring Integration for Ehcache -->
    <dependency>
        <groupId>javax.cache</groupId>
        <artifactId>cache-api</artifactId>
    </dependency>
    <dependency>
        <groupId>org.ehcache</groupId>
        <artifactId>ehcache-jsr107</artifactId>
    </dependency>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd">
    <cache name="card:id"
           maxEntriesLocalHeap="1000"
           eternal="false"
           timeToIdleSeconds="10"
           timeToLiveSeconds="30"
           memoryStoreEvictionPolicy="LRU"/>
</ehcache>

@Cacheable("card:id")
public String getCardById(Long id) {...}

String data = cacheManager.get(cacheKey)
if(data == null) {
	data = getCardById(id)
	cacheManager.put(cacheKey, data)
}
return cached;

String data = cacheManager.get(cacheKey)
if(data == null) {
	synchronized(cacheKey) {
		data = cacheManager.get(cacheKey);
		if(data == null) {
			data = getCardById(id)
			cacheManager.put(cacheKey, data)
		}
	}
}
return cached;

@CacheEvict(value="card:id", allEntries=true)
public String updateCardById(Long cardId, Customer customer) {...}

@CacheEvict(value="card:id",, key = "'card_' + #cardId")
public String updateCardById(Long cardId, Customer customer) {...}

@CachePut("card:id")
public String getCardById(Long id) {...}

@Caching(evict = { 
  @CacheEvict("addresses"), 
  @CacheEvict(value="directory", key="#customer.name") })
public String getAddress(Customer customer) {...}

@CacheConfig(cacheNames={"addresses"})
public class CustomerDataService {
    @Cacheable
    public String getAddress(Customer customer) {...}
}

@CachePut(value="addresses", condition="#customer.name=='Tom'")
public String getAddress(Customer customer) {...}
@CachePut(value="addresses", unless="#result.length()<64")
public String getAddress(Customer customer) {...}

@Cacheable(cacheNames="books", key="#isbn")
public Book findBook(ISBN isbn, boolean checkWarehouse, boolean includeUsed)
@Cacheable(cacheNames="books", key="#isbn.rawNumber")
public Book findBook(ISBN isbn, boolean checkWarehouse, boolean includeUsed)
@Cacheable(cacheNames="books", key="T(someType).hash(#isbn)")
public Book findBook(ISBN isbn, boolean checkWarehouse, boolean includeUsed)

@Cacheable(cacheNames="books", keyGenerator="myKeyGenerator")
public Book findBook(ISBN isbn, boolean checkWarehouse, boolean includeUsed)

@Bean
CacheManager cacheManager() {
	CaffeineCacheManager cacheManager = new CaffeineCacheManager();
	cacheManager.setCacheSpecification(...);
	cacheManager.setAsyncCacheMode(true);
	return cacheManager;
}