Question

我有问题为ehcache设置正确的缓存，Spring boot 1.5.2

@EnableCaching
@EnableScheduling
@SpringBootApplication
public class CacheTestConfig extends SpringBootServletInitializer {

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

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

ehcache.xml中

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="ehcache.xsd" 
updateCheck="true"
monitoring="autodetect" 
dynamicConfig="true">

<diskStore path="java.io.tmpdir" />

<cache name="pujcka" 
    maxEntriesLocalHeap="100"
    maxEntriesLocalDisk="1000" 
    eternal="false" 
    diskSpoolBufferSizeMB="300"
    timeToLiveSeconds="600"
    memoryStoreEvictionPolicy="LFU" 
    transactionalMode="off">
    <persistence strategy="localTempSwap" />
</cache>

</ehcache>

PujckaCachingRepository .java

public interface PujckaCachingRepository extends CrudRepository<Pujcka, Integer> {
    static final String CACHE_MAME = "pujcka";

    @Override
    @Cacheable(cacheNames = CACHE_MAME, key = "#id", condition = "#id != null") // each calling select into DB - not cached
    //@Cacheable(cacheNames = CACHE_MAME, key = "#id", condition = "#id == null") //IllegalArgumentException Popis: Null key returned for cache operation 
//@Cacheable(cacheNames = CACHE_MAME)
Pujcka findOne(Integer id);

@Override
@Cacheable(cacheNames = CACHE_MAME)
Iterable<Pujcka> findAll();

@Override
    //@CachePut(cacheNames = CACHE_MAME, key = "#pujcka.id") //URL: http://localhost:8081/pujcka/nova Vyjimka: SpelEvaluationException Popis: EL1007E: Property or field 'id' cannot be found on null
@CachePut(cacheNames = CACHE_MAME)
<S extends Pujcka> S save(S pujcka);

@CacheEvict(cacheNames = CACHE_MAME)
default void refreshAll() {
    //This method will remove all 'products' from cache, say as a result of flush API.
}

}

Pujcka.java

@Entity
@ToString
@Getter @Setter
public class Pujcka implements Serializable{

private static final long serialVersionUID = -1385887062145410511L;

@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer id;

PujckaController.java

@Controller
@RequestMapping("pujcka")
public class PujckaController extends RootController {

@Autowired
private PujckaCachingRepository pujckaCachingRepository;

@RequestMapping(value = "nova", method = RequestMethod.POST)
public String ulozPujcku(@Valid Pujcka pujcka, BindingResult bindingResult, Model model) {
    pujckaCachingRepository.save(pujcka);
    pujckaCachingRepository.refreshAll();
    return "redirect:/pujcka/seznam";
}

@RequestMapping(value = "seznam", method = RequestMethod.GET)
public String seznam(Model model) {
    model.addAttribute("pujckaList", pujckaCachingRepository.findAll());
    return getRequestPath();
}

@RequestMapping(value = "edit/id/{id}", method = RequestMethod.GET)
public String edit(@PathVariable Integer id, Model model) {
    Pujcka pujcka = pujckaCachingRepository.findOne(id);
    model.addAttribute("pujcka", pujcka);
    return "pujcka/nova";
}

当我在第一次调用时刷新http://localhost:8081/pujcka/seznam时，来自DB的数据和第二次调用中的数据来自缓存。这很好。

当我刷新http://localhost:8081/pujcka/edit/id/1时，每次都称为DB，缓存不起作用。 ---为什么???? ---我做错了什么？

当我编辑数据并保存它时，选择全部被激活并更新列表，下一次刷新从缓存中填充 - 这工作正常

使用此设置使用缓存，但在缓存中是旧值

   //@Cacheable(cacheNames = CACHE_MAME)
   Pujcka findOne(Integer id);

感谢您的帮助

更新1 - 这有帮助，谢谢jmw5598

@Cacheable(cacheNames = CACHE_MAME, key = "#p0")
Pujcka findOne(Integer id);

@CachePut(cacheNames = CACHE_MAME, key="#result.id")
<S extends Pujcka> S save(S pujcka);

@CacheEvict(cacheNames = CACHE_MAME)
default void refreshAll() {
}

@Cacheable(cacheNames = CACHE_MAME)
Iterable<Pujcka> findAll();

控制器中的

pujckaCachingRepository.save(pujcka);
pujckaCachingRepository.refreshAll();

我删除了refreshAll（）方法，并尝试编辑一些行。对于调用findOne（id）是缓存工作，但是对于findAll（）没有更新，所以我返回了refreshAll（）方法。

这是正确的还是在编辑项目并调用save（pujcka）后如何在findAll（）中更新缓存？

Answer 1

由于您使用的是Spring Data JPA，我不相信您可以直接通过名称引用这些参数。您可以使用SpEL元数据来引用参数。

@Override
@Cacheable(cacheNames = CACHE_MAME, key = "#p0", condition = "#p0 != null")
Pujcka findOne(Integer id);

同样对于@CachePut，您可以使用结果元数据项来引用结果对象id（或者您想要用作键的任何字段）。

@Override
@CachePut(cacheNames = CACHE_MAME, key="#result.id")
<S extends Pujcka> S save(S pujcka);

https://docs.spring.io/spring/docs/current/spring-framework-reference/html/cache.html#cache-spel-context

Spring缓存ehcache问题

1 个答案: