弹簧缓存-空键返回用于缓存操作

Question

我一直在使用Spring Cache Abstraction和ehcache。我在目标方法上使用@Cacheable注解，如下所示：

@Component
public class DataService {
    @Cacheable(value="movieFindCache", key="#name")
    public String findByDirector(String name) {
        return "hello";
    }
}

这是我的jUnit测试：

public class ServiceTest extends AbstractJUnit4SpringContextTests{

    @Resource
    private DataService dataService;

    @Test
    public void test_service() {
        System.err.println(dataService.findByDirector("Hello"));
    }
}

当我使用jUnit test调试时，这不能正常工作。它引发一个IllegalArgumentException，如下所示：

java.lang.IllegalArgumentException: Null key returned for cache operation (maybe you are using named params on classes without debug info?) CacheableOperation[public java.lang.String com.eliteams.quick4j.web.service.ExcelDataService.getCarData()] caches=[movieFindCache] | key='#name' | condition='' | unless=''
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.cache.interceptor.CacheAspectSupport.generateKey(CacheAspectSupport.java:315)
at org.springframework.cache.interceptor.CacheAspectSupport.collectPutRequests(CacheAspectSupport.java:265)

我有以下配置：

applicationContext.xml：

<cache:annotation-driven cache-manager="cacheManager"/>
<bean id="ehCacheManagerFactory" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"
      p:configLocation="classpath:ehcache.xml" p:shared="true"/>
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"
      p:cacheManager-ref="ehCacheManagerFactory"/>

ehcache.xml：

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

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

<cache name="movieFindCache"
       maxEntriesLocalHeap="10000"
       maxEntriesLocalDisk="1000"
       eternal="false"
       diskSpoolBufferSizeMB="20"
       timeToIdleSeconds="300" timeToLiveSeconds="600"
       memoryStoreEvictionPolicy="LFU"
       transactionalMode="off">
    <persistence strategy="localTempSwap" />
</cache>

注意：如果我未在@Cacheable批注中指定“键”，它将起作用。

有什么我忘记指定的吗？配置？注释？

Answer 1

您可以尝试将密钥替换为＃p0

@Component
public class DataService {
    @Cacheable(value="movieFindCache", key="#p0")
    public String findByDirector(String name) {
        return "hello";
    }
}

Spring Cache Abstraction VS接口VS密钥参数的引用 （“为缓存操作返回了空密钥”错误）

Answer 2

有同样的问题，根本原因是在测试参数真的为空，所以，只是添加了非空检查

@Cacheable(value="movieFindCache", key="#p0", condition="#p0!=null")
public String findByDirector(String name) {...}