我一直在使用Spring Cache Abstraction和 Ehcache
。我正在使用@Cacheable
注解来标注一个目标方法,如下所示:
我一直在使用Spring Cache Abstraction和 Ehcache
。我正在使用@Cacheable
注解来标注一个目标方法,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测试进行调试时,情况并不理想。它会抛出一个如下所示的IllegalArgumentException
:
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:如果我在@Cacheable
注释中没有指定“key”,它会正常工作。
我是否忘记了需要指定的内容?例如配置或注释?
dataService.findByDirector()
缺少参数。 - xedoSystem.err.println(dataService.findByDirector());
你没有向该方法传递任何name
参数。例如,应该是System.err.println(dataService.findByDirector("John Smith"));
- Guillaume Polet