我正在尝试实现Spring 3.1缓存,如here和here所解释,但它似乎不起作用:我的方法每次都会运行,即使它被标记为@cacheable . 我究竟做错了什么?
我已经将它移动到具有自己的配置文件的junit测试用例中,以将其与我的应用程序的其余部分隔离,但问题仍然存在 . 以下是相关文件:
spring 试验servlet.xml中
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
<cache:annotation-driven />
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager" p:cache-manager-ref="ehcache"/>
<bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"
p:config-location="classpath:ehcache.xml"/>
</beans>
ehcache.xml中
<ehcache>
<diskStore path="java.io.tmpdir"/>
<cache name="cache"
maxElementsInMemory="100"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"
maxElementsOnDisk="10000000"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="120"
memoryStoreEvictionPolicy="LRU"/>
</ehcache>
MyTest.java
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath:spring-test-servlet.xml"})
@Component
public class MyTest extends TestCase {
@Test
public void testCache1(){
for(int i = 0; i < 5; i++){
System.out.println("Calling someMethod...");
System.out.println(someMethod(0));
}
}
@Cacheable("testmethod")
private int someMethod(int val){
System.out.println("Not from cache");
return 5;
}
}
相关的Pom条目:(spring-version = 3.1.1.RELEASE)
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core</artifactId>
<version>2.5.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
当我运行测试时,Spring会发出一些调试消息,看起来我的缓存初始化没有错误
DEBUG: config.ConfigurationHelper - No CacheManagerEventListenerFactory class specified. Skipping...
DEBUG: ehcache.Cache - No BootstrapCacheLoaderFactory class specified. Skipping...
DEBUG: ehcache.Cache - CacheWriter factory not configured. Skipping...
DEBUG: config.ConfigurationHelper - No CacheExceptionHandlerFactory class specified. Skipping...
DEBUG: store.MemoryStore - Initialized net.sf.ehcache.store.MemoryStore for cache
DEBUG: disk.DiskStorageFactory - Failed to delete file cache.data
DEBUG: disk.DiskStorageFactory - Failed to delete file cache.index
DEBUG: disk.DiskStorageFactory - Matching data file missing (or empty) for index file. Deleting index file /var/folders/qg/xwdvsg6x3mx_z_rcfvq7lc0m0000gn/T/cache.index
DEBUG: disk.DiskStorageFactory - Failed to delete file cache.index
DEBUG: ehcache.Cache - Initialised cache: cache
DEBUG: config.ConfigurationHelper - CacheDecoratorFactory not configured. Skipping for 'cache'.
DEBUG: config.ConfigurationHelper - CacheDecoratorFactory not configured for defaultCache. Skipping for 'cache'.
但调试输出显示对someMethod的方法调用和someMethod内部的print语句之间没有缓存检查 .
有什么我想念的吗?
3 回答
来自http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/html/cache.html
和
您在同一目标对象中自行调用
someMethod
.您的
@Cacheable
方法不公开 .您需要定义一个与您在注释中引用的名称匹配的缓存(“testmethod”) . 在ehcache.xml中为该缓存创建一个条目 .
除了Lee Chee Kiam:这是我的小型项目的解决方案,只有边际使用绕过(未注释)方法调用 . The DAO is simply injected into itself as a proxy and calls it's own methods using that proxy instead of a simple method call. 因此考虑@Cacheable而不进行复杂的操作 .
强烈建议使用代码内文档,因为它对同事来说可能看起来很奇怪 . 但它易于测试,简单,快速实现,并使我完全成熟的AspectJ仪器 . 然而,对于更多的使用,我也建议像Lee Chee Kiam那样使用AspectJ解决方案 .