Question

我正在用XML配置实现Springcache，并希望摆脱所有注释。我只想替换applicationContext.xml文件中的注释。这是我的代码-

//DummyBean.java
package com.spring.example;
interface DummyBean {
    public String getCity();
}

//DummyBeanImpl.java
package com.spring.example;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.cache.annotation.EnableCaching;

@EnableCaching
@CacheConfig(cacheNames={"myCache"})
public class DummyBeanImpl implements DummyBean {

    private String city = "New York";

    @Cacheable()
    public String getCity() {
        System.out.println("DummyBean.getCity() called!");
        return city;
    }
}

SpringAwareAnnotationXMLConfig.java

package com.spring.example;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;

public class SpringAwareAnnotationXMLConfig {

  public static void main(String[] args) throws Exception {
    AbstractApplicationContext context = new GenericXmlApplicationContext("applicationContext.xml");

    DummyBean personService = (DummyBean) context.getBean("myBean");
    System.out.println(personService.getCity());
    System.out.println(personService.getCity());
    System.out.println(personService.getCity());

    ((AbstractApplicationContext) context).close();
  }
}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:context="http://www.springframework.org/schema/context"
           xmlns:cache="http://www.springframework.org/schema/cache"
           xmlns:c="http://www.springframework.org/schema/c"
           xmlns:p="http://www.springframework.org/schema/p"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
                               http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.2.xsd
                               http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd>


  <context:annotation-config/>
  <cache:annotation-driven cache-manager="cacheManager"/>
  <context:component-scan base-package="com.spring"/>

  <bean id="myBean" class="com.spring.example.DummyBeanImpl"/>

  <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
    <property name="caches">
      <set>
        <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" p:name="myCache"/>
      </set>
    </property>
  </bean>

  <cache:advice id="cacheAdvice" cache-manager="cacheManager">
    <cache:caching cache="myCache">
      <cache:cacheable method="getCity"/>
    </cache:caching>
  </cache:advice>
</beans>

如您所见，如果我在Java代码中保留了@ EnableCaching，@ CacheConfig，@ Cacheable批注，那么缓存工作正常，并且我得到以下输出-

DummyBean.getCity() called!
New York
New York
New York

但是，如果我删除注释，那么我将得到以下输出-

DummyBean.getCity() called!
New York
DummyBean.getCity() called!
New York
DummyBean.getCity() called!
New York

这意味着缓存不起作用！

但是我的期望是，在applicationContext.xml文件中，我已经通过<cache:annotation-driven cache-manager="cacheManager"/>启用了缓存，我已经提到了缓存名称，并且已经使用要实现缓存的方法名称配置了缓存。。因此，如果省略注释，则应该获得所需的输出。但是为什么我没有得到？

谢谢尼尔玛利亚

Answer 1

使用XML配置的外观时，您还需要添加aop:config部分以应用外观。

<aop:config>
    <aop:advisor advice-ref="cacheAdvice" pointcut="execution(* com.spring.example.DummyBean+.*(..))"/>
</aop:config>

假设DummyBean是由com.spring.example.DummyBeanImpl实现的接口，那么就可以解决问题。这表明您要将cacheAdvice（方面）应用于与表达式匹配的bean。

另请参阅reference guide

Springcache不适用于XML配置

1 个答案: