运行Spring单元测试的AOP问题 [英] AOP problem running Spring unit tests
本文介绍了运行Spring单元测试的AOP问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个Spring Web应用程序，该应用程序配置为对AOP使用JDK代理.在接口而不是实现类上声明AOP批注(例如@Transactional).
应用程序本身运行良好，但是当我运行单元测试时，它似乎正在尝试将CGLIB用于AOP功能(而不是JDK代理).这会导致测试失败-我在下面附加了堆栈跟踪.
我不理解为什么在运行测试时使用CGLIB，因为Spring配置与应用程序运行时基本相同.一个可能的显着差异是测试配置使用 DataSourceTransactionManager 而不是JTA事务管理器.测试类本身都扩展了 AbstractJUnit4SpringContextTests ，难道是该类在某种程度上很难使用CGLIB吗?
Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class $Proxy25]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy25
at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:213)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:488)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:363)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:324)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:361)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1343)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
... 79 more
Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy25
at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:446)
at net.sf.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:285)
at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:201)
... 86 more
评论者之一要求我发布Spring配置.我在下面以缩写形式将其包括在内(即，省略了无关的bean和XML名称空间).
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans>
<!-- ANNOTATION SUPPORT -->
<!-- Include basic annotation support -->
<context:annotation-config/>
<!-- CONTROLLERS -->
<!-- Controllers, force scanning -->
<context:component-scan base-package="com.onebigplanet.web.controller,com.onebigplanet.web.ws.*"/>
<!-- Post-processor for @Aspect annotated beans, which converts them into AOP advice -->
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator">
<property name="proxyTargetClass" value="true"/>
</bean>
<!-- An @Aspect bean that converts exceptions thrown in POJO service implementation classes to runtime exceptions -->
<bean id="permissionAdvisor" class="com.onebigplanet.web.advisor.PermissionAdvisor"/>
<bean id="businessIntelligenceAdvisor" class="com.onebigplanet.web.advisor.bi.BusinessIntelligenceAdvisor"/>
<!-- Finds the controllers and sets an interceptor on each one -->
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
<property name="interceptors">
<list>
<bean class="com.onebigplanet.web.interceptor.PortalInterceptor"/>
</list>
</property>
</bean>
<!-- METHOD HANDLER ADAPTER -->
<!-- Finds mapping of url through annotation on methods of Controller -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="cacheSeconds" value="0"/>
<property name="webBindingInitializer">
<bean class="com.onebigplanet.web.binder.WebBindingInitializer"/>
</property>
</bean>
</beans>
applicationContext-service.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans>
<!-- Declares a bunch of bean post-processors -->
<context:annotation-config/>
<context:component-scan base-package="com.onebigplanet.service.impl,com.onebigplanet.dao.impl.mysql" annotation-config="false"/>
<!-- Property configurer -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/obp-service.properties" />
</bean>
<!-- Post-processor for @Aspect annotated beans, which converts them into AOP advice -->
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"/>
<!-- An @Aspect bean that converts exceptions thrown in service implementation classes to runtime exceptions -->
<bean id="exceptionAdvisor" class="com.onebigplanet.service.advisor.ExceptionAdvisor"/>
<bean id="cachingAdvisor" class="com.onebigplanet.service.advisor.CacheAdvisor"/>
<bean id="businessIntelligenceAffiliateAdvisor" class="com.onebigplanet.service.advisor.BusinessIntelligenceAffiliateAdvisor"/>
<!-- Writable datasource -->
<jee:jndi-lookup id="dataSource" jndi-name="java:/ObpDS"/>
<!-- ReadOnly datasource -->
<jee:jndi-lookup id="readOnlyDataSource" jndi-name="java:/ObpReadOnlyDS"/>
<!-- Map the transaction manager to allow easy lookup of a UserTransaction -->
<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"/>
<!-- Annotation driven transaction management -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
applicationContext-test.xml 仅在运行单元测试时包括.目的是覆盖其他配置文件中声明的某些Bean.
<?xml version="1.0" encoding="UTF-8"?>
<beans>
<!-- Overwrite the property configurer bean such that it reads the test properties file instead -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/obp-test.properties"/>
</bean>
<!-- All DAOs should use the test datasource -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${testDataSource.driverClassName}"/>
<property name="url" value="${testDataSource.url}"/>
<property name="username" value="${testDataSource.username}"/>
<property name="password" value="${testDataSource.password}"/>
</bean>
<bean id="readOnlyDataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${testDataSource.driverClassName}"/>
<property name="url" value="${testDataSource.url}"/>
<property name="username" value="${testDataSource.username}"/>
<property name="password" value="${testDataSource.password}"/>
</bean>
<!--
Overwrite the JTA transaction manager bean defined in applicationContent-service.xml with this one because
the implementation of the former is provided by JBoss
-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<beans>
解决方案
听起来像您引用的是实现类而不是接口.有一个混合JDK和CGLIB代理"
一篇很棒的博客文章，解释了优缺点JDK与CGLIB代理的对比.
I have a Spring web application which is configured to use JDK proxying for AOP. The AOP annotations (such as @Transactional) are declared on the interfaces, rather than the implementation classes.
The application itself works fine, but when I run the unit tests, it seems to be attempting to use CGLIB for the AOP functionality (instead of JDK proxying). This causes the tests to fail - I've appended the stack trace below.
I don't understand why CGLIB is being used when I run the tests, because the Spring configuration is largely the same as when the application is running. One possibly significant difference is that the test configuration uses a DataSourceTransactionManager instead of a JTA transaction manager. The test classes themselves all extend AbstractJUnit4SpringContextTests, could it be that this class is somehow hard-wired to use CGLIB?
Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class $Proxy25]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy25
at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:213)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:488)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:363)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:324)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:361)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1343)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
... 79 more
Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy25
at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:446)
at net.sf.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:285)
at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:201)
... 86 more
EDIT: One of the commentators requested that I post the Spring configuration. I've included it below in abbreviated form (i.e. irrelevant beans and XML namespaces omitted).
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans>
<!-- ANNOTATION SUPPORT -->
<!-- Include basic annotation support -->
<context:annotation-config/>
<!-- CONTROLLERS -->
<!-- Controllers, force scanning -->
<context:component-scan base-package="com.onebigplanet.web.controller,com.onebigplanet.web.ws.*"/>
<!-- Post-processor for @Aspect annotated beans, which converts them into AOP advice -->
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator">
<property name="proxyTargetClass" value="true"/>
</bean>
<!-- An @Aspect bean that converts exceptions thrown in POJO service implementation classes to runtime exceptions -->
<bean id="permissionAdvisor" class="com.onebigplanet.web.advisor.PermissionAdvisor"/>
<bean id="businessIntelligenceAdvisor" class="com.onebigplanet.web.advisor.bi.BusinessIntelligenceAdvisor"/>
<!-- Finds the controllers and sets an interceptor on each one -->
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
<property name="interceptors">
<list>
<bean class="com.onebigplanet.web.interceptor.PortalInterceptor"/>
</list>
</property>
</bean>
<!-- METHOD HANDLER ADAPTER -->
<!-- Finds mapping of url through annotation on methods of Controller -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="cacheSeconds" value="0"/>
<property name="webBindingInitializer">
<bean class="com.onebigplanet.web.binder.WebBindingInitializer"/>
</property>
</bean>
</beans>
applicationContext-service.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans>
<!-- Declares a bunch of bean post-processors -->
<context:annotation-config/>
<context:component-scan base-package="com.onebigplanet.service.impl,com.onebigplanet.dao.impl.mysql" annotation-config="false"/>
<!-- Property configurer -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/obp-service.properties" />
</bean>
<!-- Post-processor for @Aspect annotated beans, which converts them into AOP advice -->
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"/>
<!-- An @Aspect bean that converts exceptions thrown in service implementation classes to runtime exceptions -->
<bean id="exceptionAdvisor" class="com.onebigplanet.service.advisor.ExceptionAdvisor"/>
<bean id="cachingAdvisor" class="com.onebigplanet.service.advisor.CacheAdvisor"/>
<bean id="businessIntelligenceAffiliateAdvisor" class="com.onebigplanet.service.advisor.BusinessIntelligenceAffiliateAdvisor"/>
<!-- Writable datasource -->
<jee:jndi-lookup id="dataSource" jndi-name="java:/ObpDS"/>
<!-- ReadOnly datasource -->
<jee:jndi-lookup id="readOnlyDataSource" jndi-name="java:/ObpReadOnlyDS"/>
<!-- Map the transaction manager to allow easy lookup of a UserTransaction -->
<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"/>
<!-- Annotation driven transaction management -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
applicationContext-test.xml This is only included when running the unit tests. It's purpose is to overwrite some of the beans declared in the other config files.
<?xml version="1.0" encoding="UTF-8"?>
<beans>
<!-- Overwrite the property configurer bean such that it reads the test properties file instead -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/obp-test.properties"/>
</bean>
<!-- All DAOs should use the test datasource -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${testDataSource.driverClassName}"/>
<property name="url" value="${testDataSource.url}"/>
<property name="username" value="${testDataSource.username}"/>
<property name="password" value="${testDataSource.password}"/>
</bean>
<bean id="readOnlyDataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${testDataSource.driverClassName}"/>
<property name="url" value="${testDataSource.url}"/>
<property name="username" value="${testDataSource.username}"/>
<property name="password" value="${testDataSource.password}"/>
</bean>
<!--
Overwrite the JTA transaction manager bean defined in applicationContent-service.xml with this one because
the implementation of the former is provided by JBoss
-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<beans>
解决方案
Sounds like you're referencing an implementation class instead of an interface. There is an excerpt here with more detail.
A Spring forum post: "Mixing JDK and CGLIB proxies"
A great blog post explaining pros and cons of JDK vs. CGLIB proxies.
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