Cannot convert value of type [$Proxy29] to required type

[erikvaningen]

I setted up caching based on Spring modules with EHCache. Caching works well, but flushing fails in my test (AbstractJpaTests):

Cannot convert value of type [$Proxy29] to required type [org.fao.fenix.persistence.perspective.TableDao] for property 'tableDao': no matching editors or conversion strategy found

when I use
@CacheFlush(modelId = "fenixCacheFlushing")

My TableDao looks like this:

@Repository
@Transactional
public class TableDao {

	@PersistenceContext
	private EntityManager entityManager;

This is the full stacktrace:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pog' defined in class path resource [applicationContext-test.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [$Proxy29] to required type [org.fao.fenix.persistence.perspective.TableDao] for property 'tableDao'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [$Proxy29] to required type [org.fao.fenix.persistence.perspective.TableDao] for property 'tableDao': no matching editors or conversion strategy found
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:478)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.test.jpa.AbstractJpaTests.runBare(AbstractJpaTests.java:230)
	at junit.framework.TestResult$1.protect(TestResult.java:110)
	at junit.framework.TestResult.runProtected(TestResult.java:128)
	at junit.framework.TestResult.run(TestResult.java:113)
	at junit.framework.TestCase.run(TestCase.java:120)
	at junit.framework.TestSuite.runTest(TestSuite.java:228)
	at junit.framework.TestSuite.run(TestSuite.java:223)
	at org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type [$Proxy29] to required type [org.fao.fenix.persistence.perspective.TableDao] for property 'tableDao'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [$Proxy29] to required type [org.fao.fenix.persistence.perspective.TableDao] for property 'tableDao': no matching editors or conversion strategy found
	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:391)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1287)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1248)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1008)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:470)
	... 29 more
Caused by: java.lang.IllegalArgumentException: Cannot convert value of type [$Proxy29] to required type [org.fao.fenix.persistence.perspective.TableDao] for property 'tableDao': no matching editors or conversion strategy found
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:219)
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:138)
	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:386)
	... 33 more

This is my configuration:

	<bean id="autoproxy" class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />


	<!--  
		The created cache manager is an instance of net.sf.ehcache.CacheManager
	-->
	<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"></bean>

	<bean id="cacheProviderFacade" class="org.springmodules.cache.provider.ehcache.EhCacheFacade">
		<property name="cacheManager" ref="cacheManager" />
	</bean>


	<bean id="cachingAttributeSource" class="org.springmodules.cache.annotations.AnnotationCachingAttributeSource">
	</bean>



	<bean id="cachingInterceptor" class="org.springmodules.cache.interceptor.caching.MetadataCachingInterceptor">
		<property name="cacheProviderFacade" ref="cacheProviderFacade" />
		<property name="cachingAttributeSource" ref="cachingAttributeSource" />
		<property name="cachingModels">
			<props>
				<prop key="fenixCaching">cacheName=fenixCache</prop>
			</props>
		</property>
	</bean>

	<bean id="cachingAttributeSourceAdvisor"
		class="org.springmodules.cache.interceptor.caching.CachingAttributeSourceAdvisor">
		<constructor-arg ref="cachingInterceptor" />
	</bean>

	<bean id="flushingAttributeSource" class="org.springmodules.cache.annotations.AnnotationFlushingAttributeSource">
	</bean>

	<bean id="flushingInterceptor" class="org.springmodules.cache.interceptor.flush.MetadataFlushingInterceptor">
		<property name="cacheProviderFacade" ref="cacheProviderFacade" />
		<property name="flushingAttributeSource" ref="flushingAttributeSource" />
		<property name="flushingModels">
			<props>
				<prop key="fenixCacheFlushing">cacheNames=fenixCache</prop>
			</props>
		</property>
	</bean>

	<bean id="flushingAttributeSourceAdvisor"
		class="org.springmodules.cache.interceptor.flush.FlushingAttributeSourceAdvisor">
		<constructor-arg ref="flushingInterceptor" />
	</bean>

What am I doing wrong? Or is this just a bug in Spring or in Spring-modules?

I have the idea that TableDao is already proxied because of its @PersistenceContext. Is that a problem? TableDao does not have an interface. Could that be a problem?

[erikvaningen]

I found the bug. There was a bean implementation declared to another bean instead of being declared via an interface.

I used the interface instead and all is fine now.

[nagula_sai]

Hi,

I had the same problem I resolved it By
seting
<tx:annotation ..
proxy-target-class = "true"/>