How to get prototype from ProxyFactoryBean ?

Hello all,

first of all I would like to say I am a beginner in spring, so maybe I am asking basic thing, but I am really stuck in my problem.

Used components: Spring 1.2.8, Hibernate 3.2.0 cr1, tomcat, struts, java 6

I am trying to get bean from ProxyFactoryBean with scope = prototype. I am not successful. I have no clue what is wrong.

Here is context:

<beans>

<bean id="ruleCheckTask" class="rulechecker.RuleCheckTask" singleton="false">

<bean id="ruleCheckTaskPrototype" class="org.springframework.aop.target.PrototypeTar getSource">
<property name="targetBeanName" value="ruleCheckTask" />
</bean>

<bean id="transactionInterceptorRuleCheckTask"
class="org.springframework.transaction.interceptor .TransactionInterceptor">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="transactionAttributeSource">
<value>
rulechecker.IRuleCheckTask.run=PROPAGATION_REQUIRE S_NEW
</value>
</property>
</bean>

<bean id="ruleCheckTaskService" class="org.springframework.aop.framework.ProxyFact oryBean">
<property name="target" ref="ruleCheckTaskPrototype" />
<property name="proxyInterfaces">
<value>
rulechecker.IRuleCheckTask
</value>
</property>
<property name="interceptorNames">
<list>
<value>transactionInterceptorRuleCheckTask</value>
</list>
</property>
</bean>
</beans>


In code when I do following:

...................
...................
IRuleCheckTask checkTask = (IRuleCheckTask) applicationContext.getBean("ruleCheckTaskService") ;
checkTask.setTestCase(oneTestCase);

I got following exception when trying call setTestCase on checkTask bean:

java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoi npointUsingReflection(AopUtils.java:287)
at org.springframework.aop.framework.ReflectiveMethod Invocation.invokeJoinpoint(ReflectiveMethodInvocat ion.java:181)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :148)
at org.springframework.transaction.interceptor.Transa ctionInterceptor.invoke(TransactionInterceptor.jav a:96)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :170)
at org.springframework.aop.framework.JdkDynamicAopPro xy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy21.setTestCase(Unknown Source)

It was working if in ProxyFactoryBean I used ruleCheckTask instead ruleCheckTaskPrototype. Problem is that in that case I always obtain singleton of ruleCheckTask. And I need always new instance.
One small thing RuleCheckTask implements Runnable interface.

Could anybody give me a hint?

Thank you

Here is the solution

<bean id="ruleCheckTaskService" class="org.springframework.aop.framework.ProxyFact oryBean">
<property name="targetName" value="ruleCheckTask" />
<property name="singleton" value="false" />
<property name="proxyInterfaces">
<value>
rulechecker.IRuleCheckTask
</value>
</property>
<property name="interceptorNames">
<list>
<value>transactionInterceptorRuleCheckTask</value>
</list>
</property>
</bean>


I was making 2 basic mistakes. I put singleton property directory into declaration <bean singleton=false>, and then I got exception, that ProxyFactoryBean has to be singleton. And second mistake from my side was, I specified target through property "target" and "ref" instead of "targetName" and "value". What a small details and they are important.