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POSpring Transaction - Proxy confusion
 

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    <pre><code> &lt;tx:advice id="txAdvice" transaction-manager="jtaTxManager"&gt; &lt;tx:attributes&gt; &lt;tx:method name="*" /&gt; &lt;/tx:attributes&gt; &lt;/tx:advice&gt; &lt;aop:config proxy-target-class="true"&gt; &lt;aop:pointcut id="fooServiceOperation" expression="execution(* x.y.SampClass.save(..))" /&gt; &lt;aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceOperation" /&gt; &lt;/aop:config&gt; &lt;bean id="Samp1" class=" x.y.SampClass"&gt;&lt;/bean&gt; &lt;bean id="SearchDispatchRpcGwtServlet" class="x.y.server.SearchDispatchRpcGwtServlet"&gt; &lt;constructor-arg&gt; &lt;list&gt; &lt;ref bean="webServiceClient"/&gt; &lt;/list&gt; &lt;/constructor-arg&gt; &lt;/bean&gt; &lt;!-- Service Clients --&gt; &lt;bean id="webServiceClient" class="x.y.KSBClientProxyFactoryBean"&gt; &lt;property name="serviceEndpointInterface" value="x.y.service.WebService" /&gt; &lt;property name="serviceQName" value="{http://x.y.org/wsdl/organization}WebService" /&gt; &lt;/bean&gt; </code></pre> <p>This is the part of sample spring context file. I am trying to create a transaction advice for <code>SampClass</code> to execute on the save method.</p> <p>So from my understanding it should create a proxy for <code>SampClass</code> only.</p> <p>I have a <code>SearchDispatchRpcGwtServlet</code> which takes as an argument a webservice Client which is also a proxy in itself. This bean is also getting proxied for some reason where it fails because it cannot create a proxy of a proxy.</p> <p>I must add that <code>SearchDispatchRpcGwtServlet</code> creates an instance of <code>SampClass</code> and calls the save method.</p> <p>I get the following exception:</p> <blockquote> <p>java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy118 at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer .java:446) at net.sf.cglib.transform.TransformingClassGenerator. generateClass(TransformingClassGenerator.java:33)</p> </blockquote> <p>I dont understand why <code>SearchDispatchRpcGwtServlet</code> proxy is getting created. Can someone explain. </p> <p>Addition Stack Trace</p> <pre><code>Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class $Proxy117]: 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 $Proxy117 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:473) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:348) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:309) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:361) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.postProcessObjectFromFactoryBean(AbstractAutowireCapableBeanFactory.java:1427) at org.springframework.beans.factory.support.FactoryBeanRegistrySupport$1.run(FactoryBeanRegistrySupport.java:139) ... 85 more Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy117 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) </code></pre>
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    1. PTQuestion
    1. USskaffman
    1. USnagl
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      1. VTUpMod
    1. COCan we see more of the stack trace? What you've given us isn't really enough.
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      1. USskaffman
    2. COI ll explain the issue in more detail. I have an aop pointcut defined for Bean A. I have Bean B defined after Bean A in the context file. From what i imagine only Bean A proxy should be created. But in this case Bean B proxy is also created which contains a webserivce client proxy as an arguement. Is this a valid behaviour. Can i do something to avoid this. Meaning aop whould proxy only the specified bean.
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      1. USnagl
    3. COI have added the stack trace
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      1. POSpring Transaction - Proxy confusion
      1. USnagl
 

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