Spring AOP Help

[Phoenix Kilimba]

Dear Sirs et Madames,
I am experiencing a few issues in regards to using Spring AOP.

Currently the application runs with no exceptions , but in order to achieve what I need to achieve, I have to define an aspect in my applicationContext.xml file. However, as soon as I introduce the following element:

  
    <aop:config> 

    </aop:config>  

I get the following error stack trace:

2010-05-04 18:32:48.044::WARN:  Failed startup of context org.mortbay.jetty.plugin.Jetty6PluginWebAppContext@542acf{/openhds,C:\Documents an
d Settings\Sir Tumaini Kilimba.TUMAINI\main-project\trunk\openhds-webapp\src\main\webapp}
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.config.http.UserDetails
ServiceInjectionBeanPostProcessor#0': Initialization of bean failed; nested exception is java.lang.ClassCastException: org.springframework.t
ransaction.annotation.AnnotationTransactionAttributeSource cannot be cast to org.openhds.dao.finder.FinderExecutor
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java
:519)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:4
50)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:683)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:401)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:261)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:192)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:540)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
        at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
        at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
        at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
        at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:110)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
        at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
        at org.mortbay.jetty.Server.doStart(Server.java:222)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
        at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:357)
        at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:293)
        at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:203)
        at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
        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.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: java.lang.ClassCastException: org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to o
rg.openhds.dao.finder.FinderExecutor
        at org.openhds.dao.finder.Interceptor.invoke(Interceptor.java:19)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
        at $Proxy6.getTransactionAttribute(Unknown Source)
        at org.springframework.transaction.interceptor.TransactionAttributeSourcePointcut.matches(TransactionAttributeSourcePointcut.java:36
)
        at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:215)
        at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:252)
        at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:284)
        at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCrea
tor.java:117)
        at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.
java:87)
        at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxy
Creator.java:68)
        at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:359)
        at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java
:322)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractA
utowireCapableBeanFactory.java:404)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.ja
va:1407)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java
:512)
        ... 49 more
2010-05-04 18:32:48.138::WARN:  Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.spring
framework.security.config.http.UserDetailsServiceInjectionBeanPostProcessor#0': Initialization of bean failed; nested exception is java.lang
.ClassCastException: org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to org.openhds.dao.finde
r.FinderExecutor:
java.lang.ClassCastException: org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to org.openhds.
dao.finder.FinderExecutor
        at org.openhds.dao.finder.Interceptor.invoke(Interceptor.java:19)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
        at $Proxy6.getTransactionAttribute(Unknown Source)
        at org.springframework.transaction.interceptor.TransactionAttributeSourcePointcut.matches(TransactionAttributeSourcePointcut.java:36
)
        at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:215)
        at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:252)
        at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:284)
        at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCrea
tor.java:117)
        at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.
java:87)
        at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxy
Creator.java:68)
        at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:359)
        at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java
:322)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractA
utowireCapableBeanFactory.java:404)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.ja
va:1407)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java
:512)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:4
50)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:683)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:401)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:261)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:192)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:540)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
        at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
        at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
        at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
        at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:110)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
        at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
        at org.mortbay.jetty.Server.doStart(Server.java:222)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
        at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
        at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:357)
        at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:293)
        at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:203)
        at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
        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.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
2010-05-04 18:32:49.278::INFO:  Started SelectChannelConnector@0.0.0.0:8080
[INFO] Started Jetty Server
   

Has anyone any idea why this may happen? The only change I have made so far is added those 2 lines
<aop:config>
</aop:config>

I have also imported the relevant namespaces for AOP ( I think ) like so:

    
      <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:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:lang="http://www.springframework.org/schema/lang" xmlns:security="http://www.springframework.org/schema/security"
       
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
       http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.0.xsd
       http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

      <!-- Loads of bean declarations, etc -->
     </beans>

can anyone please advise?
Thanks in advance.

[Nathan Pruett]

The base exception is here -

# 2010-05-04 18:32:48.138::WARN: Nested in org.springframework.beans.factory.BeanCreationException:
# Error creating bean with name 'org.springframework.security.config.http.UserDetailsServiceInjectionBeanPostProcessor#0':
# Initialization of bean failed; nested exception is java.lang.ClassCastException:
# org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to
# org.openhds.dao.finder.FinderExecutor: java.lang.ClassCastException:
# org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to
# org.openhds.dao.finder.FinderExecutor
# at org.openhds.dao.finder.Interceptor.invoke(Interceptor.java:19)

What's at org.openhds.dao.finder.Interceptor.invoke(Interceptor.java:19)?

What does the org.openhds.dao.finder.FinderExecutor class have in it?

[Hongli Li]

did you use @Aspect annotation? if you use aspect annotation you don't need to introduce the <aop/> tag in your configuration file.

[Phoenix Kilimba]

Nathan Pruett wrote:The base exception is here -

# 2010-05-04 18:32:48.138::WARN: Nested in org.springframework.beans.factory.BeanCreationException:
# Error creating bean with name 'org.springframework.security.config.http.UserDetailsServiceInjectionBeanPostProcessor#0':
# Initialization of bean failed; nested exception is java.lang.ClassCastException:
# org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to
# org.openhds.dao.finder.FinderExecutor: java.lang.ClassCastException:
# org.springframework.transaction.annotation.AnnotationTransactionAttributeSource cannot be cast to
# org.openhds.dao.finder.FinderExecutor
# at org.openhds.dao.finder.Interceptor.invoke(Interceptor.java:19)

What's at org.openhds.dao.finder.Interceptor.invoke(Interceptor.java:19)?

What does the org.openhds.dao.finder.FinderExecutor class have in it?

Well the Interceptor class is like so:

 
/**
 * Connects the Spring AOP magic with the Hibernate DAO magic. First, only
 * methods annotated with the <code>DynamicFinder</code> annotation are
 * considered. Depending on the result type, it delegates the method call to a
 * method that returns a <code>List</code> or an <code>Iterator</code>.
 */
public class Interceptor implements IntroductionInterceptor {

	public Object invoke(MethodInvocation methodInvocation) throws Throwable {

		FinderExecutor<?> executor = (FinderExecutor<?>) methodInvocation
				.getThis();

		Method finderMethod = methodInvocation.getMethod();
		DynamicFinder finderAnnotation = methodInvocation.getMethod()
				.getAnnotation(DynamicFinder.class);

		if (finderAnnotation == null)
			return methodInvocation.proceed();

		if (finderMethod.getReturnType() == List.class) {
			Object[] arguments = methodInvocation.getArguments();
			return executor.executeFinder(methodInvocation.getMethod(),
					arguments);
		} else {
			Object[] arguments = methodInvocation.getArguments();
			return executor.iterateFinder(methodInvocation.getMethod(),
					arguments);
		}

	}

	@SuppressWarnings("unchecked")
	public boolean implementsInterface(Class intf) {
		return intf.isInterface()
				&& FinderExecutor.class.isAssignableFrom(intf);
	}
}

 

And the FinderExecutor is like:

   
public interface FinderExecutor<T> {

	List<T> executeFinder(Method method, Object[] queryArgs);

	Iterator<T> iterateFinder(Method method, Object[] queryArgs);
}
 

Hope this helps. Thanks again