@Bean cannot be used on static factory methods but error message does not inform of you of that [SPR-7628]

[spring-projects-issues]

Keith Donald opened SPR-7628 and commented

The following error was displayed in my case:

@Bean
@Scope(value="request", proxyMode=ScopedProxyMode.INTERFACES)
public static TwitterOperations twitterApi(AccountProvider<TwitterOperations> twitterAccountProvider,
    @Value("#{request.getAttribute('account')}") Account account) {
    return twitterAccountProvider.getApi(accountId(account));
}

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'twitterApi' defined in BeanDefinition defined in class path resource [com/springsource/greenhouse/config/AccountProvidersApiConfiguration.class]: Initialization of bean failed; nested exception is java.lang.IllegalStateException: Cannot create scoped proxy for bean 'scopedTarget.twitterApi': Target type could not be determined at the time of proxy creation.
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
	at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
	at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3391)
	at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:426)
	at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
	at java.lang.Thread.run(Thread.java:637)
Caused by: java.lang.IllegalStateException: Cannot create scoped proxy for bean 'scopedTarget.twitterApi': Target type could not be determined at the time of proxy creation.
	at org.springframework.aop.scope.ScopedProxyFactoryBean.setBeanFactory(ScopedProxyFactoryBean.java:94)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1439)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1408)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
	... 21 more

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Affects: 3.0.4

Referenced from: commits 0610632