Java Code Examples for org.springframework.beans.factory.config.ConfigurableBeanFactory#setCurrentlyInCreation()

private Object resolveBeanReference(Method beanMethod, Object[] beanMethodArgs,
		ConfigurableBeanFactory beanFactory, String beanName) {

	// The user (i.e. not the factory) is requesting this bean through a call to
	// the bean method, direct or indirect. The bean may have already been marked
	// as 'in creation' in certain autowiring scenarios; if so, temporarily set
	// the in-creation status to false in order to avoid an exception.
	boolean alreadyInCreation = beanFactory.isCurrentlyInCreation(beanName);
	try {
		if (alreadyInCreation) {
			beanFactory.setCurrentlyInCreation(beanName, false);
		}
		boolean useArgs = !ObjectUtils.isEmpty(beanMethodArgs);
		if (useArgs && beanFactory.isSingleton(beanName)) {
			// Stubbed null arguments just for reference purposes,
			// expecting them to be autowired for regular singleton references?
			// A safe assumption since @Bean singleton arguments cannot be optional...
			for (Object arg : beanMethodArgs) {
				if (arg == null) {
					useArgs = false;
					break;
				}
			}
		}
		Object beanInstance = (useArgs ? beanFactory.getBean(beanName, beanMethodArgs) :
				beanFactory.getBean(beanName));
		if (!ClassUtils.isAssignableValue(beanMethod.getReturnType(), beanInstance)) {
			// Detect package-protected NullBean instance through equals(null) check
			if (beanInstance.equals(null)) {
				if (logger.isDebugEnabled()) {
					logger.debug(String.format("@Bean method %s.%s called as bean reference " +
							"for type [%s] returned null bean; resolving to null value.",
							beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName(),
							beanMethod.getReturnType().getName()));
				}
				beanInstance = null;
			}
			else {
				String msg = String.format("@Bean method %s.%s called as bean reference " +
						"for type [%s] but overridden by non-compatible bean instance of type [%s].",
						beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName(),
						beanMethod.getReturnType().getName(), beanInstance.getClass().getName());
				try {
					BeanDefinition beanDefinition = beanFactory.getMergedBeanDefinition(beanName);
					msg += " Overriding bean of same name declared in: " + beanDefinition.getResourceDescription();
				}
				catch (NoSuchBeanDefinitionException ex) {
					// Ignore - simply no detailed message then.
				}
				throw new IllegalStateException(msg);
			}
		}
		Method currentlyInvoked = SimpleInstantiationStrategy.getCurrentlyInvokedFactoryMethod();
		if (currentlyInvoked != null) {
			String outerBeanName = BeanAnnotationHelper.determineBeanNameFor(currentlyInvoked);
			beanFactory.registerDependentBean(beanName, outerBeanName);
		}
		return beanInstance;
	}
	finally {
		if (alreadyInCreation) {
			beanFactory.setCurrentlyInCreation(beanName, true);
		}
	}
}
 

private Object resolveBeanReference(Method beanMethod, Object[] beanMethodArgs,
		ConfigurableBeanFactory beanFactory, String beanName) {

	// The user (i.e. not the factory) is requesting this bean through a call to
	// the bean method, direct or indirect. The bean may have already been marked
	// as 'in creation' in certain autowiring scenarios; if so, temporarily set
	// the in-creation status to false in order to avoid an exception.
	boolean alreadyInCreation = beanFactory.isCurrentlyInCreation(beanName);
	try {
		if (alreadyInCreation) {
			beanFactory.setCurrentlyInCreation(beanName, false);
		}
		boolean useArgs = !ObjectUtils.isEmpty(beanMethodArgs);
		if (useArgs && beanFactory.isSingleton(beanName)) {
			// Stubbed null arguments just for reference purposes,
			// expecting them to be autowired for regular singleton references?
			// A safe assumption since @Bean singleton arguments cannot be optional...
			for (Object arg : beanMethodArgs) {
				if (arg == null) {
					useArgs = false;
					break;
				}
			}
		}
		Object beanInstance = (useArgs ? beanFactory.getBean(beanName, beanMethodArgs) :
				beanFactory.getBean(beanName));
		if (!ClassUtils.isAssignableValue(beanMethod.getReturnType(), beanInstance)) {
			// Detect package-protected NullBean instance through equals(null) check
			if (beanInstance.equals(null)) {
				if (logger.isDebugEnabled()) {
					logger.debug(String.format("@Bean method %s.%s called as bean reference " +
							"for type [%s] returned null bean; resolving to null value.",
							beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName(),
							beanMethod.getReturnType().getName()));
				}
				beanInstance = null;
			}
			else {
				String msg = String.format("@Bean method %s.%s called as bean reference " +
						"for type [%s] but overridden by non-compatible bean instance of type [%s].",
						beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName(),
						beanMethod.getReturnType().getName(), beanInstance.getClass().getName());
				try {
					BeanDefinition beanDefinition = beanFactory.getMergedBeanDefinition(beanName);
					msg += " Overriding bean of same name declared in: " + beanDefinition.getResourceDescription();
				}
				catch (NoSuchBeanDefinitionException ex) {
					// Ignore - simply no detailed message then.
				}
				throw new IllegalStateException(msg);
			}
		}
		Method currentlyInvoked = SimpleInstantiationStrategy.getCurrentlyInvokedFactoryMethod();
		if (currentlyInvoked != null) {
			String outerBeanName = BeanAnnotationHelper.determineBeanNameFor(currentlyInvoked);
			beanFactory.registerDependentBean(beanName, outerBeanName);
		}
		return beanInstance;
	}
	finally {
		if (alreadyInCreation) {
			beanFactory.setCurrentlyInCreation(beanName, true);
		}
	}
}
 

private Object obtainBeanInstanceFromFactory(Method beanMethod, Object[] beanMethodArgs,
		ConfigurableBeanFactory beanFactory, String beanName) {

	// The user (i.e. not the factory) is requesting this bean through a call to
	// the bean method, direct or indirect. The bean may have already been marked
	// as 'in creation' in certain autowiring scenarios; if so, temporarily set
	// the in-creation status to false in order to avoid an exception.
	boolean alreadyInCreation = beanFactory.isCurrentlyInCreation(beanName);
	try {
		if (alreadyInCreation) {
			beanFactory.setCurrentlyInCreation(beanName, false);
		}
		boolean useArgs = !ObjectUtils.isEmpty(beanMethodArgs);
		if (useArgs && beanFactory.isSingleton(beanName)) {
			// Stubbed null arguments just for reference purposes,
			// expecting them to be autowired for regular singleton references?
			// A safe assumption since @Bean singleton arguments cannot be optional...
			for (Object arg : beanMethodArgs) {
				if (arg == null) {
					useArgs = false;
					break;
				}
			}
		}
		Object beanInstance = (useArgs ? beanFactory.getBean(beanName, beanMethodArgs) :
				beanFactory.getBean(beanName));
		if (beanInstance != null && !ClassUtils.isAssignableValue(beanMethod.getReturnType(), beanInstance)) {
			String msg = String.format("@Bean method %s.%s called as a bean reference " +
						"for type [%s] but overridden by non-compatible bean instance of type [%s].",
						beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName(),
						beanMethod.getReturnType().getName(), beanInstance.getClass().getName());
			try {
				BeanDefinition beanDefinition = beanFactory.getMergedBeanDefinition(beanName);
				msg += " Overriding bean of same name declared in: " + beanDefinition.getResourceDescription();
			}
			catch (NoSuchBeanDefinitionException ex) {
				// Ignore - simply no detailed message then.
			}
			throw new IllegalStateException(msg);
		}
		Method currentlyInvoked = SimpleInstantiationStrategy.getCurrentlyInvokedFactoryMethod();
		if (currentlyInvoked != null) {
			String outerBeanName = BeanAnnotationHelper.determineBeanNameFor(currentlyInvoked);
			beanFactory.registerDependentBean(beanName, outerBeanName);
		}
		return beanInstance;
	}
	finally {
		if (alreadyInCreation) {
			beanFactory.setCurrentlyInCreation(beanName, true);
		}
	}
}
 

/**
 * Enhance a {@link Bean @Bean} method to check the supplied BeanFactory for the
 * existence of this bean object.
 * @throws Throwable as a catch-all for any exception that may be thrown when invoking the
 * super implementation of the proxied method i.e., the actual {@code @Bean} method
 */
@Override
public Object intercept(Object enhancedConfigInstance, Method beanMethod, Object[] beanMethodArgs,
			MethodProxy cglibMethodProxy) throws Throwable {

	ConfigurableBeanFactory beanFactory = getBeanFactory(enhancedConfigInstance);
	String beanName = BeanAnnotationHelper.determineBeanNameFor(beanMethod);

	// Determine whether this bean is a scoped-proxy
	Scope scope = AnnotationUtils.findAnnotation(beanMethod, Scope.class);
	if (scope != null && scope.proxyMode() != ScopedProxyMode.NO) {
		String scopedBeanName = ScopedProxyCreator.getTargetBeanName(beanName);
		if (beanFactory.isCurrentlyInCreation(scopedBeanName)) {
			beanName = scopedBeanName;
		}
	}

	// To handle the case of an inter-bean method reference, we must explicitly check the
	// container for already cached instances.

	// First, check to see if the requested bean is a FactoryBean. If so, create a subclass
	// proxy that intercepts calls to getObject() and returns any cached bean instance.
	// This ensures that the semantics of calling a FactoryBean from within @Bean methods
	// is the same as that of referring to a FactoryBean within XML. See SPR-6602.
	if (factoryContainsBean(beanFactory, BeanFactory.FACTORY_BEAN_PREFIX + beanName) &&
			factoryContainsBean(beanFactory, beanName)) {
		Object factoryBean = beanFactory.getBean(BeanFactory.FACTORY_BEAN_PREFIX + beanName);
		if (factoryBean instanceof ScopedProxyFactoryBean) {
			// Pass through - scoped proxy factory beans are a special case and should not
			// be further proxied
		}
		else {
			// It is a candidate FactoryBean - go ahead with enhancement
			return enhanceFactoryBean(factoryBean, beanFactory, beanName);
		}
	}

	if (isCurrentlyInvokedFactoryMethod(beanMethod)) {
		// The factory is calling the bean method in order to instantiate and register the bean
		// (i.e. via a getBean() call) -> invoke the super implementation of the method to actually
		// create the bean instance.
		if (BeanFactoryPostProcessor.class.isAssignableFrom(beanMethod.getReturnType())) {
			logger.warn(String.format("@Bean method %s.%s is non-static and returns an object " +
					"assignable to Spring's BeanFactoryPostProcessor interface. This will " +
					"result in a failure to process annotations such as @Autowired, " +
					"@Resource and @PostConstruct within the method's declaring " +
					"@Configuration class. Add the 'static' modifier to this method to avoid " +
					"these container lifecycle issues; see @Bean javadoc for complete details.",
					beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName()));
		}
		return cglibMethodProxy.invokeSuper(enhancedConfigInstance, beanMethodArgs);
	}
	else {
		// The user (i.e. not the factory) is requesting this bean through a
		// call to the bean method, direct or indirect. The bean may have already been
		// marked as 'in creation' in certain autowiring scenarios; if so, temporarily
		// set the in-creation status to false in order to avoid an exception.
		boolean alreadyInCreation = beanFactory.isCurrentlyInCreation(beanName);
		try {
			if (alreadyInCreation) {
				beanFactory.setCurrentlyInCreation(beanName, false);
			}
			Object beanInstance = (!ObjectUtils.isEmpty(beanMethodArgs) ?
					beanFactory.getBean(beanName, beanMethodArgs) : beanFactory.getBean(beanName));
			if (beanInstance != null && !ClassUtils.isAssignableValue(beanMethod.getReturnType(), beanInstance)) {
				String msg = String.format("@Bean method %s.%s called as a bean reference " +
							"for type [%s] but overridden by non-compatible bean instance of type [%s].",
							beanMethod.getDeclaringClass().getSimpleName(), beanMethod.getName(),
							beanMethod.getReturnType().getName(), beanInstance.getClass().getName());
				try {
					BeanDefinition beanDefinition = beanFactory.getMergedBeanDefinition(beanName);
					msg += " Overriding bean of same name declared in: " + beanDefinition.getResourceDescription();
				}
				catch (NoSuchBeanDefinitionException ex) {
					// Ignore - simply no detailed message then.
				}
				throw new IllegalStateException(msg);
			}
			return beanInstance;
		}
		finally {
			if (alreadyInCreation) {
				beanFactory.setCurrentlyInCreation(beanName, true);
			}
		}
	}
}