import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Test
public void circleLeadsToException() throws Exception {
	MockHttpServletRequest request = new MockHttpServletRequest();
	RequestAttributes requestAttributes = new ServletRequestAttributes(request);
	RequestContextHolder.setRequestAttributes(requestAttributes);

	try {
		String name = "requestScopedObjectCircle1";
		assertNull(request.getAttribute(name));

		this.beanFactory.getBean(name);
		fail("Should have thrown BeanCreationException");
	}
	catch (BeanCreationException ex) {
		assertTrue(ex.contains(BeanCurrentlyInCreationException.class));
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Determine the bean type for the given FactoryBean definition, as far as possible.
 * Only called if there is no singleton instance registered for the target bean already.
 * <p>The default implementation creates the FactoryBean via {@code getBean}
 * to call its {@code getObjectType} method. Subclasses are encouraged to optimize
 * this, typically by just instantiating the FactoryBean but not populating it yet,
 * trying whether its {@code getObjectType} method already returns a type.
 * If no type found, a full FactoryBean creation as performed by this implementation
 * should be used as fallback.
 * @param beanName the name of the bean
 * @param mbd the merged bean definition for the bean
 * @return the type for the bean if determinable, or {@code null} else
 * @see org.springframework.beans.factory.FactoryBean#getObjectType()
 * @see #getBean(String)
 */
protected Class<?> getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) {
	if (!mbd.isSingleton()) {
		return null;
	}
	try {
		FactoryBean<?> factoryBean = doGetBean(FACTORY_BEAN_PREFIX + beanName, FactoryBean.class, null, true);
		return getTypeForFactoryBean(factoryBean);
	}
	catch (BeanCreationException ex) {
		if (ex instanceof BeanCurrentlyInCreationException) {
			if (logger.isDebugEnabled()) {
				logger.debug("Bean currently in creation on FactoryBean type check: " + ex);
			}
		}
		else {
			if (logger.isWarnEnabled()) {
				logger.warn("Bean creation exception on FactoryBean type check: " + ex);
			}
		}
		onSuppressedException(ex);
		return null;
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Override
protected FailureAnalysis analyze(Throwable rootFailure,
		BeanCurrentlyInCreationException cause) {
	List<String> beansInCycle = new ArrayList<String>();
	Throwable candidate = rootFailure;
	while (candidate != null) {
		if (candidate instanceof BeanCreationException) {
			BeanCreationException creationEx = (BeanCreationException) candidate;
			if (StringUtils.hasText(creationEx.getBeanName())) {
				beansInCycle
						.add(creationEx.getBeanName() + getDescription(creationEx));
			}
		}
		candidate = candidate.getCause();
	}
	StringBuilder message = new StringBuilder();
	int uniqueBeans = beansInCycle.size() - 1;
	message.append(
			String.format("There is a circular dependency between %s beans in the "
					+ "application context:%n", uniqueBeans));
	for (String bean : beansInCycle) {
		message.append(String.format("\t- %s%n", bean));
	}
	return new FailureAnalysis(message.toString(), null, cause);
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
public void testCircleLeadsToException() throws Exception {
	MockHttpServletRequest request = new MockHttpServletRequest();
	RequestAttributes requestAttributes = new ServletRequestAttributes(request);
	RequestContextHolder.setRequestAttributes(requestAttributes);

	try {
		String name = "requestScopedObjectCircle1";
		assertNull(request.getAttribute(name));
		this.beanFactory.getBean(name);
		fail("Should have thrown BeanCreationException");
	}
	catch (BeanCreationException ex) {
		// expected
		assertTrue(ex.contains(BeanCurrentlyInCreationException.class));
	}
	finally {
		RequestContextHolder.setRequestAttributes(null);
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Initialize the given PropertyEditorRegistry with the custom editors
 * that have been registered with this BeanFactory.
 * <p>To be called for BeanWrappers that will create and populate bean
 * instances, and for SimpleTypeConverter used for constructor argument
 * and factory method type conversion.
 * @param registry the PropertyEditorRegistry to initialize
 */
protected void registerCustomEditors(PropertyEditorRegistry registry) {
	PropertyEditorRegistrySupport registrySupport =
			(registry instanceof PropertyEditorRegistrySupport ? (PropertyEditorRegistrySupport) registry : null);
	if (registrySupport != null) {
		registrySupport.useConfigValueEditors();
	}
	if (!this.propertyEditorRegistrars.isEmpty()) {
		for (PropertyEditorRegistrar registrar : this.propertyEditorRegistrars) {
			try {
				registrar.registerCustomEditors(registry);
			}
			catch (BeanCreationException ex) {
				Throwable rootCause = ex.getMostSpecificCause();
				if (rootCause instanceof BeanCurrentlyInCreationException) {
					BeanCreationException bce = (BeanCreationException) rootCause;
					if (isCurrentlyInCreation(bce.getBeanName())) {
						if (logger.isDebugEnabled()) {
							logger.debug("PropertyEditorRegistrar [" + registrar.getClass().getName() +
									"] failed because it tried to obtain currently created bean '" +
									ex.getBeanName() + "': " + ex.getMessage());
						}
						onSuppressedException(ex);
						continue;
					}
				}
				throw ex;
			}
		}
	}
	if (!this.customEditors.isEmpty()) {
		for (Map.Entry<Class<?>, Class<? extends PropertyEditor>> entry : this.customEditors.entrySet()) {
			Class<?> requiredType = entry.getKey();
			Class<? extends PropertyEditor> editorClass = entry.getValue();
			registry.registerCustomEditor(requiredType, BeanUtils.instantiateClass(editorClass));
		}
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Callback before singleton creation.
 * <p>The default implementation register the singleton as currently in creation.
 * @param beanName the name of the singleton about to be created
 * @see #isSingletonCurrentlyInCreation
 */
protected void beforeSingletonCreation(String beanName) {
	if (!this.inCreationCheckExclusions.contains(beanName) &&
			!this.singletonsCurrentlyInCreation.add(beanName)) {
		throw new BeanCurrentlyInCreationException(beanName);
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Override
public <T> Map<String, T> getBeansOfType(Class<T> type, boolean includeNonSingletons, boolean allowEagerInit)
		throws BeansException {

	String[] beanNames = getBeanNamesForType(type, includeNonSingletons, allowEagerInit);
	Map<String, T> result = new LinkedHashMap<String, T>(beanNames.length);
	for (String beanName : beanNames) {
		try {
			result.put(beanName, getBean(beanName, type));
		}
		catch (BeanCreationException ex) {
			Throwable rootCause = ex.getMostSpecificCause();
			if (rootCause instanceof BeanCurrentlyInCreationException) {
				BeanCreationException bce = (BeanCreationException) rootCause;
				if (isCurrentlyInCreation(bce.getBeanName())) {
					if (this.logger.isDebugEnabled()) {
						this.logger.debug("Ignoring match to currently created bean '" + beanName + "': " +
								ex.getMessage());
					}
					onSuppressedException(ex);
					// Ignore: indicates a circular reference when autowiring constructors.
					// We want to find matches other than the currently created bean itself.
					continue;
				}
			}
			throw ex;
		}
	}
	return result;
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Test
public void testCircularReferencesWithNotAllowed() {
	DefaultListableBeanFactory xbf = new DefaultListableBeanFactory();
	xbf.setAllowCircularReferences(false);
	XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(xbf);
	reader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_NONE);
	reader.loadBeanDefinitions(REFTYPES_CONTEXT);
	try {
		xbf.getBean("jenny");
		fail("Should have thrown BeanCreationException");
	}
	catch (BeanCreationException ex) {
		assertTrue(ex.contains(BeanCurrentlyInCreationException.class));
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Test
public void testCircularReferencesWithWrapping() {
	DefaultListableBeanFactory xbf = new DefaultListableBeanFactory();
	XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(xbf);
	reader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_NONE);
	reader.loadBeanDefinitions(REFTYPES_CONTEXT);
	xbf.addBeanPostProcessor(new WrappingPostProcessor());
	try {
		xbf.getBean("jenny");
		fail("Should have thrown BeanCreationException");
	}
	catch (BeanCreationException ex) {
		assertTrue(ex.contains(BeanCurrentlyInCreationException.class));
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Determine the bean type for the given FactoryBean definition, as far as possible.
 * Only called if there is no singleton instance registered for the target bean already.
 * <p>The default implementation creates the FactoryBean via {@code getBean}
 * to call its {@code getObjectType} method. Subclasses are encouraged to optimize
 * this, typically by just instantiating the FactoryBean but not populating it yet,
 * trying whether its {@code getObjectType} method already returns a type.
 * If no type found, a full FactoryBean creation as performed by this implementation
 * should be used as fallback.
 * @param beanName the name of the bean
 * @param mbd the merged bean definition for the bean
 * @return the type for the bean if determinable, or {@code null} else
 * @see org.springframework.beans.factory.FactoryBean#getObjectType()
 * @see #getBean(String)
 */
protected Class<?> getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) {
	if (!mbd.isSingleton()) {
		return null;
	}
	try {
		FactoryBean<?> factoryBean = doGetBean(FACTORY_BEAN_PREFIX + beanName, FactoryBean.class, null, true);
		return getTypeForFactoryBean(factoryBean);
	}
	catch (BeanCreationException ex) {
		if (ex instanceof BeanCurrentlyInCreationException) {
			if (logger.isDebugEnabled()) {
				logger.debug("Bean currently in creation on FactoryBean type check: " + ex);
			}
		}
		else if (mbd.isLazyInit()) {
			if (logger.isDebugEnabled()) {
				logger.debug("Bean creation exception on lazy FactoryBean type check: " + ex);
			}
		}
		else {
			if (logger.isWarnEnabled()) {
				logger.warn("Bean creation exception on non-lazy FactoryBean type check: " + ex);
			}
		}
		onSuppressedException(ex);
		return null;
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
public <T> Map<String, T> getBeansOfType(Class<T> type, boolean includeNonSingletons, boolean allowEagerInit)
		throws BeansException {

	String[] beanNames = getBeanNamesForType(type, includeNonSingletons, allowEagerInit);
	Map<String, T> result = new LinkedHashMap<String, T>(beanNames.length);
	for (String beanName : beanNames) {
		try {
			result.put(beanName, getBean(beanName, type));
		}
		catch (BeanCreationException ex) {
			Throwable rootCause = ex.getMostSpecificCause();
			if (rootCause instanceof BeanCurrentlyInCreationException) {
				BeanCreationException bce = (BeanCreationException) rootCause;
				if (isCurrentlyInCreation(bce.getBeanName())) {
					if (this.logger.isDebugEnabled()) {
						this.logger.debug("Ignoring match to currently created bean '" + beanName + "': " +
								ex.getMessage());
					}
					onSuppressedException(ex);
					// Ignore: indicates a circular reference when autowiring constructors.
					// We want to find matches other than the currently created bean itself.
					continue;
				}
			}
			throw ex;
		}
	}
	return result;
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Callback before singleton creation.
 * <p>Default implementation register the singleton as currently in creation.
 * @param beanName the name of the singleton about to be created
 * @see #isSingletonCurrentlyInCreation
 */
protected void beforeSingletonCreation(String beanName) {
	if (!this.inCreationCheckExclusions.containsKey(beanName) &&
			this.singletonsCurrentlyInCreation.put(beanName, Boolean.TRUE) != null) {
		throw new BeanCurrentlyInCreationException(beanName);
	}
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Override
   public <T> Map<String, T> getBeansOfType(Class<T> type, boolean includeNonSingletons, boolean allowEagerInit)
		throws BeansException {

	String[] beanNames = getBeanNamesForType(type, includeNonSingletons, allowEagerInit);
	Map<String, T> result = new LinkedHashMap<String, T>(beanNames.length);
	for (String beanName : beanNames) {
		try {
			result.put(beanName, getBean(beanName, type));
		}
		catch (BeanCreationException ex) {
			Throwable rootCause = ex.getMostSpecificCause();
			if (rootCause instanceof BeanCurrentlyInCreationException) {
				BeanCreationException bce = (BeanCreationException) rootCause;
				if (isCurrentlyInCreation(bce.getBeanName())) {
					if (this.logger.isDebugEnabled()) {
						this.logger.debug("Ignoring match to currently created bean '" + beanName + "': " +
								ex.getMessage());
					}
					onSuppressedException(ex);
					// Ignore: indicates a circular reference when autowiring constructors.
					// We want to find matches other than the currently created bean itself.
					continue;
				}
			}
			throw ex;
		}
	}
	return result;
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Override
public Class<?> predictBeanType(Class<?> beanClass, String beanName) {
	// We only apply special treatment to ScriptFactory implementations here.
	if (!ScriptFactory.class.isAssignableFrom(beanClass)) {
		return null;
	}

	BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);

	try {
		String scriptFactoryBeanName = SCRIPT_FACTORY_NAME_PREFIX + beanName;
		String scriptedObjectBeanName = SCRIPTED_OBJECT_NAME_PREFIX + beanName;
		prepareScriptBeans(bd, scriptFactoryBeanName, scriptedObjectBeanName);

		ScriptFactory scriptFactory = this.scriptBeanFactory.getBean(scriptFactoryBeanName, ScriptFactory.class);
		ScriptSource scriptSource = getScriptSource(scriptFactoryBeanName, scriptFactory.getScriptSourceLocator());
		Class<?>[] interfaces = scriptFactory.getScriptInterfaces();

		Class<?> scriptedType = scriptFactory.getScriptedObjectType(scriptSource);
		if (scriptedType != null) {
			return scriptedType;
		}
		else if (!ObjectUtils.isEmpty(interfaces)) {
			return (interfaces.length == 1 ? interfaces[0] : createCompositeInterface(interfaces));
		}
		else {
			if (bd.isSingleton()) {
				Object bean = this.scriptBeanFactory.getBean(scriptedObjectBeanName);
				if (bean != null) {
					return bean.getClass();
				}
			}
		}
	}
	catch (Exception ex) {
		if (ex instanceof BeanCreationException
				&& ((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
			if (logger.isTraceEnabled()) {
				logger.trace("Could not determine scripted object type for bean '" + beanName + "': "
						+ ex.getMessage());
			}
		}
		else {
			if (logger.isDebugEnabled()) {
				logger.debug("Could not determine scripted object type for bean '" + beanName + "'", ex);
			}
		}
	}

	return null;
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Find all eligible Advisor beans in the current bean factory,
 * ignoring FactoryBeans and excluding beans that are currently in creation.
 * @return the list of {@link org.springframework.aop.Advisor} beans
 * @see #isEligibleBean
 */
public List<Advisor> findAdvisorBeans() {
	// Determine list of advisor bean names, if not cached already.
	String[] advisorNames = null;
	synchronized (this) {
		advisorNames = this.cachedAdvisorBeanNames;
		if (advisorNames == null) {
			// Do not initialize FactoryBeans here: We need to leave all regular beans
			// uninitialized to let the auto-proxy creator apply to them!
			advisorNames = BeanFactoryUtils.beanNamesForTypeIncludingAncestors(
					this.beanFactory, Advisor.class, true, false);
			this.cachedAdvisorBeanNames = advisorNames;
		}
	}
	if (advisorNames.length == 0) {
		return new LinkedList<Advisor>();
	}

	List<Advisor> advisors = new LinkedList<Advisor>();
	for (String name : advisorNames) {
		if (isEligibleBean(name)) {
			if (this.beanFactory.isCurrentlyInCreation(name)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Skipping currently created advisor '" + name + "'");
				}
			}
			else {
				try {
					advisors.add(this.beanFactory.getBean(name, Advisor.class));
				}
				catch (BeanCreationException ex) {
					Throwable rootCause = ex.getMostSpecificCause();
					if (rootCause instanceof BeanCurrentlyInCreationException) {
						BeanCreationException bce = (BeanCreationException) rootCause;
						if (this.beanFactory.isCurrentlyInCreation(bce.getBeanName())) {
							if (logger.isDebugEnabled()) {
								logger.debug("Skipping advisor '" + name +
										"' with dependency on currently created bean: " + ex.getMessage());
							}
							// Ignore: indicates a reference back to the bean we're trying to advise.
							// We want to find advisors other than the currently created bean itself.
							continue;
						}
					}
					throw ex;
				}
			}
		}
	}
	return advisors;
}
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
@Override
   public Class<?> predictBeanType(Class<?> beanClass, String beanName) {
// We only apply special treatment to ScriptFactory implementations
// here.
if (!ScriptFactory.class.isAssignableFrom(beanClass)) {
    return null;
}

BeanDefinition bd = this.beanFactory.getMergedBeanDefinition(beanName);

try {
    String scriptFactoryBeanName = SCRIPT_FACTORY_NAME_PREFIX + beanName;
    String scriptedObjectBeanName = SCRIPTED_OBJECT_NAME_PREFIX + beanName;
    prepareScriptBeans(bd, scriptFactoryBeanName, scriptedObjectBeanName);

    ScriptFactory scriptFactory = this.scriptBeanFactory.getBean(scriptFactoryBeanName, ScriptFactory.class);
    ScriptSource scriptSource = getScriptSource(scriptFactoryBeanName, scriptFactory.getScriptSourceLocator());
    Class<?>[] interfaces = scriptFactory.getScriptInterfaces();

    Class<?> scriptedType = scriptFactory.getScriptedObjectType(scriptSource);
    if (scriptedType != null) {
	return scriptedType;
    } else if (!ObjectUtils.isEmpty(interfaces)) {
	return (interfaces.length == 1 ? interfaces[0] : createCompositeInterface(interfaces));
    } else {
	if (bd.isSingleton()) {
	    Object bean = this.scriptBeanFactory.getBean(scriptedObjectBeanName);
	    if (bean != null) {
		return bean.getClass();
	    }
	}
    }
} catch (Exception ex) {
    if (ex instanceof BeanCreationException && ((BeanCreationException) ex)
	    .getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
	if (logger.isTraceEnabled()) {
	    logger.trace(
		    "Could not determine scripted object type for bean '" + beanName + "': " + ex.getMessage());
	}
    } else {
	if (logger.isDebugEnabled()) {
	    logger.debug("Could not determine scripted object type for bean '" + beanName + "'", ex);
	}
    }
}

return null;
   }
 

import org.springframework.beans.factory.BeanCurrentlyInCreationException; //导入依赖的package包/类
/**
 * Callback before singleton creation.
 * <p>The default implementation register the singleton as currently in creation.
 * @param beanName the name of the singleton about to be created
 * @see #isSingletonCurrentlyInCreation
 */
protected void beforeSingletonCreation(String beanName) {
	if (!this.inCreationCheckExclusions.contains(beanName) && !this.singletonsCurrentlyInCreation.add(beanName)) {
		throw new BeanCurrentlyInCreationException(beanName);
	}
}