Spring源码分析【4】-Spring扫描basePackages注解

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org.springframework.beans.factory.support.DefaultListableBeanFactory

重要数据结构

/** Map of bean definition objects, keyed by bean name */
	private final Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<String, BeanDefinition>(256);

RootConfig 代码

@Configuration
@Import(MybatisConfig.class)
@ComponentScan(basePackages = {"com.xxx.*"},
        excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)})
public class RootConfig {
}

org.springframework.context.annotation. ComponentScanAnnotationParser.parse

org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan

org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents

org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.resolveBasePackage

org.springframework.util.ClassUtils.convertClassNameToResourcePath

getResources

getResources

findPathMatchingResources

determineRootDir

回到findPathMatchingResources

findPathMatchingResources的result

一直退回到findCandidateComponents

MetadataReader metadataReader = this.metadataReaderFactory.getMetadataReader(resource);

MetadataReader

if (isCandidateComponent(metadataReader))

ScannedGenericBeanDefinition

回到findCandidateComponents

return candidates;

返回doScan

checkCandidate

回doScan

BeanDefinitionHolder

beanDefinitions.add(definitionHolder);

registerBeanDefinition

registerBeanDefinition

oldBeanDefinition = this.beanDefinitionMap.get(beanName);

if (hasBeanCreationStarted()) 

this.beanDefinitionMap.put(beanName, beanDefinition);

updatedDefinitions

doScan return beanDefinitions;

org.springframework.context.annotation.ComponentScanAnnotationParser.parse

org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass

parse

org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass

this.configurationClasses.put(configClass, configClass);

回到doProcessConfigurationClass

for (SourceClass ifc : sourceClass.getInterfaces()) {

doProcessConfigurationClass

// No superclass -> processing is complete

return null;

processConfigurationClass

org.springframework.context.annotation.ConfigurationClassParser.parse

parse

org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions

alreadyParsed.addAll(configClasses);

alreadyParsedClasses

invokeBeanDefinitionRegistryPostProcessors

org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors

// Now, invoke the postProcessBeanFactory callback of all processors handled so far.
			invokeBeanFactoryPostProcessors(registryPostProcessors, beanFactory);
			invokeBeanFactoryPostProcessors(regularPostProcessors, beanFactory);

postProcessorNames

refresh