BeanFactory creation process
One, get the BeanFactory sub-process
The timing diagram is as follows
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Two, BeanDefinition loading analysis and registration sub-process
1. This sub-process involves the following key steps
Resource positioning : refers to BeanDefinitionthe right resource positioning process. Generally speaking, it is to find Javabeanthe XML file that defines the information and encapsulate it into a Resource object .
BeanDefinition loading : The user-defined data structure is Javabeanrepresented as the internal data structure of the IoC containerBeanDefinition .
Register BeanDefinition to the IoC container
2. Process analysis
1 the STEP : sub-process entry AbstractRefreshableApplicationContext#refreshBeanFactorymethod in
the Step 2 : turn call more than one class of loadBeanDefinitions method -> AbstractXmlApplicationContext-> AbstractBeanDefinitionReader-> XmlBeanDefinitionReaderperformed until XmlBeanDefinitionReaderthe doLoadBeanDefinitions method of
the Step 3 : We focus on observation XmlBeanDefinitionReaderclass registerBeanDefinitions method produces during heavy load times call, we locate the last
here we focus on two areas: a createRederContext method , it is a DefaultBeanDefinitionDocumentReaderclass of registerBeanDefinitions method , first enter createRederContext method look
we can see that here Spring finished first NamespaceHandlerResolverinitialization.
We then enter the registerBeanDefinitions method to track and call the DefaultBeanDefinitionDocumentReader#registerBeanDefinitions method.
Enter the doRegisterBeanDefinitions method.
Enter the parseBeanDefinitions method.
Enter the parseDefaultElement method.
Enter the processBeanDefinition method.
At this point, the registration process is over. BeanDefinitionafter the object into a Map, BeanFactorybased on Mapthe structural organization of these BeanDefinitionare.
You can DefaultListableBeanFactorysee the definition of this Map in
/** Map of bean definition objects, keyed by bean name. */
private final Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<>(256);
3. Timing diagram
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