Spring source study notes 1

1. The two core classes in Spring

1)DefaultListableBeanFactory

　　XmlBeanFactory inherits from DefaultListableBeanFactory, DefaultListableBeanFactory is the core part of the entire bean loading, and is the default implementation of Spring loading and registering beans

2)XmlBeanDefinitionReader

2. Sample code

BeanFactory bf=new XmlBeanFactory(new ClassPathResource("beanFactoryTest.xml"));

XmlBeanFactory.class
public class XmlBeanFactory extends DefaultListableBeanFactory {
    private final XmlBeanDefinitionReader reader;

    public XmlBeanFactory(Resource resource) throws BeansException {
        this(resource, (BeanFactory)null);
    }

    public XmlBeanFactory(Resource resource, BeanFactory parentBeanFactory) throws BeansException {
        super(parentBeanFactory);
        this.reader = new XmlBeanDefinitionReader(this);
        this.reader.loadBeanDefinitions(resource);
    }
}

public int loadBeanDefinitions(Resource resource) throws BeanDefinitionStoreException {
    return this.loadBeanDefinitions(new EncodedResource(resource));
}

public int loadBeanDefinitions(EncodedResource encodedResource){
....　　
　　InputSource inputSource = new InputSource(inputStream);//通过SAX方式解析XML文件
....
　　this.doLoadBeanDefinitions(inputSource, encodedResource.getResource());

}

3. Encapsulation of configuration files

Resource implements InputStreamResource

4.AbstractAutowireCapableBeanFactory.ignoreDependencyInterface()

Ignore autowiring for a given interface

5. Load Beans

protected int doLoadBeanDefinitions(InputSource inputSource, Resource resource) throws BeanDefinitionStoreException {
        try {
            int validationMode = this.getValidationModeForResource(resource);//获取xml文件的验证模式
            Document doc = this.documentLoader.loadDocument(inputSource, this.getEntityResolver(), this.errorHandler, validationMode, this.isNamespaceAware());//加载XML文件
            return this.registerBeanDefinitions(doc, resource);// Return registered bean information 
        } catch (BeanDefinitionStoreException var5) {
             throw var5;
        } catch (SAXParseException var6) {
            throw new XmlBeanDefinitionStoreException(resource.getDescription(), "Line " + var6.getLineNumber() + " in XML document from " + resource + " is invalid", var6);
        } catch (SAXException var7) {
            throw new XmlBeanDefinitionStoreException(resource.getDescription(), "XML document from " + resource + " is invalid", var7);
        } catch (ParserConfigurationException var8) {
            throw new BeanDefinitionStoreException(resource.getDescription(), "Parser configuration exception parsing XML from " + resource, var8);
        } catch (IOException var9) {
            throw new BeanDefinitionStoreException(resource.getDescription(), "IOException parsing XML document from " + resource, var9);
        } catch (Throwable var10) {
            throw new BeanDefinitionStoreException(resource.getDescription(), "Unexpected exception parsing XML document from " + resource, var10);
        }
    }

1) Get the validation mode of the xml file

2) Load the XML file

3) Return the information of the registered bean

Spring source study notes 1

Guess you like