1.创建Environment
new StandardEnvironment()
createEnvironment:346, AbstractApplicationContext (org.springframework.context.support)
getEnvironment:332, AbstractApplicationContext (org.springframework.context.support)
resolvePath:131, AbstractRefreshableConfigApplicationContext (org.springframework.context.support)
setConfigLocations:86, AbstractRefreshableConfigApplicationContext (org.springframework.context.support)
<init>:148, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:98, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:15, MyClassPathXmlApplicationContext (com.mashibing)
main:80, Test (com.mashibing)
String[] configLocations赋值:
2.META-INF/spring.schemas文件加载
loadBeanDefinitions:86, AbstractXmlApplicationContext (org.springframework.context.support)
refreshBeanFactory:138, AbstractRefreshableApplicationContext (org.springframework.context.support)
obtainFreshBeanFactory:718, AbstractApplicationContext (org.springframework.context.support)
refresh:577, AbstractApplicationContext (org.springframework.context.support)
<init>:150, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:98, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:15, MyClassPathXmlApplicationContext (com.mashibing)
main:80, Test (com.mashibing)
protected void loadBeanDefinitions(DefaultListableBeanFactory beanFactory/*默认的可列表Bean工厂*/) throws BeansException, IOException {
// Create a new XmlBeanDefinitionReader for the given BeanFactory.
// 创建一个xml的beanDefinitionReader，并通过回调设置到beanFactory中
XmlBeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader(beanFactory);//Xml Bean定义阅读器
// Configure the bean definition reader with this context's
// resource loading environment.
// 使用此上下文的资源加载环境配置bean定义读取器。
// 给reader对象设置环境对象
beanDefinitionReader.setEnvironment(this.getEnvironment());
beanDefinitionReader.setResourceLoader(this);//ResourceEntityResolver的父类构造方法super执行给schemaResolver赋值 new PluggableSchemaResolver(classLoader);
beanDefinitionReader.setEntityResolver(new ResourceEntityResolver(this));//在PluggableSchemaResolver读取加载spring-beans/META-INF/spring.schemas
//指定http约束在本地对应的文件路径 断网写xml也有提示 映射存放于schemaMappings字段
// Allow a subclass to provide custom initialization of the reader,
// then proceed with actually loading the bean definitions.
//允许子类提供阅读器的自定义初始化，然后继续实际加载bean定义。
// 初始化beanDefinitionReader对象，此处设置配置文件是否要进行验证
initBeanDefinitionReader(beanDefinitionReader);
// 开始完成beanDefinition的加载
loadBeanDefinitions(beanDefinitionReader);
}
beanDefinitionReader.setEntityResolver(new ResourceEntityResolver(this));//在PluggableSchemaResolver读取加载spring-beans/META-INF/spring.schemas
public PluggableSchemaResolver(@Nullable ClassLoader classLoader) {
this.classLoader = classLoader;
//DEFAULT_SCHEMA_MAPPINGS_LOCATION = "META-INF/spring.schemas";
this.schemaMappingsLocation = DEFAULT_SCHEMA_MAPPINGS_LOCATION;
}
这里是引用
http\://www.springframework.org/schema/beans/spring-beans-2.0.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-2.5.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-3.0.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-3.1.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-3.2.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-4.0.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-4.1.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-4.2.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans-4.3.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/beans/spring-beans.xsd=org/springframework/beans/factory/xml/spring-beans.xsd http\://www.springframework.org/schema/tool/spring-tool-2.0.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-2.5.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-3.0.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-3.1.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-3.2.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-4.0.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-4.1.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-4.2.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool-4.3.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/tool/spring-tool.xsd=org/springframework/beans/factory/xml/spring-tool.xsd http\://www.springframework.org/schema/util/spring-util-2.0.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-2.5.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-3.0.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-3.1.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-3.2.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-4.0.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-4.1.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-4.2.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util-4.3.xsd=org/springframework/beans/factory/xml/spring-util.xsd http\://www.springframework.org/schema/util/spring-util.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/beans/spring-beans-2.0.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-2.5.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-3.0.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-3.1.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-3.2.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-4.0.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-4.1.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-4.2.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans-4.3.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/beans/spring-beans.xsd=org/springframework/beans/factory/xml/spring-beans.xsd https\://www.springframework.org/schema/tool/spring-tool-2.0.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-2.5.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-3.0.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-3.1.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-3.2.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-4.0.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-4.1.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-4.2.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool-4.3.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/tool/spring-tool.xsd=org/springframework/beans/factory/xml/spring-tool.xsd https\://www.springframework.org/schema/util/spring-util-2.0.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-2.5.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-3.0.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-3.1.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-3.2.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-4.0.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-4.1.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-4.2.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util-4.3.xsd=org/springframework/beans/factory/xml/spring-util.xsd https\://www.springframework.org/schema/util/spring-util.xsd=org/springframework/beans/factory/xml/spring-util.xsd
PluggableSchemaResolver类的getSchemaMappings方法读取上面的http和本地的xsd映射文件，没网在写xml也会有提示的：
private Map<String, String> getSchemaMappings() {
Map<String, String> schemaMappings = this.schemaMappings;//模式映射
if (schemaMappings == null) {
synchronized (this) {
schemaMappings = this.schemaMappings;
if (schemaMappings == null) {
if (logger.isTraceEnabled()) {
logger.trace("Loading schema mappings from [" + this.schemaMappingsLocation + "]");
}
try {
Properties mappings =
PropertiesLoaderUtils.loadAllProperties(this.schemaMappingsLocation, this.classLoader);
if (logger.isTraceEnabled()) {
logger.trace("Loaded schema mappings: " + mappings);
}
schemaMappings = new ConcurrentHashMap<>(mappings.size());
CollectionUtils.mergePropertiesIntoMap(mappings, schemaMappings);
this.schemaMappings = schemaMappings;
}
catch (IOException ex) {
throw new IllegalStateException(
"Unable to load schema mappings from location [" + this.schemaMappingsLocation + "]", ex);
}
}
}
}
return schemaMappings;
}
在idea用debug运行会调用类的toString方法去打印输出类信息，这里是toString方法调用getSchemaMappings最终会映射到this.schemaMappings;
public String toString() {
return "EntityResolver using schema mappings " + getSchemaMappings();
}
this.schemaResolver = new PluggableSchemaResolver(classLoader);执行结束之后:
3.META-INF/spring.handlers加载
registerBeanDefinitions:526, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
doLoadBeanDefinitions:397, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:341, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:310, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:190, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:234, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:197, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:267, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:150, AbstractXmlApplicationContext (org.springframework.context.support)
loadBeanDefinitions:102, AbstractXmlApplicationContext (org.springframework.context.support)
refreshBeanFactory:138, AbstractRefreshableApplicationContext (org.springframework.context.support)
obtainFreshBeanFactory:718, AbstractApplicationContext (org.springframework.context.support)
refresh:577, AbstractApplicationContext (org.springframework.context.support)
<init>:150, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:98, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:15, MyClassPathXmlApplicationContext (com.mashibing)
main:80, Test (com.mashibing)
/**
* 注册给定DOM文档中包含的bean定义。
* Register the bean definitions contained in the given DOM document.
* 由{@code loadBeanDefinitions}调用。
* Called by {@code loadBeanDefinitions}.
* 创建解析器类的新实例并调用
* <p>Creates a new instance of the parser class and invokes
* {@code registerBeanDefinitions} on it.
* @param doc the DOM document
* @param resource the resource descriptor (for context information) 资源描述符(用于上下文信息)
* @return the number of bean definitions found
* @throws BeanDefinitionStoreException in case of parsing errors
* @see #loadBeanDefinitions
* @see #setDocumentReaderClass
* @see BeanDefinitionDocumentReader#registerBeanDefinitions
*/
public int registerBeanDefinitions(Document doc, Resource resource) throws BeanDefinitionStoreException {
// 对xml的beanDefinition进行解析
BeanDefinitionDocumentReader documentReader = createBeanDefinitionDocumentReader();
int countBefore = getRegistry().getBeanDefinitionCount();
// 完成具体的解析过程
documentReader.registerBeanDefinitions(doc, createReaderContext(resource));//createReaderContext(resource) 读取"META-INF/spring.handlers" 存储从名称空间URI到NamespaceHandler类名称实例的映射 handlerMappings
return getRegistry().getBeanDefinitionCount() - countBefore;
}
在执行createReaderContext方法
documentReader.registerBeanDefinitions(doc, createReaderContext(resource));//createReaderContext(resource) 读取"META-INF/spring.handlers" 存储从名称空间URI到NamespaceHandler类名称实例的映射 handlerMappings
public XmlReaderContext createReaderContext(Resource resource) {
return new XmlReaderContext(resource, this.problemReporter, this.eventListener,
this.sourceExtractor, this, getNamespaceHandlerResolver());
}
getNamespaceHandlerResolver方法内部:
public NamespaceHandlerResolver getNamespaceHandlerResolver() {
if (this.namespaceHandlerResolver == null) {
this.namespaceHandlerResolver = createDefaultNamespaceHandlerResolver();
}
return this.namespaceHandlerResolver;
}
protected NamespaceHandlerResolver createDefaultNamespaceHandlerResolver() {
ClassLoader cl = (getResourceLoader() != null ? getResourceLoader().getClassLoader() : getBeanClassLoader());
return new DefaultNamespaceHandlerResolver(cl);
}
public DefaultNamespaceHandlerResolver(@Nullable ClassLoader classLoader) {
this(classLoader, DEFAULT_HANDLER_MAPPINGS_LOCATION);
DEFAULT_HANDLER_MAPPINGS_LOCATION = "META-INF/spring.handlers";
}
DefaultNamespaceHandlerResolver这个类在debug下:调用toString给handlerMappings 赋值
@Override
public String toString() {
return "NamespaceHandlerResolver using mappings " + getHandlerMappings();
}
toString调用getHandlerMappings加载META-INF/spring.handlers
private Map<String, Object> getHandlerMappings() {
Map<String, Object> handlerMappings = this.handlerMappings;
// 如果没有被缓存，则开始进行缓存
if (handlerMappings == null) {
synchronized (this) {
handlerMappings = this.handlerMappings;
if (handlerMappings == null) {
if (logger.isTraceEnabled()) {
logger.trace("Loading NamespaceHandler mappings from [" + this.handlerMappingsLocation + "]");
}
try {
// this.handlerMappingsLocation在构造函数中已经被初始化为META-INF/Spring.handlers
Properties mappings =
PropertiesLoaderUtils.loadAllProperties(this.handlerMappingsLocation, this.classLoader);
if (logger.isTraceEnabled()) {
logger.trace("Loaded NamespaceHandler mappings: " + mappings);
}
handlerMappings = new ConcurrentHashMap<>(mappings.size());
// 将properties格式文件合并到map格式的handlerMapping中
CollectionUtils.mergePropertiesIntoMap(mappings, handlerMappings);
this.handlerMappings = handlerMappings;
}
catch (IOException ex) {
throw new IllegalStateException(
"Unable to load NamespaceHandler mappings from location [" + this.handlerMappingsLocation + "]", ex);
}
}
}
}
return handlerMappings;
}
getNamespaceHandlerResolver执行结束之后:
4.解析xml文件转为BeanDefinitionHolder
parseBeanDefinitions:171, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
doRegisterBeanDefinitions:150, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
registerBeanDefinitions:97, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
registerBeanDefinitions:526, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
doLoadBeanDefinitions:397, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:341, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:310, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:190, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:234, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:197, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:267, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:150, AbstractXmlApplicationContext (org.springframework.context.support)
loadBeanDefinitions:102, AbstractXmlApplicationContext (org.springframework.context.support)
refreshBeanFactory:138, AbstractRefreshableApplicationContext (org.springframework.context.support)
obtainFreshBeanFactory:718, AbstractApplicationContext (org.springframework.context.support)
refresh:577, AbstractApplicationContext (org.springframework.context.support)
<init>:150, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:98, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:15, MyClassPathXmlApplicationContext (com.mashibing)
main:80, Test (com.mashibing)
delegate.isDefaultNamespace(ele)判断BEANS_NAMESPACE_URI = "http://www.springframework.org/schema/beans"来确定是自定义标签还是默认
protected void parseBeanDefinitions(Element root, BeanDefinitionParserDelegate delegate) {
if (delegate.isDefaultNamespace(root)) {
NodeList nl = root.getChildNodes();
for (int i = 0; i < nl.getLength(); i++) {
Node node = nl.item(i);
if (node instanceof Element) {
Element ele = (Element) node;
if () {
parseDefaultElement(ele, delegate);
}
else {
delegate.parseCustomElement(ele);
}
}
}
}
else {
delegate.parseCustomElement(root);
}
}
默认走parseDefaultElement(ele, delegate);，自定义走delegate.parseCustomElement(ele);
private void parseDefaultElement(Element ele, BeanDefinitionParserDelegate delegate) {
if (delegate.nodeNameEquals(ele, IMPORT_ELEMENT)) {//import
importBeanDefinitionResource(ele);
}
else if (delegate.nodeNameEquals(ele, ALIAS_ELEMENT)) {//alias
processAliasRegistration(ele);
}
else if (delegate.nodeNameEquals(ele, BEAN_ELEMENT)) {//bean
processBeanDefinition(ele, delegate);
}
else if (delegate.nodeNameEquals(ele, NESTED_BEANS_ELEMENT)) {//beans
// recurse
doRegisterBeanDefinitions(ele);
}
}
processBeanDefinition(ele, delegate);解析bean为例:
/**
* 处理给定的bean元素，解析bean定义并将其注册到注册中心。
* Process the given bean element, parsing the bean definition
* and registering it with the registry.
*/
protected void processBeanDefinition(Element ele, BeanDefinitionParserDelegate delegate) {
// beanDefinitionHolder是beanDefinition对象的封装类，封装了BeanDefinition，bean的名字和别名，用它来完成向IOC容器的注册
// 得到这个beanDefinitionHolder就意味着beandefinition是通过BeanDefinitionParserDelegate对xml元素的信息按照spring的bean规则进行
// 解析得到的
BeanDefinitionHolder bdHolder = delegate.parseBeanDefinitionElement(ele);
if (bdHolder != null) {
bdHolder = delegate.decorateBeanDefinitionIfRequired(ele, bdHolder);
try {
// Register the final decorated instance.
// 向ioc容器注册解析得到的beandefinition的地方
BeanDefinitionReaderUtils.registerBeanDefinition(bdHolder, getReaderContext().getRegistry());
}
catch (BeanDefinitionStoreException ex) {
getReaderContext().error("Failed to register bean definition with name '" +
bdHolder.getBeanName() + "'", ele, ex);
}
// Send registration event.
// 在beandefinition向ioc容器注册完成之后，发送消息
getReaderContext().fireComponentRegistered(new BeanComponentDefinition(bdHolder));
}
}
parseBeanDefinitionElement调用后续:
parseBeanDefinitionElement:421, BeanDefinitionParserDelegate (org.springframework.beans.factory.xml)
parseBeanDefinitionElement:410, BeanDefinitionParserDelegate (org.springframework.beans.factory.xml)
processBeanDefinition:326, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
parseDefaultElement:199, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
parseBeanDefinitions:178, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
doRegisterBeanDefinitions:150, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
registerBeanDefinitions:97, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
registerBeanDefinitions:526, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
doLoadBeanDefinitions:397, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:341, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:310, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:190, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:234, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:197, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:267, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:150, AbstractXmlApplicationContext (org.springframework.context.support)
loadBeanDefinitions:102, AbstractXmlApplicationContext (org.springframework.context.support)
refreshBeanFactory:138, AbstractRefreshableApplicationContext (org.springframework.context.support)
obtainFreshBeanFactory:718, AbstractApplicationContext (org.springframework.context.support)
refresh:577, AbstractApplicationContext (org.springframework.context.support)
<init>:150, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:98, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:15, MyClassPathXmlApplicationContext (com.mashibing)
main:80, Test (com.mashibing)
public BeanDefinitionHolder parseBeanDefinitionElement(Element ele, @Nullable BeanDefinition containingBean) {
// 解析id属性
String id = ele.getAttribute(ID_ATTRIBUTE);
// 解析name属性
String nameAttr = ele.getAttribute(NAME_ATTRIBUTE);
// 如果bean有别名的话，那么将别名分割解析
List<String> aliases = new ArrayList<>();
if (StringUtils.hasLength(nameAttr)) {
String[] nameArr = StringUtils.tokenizeToStringArray(nameAttr, MULTI_VALUE_ATTRIBUTE_DELIMITERS);
aliases.addAll(Arrays.asList(nameArr));
}
String beanName = id;
if (!StringUtils.hasText(beanName) && !aliases.isEmpty()) {
beanName = aliases.remove(0);
if (logger.isTraceEnabled()) {
logger.trace("No XML 'id' specified - using '" + beanName +
"' as bean name and " + aliases + " as aliases");
}
}
if (containingBean == null) {
checkNameUniqueness(beanName, aliases, ele);
}
// 对bean元素的详细解析
AbstractBeanDefinition beanDefinition = parseBeanDefinitionElement(ele, beanName, containingBean);
if (beanDefinition != null) {
if (!StringUtils.hasText(beanName)) {
try {
// 如果不存在beanname，那么根据spring中提供的命名规则为当前bean生成对应的beanName
if (containingBean != null) {
beanName = BeanDefinitionReaderUtils.generateBeanName(
beanDefinition, this.readerContext.getRegistry(), true);
}
else {
beanName = this.readerContext.generateBeanName(beanDefinition);
// Register an alias for the plain bean class name, if still possible,
// if the generator returned the class name plus a suffix.
// This is expected for Spring 1.2/2.0 backwards compatibility.
String beanClassName = beanDefinition.getBeanClassName();
if (beanClassName != null &&
beanName.startsWith(beanClassName) && beanName.length() > beanClassName.length() &&
!this.readerContext.getRegistry().isBeanNameInUse(beanClassName)) {
aliases.add(beanClassName);
}
}
if (logger.isTraceEnabled()) {
logger.trace("Neither XML 'id' nor 'name' specified - " +
"using generated bean name [" + beanName + "]");
}
}
catch (Exception ex) {
error(ex.getMessage(), ele);
return null;
}
}
String[] aliasesArray = StringUtils.toStringArray(aliases);
return new BeanDefinitionHolder(beanDefinition, beanName, aliasesArray);
}
return null;
}
解析bean标签的id,name,class,parent等元素封装为bean定义信息返回；
delegate.parseBeanDefinitionElement(ele);执行结束之后返回:
重要的来了:调用
// 向ioc容器注册解析得到的beandefinition的地方
BeanDefinitionReaderUtils.registerBeanDefinition(bdHolder, getReaderContext().getRegistry());
registerBeanDefinition:1108, DefaultListableBeanFactory (org.springframework.beans.factory.support)
registerBeanDefinition:178, BeanDefinitionReaderUtils (org.springframework.beans.factory.support)
processBeanDefinition:332, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
parseDefaultElement:199, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
parseBeanDefinitions:178, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
doRegisterBeanDefinitions:150, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
registerBeanDefinitions:97, DefaultBeanDefinitionDocumentReader (org.springframework.beans.factory.xml)
registerBeanDefinitions:526, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
doLoadBeanDefinitions:397, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:341, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:310, XmlBeanDefinitionReader (org.springframework.beans.factory.xml)
loadBeanDefinitions:190, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:234, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:197, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:267, AbstractBeanDefinitionReader (org.springframework.beans.factory.support)
loadBeanDefinitions:150, AbstractXmlApplicationContext (org.springframework.context.support)
loadBeanDefinitions:102, AbstractXmlApplicationContext (org.springframework.context.support)
refreshBeanFactory:138, AbstractRefreshableApplicationContext (org.springframework.context.support)
obtainFreshBeanFactory:718, AbstractApplicationContext (org.springframework.context.support)
refresh:577, AbstractApplicationContext (org.springframework.context.support)
<init>:150, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:98, ClassPathXmlApplicationContext (org.springframework.context.support)
<init>:15, MyClassPathXmlApplicationContext (com.mashibing)
main:80, Test (com.mashibing)
@Override
public void registerBeanDefinition(String beanName, BeanDefinition beanDefinition)
throws BeanDefinitionStoreException {
Assert.hasText(beanName, "Bean name must not be empty");
Assert.notNull(beanDefinition, "BeanDefinition must not be null");
if (beanDefinition instanceof AbstractBeanDefinition) {
try {
// 注册前的最后一个校验，这里的检验不同于之前的xml文件校验，主要是对应abstractBeanDefinition属性的methodOverrides校验，
// 检验methodOverrides是否与工厂方法并存或者methodoverrides对应的方法根本不存在
((AbstractBeanDefinition) beanDefinition).validate();
}
catch (BeanDefinitionValidationException ex) {
throw new BeanDefinitionStoreException(beanDefinition.getResourceDescription(), beanName,
"Validation of bean definition failed", ex);
}
}
BeanDefinition existingDefinition = this.beanDefinitionMap.get(beanName);
// 处理注册已经注册的beanName情况
if (existingDefinition != null) {
// 如果对应的beanName已经注册且在配置中配置了bean不允许被覆盖，则抛出异常
if (!isAllowBeanDefinitionOverriding()) {
throw new BeanDefinitionOverrideException(beanName, beanDefinition, existingDefinition);
}
else if (existingDefinition.getRole() < beanDefinition.getRole()) {
// e.g. was ROLE_APPLICATION, now overriding with ROLE_SUPPORT or ROLE_INFRASTRUCTURE
if (logger.isInfoEnabled()) {
logger.info("Overriding user-defined bean definition for bean '" + beanName +
"' with a framework-generated bean definition: replacing [" +
existingDefinition + "] with [" + beanDefinition + "]");
}
}
else if (!beanDefinition.equals(existingDefinition)) {
if (logger.isDebugEnabled()) {
logger.debug("Overriding bean definition for bean '" + beanName +
"' with a different definition: replacing [" + existingDefinition +
"] with [" + beanDefinition + "]");
}
}
else {
if (logger.isTraceEnabled()) {
logger.trace("Overriding bean definition for bean '" + beanName +
"' with an equivalent definition: replacing [" + existingDefinition +
"] with [" + beanDefinition + "]");
}
}
this.beanDefinitionMap.put(beanName, beanDefinition);
}
else {
if (hasBeanCreationStarted()) {
// Cannot modify startup-time collection elements anymore (for stable iteration) 不能再修改启动时集合元素(为了稳定迭代)
synchronized (this.beanDefinitionMap) {
this.beanDefinitionMap.put(beanName, beanDefinition);
List<String> updatedDefinitions = new ArrayList<>(this.beanDefinitionNames.size() + 1);
updatedDefinitions.addAll(this.beanDefinitionNames);
updatedDefinitions.add(beanName);
this.beanDefinitionNames = updatedDefinitions;
removeManualSingletonName(beanName);
}
}
else {
// Still in startup registration phase
// 注册beanDefinition
this.beanDefinitionMap.put(beanName, beanDefinition);
// 记录beanName
this.beanDefinitionNames.add(beanName);
//更新工厂的内部手工单例名称集。
removeManualSingletonName(beanName);
}
this.frozenBeanDefinitionNames = null;
}
if (existingDefinition != null || containsSingleton(beanName)) {
// 重置所有beanName对应的缓存
resetBeanDefinition(beanName);
}
else if (isConfigurationFrozen()) {
//除关于按类型映射的任何假设。
clearByTypeCache();
}
}
private final Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<>(256);
private volatile List beanDefinitionNames = new ArrayList<>(256);
这两个属性有值了，就是刚刚加载的bean标签定义信息
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