spring学习之源码分析--AbstractBeanFactory

AbstractBeanFactory

AbstractBeanFactory抽象类，继承了FactoryBeanRegistrySupport及实现了ConfigurableBeanFactory接口。

类结构

字段

// 父类容器
private BeanFactory parentBeanFactory;
// 类加载器
private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();
// 临时加载器
private ClassLoader tempClassLoader;
// bean的元数据缓存
private boolean cacheBeanMetadata = true;
// bean的表达式解析器
private BeanExpressionResolver beanExpressionResolver;
// 类型转换器
private ConversionService conversionService;
// 属性编辑器
private final Set propertyEditorRegistrars = new LinkedHashSet<>(4);
// 类的属性编辑器
private final Map, Class> customEditors = new HashMap<>(4);
// 类型转换器
private TypeConverter typeConverter;
// 为嵌入的值(如注释属性)添加字符串解析器
private final List embeddedValueResolvers = new CopyOnWriteArrayList<>();
// 后置处理器
private final List beanPostProcessors = new CopyOnWriteArrayList<>();
// InstantiationAwareBeanPostProcessors是否已注册
private volatile boolean hasInstantiationAwareBeanPostProcessors;
// DestructionAwareBeanPostProcessors是否已注册
private volatile boolean hasDestructionAwareBeanPostProcessors;
// 作用域
private final Map scopes = new LinkedHashMap<>(8);
// 提供安全作用域
private SecurityContextProvider securityContextProvider;
// 合并后的BeanDefinition
private final Map mergedBeanDefinitions = new ConcurrentHashMap<>(256);
// bean实例是否已创建
private final Set alreadyCreated = Collections.newSetFromMap(new ConcurrentHashMap<>(256));
// 本地缓存，正在创建的多例bean。这边用本地线程，是因为其他线程创建bean与当前线程不冲突
private final ThreadLocal