fuzhengwei/small-spring
Small Spring
Small-Spring 是一个简化的 Java Spring 框架实现，旨在研究控制反转 (IoC) 容器和依赖注入框架的内部架构。它作为一个 Bean 容器，通过自动实例化和属性注入来管理对象生命周期并解析依赖关系。
该项目实现了使用动态代理拦截方法调用的机制，以支持面向切面编程 (AOP)。它通过包装目标对象来修改方法执行，从而将横切关注点与业务逻辑分离。
该系统涵盖了通过类路径扫描进行组件发现以及加载外部资源（包括 XML 配置解析）。它还包括应用上下文管理、Bean 作用域控制，以及基于观察者模式的事件分发系统，用于处理系统事件和生命周期钩子。
Features
- Dependency Injection Frameworks - Implements a full dependency injection framework that automatically manages object creation and resolves component dependencies.
- Dependency Injection - Implements a core dependency injection system to decouple software components through automated wiring.
- Java Component Containers - Functions as a Java component container that handles the creation and management of singleton and prototype scoped objects.
- Classpath Component Scanners - Provides automatic discovery and registration of managed beans by scanning the classpath for annotations.
- Annotation-Based Component Scanning - Automatically detects and registers classes as managed beans by scanning packages for annotations.
- Aspect-Oriented Programming - Implements techniques for modularizing cross-cutting concerns by intercepting method calls.
- Aspect-Oriented Programming Frameworks - Implements a system for modularizing cross-cutting concerns using dynamic proxies and interceptors.
- Object Lifecycle Management - Controls the creation, registration, and destruction of objects to decouple instantiation from usage.
- Inversion-of-Control Containers - Provides an inversion-of-control container that manages bean lifecycles and resolves dependencies through automated instantiation.
- Singleton Instance Sharing - Manages a central map of singleton instances to ensure shared object access across the dependency graph.
- Dependency Injection Population - Uses Java reflection and metadata to automatically populate object properties with their required dependencies.
- Method Interception Proxies - Uses dynamic proxies to intercept method calls, allowing the injection of custom behavior.
- Spring Bean Contexts - Coordinates resource loading and object recognition within a managed bean application context.
- External Configuration Loading - Provides mechanisms to load external configuration files for component discovery and registration.
- Hook Registration - Implements a registration mechanism for executing custom logic during object initialization and destruction.
- Framework Architecture Studies - Provides a simplified implementation of the Spring framework as a resource for studying IoC and DI internals.
- Framework Implementation Studies - Provides a simplified implementation of the Spring framework specifically designed for studying the internals of IoC and DI containers.
- Bean Scope Definitions - Defines how objects are instantiated and shared using scope definitions and factory patterns.
- Initialization and Shutdown Hooks - Provides initialization and shutdown hooks to trigger specific methods during the application lifecycle.
- Event Triggering - Implements mechanisms for programmatically firing events to notify registered listeners within the container.
- Container Event Observers - Implements an observer-pattern event dispatcher to notify listeners of internal system events.
- XML Configurations - Supports the use of external XML files to define object relationships and application settings.
- Java Frameworks - A simplified implementation of the Spring framework for learning.
