Introduction

We know that IOC(Inversion of Control) is an effective architectural design for system decoupling, and is also a supporting tool for the development of large-scale business systems

IOC Containers

There are two types of ioc containers in Vona:

1. app container: During system initialization, a unique global bean container will be automatically created. Bean instances created in this container are all singleton mode
2. ctx container: When requests coming, the system will create a bean container for each of them

Bean Class

Vona adopts a modular system, and Bean Classes are provided by different modules

Injection Scope

Vona provides the following injection scopes:

1. app: Inject in the app container
2. ctx: Inject in the ctx container
3. new: Always create a new bean instance

Injection method

Vona provides two injection methods:

1. Dependency injection: Provides attribute-based dependency injection through the @Use decorator
2. Dependency lookup: Directly lookup the required bean instance through the ioc container, and automatically create it if it does not exist