Inversify Inject Decoration

I'm already using Inversify in Cocos project.

1. Performance Optimization
_ Lazy Loading: lazyInject allows for lazy loading of dependencies, which means thay are only instantiated when they are actually needed. This can significantly improve the performance of your application, especially if some dependencies are expensive to create and might not be used in every execution path.
_ Reduced Initialization Time: By deferring the creation of dependencies until they are accessed, the initial loading time of the application can be reduced.

2. Memory Management
_ Efficient Use of Resources: Since dependencies are only created when required, it helps in better memory management and resource utilization. This can be particularly useful in applications with large numbers of dependencies or those that run in environments with limited resources.

3. Circular Dependency Resolution
_ Avoid Circular Dependencies: lazyInject can help in resolving circular dependencies by delaying the injection until the dependencies are actually needed. This can prevent issues where two or more services depend on each other, causing a circular dependency error during initialization.

4. Better Control and Flexibility
_ Fine-Grained Control: With lazyInject, developers have more control over when and how dependencies are instantiated. This can lead to better optimization and flexibility in managing dependencies.
_ Conditional Instantiation: It allows for conditional instantiation of dependencies based on runtime conditions, which can lead to more efficient and context-aware dependency management.

5. Best Practices in Dependency Injection
_ Adherence to SOLID Principles: Using lazyInject aligns the Dependency Inversion Principle (DIP) and the Single Responsibility Principle (SRP), both of which are part of the SOLID principles of object-oriented design. It ensures that classes depend on abstractions rather than concrete implementations and that they are only responsible for their primary functionality.
_ Separation of Concerns: By using lazyInject, you maintain a clear separation of concerns. The class that depends on a service doesn't need to know how to create it, only how to use it.

import { injectable, inject } from "inversify";
import { lazyInject } from "inversify/lib/annotation/lazy_inject";

@injectable()
class SomeService {
    // ...
}

@injectable()
class AnotherService {
    @lazyInject(TYPES.SomeService)
    private someService: SomeService;

    public doSomething() {
        this.someService.someMethod();
    }
}