Pros of Spring Framework

• More comprehensive ecosystem with extensive features beyond dependency injection
• Wider industry adoption and larger community support
• Better integration with enterprise Java technologies and frameworks

Cons of Spring Framework

• Steeper learning curve due to its extensive feature set
• Potentially heavier footprint for simpler applications
• More complex configuration and setup compared to Guice

Code Comparison

Spring Framework:

@Configuration
public class AppConfig {
    @Bean
    public MyService myService() {
        return new MyServiceImpl();
    }
}

Guice:

public class AppModule extends AbstractModule {
    @Override
    protected void configure() {
        bind(MyService.class).to(MyServiceImpl.class);
    }
}

Both frameworks provide dependency injection, but Spring offers a more declarative approach with annotations and XML configuration, while Guice focuses on programmatic binding. Spring's configuration tends to be more verbose but offers greater flexibility, whereas Guice aims for simplicity and minimal boilerplate code.

Spring Framework is better suited for large-scale enterprise applications with complex requirements, while Guice is often preferred for smaller projects or when a lightweight dependency injection solution is needed.

Pros of Autofac

• More flexible configuration options, including XML-based configuration
• Better support for .NET-specific features and integration with ASP.NET Core
• Stronger emphasis on modular architecture and assembly scanning

Cons of Autofac

• Steeper learning curve due to more complex API
• Slightly slower performance in some scenarios
• Less widespread adoption compared to Guice

Code Comparison

Autofac:

var builder = new ContainerBuilder();
builder.RegisterType<MyService>().As<IService>();
var container = builder.Build();
var service = container.Resolve<IService>();

Guice:

Injector injector = Guice.createInjector(new AbstractModule() {
    @Override
    protected void configure() {
        bind(IService.class).to(MyService.class);
    }
});
IService service = injector.getInstance(IService.class);

Key Differences

• Autofac is primarily for .NET ecosystems, while Guice is Java-focused
• Autofac offers more advanced features like decorators and interceptors
• Guice has a simpler API and is often considered more beginner-friendly
• Autofac provides better support for constructor injection and property injection
• Guice has stronger backing from Google and is used in many Google projects

Pros of Windsor

• More mature and feature-rich, with a longer history in the .NET ecosystem
• Supports advanced scenarios like interception and dynamic proxies out-of-the-box
• Offers a fluent API for registration, making configuration more readable

Cons of Windsor

• Steeper learning curve due to its extensive feature set
• Can be considered "heavyweight" for simpler projects
• Less active development and community engagement compared to Guice

Code Comparison

Windsor:

container.Register(Component.For<IService>().ImplementedBy<ServiceImpl>());

Guice:

bind(Service.class).to(ServiceImpl.class);

Both frameworks provide straightforward ways to bind interfaces to implementations, but Windsor's syntax is more verbose and offers more configuration options inline. Guice's syntax is more concise and follows a more minimalist approach, which can be easier for beginners but may require additional setup for complex scenarios.

Windsor excels in scenarios requiring advanced IoC features, while Guice is often preferred for its simplicity and tight integration with the Java ecosystem. The choice between them often depends on the specific needs of the project and the developer's familiarity with the respective ecosystems.

Pros of SimpleInjector

• Lightweight and fast performance
• Designed specifically for .NET, offering better integration with the ecosystem
• Extensive documentation and clear best practices

Cons of SimpleInjector

• Smaller community and ecosystem compared to Guice
• Less flexibility in configuration options
• Limited support for AOP (Aspect-Oriented Programming)

Code Comparison

SimpleInjector:

var container = new Container();
container.Register<IUserRepository, SqlUserRepository>();
container.Register<IUserService, UserService>();

var userService = container.GetInstance<IUserService>();

Guice:

public class AppModule extends AbstractModule {
    @Override
    protected void configure() {
        bind(IUserRepository.class).to(SqlUserRepository.class);
        bind(IUserService.class).to(UserService.class);
    }
}

Injector injector = Guice.createInjector(new AppModule());
IUserService userService = injector.getInstance(IUserService.class);

Both SimpleInjector and Guice provide dependency injection capabilities, but SimpleInjector is more focused on .NET development, while Guice is designed for Java applications. SimpleInjector offers a more straightforward API and better performance in .NET environments, whereas Guice provides more extensive configuration options and a larger ecosystem in the Java world.