使用Micronaut的Java泛型类依赖注入

Question

在Micronaut中尝试java泛型类的依赖注入

接口

public interface IRequestHandler<C, R> {
    R handler(C c);
}

依赖注入

@Singleton
public record ServiceBus(IRequestHandler<C, R> iRequestHandler) implements IServiceBus{

    @Override
    public <C, R> R send(C c) {
        return iRequestHandler.handler(c);
    }
}

接口

public interface IServiceBus {
    <C,R> R send(C c);
}

实施

public class ProductController {
    public ProductController(IServiceBus iRequestHandler){
        _iserviceBus= iRequestHandler;
    }
     public Mono<?> get(ProductSearchCriteriaCommand searchCriteria) {
            var item = _iserviceBus.<CreateProductCommand,CreateProductCommand>send(new CreateProductCommand());
            return null;
        }
}

对我来说，问题是在ServiceBus类上，我如何传递公共记录ServiceBus的类型

@Singleton
public class CreateProductCommandHandler implements IRequestHandler<CreateProductCommand, CreateProductCommand> {
    @Override
    public CreateProductCommand handler(CreateProductCommand createProductCommand) {
        return null;
    }
}

@Singleton
public record DeleteProductCommandHandler() implements IRequestHandler<DeleteProductCommand,DeleteProductCommand> {

    @Override
    public DeleteProductCommand handler(DeleteProductCommand deleteProductCommand) {
        return null;
    }
}

当我呼叫iserviceBus时。

同样，如果我调用iserviceBus。

Answer 1

您错误地定义了IServiceBus接口：

public interface IServiceBus {
    <C,R> R send(C c);
}

应该是：

public interface IServiceBus<C,R> {
    R send(C c);
}