[英]Spring WebFlux - Inconvertible types; cannot cast 'reactor.core.publisher.Mono'
I am using Spring Boot for my API.我正在为我的 API 使用 Spring 引导。 I am rewriting my API, to adopt the microservices architecture.我正在重写我的 API,以采用微服务架构。
I have 2 classes:我有 2 节课:
1) Product 1) 产品
2) Ingredient 2) 成分
My Code:我的代码:
Here is my Product class:这是我的产品class:
public class Product{
private String name;
@OneToMany
private List<Ingredient> productIngredients; //Ingredient
private Double quantity = 0.0;
private Double productCost = 0.0;
public void addIngredient(Ingredient myIngredient){
this.productComponents.add(myIngredient);
}
}
Here is my Ingredient class:这是我的成分class:
public class Ingredient{
private String name;
private String unit;
private Double quantity = 0.0;
}
In the Product microservice, I am doing an API call to the Ingredient microservice:在产品微服务中,我正在对成分微服务进行 API 调用:
// Making a call to the Ingredients microservice from the product microservice
WebClient myWebClient = WebClient.create("http://localhost:8090/api");
@PostMapping("/component/list/add/{id}")
public Mono<Ingredient> addProductComponent(@PathVariable Long id){
Product myProduct = new Product();
Mono<Ingredient> myProductComponentMono =
myWebClient
.get()
.uri("/components/component/get/{"+ id +'}')
.retrieve()
.bodyToMono(Ingredient.class);
return myProduct.addProductIngredient((Ingredient) myIngredientMono); //this is the line where I am getting the error.
}
Here is the line where I get the error in the above method:这是我在上述方法中得到错误的行:
return myProduct.addProductIngredient((Ingredient) myProductComponentMono);
I am getting the following error:我收到以下错误:
Inconvertible types;不可转换的类型; cannot cast 'reactor.core.publisher.Mono<com.product.product.Entity.Ingredient>' to 'com.product.product.Entity.Ingredient'无法将“reactor.core.publisher.Mono<com.product.product.Entity.Ingredient>”转换为“com.product.product.Entity.Ingredient”
What is a possible solution to fix the above problem?解决上述问题的可能解决方案是什么?
Just use myProductComponentMono.block()
instead of casting the retrieved mono to Ingredient
, since your code in method myProduct.addProductIngredient(...)
accept only an object of Ingredient
.只需使用myProductComponentMono.block()
而不是将检索到的 mono 转换为Ingredient
,因为您在方法myProduct.addProductIngredient(...)
中的代码只接受 object 的Ingredient
。
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