Spring Boot 2.1 Bean Override vs.Primary [英] Spring boot 2.1 bean override vs. Primary

问题描述

使用禁用Spring Boot 2.1 bean覆盖默认情况下，这是一件好事.

With Spring Boot 2.1 bean overriding is disabled by default, which is a good thing.

但是，我确实进行了一些测试，在这些测试中，我使用Mockito用模拟的实例替换了bean.使用默认设置时，具有此类配置的测试将因Bean覆盖而失败.

However I do have some tests where I replace beans with mocked instances using Mockito. With the default setting Tests with such a configuration will fail due to bean overriding.

我发现可行的唯一方法是通过应用程序属性启用bean覆盖:

The only way I found worked, was to enable bean overriding through application properties:

spring.main.allow-bean-definition-overriding=true

但是，我真的很想确保为我的测试配置设置最少的bean定义，这将在禁用覆盖的Spring指出.

However I would really like to ensure minimal bean definition setup for my test configuration, which would be pointed out by spring with the overriding disabled.

我要覆盖的bean要么是

The beans that I am overriding are either

• 在导入我的测试配置的另一个配置中定义
• 通过注释扫描自动发现的豆子

我认为应该在覆盖Bean的测试配置中起作用，并在其上拍上 @Primary ，因为我们习惯于数据源配置.但是，这没有效果，让我感到奇怪: @Primary 和禁用的Bean覆盖是否矛盾?

What I was thinking should work in the test configuration overriding the bean and slap a @Primary on it, as we are used to for data source configurations. This however has no effect and got me wondering: Is the @Primary and the disabled bean overriding contradictory?

一些例子:

package com.stackoverflow.foo;
@Service
public class AService {
}

package com.stackoverflow.foo;
public class BService {
}

package com.stackoverflow.foo;
@Configuration
public BaseConfiguration {
    @Bean
    @Lazy
    public BService bService() {
        return new BService();
    }
}

package com.stackoverflow.bar;
@Configuration
@Import({BaseConfiguration.class})
public class TestConfiguration {
    @Bean
    public BService bService() {
        return Mockito.mock(BService.class);
    }
}

推荐答案

覆盖Bean意味着在上下文中可能只有一个具有唯一名称或ID的Bean.因此，您可以通过以下方式提供两个bean:

Overriding beans means that there may be only one bean with a unique name or id in the context. So you can provide two beans in the following way:

package com.stackoverflow.foo;
@Configuration
public class BaseConfiguration {
   @Bean
   @Lazy
   public BService bService1() {
       return new BService();
   }
}

package com.stackoverflow.bar;
@Configuration
@Import({BaseConfiguration.class})
public class TestConfiguration {
    @Bean
    public BService bService2() {
        return Mockito.mock(BService.class);
    }
}

如果添加 @Primary ，则默认情况下将在以下位置注入主bean:

If you add @Primary then primary bean will be injected by default in:

@Autowired
BService bService;

这篇关于Spring Boot 2.1 Bean Override vs.Primary的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！