Spring Produce multiple beans from as single @Bean method

Paleozoic opened SPR-17441 and commented

When inject two beans,such as the following code:

@Bean("bean1")
public Bean buildBean1(){
    Bean bean = new Bean();
    return bean ;
}
@Bean("bean2")
public Bean buildBean2(){
    Bean bean = new Bean();
    return bean ;
}

can I just write the code? such as:

@Beans
public Map<String,Bean> buildBeans(){
    Map<String,Bean> beans = new HashMap<>();
    beans.put("bean1",new Bean());
    beans.put("bean2",new Bean());
   return beans ;
}

sometimes we can not confirm how many beans to inject,we have to write complex BeanDefinition and then registerBeanDefinition. if we have @Beans,everything is easy~

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Affects: 5.1.1

Comment From: spring-projects-issues

Zhang Jie commented

If you don't confirm how many beans to inject, using @Component and @ComponentScan will help, it's not necessary to define every bean using @Bean.

Comment From: spring-projects-issues

Paleozoic commented

can @Component  and @ComponentScan  inject beans dynamically?

we also need to write java code to define beans and then scan components.

I mean that we can only use the yml configuration to inject beans dynamically.

for example,the above code shows that @Beans can inject beans dynamically ,we just need to handle the yml configuration in the buildBeans method.

such as we inject the datasources dynamically…

Comment From: snicoll

There isn't such way to declare beans in a generic fashion but the framework offers several hooks points. You could import an ImportBeanDefinitionRegistrar on a configuration class and you'll get a callback to register any bean you want. If those beans are singleton, you can also register them programmatically.