Spring @Conditional 基于数据库表中的值 [英] Spring @Conditional based on a value in database table

问题描述

条件评估取决于数据库表中提供的值

Condition evaluation depends on a value provided in data base table

@Component
public class XYZCondition implements Condition{

    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
              //based on value defined in DB should return true/false
    }

}

由于条件很早执行，无法获取数据库值有没有其他方法可以实现这一目标?

As Condition is executing very early, unable to fetch db value is there any alternate way to achieve this ?

推荐答案

可以在应用程序工作期间更改数据库值，而重新加载应用程序上下文似乎不是一个好主意.所以我建议使用配置属性来选择哪些 bean 应该在上下文中可用.

Database values can be changed during application work, while it doesn't seem a good idea to reload application context. So I would recommended using configuration properties to choose which beans should be available in context.

此外，还有一个 Spring Cloud Config，允许您将配置存储在 git 或其他一些存储中.一旦配置更改，其使用者可能会重新启动上下文.似乎也值得一看.

Moreover, there's a Spring Cloud Config that allows you to store configuration in git or some other storages. Its consumers may restart context once configuration changes. It seems worth talking a look at it as well.

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