数据库驱动的功能切换

Question

我想根据数据库值启用我的新功能。如果为该功能设置了数据库值，则应启用新代码。否则，它应该切换并流向旧代码。有没有办法在Java/Spring中实现这一目标？我不想经常打到数据库。我正在考虑在请求开始时一个呼叫。有什么例子吗？如果是这样，请告诉我。谢谢

Answer 1

创建功能类实现：

public enum CustomFeatures implements Feature {
    @Label("Activates customFeature")
    MY_CUSTOM_FEATURE;
    public boolean isActive() {
        return FeatureContext.getFeatureManager().isActive(this);
    }
}

创建功能提供商：

@Bean
public FeatureProvider featureProvider() {
    return new EnumBasedFeatureProvider(CustomFeatures.class);
}

创建实体和存储库：

@Entity
public class Feature {
    private String name;
    private Boolean active;
    // getters-setters
}

创建@component，它将查询数据库并设置新功能SATE

@Component
public class FeatureToggler {
   private final FeatureRepository featureRepository;
   private final FeatureManager featureManager;
   private FeatureToggler(FeatureRepository featureRepository, FeatureManager featureManager) {
      this.featureRepository = featureRepository;
      this.featureManager = featureManager;
   }
   @Schedule(fixedRate=60000)
   public void refreshFeatureToggles() {
        featureManager.setFeatureState(new FeatureState(CustomFeatures.MY_CUSTOM_FEATURE, featureRepository.findByName().isActive);
   }

}

现在您可以使用检查是否启用了这样的功能：

if(CustomFeatures.MY_CUSTOM_FEATURE.isActive()) {
}

或使用春季。