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 中实现这一点？我不想频繁访问数据库。我正在考虑在请求开始时进行一次调用。有这方面的例子吗？如果是这样，请告诉我。谢谢
最佳答案
创建要素类实现:
public enum CustomFeatures implements Feature {
@Label("Activates customFeature")
MY_CUSTOM_FEATURE;
public boolean isActive() {
return FeatureContext.getFeatureManager().isActive(this);
}
}
创建功能提供者:
@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状态
@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功能是否已启用，如下所示:
if(CustomFeatures.MY_CUSTOM_FEATURE.isActive()) {
}
或者使用Spring方面..
关于java - 数据库驱动功能切换，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54890534/