[英]How to find unused properties in a spring boot 1 application
Is there a way in a spring boot 1 application to know the effective properties used by a Spring Boot application versus all properties setted up with YAML, system properties... Spring Boot 1应用程序中是否有办法了解Spring Boot应用程序使用的有效属性与使用YAML设置的所有属性,系统属性...
Ideally I would like to detect that in an ApplicationListener class and prevent the application to start if there are any obsolete properties that we maintain in our framework. 理想情况下,如果我们在框架中维护任何过时的属性,我想在ApplicationListener类中进行检测,并阻止应用程序启动。
Thx by advance for your help, 提前感谢您的帮助,
Eric 埃里克
What I did when I had the same requirement was creating my own PropertyPlaceholderConfigurer: 当我有相同的要求时,我所做的就是创建自己的PropertyPlaceholderConfigurer:
public class DisplayablePropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
private static final Logger log = LoggerFactory.getLogger(DisplayablePropertyPlaceholderConfigurer.class);
private int processedNum;
private HashSet<String> propertyNames = new HashSet<>();
@Override
protected void doProcessProperties(ConfigurableListableBeanFactory beanFactoryToProcess, StringValueResolver valueResolver) {
super.doProcessProperties(beanFactoryToProcess, valueResolver);
}
@Override
protected String resolvePlaceholder(String placeholder, Properties props, int systemPropertiesMode) {
return super.resolvePlaceholder(placeholder, props, systemPropertiesMode);
}
@Override
protected String resolvePlaceholder(String placeholder, Properties props) {
propertyNames.add(placeholder);
return super.resolvePlaceholder(placeholder, props);
}
@Override
protected String resolveSystemProperty(String key) {
return super.resolveSystemProperty(key);
}
public HashSet<String> getPropertyNames() {
return propertyNames;
}
}
You could then register some CommandLineListener or ApplicationEvent listener to call getPropertyNames() on application startup. 然后,您可以注册一些CommandLineListener或ApplicationEvent侦听器,以在应用程序启动时调用getPropertyNames()。
After that you will get a list of used properties. 之后,您将获得已使用属性的列表。 It's a good point to start, isn't it? 这是一个很好的起点,不是吗? You can sort both lists and compare to filter out properties that are not used. 您可以对两个列表进行排序并进行比较以过滤掉未使用的属性。
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