本地环境时覆盖Apollo配置

如果在本地环境，需要进行某些配置的更改，但是只是为了本地开发方便，例如服务端口的更改，Eureka注册地址的更改，那么可以使用该组件进行配置覆盖。

分步指南

1. 实现原理
2. 代码实现
3. 适用场景

 

一、实现原理

 

 

二、代码实现

LocalApplicationRecoverConfiguration：

 

@Configuration

@Slf4j

@ConditionalOnProperty(value = "spring.profiles.active",havingValue = "local")

public class LocalApplicationRecoverConfiguration{

 

@Bean

public PropertySourcesProcessor configPropertySourcesProcessor() {

log.info("use local configPropertySourcesProcessor");

return new LocalConfigPropertySourcesProcessor();

}

 

}

 

LocalConfigPropertySourcesProcessor：

 

@Slf4j
public class LocalConfigPropertySourcesProcessor extends PropertySourcesProcessor implements  BeanDefinitionRegistryPostProcessor {

  private static final String LOCAL_ACTIVE = "local";

  private static final String[] LOCAL_APPLICATIONS = new String[]{"applicationConfig: [classpath:/application.yml]","applicationConfig: [classpath:/application-local.yml]","applicationConfig: [classpath:/application-local.yaml]","applicationConfig: [classpath:/application-local.properties]"};

  private int order = Integer.MAX_VALUE;

  private ConfigurableEnvironment environment;

  @Override
  public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {

  }

  @Override
  public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
    String[] activeProfiles = environment.getActiveProfiles();
    if(activeProfiles != null){
      for (String activeProfile : activeProfiles) {
        if(LOCAL_ACTIVE.equals(activeProfile)){
          MutablePropertySources propertySources = environment.getPropertySources();
          for (String localApplication : LOCAL_APPLICATIONS) {
            PropertySource<?> propertySource = propertySources.get(localApplication);
            if(propertySource != null){
              propertySources.remove(localApplication);
              propertySources.addFirst(propertySource);
            }
          }
        }
      }
    }
  }

  @Override
  public void setEnvironment(Environment environment) {
      this.environment = (ConfigurableEnvironment)environment;
  }

  @Override
  public int getOrder() {
    return order;
  }
}

 

 

三、适用场景

本地需要更改某些配置，但是不能直接更改Apollo，例如端口号的更改，注册中心地址的更改，数据库配置信息的更改等。简而言之就是，配置更改只对自己可见，不能影响其它开发人员。