spring 热更新配置

我们经常会遇到不重启服务，自动刷新配置的需求。该如何实现呢？

@Scope(“prototype”) - 热更新

spring prototype

如上文中的BarService,每次变更配置文件中的x.bar配置信息,都能及时应用到service中。

@Slf4j
@Component
@Scope("prototype") // prototype原型模式
public class BarService {
   

    @Value("${x.bar}")
    private String bar;

    public void bar() {
   
        log.info("---bar:{} ,{}", bar, this);
    }
}

code

ConfigRefreshEvent

public class ConfigRefreshEvent extends ApplicationEvent {
   
    @Getter
    @Setter
    private String path;

    public ConfigRefreshEvent(Object source) {
   
        super(source);
    }

    public ConfigRefreshEvent(Object source, String path) {
   
        super(source);
        this.path = path;
    }
}

ConfigRefreshEventListener

@Component
public class ConfigRefreshEventListener implements ApplicationListener<ConfigRefreshEvent> {
   
    @Autowired
    ConfigurableEnvironment configurableEnvironment;

    @Autowired
    private GenericApplicationContext applicationContext;

    @Override
    public void onApplicationEvent(ConfigRefreshEvent event) {
   <