springcloud consul 配置监听

於德馨
2023-12-01

consul 默认配置修改后会自动刷新配置,但在某些时候我们需要获取修改我们修改之后的配置, 做自定义处理.
consul 在刷新配置之后 执行了EnvironmentChangeEvent事件, 我们只需要监听此事件即可.

	// springcloud consul  源码
   public synchronized Set<String> refreshEnvironment() {
        // 获取刷新前所有配置
		Map<String, Object> before = extract(
				this.context.getEnvironment().getPropertySources());
		// 实际执行刷新配置
		addConfigFilesToEnvironment();
		// 将新配置和老配置进行合并(若有更新则覆盖老配置,若无则保留老配置)
		Set<String> keys = changes(before,
				extract(this.context.getEnvironment().getPropertySources())).keySet();
		this.context.publishEvent(new EnvironmentChangeEvent(this.context, keys));
		return keys;
	}

事件监听代码

 	@EventListener(EnvironmentChangeEvent.class)
    public void refreshed(EnvironmentChangeEvent event) {
        Object source = event.getSource();
        MutablePropertySources propertySources = ((AnnotationConfigServletWebServerApplicationContext) source)
                .getEnvironment().getPropertySources();
        // System.out.println(event.getKeys());
        // Set<String> keys = event.getKeys();
        propertySources.forEach(str -> {
           // todo do something 此处即为项目所有配置信息
        });
        System.out.println("事件执行-- EnvironmentChangeEvent");
    }

参考链接: https://blog.csdn.net/dbqb007/article/details/105407639

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