@RefreshScope使用

需要刷新的对象单独写在一个类中

@Component
public class NacosTestRunner implements ApplicationRunner {

    @Resource
    private TestProp testProp;

    // @Value("${test.a:2}")
    // int a;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        CompletableFuture.runAsync(() -> {
            while (true) {
                try {
                    System.out.println("a = " + testProp.getA());
                    if (testProp.getA() == -1) {
                        break;
                    }
                    TimeUnit.SECONDS.sleep(2);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        });
    }
}

@Component
@RefreshScope
public class TestProp {

    @Value("${test.a:2}")
    private int a;

    public void setA(int a) {
        this.a = a;
    }

    public int getA() {
        return a;
    }
}