用于服务启动之后，健康检查完成才会给服务流量

/*** http://localhost:8080/actuator/health* 服务启动后，服务健康状态为DOWN，等待执行完成warmup()之后变为UP** @author batman*/
@Component
public class MyHealthIndicator implements HealthIndicator {public static final AtomicBoolean preheat = new AtomicBoolean(false);public static final AtomicBoolean preheatEnd = new AtomicBoolean(false);public static final AtomicInteger count = new AtomicInteger(0);@Overridepublic Health health() {if (preheat.compareAndSet(false, true)) {warmup();preheatEnd.compareAndSet(false, true);}if (!preheatEnd.get()) {return Health.down().build();}return Health.up().build();}private void warmup() {try {Thread.sleep(5000L);} catch (InterruptedException e) {e.printStackTrace();}}}