spring cloud 健康监测配置

server:
  port: 8761
eureka:
  client: 
    register-with-eureka: false
    fetch-registry: false
  server:
    enable-self-preservation: false
    #每指定时间 刷新服务列表
    eviction-interval-timer-in-ms: 5000

server:
  port: 8080
spring:
  application:
    name: my-health-provider
endpoints:
  sensitive: false
eureka:
  instance:
    #每指定时间向发送 eureka服务器发送续约信息
    leaseRenewalIntervalInSeconds: 5
    #每指定时间没有向服务器发送续约信息,即向eureka服务器发送down机信息
    leaseExpirationDurationInSeconds: 10
    metadata-map:
      company-name: crazyit     
  client:
    #指示将实例信息复制到eureka服务器的开始时间（以秒为单位）
    #配合健康检测器,健康指示器 将实例健康状态通知eureka服务器
    instanceInfoReplicationIntervalSeconds: 10
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

@Component
public class MyHealthIndicator implements HealthIndicator {

    public Health health() {
        if(PoliceController.canVisitDb) {
            return new Health.Builder(Status.UP).build();
        } else {
            return new Health.Builder(Status.DOWN).build();
        }
    }

}

@Component
public class MyHealthCheckHandler implements HealthCheckHandler {

    @Autowired
    private MyHealthIndicator halthIndicator;
    
    public InstanceStatus getStatus(InstanceStatus currentStatus) {
        Status status = halthIndicator.health().getStatus();
        if(status.equals(Status.UP)) {
            return InstanceStatus.UP;
        } else {
            return InstanceStatus.DOWN;
        }
    }

}