继承方法重新实现dohealthCheck方法
HealthIndicator<-AbstractHealthIndicator<-RedisHealthIndicator->doHealthCheck
abstract class AbstractHealthIndicator implements HealthIndicator
Health<-Build
RedisHealthIndicator
RabbitMq在springboot中的健康检查
RabbitHealthIndicator
dohealthCheck 获取连接的版本号，来确定是否成功
org.springframework.retry.RetryCallback->RetryTemplate->doExecute
retryTemplate doWithRetry
retryListener
retryManager
ApplicationHealthIndicator
RedisHealthIndicator
DataSourceHealthIndicator