摘要: Grafana能够提供自定义的图形界面来展示监控数据，但由于被监控的应用五花八门，标准不一，因此Prometheus开发了各种client，应用程序只需引入该SDK，即可与Prometheus沟通，提供Prometheus格式的数据，同时Grafana也开发了能识别Prometheus类型的数据源的插件，Grafana能够展示Prometheus上的数据。
非JAVA版本的应用：
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@Min and @Max are used for validating numeric fields which could be String(representing number), int, short, byte etc and their respective primitive wrappers.
@Size is used to check the length constraints on the fields.
As per documentation @Size supports String, Collection, Map and arrays while @Min and @Max supports primitives and their wrappers. See the documentation.