Modify metrics lib to allow for direct external adapters

描述

贡献者指南

技术栈

go

领域

backendobservability

议题类型

feature

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

1-3 hours

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

stale

清晰度议题是否清楚说明期望改动、验收标准和下一步。

needs investigation

前置要求

Go programmingfamiliarity with expvars

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

30

研究方向

The issue requests adding a direct external adapter to the metrics library, which currently only supports expvars export. Look at the metrics library code in the repository (likely in a metrics package). Investigate the current export interface and consider adding a method or adapter that allows any external consumer to access metrics data directly, possibly via a callback or a reader interface. Review any linked pull requests or comments for additional context. The solution should maintain backward compatibility with existing expvars functionality.