lettuce-infra. 【雪球-Infra】- 用lettuce的官方接口，目前对metric的采集组件化的形式都是采用的eventBus的形式，同时将视图刷新、连接数变化之类的记录下来，这些都是排查问题的利器

Problem

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Audience

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Market

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Pricing

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