HEL-543 返工: 补充 observability 运行时可关闭开关 (DATAHUB_OBSERVABILITY)
总工复核 🔴:安全边界要求新增观测功能必须可关闭、关闭后现有功能完全照旧, 但此前实现没有任何运行时开关。修复: - settings.py: 新增 Settings.observability_enabled 字段,沿用既有 DATAHUB_SCHEDULER 的环境变量模式,读取 DATAHUB_OBSERVABILITY (0/false/off 关闭,默认开启)。 - hub.py: Hub.__init__ 把 settings.observability_enabled 挂到 self.db 上,让 pipeline/realtime_serve/steward/admin_api 已经 在传的 db 参数直接带上开关,零额外改造。 - observability.py: 新增 is_enabled(db),缺失该属性时默认按启用处理 (向后兼容裸 HubDB 用例/测试)。关闭时 observe() 变成纯 透传(不计时、不分类、不碰数据库),record_call() 直接 no-op。 - admin_api.py: 4 个新只读端点关闭时返回明确的 {"enabled": false, ...空结构} 而不是静默返回旧数据。 - 新增 10 个测试:开关默认值/环境变量解析、关闭后 observe() 的透传语义 (含异常原样重新抛出)、关闭后 record_call() 零写入、关闭后重新开启恢复 记录、4 个 admin 端点在关闭态的响应结构。 全量测试 183/183 通过(新增 10 个,含此前 173 个零回归)。 Co-authored-by: Cursor <cursoragent@cursor.com> Co-authored-by: multica-agent <github@multica.ai>
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@@ -24,6 +24,12 @@ class Hub:
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raise SystemExit("DATAHUB_ENCRYPTION_KEY 未配置")
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self.settings = settings
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self.db = HubDB(settings.db_path)
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# HEL-543: carry the observability kill switch on the db handle so
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# every call site that already threads `db` through (pipeline,
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# realtime_serve, steward, admin_api) picks it up for free with no
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# extra plumbing. Missing this attribute (e.g. a bare HubDB built
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# directly in tests) defaults to enabled — see observability.is_enabled.
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self.db.observability_enabled = settings.observability_enabled
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self.vault = SecretVault(settings.encryption_key)
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self.auth = AuthService(self.db, self.vault, settings.api_token, settings.admin_password)
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token = settings.tushare_token or self.auth.load_credential("tushare_token")
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