[add] Add stale connection checker to replace broken connections#12
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zark12138 wants to merge 1 commit intoshimingyah:masterfrom
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[add] Add stale connection checker to replace broken connections#12zark12138 wants to merge 1 commit intoshimingyah:masterfrom
zark12138 wants to merge 1 commit intoshimingyah:masterfrom
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[add] Add stale connection checker to replace broken connections [add] Add stale connection checker to replace broken connections
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[add] Add stale connection checker to replace broken connections
针对 https://github.com/shimingyah/pool/issues/11的 修复
增加了一个异步扫描连接池的协程，用于维护连接池的健康
检测到类似的“僵尸连接”（不可用连接）会清理并重新插入
如下图的test所示，创建了一个只有一个连接的连接池，直接调用grpc的close()关闭连接之后，再次获取连接池中的连接将不再可用
这是引入此次pr的结果，异步协程会清理掉“僵尸连接”并重新插入一个正常的连接