增加plc连接状态

zhangqian

2023-09-14 3f1ef5cdf9212f912e9cad544387947d158f5d08

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package constvar
 
import (
    "github.com/songzhibin97/gkit/cache/local_cache"
    "golang.org/x/sync/singleflight"
)
 
var (
    BlackCache  local_cache.Cache
    SingleGroup = &singleflight.Group{}
)