atomic.Value can work pretty well as well, their example docs show how to do it as well: https://golang.org/pkg/sync/atomic/#example_Value_config https://golang

atomic.Value can work pretty well as well, their example docs show how to do it as well: https://golang.org/pkg/sync/atomic/#example_Value_config https://golang.org/pkg/sync/atomic/#example_Value_config DBPool gets a bit more interesting. In Java world you can you providers that give you access to something, which is what middleware tends to do for Go. If you can have your middleware be able to swap the pool config its loading from, that should work just fine. atomic.Value make work here as well.