pool

type OpenFunc func() Resource

type Pool struct {
	Min         int           // minimum resources to keep
	Max         int           // maximum resources to open
	Concurrency int           // number of types a resource can be acquired (concurrently)
	MaxIdle     time.Duration // Time in idle state (no acquire resources) before closing excess resources (keeps at most Min resources)
	Open        OpenFunc      // Function for openeing a resource
	// contains filtered or unexported fields
}

type Resource interface {
	// Close doesn't return an error as the resources is expected to handle (and log) all errors
	Close()
	IsClosed() bool
}