pool

type Closer interface {
	Close() error
}

type Conn struct {
	C Closer

	Inited bool
	// contains filtered or unexported fields
}

type ConnPool struct {
	// contains filtered or unexported fields
}

type Options struct {
	Dialer  func(context.Context) (Closer, error)
	OnClose func(*Conn) error

	PoolSize           int
	MinIdleConns       int
	MaxConnAge         time.Duration
	PoolTimeout        time.Duration
	IdleTimeout        time.Duration
	IdleCheckFrequency time.Duration
}

type Pooler interface {
	NewConn(context.Context) (*Conn, error)
	CloseConn(*Conn) error

	Get(context.Context) (*Conn, error)
	Put(*Conn)
	Remove(*Conn)

	Len() int
	IdleLen() int
	Stats() *Stats

	Close() error
}

type Stats struct {
	Hits     uint32 // number of times free connection was found in the pool
	Misses   uint32 // number of times free connection was NOT found in the pool
	Timeouts uint32 // number of times a wait timeout occurred

	TotalConns uint32 // number of total connections in the pool
	IdleConns  uint32 // number of idle connections in the pool
	StaleConns uint32 // number of stale connections removed from the pool
}