simple pool of golang

gistfile1.txt

var (
	MAX_POOL_SIZE  =  20
	ch               chan *Client
)

func getPool() *Client {

	if ch == nil {
		ch = make(chan *Client, MAX_POOL_SIZE)
	}
	if len(ch) == 0 {
		go func() {
			for i := 0; i < MAX_POOL_SIZE/2; i++ {
				conn, err := NewClient()
				if err != nil {
					println(err)
				} else {
					setPool(conn)
				}
			}
		}()
	}
	return <-ch

}

func setPool(conn *Client) {
	if ch == nil {
		ch = make(chan *Client, MAX_POOL_SIZE)
	}
	if len(ch) == MAX_POOL_SIZE {
		conn.Close()
		return
	}
	ch <- conn
}