Function NewPool

setu/pool.go:42–61

NewPool 新的缓存池

(folder string, rolimg func(string) (string, error), getdat func(string) ([]byte, error), timeout time.Duration)

// NewPool 新的缓存池
func NewPool(folder string, rolimg func(string) (string, error), getdat func(string) ([]byte, error), timeout time.Duration) (*Pool, error) {
	if folder == "" {
		return nil, ErrNilFolder
	}
	if file.IsNotExist(folder) {
		err := os.MkdirAll(folder, 0755)
		if err != nil {
			return nil, err
		}
	}
	if folder[len(folder)-1] != '/' {
		folder += "/"
	}
	return &Pool{
		folder:  folder,
		rolimg:  rolimg,
		getdat:  getdat,
		timeout: timeout,
	}, nil
}

// Roll 从缓存池随机挑一张
func (p *Pool) Roll(typ string) (string, error) {