92 lines
1.4 KiB
Go
92 lines
1.4 KiB
Go
package redis
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// Not thread-safe.
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type Pipeline struct {
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*Client
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closed bool
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}
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func (c *Client) Pipeline() *Pipeline {
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return &Pipeline{
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Client: &Client{
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baseClient: &baseClient{
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opt: c.opt,
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connPool: c.connPool,
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cmds: make([]Cmder, 0),
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},
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},
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}
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}
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func (c *Client) Pipelined(f func(*Pipeline) error) ([]Cmder, error) {
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pc := c.Pipeline()
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if err := f(pc); err != nil {
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return nil, err
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}
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cmds, err := pc.Exec()
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pc.Close()
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return cmds, err
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}
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func (c *Pipeline) Close() error {
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c.closed = true
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return nil
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}
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func (c *Pipeline) Discard() error {
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if c.closed {
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return errClosed
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}
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c.cmds = c.cmds[:0]
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return nil
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}
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// Exec always returns list of commands and error of the first failed
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// command if any.
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func (c *Pipeline) Exec() ([]Cmder, error) {
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if c.closed {
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return nil, errClosed
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}
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cmds := c.cmds
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c.cmds = make([]Cmder, 0)
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if len(cmds) == 0 {
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return []Cmder{}, nil
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}
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cn, err := c.conn()
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if err != nil {
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setCmdsErr(cmds, err)
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return cmds, err
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}
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if err := c.execCmds(cn, cmds); err != nil {
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c.freeConn(cn, err)
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return cmds, err
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}
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c.putConn(cn)
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return cmds, nil
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}
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func (c *Pipeline) execCmds(cn *conn, cmds []Cmder) error {
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if err := c.writeCmd(cn, cmds...); err != nil {
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setCmdsErr(cmds, err)
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return err
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}
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var firstCmdErr error
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for _, cmd := range cmds {
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if err := cmd.parseReply(cn.rd); err != nil {
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if firstCmdErr == nil {
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firstCmdErr = err
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}
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}
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}
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return firstCmdErr
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}
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