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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,102 +1,113 @@ | ||
| package redis | ||
|
|
||
| // Not thread-safe. | ||
| // Pipeline implements pipelining as described in | ||
| // http://redis.io/topics/pipelining. | ||
| // | ||
| // Pipeline is not thread-safe. | ||
| type Pipeline struct { | ||
| commandable | ||
|
|
||
| cmds []Cmder | ||
| client *baseClient | ||
|
|
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| cmds []Cmder | ||
| closed bool | ||
| } | ||
|
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| func (c *Client) Pipeline() *Pipeline { | ||
| pipe := &Pipeline{ | ||
| client: &baseClient{ | ||
| opt: c.opt, | ||
| connPool: c.connPool, | ||
| }, | ||
| cmds: make([]Cmder, 0, 10), | ||
| client: c.baseClient, | ||
| cmds: make([]Cmder, 0, 10), | ||
| } | ||
| pipe.commandable.process = pipe.process | ||
| return pipe | ||
| } | ||
|
|
||
| func (c *Client) Pipelined(f func(*Pipeline) error) ([]Cmder, error) { | ||
| pc := c.Pipeline() | ||
| if err := f(pc); err != nil { | ||
| func (c *Client) Pipelined(fn func(*Pipeline) error) ([]Cmder, error) { | ||
| pipe := c.Pipeline() | ||
| if err := fn(pipe); err != nil { | ||
| return nil, err | ||
| } | ||
| cmds, err := pc.Exec() | ||
| pc.Close() | ||
| cmds, err := pipe.Exec() | ||
| pipe.Close() | ||
| return cmds, err | ||
| } | ||
|
|
||
| func (c *Pipeline) process(cmd Cmder) { | ||
| c.cmds = append(c.cmds, cmd) | ||
| func (pipe *Pipeline) process(cmd Cmder) { | ||
| pipe.cmds = append(pipe.cmds, cmd) | ||
| } | ||
|
|
||
| func (c *Pipeline) Close() error { | ||
| c.closed = true | ||
| func (pipe *Pipeline) Close() error { | ||
| pipe.Discard() | ||
| pipe.closed = true | ||
| return nil | ||
| } | ||
|
|
||
| func (c *Pipeline) Discard() error { | ||
| if c.closed { | ||
| // Discard resets the pipeline and discards queued commands. | ||
| func (pipe *Pipeline) Discard() error { | ||
| if pipe.closed { | ||
| return errClosed | ||
| } | ||
| c.cmds = c.cmds[:0] | ||
| pipe.cmds = pipe.cmds[:0] | ||
| return nil | ||
| } | ||
|
|
||
| // Exec always returns list of commands and error of the first failed | ||
| // command if any. | ||
| func (c *Pipeline) Exec() (cmds []Cmder, retErr error) { | ||
| if c.closed { | ||
| func (pipe *Pipeline) Exec() (cmds []Cmder, retErr error) { | ||
| if pipe.closed { | ||
| return nil, errClosed | ||
| } | ||
| if len(c.cmds) == 0 { | ||
| return c.cmds, nil | ||
| if len(pipe.cmds) == 0 { | ||
| return pipe.cmds, nil | ||
| } | ||
|
|
||
| cmds = c.cmds | ||
| c.cmds = make([]Cmder, 0, 0) | ||
|
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||
| for i := 0; i <= c.client.opt.MaxRetries; i++ { | ||
| if i > 0 { | ||
| resetCmds(cmds) | ||
| } | ||
| cmds = pipe.cmds | ||
| pipe.cmds = make([]Cmder, 0, 10) | ||
|
|
||
| cn, err := c.client.conn() | ||
| failedCmds := cmds | ||
| for i := 0; i <= pipe.client.opt.MaxRetries; i++ { | ||
| cn, err := pipe.client.conn() | ||
| if err != nil { | ||
| setCmdsErr(cmds, err) | ||
| setCmdsErr(failedCmds, err) | ||
| return cmds, err | ||
| } | ||
|
|
||
| retErr = c.execCmds(cn, cmds) | ||
| c.client.putConn(cn, err) | ||
| if shouldRetry(err) { | ||
| continue | ||
| if i > 0 { | ||
| resetCmds(failedCmds) | ||
| } | ||
| failedCmds, err = execCmds(cn, failedCmds) | ||
| pipe.client.putConn(cn, err) | ||
| if err != nil && retErr == nil { | ||
| retErr = err | ||
| } | ||
| if len(failedCmds) == 0 { | ||
| break | ||
| } | ||
|
|
||
| break | ||
| } | ||
|
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| return cmds, retErr | ||
| } | ||
|
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| func (c *Pipeline) execCmds(cn *conn, cmds []Cmder) error { | ||
| func execCmds(cn *conn, cmds []Cmder) ([]Cmder, error) { | ||
| if err := cn.writeCmds(cmds...); err != nil { | ||
| setCmdsErr(cmds, err) | ||
| return err | ||
| return cmds, err | ||
| } | ||
|
|
||
| var firstCmdErr error | ||
| var failedCmds []Cmder | ||
| for _, cmd := range cmds { | ||
| err := cmd.parseReply(cn.rd) | ||
| if err != nil && firstCmdErr == nil { | ||
| if err == nil { | ||
| continue | ||
| } | ||
| if firstCmdErr == nil { | ||
| firstCmdErr = err | ||
| } | ||
| if shouldRetry(err) { | ||
| failedCmds = append(failedCmds, cmd) | ||
| } | ||
| } | ||
|
|
||
| return firstCmdErr | ||
| return failedCmds, firstCmdErr | ||
| } |
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