/usr/share/gocode/src/gopkg.in/redis.v2/multi.go is in golang-gopkg-redis.v2-dev 2.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | package redis
import (
"errors"
"fmt"
)
var errDiscard = errors.New("redis: Discard can be used only inside Exec")
// Not thread-safe.
type Multi struct {
*Client
}
func (c *Client) Multi() *Multi {
return &Multi{
Client: &Client{
baseClient: &baseClient{
opt: c.opt,
connPool: newSingleConnPool(c.connPool, true),
},
},
}
}
func (c *Multi) Close() error {
if err := c.Unwatch().Err(); err != nil {
return err
}
return c.Client.Close()
}
func (c *Multi) Watch(keys ...string) *StatusCmd {
args := append([]string{"WATCH"}, keys...)
cmd := NewStatusCmd(args...)
c.Process(cmd)
return cmd
}
func (c *Multi) Unwatch(keys ...string) *StatusCmd {
args := append([]string{"UNWATCH"}, keys...)
cmd := NewStatusCmd(args...)
c.Process(cmd)
return cmd
}
func (c *Multi) Discard() error {
if c.cmds == nil {
return errDiscard
}
c.cmds = c.cmds[:1]
return nil
}
// Exec always returns list of commands. If transaction fails
// TxFailedErr is returned. Otherwise Exec returns error of the first
// failed command or nil.
func (c *Multi) Exec(f func() error) ([]Cmder, error) {
c.cmds = []Cmder{NewStatusCmd("MULTI")}
if err := f(); err != nil {
return nil, err
}
c.cmds = append(c.cmds, NewSliceCmd("EXEC"))
cmds := c.cmds
c.cmds = nil
if len(cmds) == 2 {
return []Cmder{}, nil
}
cn, err := c.conn()
if err != nil {
setCmdsErr(cmds[1:len(cmds)-1], err)
return cmds[1 : len(cmds)-1], err
}
err = c.execCmds(cn, cmds)
if err != nil {
c.freeConn(cn, err)
return cmds[1 : len(cmds)-1], err
}
c.putConn(cn)
return cmds[1 : len(cmds)-1], nil
}
func (c *Multi) execCmds(cn *conn, cmds []Cmder) error {
err := c.writeCmd(cn, cmds...)
if err != nil {
setCmdsErr(cmds[1:len(cmds)-1], err)
return err
}
statusCmd := NewStatusCmd()
// Omit last command (EXEC).
cmdsLen := len(cmds) - 1
// Parse queued replies.
for i := 0; i < cmdsLen; i++ {
if err := statusCmd.parseReply(cn.rd); err != nil {
setCmdsErr(cmds[1:len(cmds)-1], err)
return err
}
}
// Parse number of replies.
line, err := readLine(cn.rd)
if err != nil {
setCmdsErr(cmds[1:len(cmds)-1], err)
return err
}
if line[0] != '*' {
err := fmt.Errorf("redis: expected '*', but got line %q", line)
setCmdsErr(cmds[1:len(cmds)-1], err)
return err
}
if len(line) == 3 && line[1] == '-' && line[2] == '1' {
setCmdsErr(cmds[1:len(cmds)-1], TxFailedErr)
return TxFailedErr
}
var firstCmdErr error
// Parse replies.
// Loop starts from 1 to omit MULTI cmd.
for i := 1; i < cmdsLen; i++ {
cmd := cmds[i]
if err := cmd.parseReply(cn.rd); err != nil {
if firstCmdErr == nil {
firstCmdErr = err
}
}
}
return firstCmdErr
}
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