mirror of https://github.com/go-redis/redis.git
935 lines
17 KiB
Go
935 lines
17 KiB
Go
package redis
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import (
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"bytes"
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"fmt"
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"strconv"
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"strings"
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"time"
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"gopkg.in/redis.v4/internal/pool"
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)
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var (
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_ Cmder = (*Cmd)(nil)
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_ Cmder = (*SliceCmd)(nil)
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_ Cmder = (*StatusCmd)(nil)
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_ Cmder = (*IntCmd)(nil)
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_ Cmder = (*DurationCmd)(nil)
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_ Cmder = (*BoolCmd)(nil)
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_ Cmder = (*StringCmd)(nil)
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_ Cmder = (*FloatCmd)(nil)
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_ Cmder = (*StringSliceCmd)(nil)
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_ Cmder = (*BoolSliceCmd)(nil)
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_ Cmder = (*StringStringMapCmd)(nil)
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_ Cmder = (*StringIntMapCmd)(nil)
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_ Cmder = (*ZSliceCmd)(nil)
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_ Cmder = (*ScanCmd)(nil)
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_ Cmder = (*ClusterSlotsCmd)(nil)
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)
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type Cmder interface {
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args() []interface{}
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arg(int) string
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readReply(*pool.Conn) error
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setErr(error)
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reset()
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readTimeout() *time.Duration
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Err() error
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fmt.Stringer
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}
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func setCmdsErr(cmds []Cmder, e error) {
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for _, cmd := range cmds {
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cmd.setErr(e)
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}
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}
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func resetCmds(cmds []Cmder) {
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for _, cmd := range cmds {
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cmd.reset()
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}
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}
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func writeCmd(cn *pool.Conn, cmds ...Cmder) error {
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cn.Buf = cn.Buf[:0]
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for _, cmd := range cmds {
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var err error
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cn.Buf, err = appendArgs(cn.Buf, cmd.args())
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if err != nil {
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return err
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}
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}
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_, err := cn.Write(cn.Buf)
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return err
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}
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func cmdString(cmd Cmder, val interface{}) string {
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var ss []string
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for _, arg := range cmd.args() {
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ss = append(ss, fmt.Sprint(arg))
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}
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s := strings.Join(ss, " ")
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if err := cmd.Err(); err != nil {
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return s + ": " + err.Error()
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}
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if val != nil {
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switch vv := val.(type) {
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case []byte:
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return s + ": " + string(vv)
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default:
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return s + ": " + fmt.Sprint(val)
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}
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}
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return s
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}
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//------------------------------------------------------------------------------
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type baseCmd struct {
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_args []interface{}
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err error
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_readTimeout *time.Duration
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}
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func (cmd *baseCmd) Err() error {
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if cmd.err != nil {
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return cmd.err
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}
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return nil
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}
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func (cmd *baseCmd) args() []interface{} {
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return cmd._args
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}
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func (cmd *baseCmd) arg(pos int) string {
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if len(cmd._args) > pos {
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if s, ok := cmd._args[pos].(string); ok {
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return s
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}
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}
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return ""
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}
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func (cmd *baseCmd) readTimeout() *time.Duration {
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return cmd._readTimeout
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}
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func (cmd *baseCmd) setReadTimeout(d time.Duration) {
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cmd._readTimeout = &d
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}
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func (cmd *baseCmd) setErr(e error) {
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cmd.err = e
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}
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func newBaseCmd(args []interface{}) baseCmd {
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return baseCmd{_args: args}
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}
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//------------------------------------------------------------------------------
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type Cmd struct {
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baseCmd
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val interface{}
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}
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func NewCmd(args ...interface{}) *Cmd {
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return &Cmd{
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baseCmd: newBaseCmd(args),
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}
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}
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func (cmd *Cmd) reset() {
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cmd.val = nil
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cmd.err = nil
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}
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func (cmd *Cmd) Val() interface{} {
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return cmd.val
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}
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func (cmd *Cmd) Result() (interface{}, error) {
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return cmd.val, cmd.err
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}
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func (cmd *Cmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *Cmd) readReply(cn *pool.Conn) error {
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val, err := readReply(cn, sliceParser)
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if err != nil {
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cmd.err = err
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return cmd.err
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}
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if b, ok := val.([]byte); ok {
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// Bytes must be copied, because underlying memory is reused.
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cmd.val = string(b)
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} else {
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cmd.val = val
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}
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return nil
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}
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//------------------------------------------------------------------------------
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type SliceCmd struct {
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baseCmd
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val []interface{}
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}
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func NewSliceCmd(args ...interface{}) *SliceCmd {
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cmd := newBaseCmd(args)
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return &SliceCmd{baseCmd: cmd}
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}
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func (cmd *SliceCmd) reset() {
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cmd.val = nil
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cmd.err = nil
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}
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func (cmd *SliceCmd) Val() []interface{} {
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return cmd.val
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}
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func (cmd *SliceCmd) Result() ([]interface{}, error) {
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return cmd.val, cmd.err
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}
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func (cmd *SliceCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *SliceCmd) readReply(cn *pool.Conn) error {
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v, err := readArrayReply(cn, sliceParser)
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if err != nil {
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cmd.err = err
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return err
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}
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cmd.val = v.([]interface{})
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return nil
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}
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//------------------------------------------------------------------------------
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type StatusCmd struct {
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baseCmd
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val string
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}
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func NewStatusCmd(args ...interface{}) *StatusCmd {
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cmd := newBaseCmd(args)
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return &StatusCmd{baseCmd: cmd}
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}
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func (cmd *StatusCmd) reset() {
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cmd.val = ""
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cmd.err = nil
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}
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func (cmd *StatusCmd) Val() string {
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return cmd.val
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}
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func (cmd *StatusCmd) Result() (string, error) {
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return cmd.val, cmd.err
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}
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func (cmd *StatusCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *StatusCmd) readReply(cn *pool.Conn) error {
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cmd.val, cmd.err = readStringReply(cn)
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return cmd.err
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}
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//------------------------------------------------------------------------------
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type IntCmd struct {
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baseCmd
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val int64
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}
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func NewIntCmd(args ...interface{}) *IntCmd {
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cmd := newBaseCmd(args)
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return &IntCmd{baseCmd: cmd}
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}
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func (cmd *IntCmd) reset() {
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cmd.val = 0
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cmd.err = nil
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}
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func (cmd *IntCmd) Val() int64 {
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return cmd.val
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}
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func (cmd *IntCmd) Result() (int64, error) {
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return cmd.val, cmd.err
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}
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func (cmd *IntCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *IntCmd) readReply(cn *pool.Conn) error {
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cmd.val, cmd.err = readIntReply(cn)
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return cmd.err
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}
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//------------------------------------------------------------------------------
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type DurationCmd struct {
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baseCmd
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val time.Duration
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precision time.Duration
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}
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func NewDurationCmd(precision time.Duration, args ...interface{}) *DurationCmd {
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cmd := newBaseCmd(args)
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return &DurationCmd{
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precision: precision,
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baseCmd: cmd,
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}
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}
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func (cmd *DurationCmd) reset() {
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cmd.val = 0
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cmd.err = nil
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}
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func (cmd *DurationCmd) Val() time.Duration {
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return cmd.val
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}
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func (cmd *DurationCmd) Result() (time.Duration, error) {
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return cmd.val, cmd.err
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}
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func (cmd *DurationCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *DurationCmd) readReply(cn *pool.Conn) error {
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n, err := readIntReply(cn)
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if err != nil {
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cmd.err = err
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return err
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}
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cmd.val = time.Duration(n) * cmd.precision
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return nil
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}
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//------------------------------------------------------------------------------
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type BoolCmd struct {
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baseCmd
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val bool
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}
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func NewBoolCmd(args ...interface{}) *BoolCmd {
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cmd := newBaseCmd(args)
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return &BoolCmd{baseCmd: cmd}
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}
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func (cmd *BoolCmd) reset() {
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cmd.val = false
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cmd.err = nil
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}
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func (cmd *BoolCmd) Val() bool {
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return cmd.val
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}
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func (cmd *BoolCmd) Result() (bool, error) {
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return cmd.val, cmd.err
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}
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func (cmd *BoolCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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var ok = []byte("OK")
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func (cmd *BoolCmd) readReply(cn *pool.Conn) error {
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v, err := readReply(cn, nil)
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// `SET key value NX` returns nil when key already exists. But
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// `SETNX key value` returns bool (0/1). So convert nil to bool.
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// TODO: is this okay?
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if err == Nil {
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cmd.val = false
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return nil
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}
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if err != nil {
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cmd.err = err
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return err
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}
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switch vv := v.(type) {
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case int64:
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cmd.val = vv == 1
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return nil
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case []byte:
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cmd.val = bytes.Equal(vv, ok)
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return nil
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default:
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return fmt.Errorf("got %T, wanted int64 or string", v)
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}
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}
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//------------------------------------------------------------------------------
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type StringCmd struct {
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baseCmd
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val []byte
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}
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func NewStringCmd(args ...interface{}) *StringCmd {
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cmd := newBaseCmd(args)
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return &StringCmd{baseCmd: cmd}
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}
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func (cmd *StringCmd) reset() {
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cmd.val = nil
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cmd.err = nil
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}
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func (cmd *StringCmd) Val() string {
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return bytesToString(cmd.val)
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}
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func (cmd *StringCmd) Result() (string, error) {
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return cmd.Val(), cmd.err
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}
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func (cmd *StringCmd) Bytes() ([]byte, error) {
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return cmd.val, cmd.err
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}
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func (cmd *StringCmd) Int64() (int64, error) {
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if cmd.err != nil {
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return 0, cmd.err
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}
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return strconv.ParseInt(cmd.Val(), 10, 64)
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}
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func (cmd *StringCmd) Uint64() (uint64, error) {
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if cmd.err != nil {
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return 0, cmd.err
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}
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return strconv.ParseUint(cmd.Val(), 10, 64)
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}
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func (cmd *StringCmd) Float64() (float64, error) {
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if cmd.err != nil {
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return 0, cmd.err
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}
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return strconv.ParseFloat(cmd.Val(), 64)
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}
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func (cmd *StringCmd) Scan(val interface{}) error {
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if cmd.err != nil {
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return cmd.err
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}
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return scan(cmd.val, val)
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}
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func (cmd *StringCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *StringCmd) readReply(cn *pool.Conn) error {
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b, err := readBytesReply(cn)
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if err != nil {
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cmd.err = err
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return err
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}
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new := make([]byte, len(b))
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copy(new, b)
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cmd.val = new
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return nil
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}
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//------------------------------------------------------------------------------
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type FloatCmd struct {
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baseCmd
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val float64
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}
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func NewFloatCmd(args ...interface{}) *FloatCmd {
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cmd := newBaseCmd(args)
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return &FloatCmd{baseCmd: cmd}
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}
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func (cmd *FloatCmd) reset() {
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cmd.val = 0
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cmd.err = nil
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}
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func (cmd *FloatCmd) Val() float64 {
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return cmd.val
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}
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func (cmd *FloatCmd) Result() (float64, error) {
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return cmd.Val(), cmd.Err()
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}
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func (cmd *FloatCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *FloatCmd) readReply(cn *pool.Conn) error {
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cmd.val, cmd.err = readFloatReply(cn)
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return cmd.err
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}
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//------------------------------------------------------------------------------
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type StringSliceCmd struct {
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baseCmd
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val []string
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}
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func NewStringSliceCmd(args ...interface{}) *StringSliceCmd {
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cmd := newBaseCmd(args)
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return &StringSliceCmd{baseCmd: cmd}
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}
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func (cmd *StringSliceCmd) reset() {
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cmd.val = nil
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cmd.err = nil
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}
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func (cmd *StringSliceCmd) Val() []string {
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return cmd.val
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}
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func (cmd *StringSliceCmd) Result() ([]string, error) {
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return cmd.Val(), cmd.Err()
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}
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func (cmd *StringSliceCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *StringSliceCmd) readReply(cn *pool.Conn) error {
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v, err := readArrayReply(cn, stringSliceParser)
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if err != nil {
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cmd.err = err
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return err
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}
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cmd.val = v.([]string)
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return nil
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}
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|
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//------------------------------------------------------------------------------
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type BoolSliceCmd struct {
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baseCmd
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val []bool
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}
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|
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func NewBoolSliceCmd(args ...interface{}) *BoolSliceCmd {
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cmd := newBaseCmd(args)
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return &BoolSliceCmd{baseCmd: cmd}
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}
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func (cmd *BoolSliceCmd) reset() {
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cmd.val = nil
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cmd.err = nil
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}
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|
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func (cmd *BoolSliceCmd) Val() []bool {
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return cmd.val
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}
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|
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func (cmd *BoolSliceCmd) Result() ([]bool, error) {
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return cmd.val, cmd.err
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}
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func (cmd *BoolSliceCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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|
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func (cmd *BoolSliceCmd) readReply(cn *pool.Conn) error {
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v, err := readArrayReply(cn, boolSliceParser)
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if err != nil {
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cmd.err = err
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return err
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}
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cmd.val = v.([]bool)
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return nil
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}
|
|
|
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//------------------------------------------------------------------------------
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|
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type StringStringMapCmd struct {
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baseCmd
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|
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val map[string]string
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}
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|
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func NewStringStringMapCmd(args ...interface{}) *StringStringMapCmd {
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cmd := newBaseCmd(args)
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return &StringStringMapCmd{baseCmd: cmd}
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}
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func (cmd *StringStringMapCmd) reset() {
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cmd.val = nil
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cmd.err = nil
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}
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func (cmd *StringStringMapCmd) Val() map[string]string {
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return cmd.val
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}
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func (cmd *StringStringMapCmd) Result() (map[string]string, error) {
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return cmd.val, cmd.err
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}
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func (cmd *StringStringMapCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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|
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func (cmd *StringStringMapCmd) readReply(cn *pool.Conn) error {
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v, err := readArrayReply(cn, stringStringMapParser)
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if err != nil {
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cmd.err = err
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return err
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}
|
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cmd.val = v.(map[string]string)
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return nil
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}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
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type StringIntMapCmd struct {
|
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baseCmd
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|
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val map[string]int64
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}
|
|
|
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func NewStringIntMapCmd(args ...interface{}) *StringIntMapCmd {
|
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cmd := newBaseCmd(args)
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return &StringIntMapCmd{baseCmd: cmd}
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}
|
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|
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func (cmd *StringIntMapCmd) Val() map[string]int64 {
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return cmd.val
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}
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|
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func (cmd *StringIntMapCmd) Result() (map[string]int64, error) {
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return cmd.val, cmd.err
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}
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|
|
func (cmd *StringIntMapCmd) String() string {
|
|
return cmdString(cmd, cmd.val)
|
|
}
|
|
|
|
func (cmd *StringIntMapCmd) reset() {
|
|
cmd.val = nil
|
|
cmd.err = nil
|
|
}
|
|
|
|
func (cmd *StringIntMapCmd) readReply(cn *pool.Conn) error {
|
|
v, err := readArrayReply(cn, stringIntMapParser)
|
|
if err != nil {
|
|
cmd.err = err
|
|
return err
|
|
}
|
|
cmd.val = v.(map[string]int64)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type ZSliceCmd struct {
|
|
baseCmd
|
|
|
|
val []Z
|
|
}
|
|
|
|
func NewZSliceCmd(args ...interface{}) *ZSliceCmd {
|
|
cmd := newBaseCmd(args)
|
|
return &ZSliceCmd{baseCmd: cmd}
|
|
}
|
|
|
|
func (cmd *ZSliceCmd) reset() {
|
|
cmd.val = nil
|
|
cmd.err = nil
|
|
}
|
|
|
|
func (cmd *ZSliceCmd) Val() []Z {
|
|
return cmd.val
|
|
}
|
|
|
|
func (cmd *ZSliceCmd) Result() ([]Z, error) {
|
|
return cmd.val, cmd.err
|
|
}
|
|
|
|
func (cmd *ZSliceCmd) String() string {
|
|
return cmdString(cmd, cmd.val)
|
|
}
|
|
|
|
func (cmd *ZSliceCmd) readReply(cn *pool.Conn) error {
|
|
v, err := readArrayReply(cn, zSliceParser)
|
|
if err != nil {
|
|
cmd.err = err
|
|
return err
|
|
}
|
|
cmd.val = v.([]Z)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type ScanCmd struct {
|
|
baseCmd
|
|
|
|
page []string
|
|
cursor uint64
|
|
}
|
|
|
|
func NewScanCmd(args ...interface{}) *ScanCmd {
|
|
cmd := newBaseCmd(args)
|
|
return &ScanCmd{
|
|
baseCmd: cmd,
|
|
}
|
|
}
|
|
|
|
func (cmd *ScanCmd) reset() {
|
|
cmd.cursor = 0
|
|
cmd.page = nil
|
|
cmd.err = nil
|
|
}
|
|
|
|
func (cmd *ScanCmd) Val() (keys []string, cursor uint64) {
|
|
return cmd.page, cmd.cursor
|
|
}
|
|
|
|
func (cmd *ScanCmd) Result() (keys []string, cursor uint64, err error) {
|
|
return cmd.page, cmd.cursor, cmd.err
|
|
}
|
|
|
|
func (cmd *ScanCmd) String() string {
|
|
return cmdString(cmd, cmd.page)
|
|
}
|
|
|
|
func (cmd *ScanCmd) readReply(cn *pool.Conn) error {
|
|
page, cursor, err := readScanReply(cn)
|
|
if err != nil {
|
|
cmd.err = err
|
|
return cmd.err
|
|
}
|
|
cmd.page = page
|
|
cmd.cursor = cursor
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type ClusterNode struct {
|
|
Id string
|
|
Addr string
|
|
}
|
|
|
|
type ClusterSlot struct {
|
|
Start int
|
|
End int
|
|
Nodes []ClusterNode
|
|
}
|
|
|
|
type ClusterSlotsCmd struct {
|
|
baseCmd
|
|
|
|
val []ClusterSlot
|
|
}
|
|
|
|
func NewClusterSlotsCmd(args ...interface{}) *ClusterSlotsCmd {
|
|
cmd := newBaseCmd(args)
|
|
return &ClusterSlotsCmd{baseCmd: cmd}
|
|
}
|
|
|
|
func (cmd *ClusterSlotsCmd) Val() []ClusterSlot {
|
|
return cmd.val
|
|
}
|
|
|
|
func (cmd *ClusterSlotsCmd) Result() ([]ClusterSlot, error) {
|
|
return cmd.Val(), cmd.Err()
|
|
}
|
|
|
|
func (cmd *ClusterSlotsCmd) String() string {
|
|
return cmdString(cmd, cmd.val)
|
|
}
|
|
|
|
func (cmd *ClusterSlotsCmd) reset() {
|
|
cmd.val = nil
|
|
cmd.err = nil
|
|
}
|
|
|
|
func (cmd *ClusterSlotsCmd) readReply(cn *pool.Conn) error {
|
|
v, err := readArrayReply(cn, clusterSlotsParser)
|
|
if err != nil {
|
|
cmd.err = err
|
|
return err
|
|
}
|
|
cmd.val = v.([]ClusterSlot)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
// GeoLocation is used with GeoAdd to add geospatial location.
|
|
type GeoLocation struct {
|
|
Name string
|
|
Longitude, Latitude, Dist float64
|
|
GeoHash int64
|
|
}
|
|
|
|
// GeoRadiusQuery is used with GeoRadius to query geospatial index.
|
|
type GeoRadiusQuery struct {
|
|
Radius float64
|
|
// Can be m, km, ft, or mi. Default is km.
|
|
Unit string
|
|
WithCoord bool
|
|
WithDist bool
|
|
WithGeoHash bool
|
|
Count int
|
|
// Can be ASC or DESC. Default is no sort order.
|
|
Sort string
|
|
}
|
|
|
|
type GeoLocationCmd struct {
|
|
baseCmd
|
|
|
|
q *GeoRadiusQuery
|
|
locations []GeoLocation
|
|
}
|
|
|
|
func NewGeoLocationCmd(q *GeoRadiusQuery, args ...interface{}) *GeoLocationCmd {
|
|
args = append(args, q.Radius)
|
|
if q.Unit != "" {
|
|
args = append(args, q.Unit)
|
|
} else {
|
|
args = append(args, "km")
|
|
}
|
|
if q.WithCoord {
|
|
args = append(args, "WITHCOORD")
|
|
}
|
|
if q.WithDist {
|
|
args = append(args, "WITHDIST")
|
|
}
|
|
if q.WithGeoHash {
|
|
args = append(args, "WITHHASH")
|
|
}
|
|
if q.Count > 0 {
|
|
args = append(args, "COUNT", q.Count)
|
|
}
|
|
if q.Sort != "" {
|
|
args = append(args, q.Sort)
|
|
}
|
|
cmd := newBaseCmd(args)
|
|
return &GeoLocationCmd{
|
|
baseCmd: cmd,
|
|
q: q,
|
|
}
|
|
}
|
|
|
|
func (cmd *GeoLocationCmd) reset() {
|
|
cmd.locations = nil
|
|
cmd.err = nil
|
|
}
|
|
|
|
func (cmd *GeoLocationCmd) Val() []GeoLocation {
|
|
return cmd.locations
|
|
}
|
|
|
|
func (cmd *GeoLocationCmd) Result() ([]GeoLocation, error) {
|
|
return cmd.locations, cmd.err
|
|
}
|
|
|
|
func (cmd *GeoLocationCmd) String() string {
|
|
return cmdString(cmd, cmd.locations)
|
|
}
|
|
|
|
func (cmd *GeoLocationCmd) readReply(cn *pool.Conn) error {
|
|
reply, err := readArrayReply(cn, newGeoLocationSliceParser(cmd.q))
|
|
if err != nil {
|
|
cmd.err = err
|
|
return err
|
|
}
|
|
cmd.locations = reply.([]GeoLocation)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type CommandInfo struct {
|
|
Name string
|
|
Arity int8
|
|
Flags []string
|
|
FirstKeyPos int8
|
|
LastKeyPos int8
|
|
StepCount int8
|
|
ReadOnly bool
|
|
}
|
|
|
|
type CommandsInfoCmd struct {
|
|
baseCmd
|
|
|
|
val map[string]*CommandInfo
|
|
}
|
|
|
|
func NewCommandsInfoCmd(args ...interface{}) *CommandsInfoCmd {
|
|
cmd := newBaseCmd(args)
|
|
return &CommandsInfoCmd{baseCmd: cmd}
|
|
}
|
|
|
|
func (cmd *CommandsInfoCmd) Val() map[string]*CommandInfo {
|
|
return cmd.val
|
|
}
|
|
|
|
func (cmd *CommandsInfoCmd) Result() (map[string]*CommandInfo, error) {
|
|
return cmd.Val(), cmd.Err()
|
|
}
|
|
|
|
func (cmd *CommandsInfoCmd) String() string {
|
|
return cmdString(cmd, cmd.val)
|
|
}
|
|
|
|
func (cmd *CommandsInfoCmd) reset() {
|
|
cmd.val = nil
|
|
cmd.err = nil
|
|
}
|
|
|
|
func (cmd *CommandsInfoCmd) readReply(cn *pool.Conn) error {
|
|
v, err := readArrayReply(cn, commandInfoSliceParser)
|
|
if err != nil {
|
|
cmd.err = err
|
|
return err
|
|
}
|
|
cmd.val = v.(map[string]*CommandInfo)
|
|
return nil
|
|
}
|