mirror of https://github.com/go-redis/redis.git
950 lines
18 KiB
Go
950 lines
18 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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"github.com/go-redis/redis/internal"
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"github.com/go-redis/redis/internal/pool"
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"github.com/go-redis/redis/internal/proto"
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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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name() string
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readReply(*pool.Conn) error
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setErr(error)
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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 writeCmd(cn *pool.Conn, cmds ...Cmder) error {
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cn.Wb.Reset()
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for _, cmd := range cmds {
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if err := cn.Wb.Append(cmd.args()); err != nil {
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return err
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}
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}
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_, err := cn.Write(cn.Wb.Bytes())
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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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func cmdFirstKeyPos(cmd Cmder, info *CommandInfo) int {
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switch cmd.name() {
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case "eval", "evalsha":
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if cmd.arg(2) != "0" {
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return 3
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} else {
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return -1
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}
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case "publish":
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return 1
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}
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if info == nil {
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internal.Logf("info for cmd=%s not found", cmd.name())
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return -1
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}
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return int(info.FirstKeyPos)
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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 pos < 0 || pos >= len(cmd._args) {
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return ""
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}
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s, _ := cmd._args[pos].(string)
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return s
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}
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func (cmd *baseCmd) name() string {
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if len(cmd._args) > 0 {
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// Cmd name must be lower cased.
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s := internal.ToLower(cmd.arg(0))
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cmd._args[0] = s
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return s
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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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//------------------------------------------------------------------------------
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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: baseCmd{_args: args},
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}
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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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cmd.val, cmd.err = cn.Rd.ReadReply(sliceParser)
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if cmd.err != nil {
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return cmd.err
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}
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if b, ok := cmd.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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}
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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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return &SliceCmd{
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baseCmd: baseCmd{_args: args},
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}
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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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var v interface{}
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v, cmd.err = cn.Rd.ReadArrayReply(sliceParser)
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if cmd.err != nil {
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return cmd.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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return &StatusCmd{
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baseCmd: baseCmd{_args: args},
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}
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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 = cn.Rd.ReadStringReply()
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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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return &IntCmd{
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baseCmd: baseCmd{_args: args},
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}
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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 = cn.Rd.ReadIntReply()
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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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return &DurationCmd{
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baseCmd: baseCmd{_args: args},
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precision: precision,
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}
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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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var n int64
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n, cmd.err = cn.Rd.ReadIntReply()
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if cmd.err != nil {
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return cmd.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 TimeCmd struct {
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baseCmd
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val time.Time
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}
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func NewTimeCmd(args ...interface{}) *TimeCmd {
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return &TimeCmd{
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baseCmd: baseCmd{_args: args},
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}
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}
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func (cmd *TimeCmd) Val() time.Time {
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return cmd.val
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}
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func (cmd *TimeCmd) Result() (time.Time, error) {
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return cmd.val, cmd.err
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}
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func (cmd *TimeCmd) String() string {
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return cmdString(cmd, cmd.val)
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}
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func (cmd *TimeCmd) readReply(cn *pool.Conn) error {
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var v interface{}
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v, cmd.err = cn.Rd.ReadArrayReply(timeParser)
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if cmd.err != nil {
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return cmd.err
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}
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cmd.val = v.(time.Time)
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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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return &BoolCmd{
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baseCmd: baseCmd{_args: args},
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}
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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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var v interface{}
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v, cmd.err = cn.Rd.ReadReply(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 cmd.err == Nil {
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cmd.val = false
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cmd.err = nil
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return nil
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}
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if cmd.err != nil {
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return cmd.err
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}
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switch v := v.(type) {
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case int64:
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cmd.val = v == 1
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return nil
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case []byte:
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cmd.val = bytes.Equal(v, ok)
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return nil
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default:
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cmd.err = fmt.Errorf("got %T, wanted int64 or string", v)
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return cmd.err
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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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return &StringCmd{
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baseCmd: baseCmd{_args: args},
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}
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}
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func (cmd *StringCmd) Val() string {
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return internal.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 proto.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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cmd.val, cmd.err = cn.Rd.ReadBytesReply()
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return cmd.err
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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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return &FloatCmd{
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baseCmd: baseCmd{_args: args},
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}
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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 = cn.Rd.ReadFloatReply()
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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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return &StringSliceCmd{
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baseCmd: baseCmd{_args: args},
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}
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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) ScanSlice(container interface{}) error {
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return proto.ScanSlice(cmd.Val(), container)
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}
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func (cmd *StringSliceCmd) readReply(cn *pool.Conn) error {
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var v interface{}
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v, cmd.err = cn.Rd.ReadArrayReply(stringSliceParser)
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if cmd.err != nil {
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return cmd.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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type BoolSliceCmd struct {
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baseCmd
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val []bool
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}
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func NewBoolSliceCmd(args ...interface{}) *BoolSliceCmd {
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return &BoolSliceCmd{
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baseCmd: baseCmd{_args: args},
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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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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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func (cmd *BoolSliceCmd) readReply(cn *pool.Conn) error {
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var v interface{}
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v, cmd.err = cn.Rd.ReadArrayReply(boolSliceParser)
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if cmd.err != nil {
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return cmd.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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type StringStringMapCmd struct {
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baseCmd
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val map[string]string
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}
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func NewStringStringMapCmd(args ...interface{}) *StringStringMapCmd {
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return &StringStringMapCmd{
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baseCmd: baseCmd{_args: args},
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}
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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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func (cmd *StringStringMapCmd) readReply(cn *pool.Conn) error {
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var v interface{}
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v, cmd.err = cn.Rd.ReadArrayReply(stringStringMapParser)
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if cmd.err != nil {
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return cmd.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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//------------------------------------------------------------------------------
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type StringIntMapCmd struct {
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baseCmd
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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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return &StringIntMapCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
}
|
|
}
|
|
|
|
func (cmd *StringIntMapCmd) Val() map[string]int64 {
|
|
return cmd.val
|
|
}
|
|
|
|
func (cmd *StringIntMapCmd) Result() (map[string]int64, error) {
|
|
return cmd.val, cmd.err
|
|
}
|
|
|
|
func (cmd *StringIntMapCmd) String() string {
|
|
return cmdString(cmd, cmd.val)
|
|
}
|
|
|
|
func (cmd *StringIntMapCmd) readReply(cn *pool.Conn) error {
|
|
var v interface{}
|
|
v, cmd.err = cn.Rd.ReadArrayReply(stringIntMapParser)
|
|
if cmd.err != nil {
|
|
return cmd.err
|
|
}
|
|
cmd.val = v.(map[string]int64)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type ZSliceCmd struct {
|
|
baseCmd
|
|
|
|
val []Z
|
|
}
|
|
|
|
func NewZSliceCmd(args ...interface{}) *ZSliceCmd {
|
|
return &ZSliceCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
}
|
|
}
|
|
|
|
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 {
|
|
var v interface{}
|
|
v, cmd.err = cn.Rd.ReadArrayReply(zSliceParser)
|
|
if cmd.err != nil {
|
|
return cmd.err
|
|
}
|
|
cmd.val = v.([]Z)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type ScanCmd struct {
|
|
baseCmd
|
|
|
|
page []string
|
|
cursor uint64
|
|
|
|
process func(cmd Cmder) error
|
|
}
|
|
|
|
func NewScanCmd(process func(cmd Cmder) error, args ...interface{}) *ScanCmd {
|
|
return &ScanCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
process: process,
|
|
}
|
|
}
|
|
|
|
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 {
|
|
cmd.page, cmd.cursor, cmd.err = cn.Rd.ReadScanReply()
|
|
return cmd.err
|
|
}
|
|
|
|
// Iterator creates a new ScanIterator.
|
|
func (cmd *ScanCmd) Iterator() *ScanIterator {
|
|
return &ScanIterator{
|
|
cmd: cmd,
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
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 {
|
|
return &ClusterSlotsCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
}
|
|
}
|
|
|
|
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) readReply(cn *pool.Conn) error {
|
|
var v interface{}
|
|
v, cmd.err = cn.Rd.ReadArrayReply(clusterSlotsParser)
|
|
if cmd.err != nil {
|
|
return cmd.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)
|
|
}
|
|
return &GeoLocationCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
q: q,
|
|
}
|
|
}
|
|
|
|
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 {
|
|
var v interface{}
|
|
v, cmd.err = cn.Rd.ReadArrayReply(newGeoLocationSliceParser(cmd.q))
|
|
if cmd.err != nil {
|
|
return cmd.err
|
|
}
|
|
cmd.locations = v.([]GeoLocation)
|
|
return nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type GeoPos struct {
|
|
Longitude, Latitude float64
|
|
}
|
|
|
|
type GeoPosCmd struct {
|
|
baseCmd
|
|
|
|
positions []*GeoPos
|
|
}
|
|
|
|
func NewGeoPosCmd(args ...interface{}) *GeoPosCmd {
|
|
return &GeoPosCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
}
|
|
}
|
|
|
|
func (cmd *GeoPosCmd) Val() []*GeoPos {
|
|
return cmd.positions
|
|
}
|
|
|
|
func (cmd *GeoPosCmd) Result() ([]*GeoPos, error) {
|
|
return cmd.Val(), cmd.Err()
|
|
}
|
|
|
|
func (cmd *GeoPosCmd) String() string {
|
|
return cmdString(cmd, cmd.positions)
|
|
}
|
|
|
|
func (cmd *GeoPosCmd) readReply(cn *pool.Conn) error {
|
|
var v interface{}
|
|
v, cmd.err = cn.Rd.ReadArrayReply(geoPosSliceParser)
|
|
if cmd.err != nil {
|
|
return cmd.err
|
|
}
|
|
cmd.positions = v.([]*GeoPos)
|
|
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 {
|
|
return &CommandsInfoCmd{
|
|
baseCmd: baseCmd{_args: args},
|
|
}
|
|
}
|
|
|
|
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) readReply(cn *pool.Conn) error {
|
|
var v interface{}
|
|
v, cmd.err = cn.Rd.ReadArrayReply(commandInfoSliceParser)
|
|
if cmd.err != nil {
|
|
return cmd.err
|
|
}
|
|
cmd.val = v.(map[string]*CommandInfo)
|
|
return nil
|
|
}
|