mirror of https://github.com/ledisdb/ledisdb.git
820 lines
14 KiB
Go
820 lines
14 KiB
Go
package server
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import (
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"errors"
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"github.com/siddontang/go/hack"
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"github.com/siddontang/go/num"
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"github.com/siddontang/ledisdb/ledis"
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"github.com/siddontang/ledisdb/store"
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"math"
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"strconv"
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"strings"
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)
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//for simple implementation, we only support int64 score
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var errScoreOverflow = errors.New("zset score overflow")
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func zaddCommand(c *client) error {
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args := c.args
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if len(args) < 3 {
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return ErrCmdParams
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}
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key := args[0]
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if len(args[1:])&1 != 0 {
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return ErrCmdParams
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}
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args = args[1:]
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params := make([]ledis.ScorePair, len(args)>>1)
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for i := 0; i < len(params); i++ {
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score, err := ledis.StrInt64(args[2*i], nil)
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if err != nil {
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return ErrValue
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}
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params[i].Score = score
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params[i].Member = args[2*i+1]
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}
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n, err := c.db.ZAdd(key, params...)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zcardCommand(c *client) error {
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args := c.args
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if len(args) != 1 {
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return ErrCmdParams
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}
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if n, err := c.db.ZCard(args[0]); err != nil {
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return err
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} else {
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c.resp.writeInteger(n)
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}
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return nil
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}
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func zscoreCommand(c *client) error {
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args := c.args
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if len(args) != 2 {
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return ErrCmdParams
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}
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if s, err := c.db.ZScore(args[0], args[1]); err != nil {
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if err == ledis.ErrScoreMiss {
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c.resp.writeBulk(nil)
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} else {
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return err
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}
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} else {
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c.resp.writeBulk(num.FormatInt64ToSlice(s))
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}
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return nil
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}
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func zremCommand(c *client) error {
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args := c.args
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if len(args) < 2 {
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return ErrCmdParams
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}
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n, err := c.db.ZRem(args[0], args[1:]...)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zincrbyCommand(c *client) error {
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args := c.args
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if len(args) != 3 {
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return ErrCmdParams
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}
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key := args[0]
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delta, err := ledis.StrInt64(args[1], nil)
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if err != nil {
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return ErrValue
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}
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v, err := c.db.ZIncrBy(key, delta, args[2])
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if err == nil {
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c.resp.writeBulk(num.FormatInt64ToSlice(v))
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}
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return err
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}
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func zparseScoreRange(minBuf []byte, maxBuf []byte) (min int64, max int64, err error) {
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if strings.ToLower(hack.String(minBuf)) == "-inf" {
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min = math.MinInt64
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} else {
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if len(minBuf) == 0 {
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err = ErrCmdParams
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return
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}
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var lopen bool = false
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if minBuf[0] == '(' {
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lopen = true
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minBuf = minBuf[1:]
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}
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min, err = ledis.StrInt64(minBuf, nil)
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if err != nil {
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err = ErrValue
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return
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}
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if min <= ledis.MinScore || min >= ledis.MaxScore {
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err = errScoreOverflow
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return
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}
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if lopen {
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min++
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}
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}
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if strings.ToLower(hack.String(maxBuf)) == "+inf" {
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max = math.MaxInt64
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} else {
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var ropen = false
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if len(maxBuf) == 0 {
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err = ErrCmdParams
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return
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}
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if maxBuf[0] == '(' {
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ropen = true
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maxBuf = maxBuf[1:]
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}
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if maxBuf[0] == '(' {
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ropen = true
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maxBuf = maxBuf[1:]
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}
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max, err = ledis.StrInt64(maxBuf, nil)
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if err != nil {
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err = ErrValue
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return
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}
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if max <= ledis.MinScore || max >= ledis.MaxScore {
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err = errScoreOverflow
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return
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}
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if ropen {
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max--
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}
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}
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return
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}
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func zcountCommand(c *client) error {
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args := c.args
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if len(args) != 3 {
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return ErrCmdParams
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}
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min, max, err := zparseScoreRange(args[1], args[2])
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if err != nil {
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return ErrValue
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}
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if min > max {
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c.resp.writeInteger(0)
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return nil
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}
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if n, err := c.db.ZCount(args[0], min, max); err != nil {
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return err
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} else {
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c.resp.writeInteger(n)
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}
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return nil
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}
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func zrankCommand(c *client) error {
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args := c.args
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if len(args) != 2 {
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return ErrCmdParams
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}
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if n, err := c.db.ZRank(args[0], args[1]); err != nil {
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return err
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} else if n == -1 {
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c.resp.writeBulk(nil)
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} else {
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c.resp.writeInteger(n)
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}
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return nil
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}
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func zrevrankCommand(c *client) error {
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args := c.args
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if len(args) != 2 {
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return ErrCmdParams
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}
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if n, err := c.db.ZRevRank(args[0], args[1]); err != nil {
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return err
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} else if n == -1 {
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c.resp.writeBulk(nil)
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} else {
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c.resp.writeInteger(n)
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}
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return nil
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}
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func zremrangebyrankCommand(c *client) error {
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args := c.args
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if len(args) != 3 {
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return ErrCmdParams
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}
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key := args[0]
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start, stop, err := zparseRange(c, args[1], args[2])
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if err != nil {
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return ErrValue
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}
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n, err := c.db.ZRemRangeByRank(key, start, stop)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zremrangebyscoreCommand(c *client) error {
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args := c.args
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if len(args) != 3 {
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return ErrCmdParams
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}
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key := args[0]
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min, max, err := zparseScoreRange(args[1], args[2])
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if err != nil {
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return err
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}
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n, err := c.db.ZRemRangeByScore(key, min, max)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zparseRange(c *client, a1 []byte, a2 []byte) (start int, stop int, err error) {
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if start, err = strconv.Atoi(hack.String(a1)); err != nil {
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return
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}
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if stop, err = strconv.Atoi(hack.String(a2)); err != nil {
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return
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}
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return
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}
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func zrangeGeneric(c *client, reverse bool) error {
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args := c.args
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if len(args) < 3 {
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return ErrCmdParams
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}
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key := args[0]
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start, stop, err := zparseRange(c, args[1], args[2])
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if err != nil {
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return ErrValue
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}
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args = args[3:]
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var withScores bool = false
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if len(args) > 0 {
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if len(args) != 1 {
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return ErrCmdParams
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}
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if strings.ToLower(hack.String(args[0])) == "withscores" {
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withScores = true
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} else {
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return ErrSyntax
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}
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}
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if datas, err := c.db.ZRangeGeneric(key, start, stop, reverse); err != nil {
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return err
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} else {
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c.resp.writeScorePairArray(datas, withScores)
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}
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return nil
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}
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func zrangeCommand(c *client) error {
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return zrangeGeneric(c, false)
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}
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func zrevrangeCommand(c *client) error {
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return zrangeGeneric(c, true)
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}
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func zrangebyscoreGeneric(c *client, reverse bool) error {
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args := c.args
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if len(args) < 3 {
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return ErrCmdParams
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}
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key := args[0]
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var minScore, maxScore []byte
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if !reverse {
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minScore, maxScore = args[1], args[2]
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} else {
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minScore, maxScore = args[2], args[1]
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}
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min, max, err := zparseScoreRange(minScore, maxScore)
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if err != nil {
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return err
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}
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args = args[3:]
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var withScores bool = false
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if len(args) > 0 {
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if strings.ToLower(hack.String(args[0])) == "withscores" {
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withScores = true
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args = args[1:]
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}
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}
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var offset int = 0
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var count int = -1
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if len(args) > 0 {
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if len(args) != 3 {
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return ErrCmdParams
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}
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if strings.ToLower(hack.String(args[0])) != "limit" {
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return ErrSyntax
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}
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if offset, err = strconv.Atoi(hack.String(args[1])); err != nil {
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return ErrValue
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}
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if count, err = strconv.Atoi(hack.String(args[2])); err != nil {
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return ErrValue
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}
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}
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if offset < 0 {
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//for ledis, if offset < 0, a empty will return
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//so here we directly return a empty array
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c.resp.writeArray([]interface{}{})
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return nil
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}
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if datas, err := c.db.ZRangeByScoreGeneric(key, min, max, offset, count, reverse); err != nil {
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return err
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} else {
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c.resp.writeScorePairArray(datas, withScores)
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}
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return nil
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}
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func zrangebyscoreCommand(c *client) error {
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return zrangebyscoreGeneric(c, false)
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}
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func zrevrangebyscoreCommand(c *client) error {
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return zrangebyscoreGeneric(c, true)
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}
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func zclearCommand(c *client) error {
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args := c.args
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if len(args) != 1 {
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return ErrCmdParams
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}
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n, err := c.db.ZClear(args[0])
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zmclearCommand(c *client) error {
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args := c.args
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if len(args) < 1 {
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return ErrCmdParams
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}
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n, err := c.db.ZMclear(args...)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zexpireCommand(c *client) error {
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args := c.args
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if len(args) != 2 {
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return ErrCmdParams
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}
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duration, err := ledis.StrInt64(args[1], nil)
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if err != nil {
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return ErrValue
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}
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v, err := c.db.ZExpire(args[0], duration)
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if err == nil {
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c.resp.writeInteger(v)
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}
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return err
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}
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func zexpireAtCommand(c *client) error {
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args := c.args
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if len(args) != 2 {
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return ErrCmdParams
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}
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when, err := ledis.StrInt64(args[1], nil)
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if err != nil {
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return ErrValue
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}
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v, err := c.db.ZExpireAt(args[0], when)
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if err == nil {
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c.resp.writeInteger(v)
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}
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return err
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}
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func zttlCommand(c *client) error {
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args := c.args
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if len(args) != 1 {
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return ErrCmdParams
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}
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if v, err := c.db.ZTTL(args[0]); err != nil {
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return err
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} else {
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c.resp.writeInteger(v)
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}
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return nil
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}
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func zpersistCommand(c *client) error {
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args := c.args
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if len(args) != 1 {
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return ErrCmdParams
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}
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n, err := c.db.ZPersist(args[0])
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zparseZsetoptStore(args [][]byte) (destKey []byte, srcKeys [][]byte, weights []int64, aggregate byte, err error) {
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destKey = args[0]
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nKeys, err := strconv.Atoi(hack.String(args[1]))
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if err != nil {
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err = ErrValue
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return
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}
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args = args[2:]
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if len(args) < nKeys {
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err = ErrSyntax
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return
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}
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srcKeys = args[:nKeys]
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args = args[nKeys:]
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var weightsFlag = false
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var aggregateFlag = false
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for len(args) > 0 {
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if strings.ToLower(hack.String(args[0])) == "weights" {
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if weightsFlag {
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err = ErrSyntax
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return
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}
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args = args[1:]
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if len(args) < nKeys {
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err = ErrSyntax
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return
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}
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weights = make([]int64, nKeys)
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for i, arg := range args[:nKeys] {
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if weights[i], err = ledis.StrInt64(arg, nil); err != nil {
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err = ErrValue
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return
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}
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}
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args = args[nKeys:]
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weightsFlag = true
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} else if strings.ToLower(hack.String(args[0])) == "aggregate" {
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if aggregateFlag {
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err = ErrSyntax
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return
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}
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if len(args) < 2 {
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err = ErrSyntax
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return
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}
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if strings.ToLower(hack.String(args[1])) == "sum" {
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aggregate = ledis.AggregateSum
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} else if strings.ToLower(hack.String(args[1])) == "min" {
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aggregate = ledis.AggregateMin
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} else if strings.ToLower(hack.String(args[1])) == "max" {
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aggregate = ledis.AggregateMax
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} else {
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err = ErrSyntax
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return
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}
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args = args[2:]
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aggregateFlag = true
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} else {
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err = ErrSyntax
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return
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}
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}
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if !aggregateFlag {
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aggregate = ledis.AggregateSum
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}
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return
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}
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func zunionstoreCommand(c *client) error {
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args := c.args
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if len(args) < 2 {
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return ErrCmdParams
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}
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destKey, srcKeys, weights, aggregate, err := zparseZsetoptStore(args)
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if err != nil {
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return err
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}
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n, err := c.db.ZUnionStore(destKey, srcKeys, weights, aggregate)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zinterstoreCommand(c *client) error {
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args := c.args
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if len(args) < 2 {
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return ErrCmdParams
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}
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destKey, srcKeys, weights, aggregate, err := zparseZsetoptStore(args)
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if err != nil {
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return err
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}
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n, err := c.db.ZInterStore(destKey, srcKeys, weights, aggregate)
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if err == nil {
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c.resp.writeInteger(n)
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}
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return err
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}
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func zxscanCommand(c *client) error {
|
|
key, match, count, err := parseScanArgs(c)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ay, err := c.db.ZScan(key, count, false, match); err != nil {
|
|
return err
|
|
} else {
|
|
data := make([]interface{}, 2)
|
|
if len(ay) < count {
|
|
data[0] = []byte("")
|
|
} else {
|
|
data[0] = ay[len(ay)-1]
|
|
}
|
|
data[1] = ay
|
|
c.resp.writeArray(data)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func zparseMemberRange(minBuf []byte, maxBuf []byte) (min []byte, max []byte, rangeType uint8, err error) {
|
|
rangeType = store.RangeClose
|
|
if strings.ToLower(hack.String(minBuf)) == "-" {
|
|
min = nil
|
|
} else {
|
|
if len(minBuf) == 0 {
|
|
err = ErrCmdParams
|
|
return
|
|
}
|
|
|
|
if minBuf[0] == '(' {
|
|
rangeType |= store.RangeLOpen
|
|
min = minBuf[1:]
|
|
} else if minBuf[0] == '[' {
|
|
min = minBuf[1:]
|
|
} else {
|
|
err = ErrCmdParams
|
|
return
|
|
}
|
|
}
|
|
|
|
if strings.ToLower(hack.String(maxBuf)) == "+" {
|
|
max = nil
|
|
} else {
|
|
if len(maxBuf) == 0 {
|
|
err = ErrCmdParams
|
|
return
|
|
}
|
|
if maxBuf[0] == '(' {
|
|
rangeType |= store.RangeROpen
|
|
max = maxBuf[1:]
|
|
} else if maxBuf[0] == '[' {
|
|
max = maxBuf[1:]
|
|
} else {
|
|
err = ErrCmdParams
|
|
return
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func zrangebylexCommand(c *client) error {
|
|
args := c.args
|
|
if len(args) != 3 && len(args) != 6 {
|
|
return ErrCmdParams
|
|
}
|
|
|
|
min, max, rangeType, err := zparseMemberRange(args[1], args[2])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var offset int = 0
|
|
var count int = -1
|
|
|
|
if len(args) == 6 {
|
|
if strings.ToLower(hack.String(args[3])) != "limit" {
|
|
return ErrSyntax
|
|
}
|
|
|
|
if offset, err = strconv.Atoi(hack.String(args[4])); err != nil {
|
|
return ErrValue
|
|
}
|
|
|
|
if count, err = strconv.Atoi(hack.String(args[5])); err != nil {
|
|
return ErrValue
|
|
}
|
|
}
|
|
|
|
key := args[0]
|
|
if ay, err := c.db.ZRangeByLex(key, min, max, rangeType, offset, count); err != nil {
|
|
return err
|
|
} else {
|
|
c.resp.writeSliceArray(ay)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func zremrangebylexCommand(c *client) error {
|
|
args := c.args
|
|
if len(args) != 3 {
|
|
return ErrCmdParams
|
|
}
|
|
|
|
min, max, rangeType, err := zparseMemberRange(args[1], args[2])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
key := args[0]
|
|
if n, err := c.db.ZRemRangeByLex(key, min, max, rangeType); err != nil {
|
|
return err
|
|
} else {
|
|
c.resp.writeInteger(n)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func zlexcountCommand(c *client) error {
|
|
args := c.args
|
|
if len(args) != 3 {
|
|
return ErrCmdParams
|
|
}
|
|
|
|
min, max, rangeType, err := zparseMemberRange(args[1], args[2])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
key := args[0]
|
|
if n, err := c.db.ZLexCount(key, min, max, rangeType); err != nil {
|
|
return err
|
|
} else {
|
|
c.resp.writeInteger(n)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func init() {
|
|
register("zadd", zaddCommand)
|
|
register("zcard", zcardCommand)
|
|
register("zcount", zcountCommand)
|
|
register("zincrby", zincrbyCommand)
|
|
register("zrange", zrangeCommand)
|
|
register("zrangebyscore", zrangebyscoreCommand)
|
|
register("zrank", zrankCommand)
|
|
register("zrem", zremCommand)
|
|
register("zremrangebyrank", zremrangebyrankCommand)
|
|
register("zremrangebyscore", zremrangebyscoreCommand)
|
|
register("zrevrange", zrevrangeCommand)
|
|
register("zrevrank", zrevrankCommand)
|
|
register("zrevrangebyscore", zrevrangebyscoreCommand)
|
|
register("zscore", zscoreCommand)
|
|
|
|
register("zunionstore", zunionstoreCommand)
|
|
register("zinterstore", zinterstoreCommand)
|
|
|
|
register("zrangebylex", zrangebylexCommand)
|
|
register("zremrangebylex", zremrangebylexCommand)
|
|
register("zlexcount", zlexcountCommand)
|
|
|
|
//ledisdb special command
|
|
|
|
register("zclear", zclearCommand)
|
|
register("zmclear", zmclearCommand)
|
|
register("zexpire", zexpireCommand)
|
|
register("zexpireat", zexpireAtCommand)
|
|
register("zttl", zttlCommand)
|
|
register("zpersist", zpersistCommand)
|
|
register("zxscan", zxscanCommand)
|
|
}
|