/
sortedset.go
655 lines (593 loc) · 17.8 KB
/
sortedset.go
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package database
import (
SortedSet "github.com/hdt3213/godis/datastruct/sortedset"
"github.com/hdt3213/godis/interface/database"
"github.com/hdt3213/godis/interface/redis"
"github.com/hdt3213/godis/lib/utils"
"github.com/hdt3213/godis/redis/protocol"
"strconv"
"strings"
)
func (db *DB) getAsSortedSet(key string) (*SortedSet.SortedSet, protocol.ErrorReply) {
entity, exists := db.GetEntity(key)
if !exists {
return nil, nil
}
sortedSet, ok := entity.Data.(*SortedSet.SortedSet)
if !ok {
return nil, &protocol.WrongTypeErrReply{}
}
return sortedSet, nil
}
func (db *DB) getOrInitSortedSet(key string) (sortedSet *SortedSet.SortedSet, inited bool, errReply protocol.ErrorReply) {
sortedSet, errReply = db.getAsSortedSet(key)
if errReply != nil {
return nil, false, errReply
}
inited = false
if sortedSet == nil {
sortedSet = SortedSet.Make()
db.PutEntity(key, &database.DataEntity{
Data: sortedSet,
})
inited = true
}
return sortedSet, inited, nil
}
// execZAdd adds member into sorted set
func execZAdd(db *DB, args [][]byte) redis.Reply {
if len(args)%2 != 1 {
return protocol.MakeSyntaxErrReply()
}
key := string(args[0])
size := (len(args) - 1) / 2
elements := make([]*SortedSet.Element, size)
for i := 0; i < size; i++ {
scoreValue := args[2*i+1]
member := string(args[2*i+2])
score, err := strconv.ParseFloat(string(scoreValue), 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not a valid float")
}
elements[i] = &SortedSet.Element{
Member: member,
Score: score,
}
}
// get or init entity
sortedSet, _, errReply := db.getOrInitSortedSet(key)
if errReply != nil {
return errReply
}
i := 0
for _, e := range elements {
if sortedSet.Add(e.Member, e.Score) {
i++
}
}
db.addAof(utils.ToCmdLine3("zadd", args...))
return protocol.MakeIntReply(int64(i))
}
func undoZAdd(db *DB, args [][]byte) []CmdLine {
key := string(args[0])
size := (len(args) - 1) / 2
fields := make([]string, size)
for i := 0; i < size; i++ {
fields[i] = string(args[2*i+2])
}
return rollbackZSetFields(db, key, fields...)
}
// execZScore gets score of a member in sortedset
func execZScore(db *DB, args [][]byte) redis.Reply {
// parse args
key := string(args[0])
member := string(args[1])
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return &protocol.NullBulkReply{}
}
element, exists := sortedSet.Get(member)
if !exists {
return &protocol.NullBulkReply{}
}
value := strconv.FormatFloat(element.Score, 'f', -1, 64)
return protocol.MakeBulkReply([]byte(value))
}
// execZRank gets index of a member in sortedset, ascending order, start from 0
func execZRank(db *DB, args [][]byte) redis.Reply {
// parse args
key := string(args[0])
member := string(args[1])
// get entity
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return &protocol.NullBulkReply{}
}
rank := sortedSet.GetRank(member, false)
if rank < 0 {
return &protocol.NullBulkReply{}
}
return protocol.MakeIntReply(rank)
}
// execZRevRank gets index of a member in sortedset, descending order, start from 0
func execZRevRank(db *DB, args [][]byte) redis.Reply {
// parse args
key := string(args[0])
member := string(args[1])
// get entity
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return &protocol.NullBulkReply{}
}
rank := sortedSet.GetRank(member, true)
if rank < 0 {
return &protocol.NullBulkReply{}
}
return protocol.MakeIntReply(rank)
}
// execZCard gets number of members in sortedset
func execZCard(db *DB, args [][]byte) redis.Reply {
// parse args
key := string(args[0])
// get entity
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return protocol.MakeIntReply(0)
}
return protocol.MakeIntReply(sortedSet.Len())
}
// execZRange gets members in range, sort by score in ascending order
func execZRange(db *DB, args [][]byte) redis.Reply {
// parse args
if len(args) != 3 && len(args) != 4 {
return protocol.MakeErrReply("ERR wrong number of arguments for 'zrange' command")
}
withScores := false
if len(args) == 4 {
if strings.ToUpper(string(args[3])) != "WITHSCORES" {
return protocol.MakeErrReply("syntax error")
}
withScores = true
}
key := string(args[0])
start, err := strconv.ParseInt(string(args[1]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
stop, err := strconv.ParseInt(string(args[2]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
return range0(db, key, start, stop, withScores, false)
}
// execZRevRange gets members in range, sort by score in descending order
func execZRevRange(db *DB, args [][]byte) redis.Reply {
// parse args
if len(args) != 3 && len(args) != 4 {
return protocol.MakeErrReply("ERR wrong number of arguments for 'zrevrange' command")
}
withScores := false
if len(args) == 4 {
if string(args[3]) != "WITHSCORES" {
return protocol.MakeErrReply("syntax error")
}
withScores = true
}
key := string(args[0])
start, err := strconv.ParseInt(string(args[1]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
stop, err := strconv.ParseInt(string(args[2]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
return range0(db, key, start, stop, withScores, true)
}
func range0(db *DB, key string, start int64, stop int64, withScores bool, desc bool) redis.Reply {
// get data
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return &protocol.EmptyMultiBulkReply{}
}
// compute index
size := sortedSet.Len() // assert: size > 0
if start < -1*size {
start = 0
} else if start < 0 {
start = size + start
} else if start >= size {
return &protocol.EmptyMultiBulkReply{}
}
if stop < -1*size {
stop = 0
} else if stop < 0 {
stop = size + stop + 1
} else if stop < size {
stop = stop + 1
} else {
stop = size
}
if stop < start {
stop = start
}
// assert: start in [0, size - 1], stop in [start, size]
slice := sortedSet.Range(start, stop, desc)
if withScores {
result := make([][]byte, len(slice)*2)
i := 0
for _, element := range slice {
result[i] = []byte(element.Member)
i++
scoreStr := strconv.FormatFloat(element.Score, 'f', -1, 64)
result[i] = []byte(scoreStr)
i++
}
return protocol.MakeMultiBulkReply(result)
}
result := make([][]byte, len(slice))
i := 0
for _, element := range slice {
result[i] = []byte(element.Member)
i++
}
return protocol.MakeMultiBulkReply(result)
}
// execZCount gets number of members which score within given range
func execZCount(db *DB, args [][]byte) redis.Reply {
key := string(args[0])
min, err := SortedSet.ParseScoreBorder(string(args[1]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
max, err := SortedSet.ParseScoreBorder(string(args[2]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
// get data
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return protocol.MakeIntReply(0)
}
return protocol.MakeIntReply(sortedSet.Count(min, max))
}
/*
* param limit: limit < 0 means no limit
*/
func rangeByScore0(db *DB, key string, min *SortedSet.ScoreBorder, max *SortedSet.ScoreBorder, offset int64, limit int64, withScores bool, desc bool) redis.Reply {
// get data
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return &protocol.EmptyMultiBulkReply{}
}
slice := sortedSet.RangeByScore(min, max, offset, limit, desc)
if withScores {
result := make([][]byte, len(slice)*2)
i := 0
for _, element := range slice {
result[i] = []byte(element.Member)
i++
scoreStr := strconv.FormatFloat(element.Score, 'f', -1, 64)
result[i] = []byte(scoreStr)
i++
}
return protocol.MakeMultiBulkReply(result)
}
result := make([][]byte, len(slice))
i := 0
for _, element := range slice {
result[i] = []byte(element.Member)
i++
}
return protocol.MakeMultiBulkReply(result)
}
// execZRangeByScore gets members which score within given range, in ascending order
func execZRangeByScore(db *DB, args [][]byte) redis.Reply {
if len(args) < 3 {
return protocol.MakeErrReply("ERR wrong number of arguments for 'zrangebyscore' command")
}
key := string(args[0])
min, err := SortedSet.ParseScoreBorder(string(args[1]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
max, err := SortedSet.ParseScoreBorder(string(args[2]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
withScores := false
var offset int64 = 0
var limit int64 = -1
if len(args) > 3 {
for i := 3; i < len(args); {
s := string(args[i])
if strings.ToUpper(s) == "WITHSCORES" {
withScores = true
i++
} else if strings.ToUpper(s) == "LIMIT" {
if len(args) < i+3 {
return protocol.MakeErrReply("ERR syntax error")
}
offset, err = strconv.ParseInt(string(args[i+1]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
limit, err = strconv.ParseInt(string(args[i+2]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
i += 3
} else {
return protocol.MakeErrReply("ERR syntax error")
}
}
}
return rangeByScore0(db, key, min, max, offset, limit, withScores, false)
}
// execZRevRangeByScore gets number of members which score within given range, in descending order
func execZRevRangeByScore(db *DB, args [][]byte) redis.Reply {
if len(args) < 3 {
return protocol.MakeErrReply("ERR wrong number of arguments for 'zrangebyscore' command")
}
key := string(args[0])
min, err := SortedSet.ParseScoreBorder(string(args[2]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
max, err := SortedSet.ParseScoreBorder(string(args[1]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
withScores := false
var offset int64 = 0
var limit int64 = -1
if len(args) > 3 {
for i := 3; i < len(args); {
s := string(args[i])
if strings.ToUpper(s) == "WITHSCORES" {
withScores = true
i++
} else if strings.ToUpper(s) == "LIMIT" {
if len(args) < i+3 {
return protocol.MakeErrReply("ERR syntax error")
}
offset, err = strconv.ParseInt(string(args[i+1]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
limit, err = strconv.ParseInt(string(args[i+2]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
i += 3
} else {
return protocol.MakeErrReply("ERR syntax error")
}
}
}
return rangeByScore0(db, key, min, max, offset, limit, withScores, true)
}
// execZRemRangeByScore removes members which score within given range
func execZRemRangeByScore(db *DB, args [][]byte) redis.Reply {
if len(args) != 3 {
return protocol.MakeErrReply("ERR wrong number of arguments for 'zremrangebyscore' command")
}
key := string(args[0])
min, err := SortedSet.ParseScoreBorder(string(args[1]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
max, err := SortedSet.ParseScoreBorder(string(args[2]))
if err != nil {
return protocol.MakeErrReply(err.Error())
}
// get data
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return &protocol.EmptyMultiBulkReply{}
}
removed := sortedSet.RemoveByScore(min, max)
if removed > 0 {
db.addAof(utils.ToCmdLine3("zremrangebyscore", args...))
}
return protocol.MakeIntReply(removed)
}
// execZRemRangeByRank removes members within given indexes
func execZRemRangeByRank(db *DB, args [][]byte) redis.Reply {
key := string(args[0])
start, err := strconv.ParseInt(string(args[1]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
stop, err := strconv.ParseInt(string(args[2]), 10, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
// get data
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return protocol.MakeIntReply(0)
}
// compute index
size := sortedSet.Len() // assert: size > 0
if start < -1*size {
start = 0
} else if start < 0 {
start = size + start
} else if start >= size {
return protocol.MakeIntReply(0)
}
if stop < -1*size {
stop = 0
} else if stop < 0 {
stop = size + stop + 1
} else if stop < size {
stop = stop + 1
} else {
stop = size
}
if stop < start {
stop = start
}
// assert: start in [0, size - 1], stop in [start, size]
removed := sortedSet.RemoveByRank(start, stop)
if removed > 0 {
db.addAof(utils.ToCmdLine3("zremrangebyrank", args...))
}
return protocol.MakeIntReply(removed)
}
func execZPopMin(db *DB, args [][]byte) redis.Reply {
key := string(args[0])
count := 1
if len(args) > 1 {
var err error
count, err = strconv.Atoi(string(args[1]))
if err != nil {
return protocol.MakeErrReply("ERR value is not an integer or out of range")
}
}
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return protocol.MakeEmptyMultiBulkReply()
}
removed := sortedSet.PopMin(count)
if len(removed) > 0 {
db.addAof(utils.ToCmdLine3("zpopmin", args...))
}
result := make([][]byte, 0, len(removed)*2)
for _, element := range removed {
scoreStr := strconv.FormatFloat(element.Score, 'f', -1, 64)
result = append(result, []byte(element.Member), []byte(scoreStr))
}
return protocol.MakeMultiBulkReply(result)
}
// execZRem removes given members
func execZRem(db *DB, args [][]byte) redis.Reply {
// parse args
key := string(args[0])
fields := make([]string, len(args)-1)
fieldArgs := args[1:]
for i, v := range fieldArgs {
fields[i] = string(v)
}
// get entity
sortedSet, errReply := db.getAsSortedSet(key)
if errReply != nil {
return errReply
}
if sortedSet == nil {
return protocol.MakeIntReply(0)
}
var deleted int64 = 0
for _, field := range fields {
if sortedSet.Remove(field) {
deleted++
}
}
if deleted > 0 {
db.addAof(utils.ToCmdLine3("zrem", args...))
}
return protocol.MakeIntReply(deleted)
}
func undoZRem(db *DB, args [][]byte) []CmdLine {
key := string(args[0])
fields := make([]string, len(args)-1)
fieldArgs := args[1:]
for i, v := range fieldArgs {
fields[i] = string(v)
}
return rollbackZSetFields(db, key, fields...)
}
// execZIncrBy increments the score of a member
func execZIncrBy(db *DB, args [][]byte) redis.Reply {
key := string(args[0])
rawDelta := string(args[1])
field := string(args[2])
delta, err := strconv.ParseFloat(rawDelta, 64)
if err != nil {
return protocol.MakeErrReply("ERR value is not a valid float")
}
// get or init entity
sortedSet, _, errReply := db.getOrInitSortedSet(key)
if errReply != nil {
return errReply
}
element, exists := sortedSet.Get(field)
if !exists {
sortedSet.Add(field, delta)
db.addAof(utils.ToCmdLine3("zincrby", args...))
return protocol.MakeBulkReply(args[1])
}
score := element.Score + delta
sortedSet.Add(field, score)
bytes := []byte(strconv.FormatFloat(score, 'f', -1, 64))
db.addAof(utils.ToCmdLine3("zincrby", args...))
return protocol.MakeBulkReply(bytes)
}
func undoZIncr(db *DB, args [][]byte) []CmdLine {
key := string(args[0])
field := string(args[2])
return rollbackZSetFields(db, key, field)
}
func init() {
registerCommand("ZAdd", execZAdd, writeFirstKey, undoZAdd, -4, flagWrite).
attachCommandExtra([]string{redisFlagWrite, redisFlagDenyOOM, redisFlagFast}, 1, 1, 1)
registerCommand("ZScore", execZScore, readFirstKey, nil, 3, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly, redisFlagFast}, 1, 1, 1)
registerCommand("ZIncrBy", execZIncrBy, writeFirstKey, undoZIncr, 4, flagWrite).
attachCommandExtra([]string{redisFlagWrite, redisFlagDenyOOM, redisFlagFast}, 1, 1, 1)
registerCommand("ZRank", execZRank, readFirstKey, nil, 3, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly, redisFlagFast}, 1, 1, 1)
registerCommand("ZCount", execZCount, readFirstKey, nil, 4, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly, redisFlagFast}, 1, 1, 1)
registerCommand("ZRevRank", execZRevRank, readFirstKey, nil, 3, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly, redisFlagFast}, 1, 1, 1)
registerCommand("ZCard", execZCard, readFirstKey, nil, 2, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly, redisFlagFast}, 1, 1, 1)
registerCommand("ZRange", execZRange, readFirstKey, nil, -4, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly}, 1, 1, 1)
registerCommand("ZRangeByScore", execZRangeByScore, readFirstKey, nil, -4, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly}, 1, 1, 1)
registerCommand("ZRevRange", execZRevRange, readFirstKey, nil, -4, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly}, 1, 1, 1)
registerCommand("ZRevRangeByScore", execZRevRangeByScore, readFirstKey, nil, -4, flagReadOnly).
attachCommandExtra([]string{redisFlagReadonly}, 1, 1, 1)
registerCommand("ZPopMin", execZPopMin, writeFirstKey, rollbackFirstKey, -2, flagWrite).
attachCommandExtra([]string{redisFlagWrite, redisFlagFast}, 1, 1, 1)
registerCommand("ZRem", execZRem, writeFirstKey, undoZRem, -3, flagWrite).
attachCommandExtra([]string{redisFlagWrite, redisFlagFast}, 1, 1, 1)
registerCommand("ZRemRangeByScore", execZRemRangeByScore, writeFirstKey, rollbackFirstKey, 4, flagWrite).
attachCommandExtra([]string{redisFlagWrite}, 1, 1, 1)
registerCommand("ZRemRangeByRank", execZRemRangeByRank, writeFirstKey, rollbackFirstKey, 4, flagWrite).
attachCommandExtra([]string{redisFlagWrite}, 1, 1, 1)
}