mirror of
https://github.com/HDT3213/godis.git
synced 2025-10-06 17:26:52 +08:00
417 lines
9.7 KiB
Go
417 lines
9.7 KiB
Go
package database
|
|
|
|
import (
|
|
Dict "github.com/hdt3213/godis/datastruct/dict"
|
|
"github.com/hdt3213/godis/interface/database"
|
|
"github.com/hdt3213/godis/interface/redis"
|
|
"github.com/hdt3213/godis/lib/utils"
|
|
"github.com/hdt3213/godis/redis/reply"
|
|
"github.com/shopspring/decimal"
|
|
"strconv"
|
|
)
|
|
|
|
func (db *DB) getAsDict(key string) (Dict.Dict, reply.ErrorReply) {
|
|
entity, exists := db.GetEntity(key)
|
|
if !exists {
|
|
return nil, nil
|
|
}
|
|
dict, ok := entity.Data.(Dict.Dict)
|
|
if !ok {
|
|
return nil, &reply.WrongTypeErrReply{}
|
|
}
|
|
return dict, nil
|
|
}
|
|
|
|
func (db *DB) getOrInitDict(key string) (dict Dict.Dict, inited bool, errReply reply.ErrorReply) {
|
|
dict, errReply = db.getAsDict(key)
|
|
if errReply != nil {
|
|
return nil, false, errReply
|
|
}
|
|
inited = false
|
|
if dict == nil {
|
|
dict = Dict.MakeSimple()
|
|
db.PutEntity(key, &database.DataEntity{
|
|
Data: dict,
|
|
})
|
|
inited = true
|
|
}
|
|
return dict, inited, nil
|
|
}
|
|
|
|
// execHSet sets field in hash table
|
|
func execHSet(db *DB, args [][]byte) redis.Reply {
|
|
// parse args
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
value := args[2]
|
|
|
|
// get or init entity
|
|
dict, _, errReply := db.getOrInitDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
|
|
result := dict.Put(field, value)
|
|
db.addAof(utils.ToCmdLine3("hset", args...))
|
|
return reply.MakeIntReply(int64(result))
|
|
}
|
|
|
|
func undoHSet(db *DB, args [][]byte) []CmdLine {
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
return rollbackHashFields(db, key, field)
|
|
}
|
|
|
|
// execHSetNX sets field in hash table only if field not exists
|
|
func execHSetNX(db *DB, args [][]byte) redis.Reply {
|
|
// parse args
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
value := args[2]
|
|
|
|
dict, _, errReply := db.getOrInitDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
|
|
result := dict.PutIfAbsent(field, value)
|
|
if result > 0 {
|
|
db.addAof(utils.ToCmdLine3("hsetnx", args...))
|
|
|
|
}
|
|
return reply.MakeIntReply(int64(result))
|
|
}
|
|
|
|
// execHGet gets field value of hash table
|
|
func execHGet(db *DB, args [][]byte) redis.Reply {
|
|
// parse args
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
|
|
// get entity
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return &reply.NullBulkReply{}
|
|
}
|
|
|
|
raw, exists := dict.Get(field)
|
|
if !exists {
|
|
return &reply.NullBulkReply{}
|
|
}
|
|
value, _ := raw.([]byte)
|
|
return reply.MakeBulkReply(value)
|
|
}
|
|
|
|
// execHExists checks if a hash field exists
|
|
func execHExists(db *DB, args [][]byte) redis.Reply {
|
|
// parse args
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
|
|
// get entity
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return reply.MakeIntReply(0)
|
|
}
|
|
|
|
_, exists := dict.Get(field)
|
|
if exists {
|
|
return reply.MakeIntReply(1)
|
|
}
|
|
return reply.MakeIntReply(0)
|
|
}
|
|
|
|
// execHDel deletes a hash field
|
|
func execHDel(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
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return reply.MakeIntReply(0)
|
|
}
|
|
|
|
deleted := 0
|
|
for _, field := range fields {
|
|
result := dict.Remove(field)
|
|
deleted += result
|
|
}
|
|
if dict.Len() == 0 {
|
|
db.Remove(key)
|
|
}
|
|
if deleted > 0 {
|
|
db.addAof(utils.ToCmdLine3("hdel", args...))
|
|
}
|
|
|
|
return reply.MakeIntReply(int64(deleted))
|
|
}
|
|
|
|
func undoHDel(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 rollbackHashFields(db, key, fields...)
|
|
}
|
|
|
|
// execHLen gets number of fields in hash table
|
|
func execHLen(db *DB, args [][]byte) redis.Reply {
|
|
// parse args
|
|
key := string(args[0])
|
|
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return reply.MakeIntReply(0)
|
|
}
|
|
return reply.MakeIntReply(int64(dict.Len()))
|
|
}
|
|
|
|
// execHMSet sets multi fields in hash table
|
|
func execHMSet(db *DB, args [][]byte) redis.Reply {
|
|
// parse args
|
|
if len(args)%2 != 1 {
|
|
return reply.MakeSyntaxErrReply()
|
|
}
|
|
key := string(args[0])
|
|
size := (len(args) - 1) / 2
|
|
fields := make([]string, size)
|
|
values := make([][]byte, size)
|
|
for i := 0; i < size; i++ {
|
|
fields[i] = string(args[2*i+1])
|
|
values[i] = args[2*i+2]
|
|
}
|
|
|
|
// get or init entity
|
|
dict, _, errReply := db.getOrInitDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
|
|
// put data
|
|
for i, field := range fields {
|
|
value := values[i]
|
|
dict.Put(field, value)
|
|
}
|
|
db.addAof(utils.ToCmdLine3("hmset", args...))
|
|
return &reply.OkReply{}
|
|
}
|
|
|
|
func undoHMSet(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+1])
|
|
}
|
|
return rollbackHashFields(db, key, fields...)
|
|
}
|
|
|
|
// execHMGet gets multi fields in hash table
|
|
func execHMGet(db *DB, args [][]byte) redis.Reply {
|
|
key := string(args[0])
|
|
size := len(args) - 1
|
|
fields := make([]string, size)
|
|
for i := 0; i < size; i++ {
|
|
fields[i] = string(args[i+1])
|
|
}
|
|
|
|
// get entity
|
|
result := make([][]byte, size)
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return reply.MakeMultiBulkReply(result)
|
|
}
|
|
|
|
for i, field := range fields {
|
|
value, ok := dict.Get(field)
|
|
if !ok {
|
|
result[i] = nil
|
|
} else {
|
|
bytes, _ := value.([]byte)
|
|
result[i] = bytes
|
|
}
|
|
}
|
|
return reply.MakeMultiBulkReply(result)
|
|
}
|
|
|
|
// execHKeys gets all field names in hash table
|
|
func execHKeys(db *DB, args [][]byte) redis.Reply {
|
|
key := string(args[0])
|
|
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return &reply.EmptyMultiBulkReply{}
|
|
}
|
|
|
|
fields := make([][]byte, dict.Len())
|
|
i := 0
|
|
dict.ForEach(func(key string, val interface{}) bool {
|
|
fields[i] = []byte(key)
|
|
i++
|
|
return true
|
|
})
|
|
return reply.MakeMultiBulkReply(fields[:i])
|
|
}
|
|
|
|
// execHVals gets all field value in hash table
|
|
func execHVals(db *DB, args [][]byte) redis.Reply {
|
|
key := string(args[0])
|
|
|
|
// get entity
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return &reply.EmptyMultiBulkReply{}
|
|
}
|
|
|
|
values := make([][]byte, dict.Len())
|
|
i := 0
|
|
dict.ForEach(func(key string, val interface{}) bool {
|
|
values[i], _ = val.([]byte)
|
|
i++
|
|
return true
|
|
})
|
|
return reply.MakeMultiBulkReply(values[:i])
|
|
}
|
|
|
|
// execHGetAll gets all key-value entries in hash table
|
|
func execHGetAll(db *DB, args [][]byte) redis.Reply {
|
|
key := string(args[0])
|
|
|
|
// get entity
|
|
dict, errReply := db.getAsDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
if dict == nil {
|
|
return &reply.EmptyMultiBulkReply{}
|
|
}
|
|
|
|
size := dict.Len()
|
|
result := make([][]byte, size*2)
|
|
i := 0
|
|
dict.ForEach(func(key string, val interface{}) bool {
|
|
result[i] = []byte(key)
|
|
i++
|
|
result[i], _ = val.([]byte)
|
|
i++
|
|
return true
|
|
})
|
|
return reply.MakeMultiBulkReply(result[:i])
|
|
}
|
|
|
|
// execHIncrBy increments the integer value of a hash field by the given number
|
|
func execHIncrBy(db *DB, args [][]byte) redis.Reply {
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
rawDelta := string(args[2])
|
|
delta, err := strconv.ParseInt(rawDelta, 10, 64)
|
|
if err != nil {
|
|
return reply.MakeErrReply("ERR value is not an integer or out of range")
|
|
}
|
|
|
|
dict, _, errReply := db.getOrInitDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
|
|
value, exists := dict.Get(field)
|
|
if !exists {
|
|
dict.Put(field, args[2])
|
|
db.addAof(utils.ToCmdLine3("hincrby", args...))
|
|
return reply.MakeBulkReply(args[2])
|
|
}
|
|
val, err := strconv.ParseInt(string(value.([]byte)), 10, 64)
|
|
if err != nil {
|
|
return reply.MakeErrReply("ERR hash value is not an integer")
|
|
}
|
|
val += delta
|
|
bytes := []byte(strconv.FormatInt(val, 10))
|
|
dict.Put(field, bytes)
|
|
db.addAof(utils.ToCmdLine3("hincrby", args...))
|
|
return reply.MakeBulkReply(bytes)
|
|
}
|
|
|
|
func undoHIncr(db *DB, args [][]byte) []CmdLine {
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
return rollbackHashFields(db, key, field)
|
|
}
|
|
|
|
// execHIncrByFloat increments the float value of a hash field by the given number
|
|
func execHIncrByFloat(db *DB, args [][]byte) redis.Reply {
|
|
key := string(args[0])
|
|
field := string(args[1])
|
|
rawDelta := string(args[2])
|
|
delta, err := decimal.NewFromString(rawDelta)
|
|
if err != nil {
|
|
return reply.MakeErrReply("ERR value is not a valid float")
|
|
}
|
|
|
|
// get or init entity
|
|
dict, _, errReply := db.getOrInitDict(key)
|
|
if errReply != nil {
|
|
return errReply
|
|
}
|
|
|
|
value, exists := dict.Get(field)
|
|
if !exists {
|
|
dict.Put(field, args[2])
|
|
return reply.MakeBulkReply(args[2])
|
|
}
|
|
val, err := decimal.NewFromString(string(value.([]byte)))
|
|
if err != nil {
|
|
return reply.MakeErrReply("ERR hash value is not a float")
|
|
}
|
|
result := val.Add(delta)
|
|
resultBytes := []byte(result.String())
|
|
dict.Put(field, resultBytes)
|
|
db.addAof(utils.ToCmdLine3("hincrbyfloat", args...))
|
|
return reply.MakeBulkReply(resultBytes)
|
|
}
|
|
|
|
func init() {
|
|
RegisterCommand("HSet", execHSet, writeFirstKey, undoHSet, 4)
|
|
RegisterCommand("HSetNX", execHSetNX, writeFirstKey, undoHSet, 4)
|
|
RegisterCommand("HGet", execHGet, readFirstKey, nil, 3)
|
|
RegisterCommand("HExists", execHExists, readFirstKey, nil, 3)
|
|
RegisterCommand("HDel", execHDel, writeFirstKey, undoHDel, -3)
|
|
RegisterCommand("HLen", execHLen, readFirstKey, nil, 2)
|
|
RegisterCommand("HMSet", execHMSet, writeFirstKey, undoHMSet, -4)
|
|
RegisterCommand("HMGet", execHMGet, readFirstKey, nil, -3)
|
|
RegisterCommand("HGet", execHGet, readFirstKey, nil, -3)
|
|
RegisterCommand("HKeys", execHKeys, readFirstKey, nil, 2)
|
|
RegisterCommand("HVals", execHVals, readFirstKey, nil, 2)
|
|
RegisterCommand("HGetAll", execHGetAll, readFirstKey, nil, 2)
|
|
RegisterCommand("HIncrBy", execHIncrBy, writeFirstKey, undoHIncr, 4)
|
|
RegisterCommand("HIncrByFloat", execHIncrByFloat, writeFirstKey, undoHIncr, 4)
|
|
}
|