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commands.go
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commands.go
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package main
import (
"errors"
"io"
"strconv"
as "github.com/aerospike/aerospike-client-go"
ase "github.com/aerospike/aerospike-client-go/types"
)
func cmdDEL(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
existed, err := ctx.client.Delete(ctx.writePolicy, key)
if err != nil {
return err
}
if existed {
return writeLine(wf, ":1")
}
return writeLine(wf, ":0")
}
func get(wf io.Writer, ctx *context, k []byte, binName string) error {
key, err := buildKey(ctx, k)
if err != nil {
return err
}
rec, err := ctx.client.Get(ctx.readPolicy, key, binName)
if err != nil {
return err
}
return writeBin(wf, rec, binName, "$-1")
}
func cmdGET(wf io.Writer, ctx *context, args [][]byte) error {
return get(wf, ctx, args[0], binName)
}
func cmdMGET(wf io.Writer, ctx *context, args [][]byte) error {
res := make([]*as.Record, len(args))
for i := 0; i < len(args); i++ {
key, err := buildKey(ctx, args[i])
if err != nil {
return err
}
rec, err := ctx.client.Get(ctx.readPolicy, key, binName)
if err != nil {
return err
}
res[i] = rec
}
return writeArrayBin(wf, res, binName, "")
}
func cmdHGET(wf io.Writer, ctx *context, args [][]byte) error {
return get(wf, ctx, args[0], string(args[1]))
}
func setex(wf io.Writer, ctx *context, k []byte, binName string, content []byte, ttl int, createOnly bool) error {
key, err := buildKey(ctx, k)
if err != nil {
return err
}
err = ctx.client.PutBins(createWritePolicyEx(ttl, createOnly), key, as.NewBin(binName, encode(ctx, content)))
if err != nil {
if createOnly && errResultCode(err) == ase.KEY_EXISTS_ERROR {
return writeLine(wf, ":0")
}
return err
}
if createOnly {
return writeLine(wf, ":1")
}
return writeLine(wf, "+OK")
}
func cmdSET(wf io.Writer, ctx *context, args [][]byte) error {
return setex(wf, ctx, args[0], binName, args[1], -2, false)
}
func cmdSETEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
return setex(wf, ctx, args[0], binName, args[2], ttl, false)
}
func cmdMSET(wf io.Writer, ctx *context, args [][]byte) error {
for i := 0; i+1 < len(args); i += 2 {
key, err := buildKey(ctx, args[i])
if err != nil {
return err
}
err = ctx.client.PutBins(ctx.writePolicy, key, as.NewBin(binName, encode(ctx, args[i+1])))
if err != nil {
return err
}
}
return writeLine(wf, "+OK")
}
func cmdSETNX(wf io.Writer, ctx *context, args [][]byte) error {
return setex(wf, ctx, args[0], binName, args[1], -1, true)
}
func cmdSETNXEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
return setex(wf, ctx, args[0], binName, args[2], ttl, true)
}
func tryHSet(ctx *context, key *as.Key, field string, value interface{}, ttl int) (bool, error) {
policy := as.NewPolicy()
policy.ReplicaPolicy = as.MASTER
rec, err := ctx.client.Get(policy, key, field)
if err != nil {
return false, err
}
var generation uint32
if rec != nil {
generation = rec.Generation
} else {
generation = 0
}
err = ctx.client.PutBins(createWritePolicyGeneration(generation, ttl), key, as.NewBin(field, value))
if err != nil {
return false, err
}
if rec == nil {
return false, nil
}
if rec.Bins[field] == nil {
return false, nil
}
return true, nil
}
func hset(wf io.Writer, ctx *context, k []byte, kk []byte, v interface{}, ttl int, set bool) error {
key, err := buildKey(ctx, k)
if err != nil {
return err
}
field := string(kk)
for i := 0; i < ctx.generationRetries; i++ {
existed, err := tryHSet(ctx, key, field, v, ttl)
if err == nil {
if !set {
existed = !existed
}
if existed {
return writeLine(wf, ":0")
}
return writeLine(wf, ":1")
}
if errResultCode(err) != ase.GENERATION_ERROR {
return err
}
}
return errors.New("Too many retry for hset")
}
func cmdHSET(wf io.Writer, ctx *context, args [][]byte) error {
return hset(wf, ctx, args[0], args[1], args[2], -1, true)
}
func cmdHSETEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
return hset(wf, ctx, args[0], args[2], args[3], ttl, true)
}
func cmdHDEL(wf io.Writer, ctx *context, args [][]byte) error {
return hset(wf, ctx, args[0], args[1], nil, -1, false)
}
func listOpReturnSize(wf io.Writer, ctx *context, args [][]byte, ttl int, op *as.Operation) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
rec, err := ctx.client.Operate(createWritePolicyEx(ttl, false), key, op, as.AddOp(as.NewBin(sizeArrayField, 1)))
if err != nil {
return err
}
return writeBinInt(wf, rec, binName)
}
func arrayRPush(wf io.Writer, ctx *context, args [][]byte, ttl int) error {
// ListInsertOp does not like to be called on an empty list and -1
// ListAppendOp is ok
return listOpReturnSize(wf, ctx, args, ttl, as.ListAppendOp(binName, encode(ctx, args[1])))
}
func cmdRPUSH(wf io.Writer, ctx *context, args [][]byte) error {
return arrayRPush(wf, ctx, args, -1)
}
func cmdRPUSHEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
return arrayRPush(wf, ctx, args, ttl)
}
func arrayLPush(wf io.Writer, ctx *context, args [][]byte, ttl int) error {
return listOpReturnSize(wf, ctx, args, ttl, as.ListInsertOp(binName, 0, encode(ctx, args[1])))
}
func cmdLPUSH(wf io.Writer, ctx *context, args [][]byte) error {
return arrayLPush(wf, ctx, args, -1)
}
func cmdLPUSHEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
return arrayLPush(wf, ctx, args, ttl)
}
func arrayPop(wf io.Writer, ctx *context, args [][]byte, index int) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
size, err := ctx.client.Get(ctx.readPolicy, key, sizeArrayField)
if err != nil {
return err
}
if size == nil {
return writeLine(wf, "$-1")
}
if size.Bins[sizeArrayField] == nil {
return writeLine(wf, "$-1")
}
if size.Bins[sizeArrayField].(int) == 0 {
return writeLine(wf, "$-1")
}
rec, err := ctx.client.Operate(ctx.writePolicy, key, as.ListPopOp(binName, index), as.AddOp(as.NewBin(sizeArrayField, -1)))
code := errResultCode(err)
if code == ase.BIN_TYPE_ERROR || code == ase.PARAMETER_ERROR {
return writeLine(wf, "$-1")
}
if err != nil {
return err
}
result := rec.Bins[binName]
switch result.(type) {
case int:
return writeByteArray(wf, []byte(strconv.Itoa(result.(int))))
default:
return writeByteArray(wf, result.([]byte))
}
}
func cmdRPOP(wf io.Writer, ctx *context, args [][]byte) error {
return arrayPop(wf, ctx, args, -1)
}
func cmdLPOP(wf io.Writer, ctx *context, args [][]byte) error {
return arrayPop(wf, ctx, args, 0)
}
func cmdLLEN(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
rec, err := ctx.client.Get(ctx.readPolicy, key, sizeArrayField)
if err != nil {
return err
}
return writeBinIntFull(wf, rec, sizeArrayField, ":0", "$-1")
}
func cmdLRANGE(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
start, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
stop, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
result, _, _, err := arrayRange(ctx, key, start, stop)
if err != nil {
return err
}
return writeArray(wf, result)
}
func arrayRange(ctx *context, key *as.Key, start int, stop int) ([]interface{}, uint32, bool, error) {
if ((stop > 0 && start > 0) || (stop < 0 && start < 0)) && start > stop {
return make([]interface{}, 0), 0, false, nil
}
count := stop - start + 1
if stop < start {
count -= 1
}
rec, err := ctx.client.Operate(ctx.writePolicy, key, as.ListGetRangeOp(binName, start, count), as.ListSizeOp(binName))
if errResultCode(err) == ase.PARAMETER_ERROR {
return make([]interface{}, 0), 0, false, nil
}
if err != nil {
return nil, 0, false, err
}
if rec == nil {
return make([]interface{}, 0), 0, true, nil
}
a := rec.Bins[binName].([]interface{})
size, result := a[len(a)-1], a[:len(a)-1]
if start < 0 && stop >= 0 {
end := size.(int) + start + 1
if end < len(result) {
result = result[0:end]
}
}
if start >= 0 && stop < 0 {
end := size.(int) + stop + 1
if end < len(result) {
result = result[0:end]
}
}
return result, rec.Generation, false, nil
}
func cmdLTRIM(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
start, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
stop, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
for i := 0; i < ctx.generationRetries; i++ {
err := tryLTRIM(wf, ctx, key, start, stop)
if err == nil {
return writeLine(wf, "+OK")
}
if errResultCode(err) != ase.GENERATION_ERROR {
return err
}
}
return errors.New("Too many retry for ltrim")
}
func tryLTRIM(wf io.Writer, ctx *context, key *as.Key, start int, stop int) error {
result, generation, nonExistent, err := arrayRange(ctx, key, start, stop)
if err != nil {
return err
}
ops := make([]*as.Operation, 1)
ops[0] = as.ListClearOp(binName)
if len(result) > 0 {
ops = append(ops, as.ListAppendOp(binName, result...))
}
ops = append(ops, as.PutOp(as.NewBin(sizeArrayField, len(result))))
policy := ctx.writePolicy
if nonExistent {
return nil
}
if generation > 0 {
policy = createWritePolicyGeneration(generation, -1)
}
_, err = ctx.client.Operate(policy, key, ops...)
if err != nil {
return err
}
return nil
}
func hIncrByEx(wf io.Writer, ctx *context, k []byte, field string, incr int, ttl int) error {
key, err := buildKey(ctx, k)
if err != nil {
return err
}
bin := as.NewBin(field, incr)
rec, err := ctx.client.Operate(createWritePolicyEx(ttl, false), key, as.AddOp(bin), as.GetOpForBin(field))
if err != nil {
if errResultCode(err) == ase.BIN_TYPE_ERROR {
return writeLine(wf, "$-1")
}
return err
}
return writeBinInt(wf, rec, field)
}
func cmdINCR(wf io.Writer, ctx *context, args [][]byte) error {
return hIncrByEx(wf, ctx, args[0], binName, 1, -1)
}
func cmdDECR(wf io.Writer, ctx *context, args [][]byte) error {
return hIncrByEx(wf, ctx, args[0], binName, -1, -1)
}
func cmdINCRBY(wf io.Writer, ctx *context, args [][]byte) error {
incr, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
return hIncrByEx(wf, ctx, args[0], binName, incr, -1)
}
func cmdINCRBYEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
incr, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
return hIncrByEx(wf, ctx, args[0], binName, incr, ttl)
}
func cmdHINCRBY(wf io.Writer, ctx *context, args [][]byte) error {
incr, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
return hIncrByEx(wf, ctx, args[0], string(args[1]), incr, -1)
}
func cmdHINCRBYEX(wf io.Writer, ctx *context, args [][]byte) error {
incr, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
ttl, err := strconv.Atoi(string(args[3]))
if err != nil {
return err
}
return hIncrByEx(wf, ctx, args[0], string(args[1]), incr, ttl)
}
func cmdDECRBY(wf io.Writer, ctx *context, args [][]byte) error {
decr, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
return hIncrByEx(wf, ctx, args[0], binName, -decr, -1)
}
func cmdDECRBYEX(wf io.Writer, ctx *context, args [][]byte) error {
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
decr, err := strconv.Atoi(string(args[2]))
if err != nil {
return err
}
return hIncrByEx(wf, ctx, args[0], binName, -decr, ttl)
}
func cmdHMGET(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
a := make([]string, len(args)-1)
for i, e := range args[1:] {
a[i] = string(e)
}
rec, err := ctx.client.Get(ctx.readPolicy, key, a...)
if err != nil {
return err
}
err = writeLine(wf, "*"+strconv.Itoa(len(a)))
if err != nil {
return err
}
for _, e := range a {
err = writeBin(wf, rec, e, "$-1")
if err != nil {
return err
}
}
return nil
}
func cmdHMSET(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
bins := make([]*as.Bin, (len(args)-1)/2)
for i := 1; i+1 < len(args); i += 2 {
bins[i/2] = as.NewBin(string(args[i]), encode(ctx, args[i+1]))
}
err = ctx.client.PutBins(ctx.writePolicy, key, bins...)
if err != nil {
return err
}
return writeLine(wf, "+OK")
}
func cmdHGETALL(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
rec, err := ctx.client.Get(ctx.readPolicy, key)
if err != nil {
return err
}
if rec == nil {
err = writeLine(wf, "*0")
if err != nil {
return err
}
} else {
err = writeLine(wf, "*"+strconv.Itoa(len(rec.Bins)*2))
if err != nil {
return err
}
for k, v := range rec.Bins {
err = writeByteArray(wf, []byte(k))
if err != nil {
return err
}
err = writeValue(wf, v)
if err != nil {
return err
}
}
}
return nil
}
func cmdEXPIRE(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
err = ctx.client.Touch(createWritePolicyEx(ttl, false), key)
if err != nil {
if errResultCode(err) == ase.KEY_NOT_FOUND_ERROR {
return writeLine(wf, ":0")
}
return err
}
return writeLine(wf, ":1")
}
func cmdTTL(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
rec, err := ctx.client.GetHeader(ctx.readPolicy, key)
if err != nil {
return err
}
if rec == nil {
return writeLine(wf, ":-2")
}
ttl := uint64(rec.Expiration)
if ttl >= 4294967295 {
return writeLine(wf, ":-1")
}
return writeLine(wf, ":"+strconv.FormatUint(ttl, 10))
}
func cmdEXISTS(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
rec, err := ctx.client.GetHeader(ctx.readPolicy, key)
if err != nil {
return err
}
if rec == nil {
return writeLine(wf, ":0")
}
return writeLine(wf, ":1")
}
func cmdFLUSHDB(wf io.Writer, ctx *context, args [][]byte) error {
policy := as.NewScanPolicy()
recordset, err := ctx.client.ScanAll(policy, ctx.ns, ctx.set)
if err != nil {
return err
}
for res := range recordset.Results() {
if res.Err != nil {
return err
}
_, err := ctx.client.Delete(ctx.writePolicy, res.Record.Key)
if err != nil {
return err
}
}
return writeLine(wf, "+OK")
}
func cmdHMINCRBYEX(wf io.Writer, ctx *context, args [][]byte) error {
key, err := buildKey(ctx, args[0])
if err != nil {
return err
}
ttl, err := strconv.Atoi(string(args[1]))
if err != nil {
return err
}
if len(args) == 2 {
err := ctx.client.Touch(createWritePolicyEx(ttl, false), key)
if err != nil {
if errResultCode(err) != ase.KEY_NOT_FOUND_ERROR {
return err
}
}
return writeLine(wf, "+OK")
}
ops := make([]*as.Operation, (len(args)-2)/2)
for i := 2; i+1 < len(args); i += 2 {
incr, err := strconv.Atoi(string(args[i+1]))
if err != nil {
return err
}
ops[(i/2)-1] = as.AddOp(as.NewBin(string(args[i]), incr))
}
_, err = ctx.client.Operate(createWritePolicyEx(ttl, false), key, ops...)
if err != nil {
return err
}
return writeLine(wf, "+OK")
}