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add xhscan, xsscan, xzscan

This commit is contained in:
siddontang 2015-03-02 14:30:04 +08:00
parent f34d3ac27b
commit 8de966c081
5 changed files with 441 additions and 104 deletions
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141
ledis/scan.go
View File

@ -48,11 +48,9 @@ func getDataStoreType(dataType DataType) (byte, error) {
return storeDataType, nil
}
func (db *DB) scanGeneric(storeDataType byte, key []byte, count int,
inclusive bool, match string, reverse bool) ([][]byte, error) {
var minKey, maxKey []byte
func buildMatchRegexp(match string) (*regexp.Regexp, error) {
var err error
var r *regexp.Regexp
var r *regexp.Regexp = nil
if len(match) > 0 {
if r, err = regexp.Compile(match); err != nil {
@ -60,6 +58,17 @@ func (db *DB) scanGeneric(storeDataType byte, key []byte, count int,
}
}
return r, nil
}
func (db *DB) scanGeneric(storeDataType byte, key []byte, count int,
inclusive bool, match string, reverse bool) ([][]byte, error) {
var minKey, maxKey []byte
r, err := buildMatchRegexp(match)
if err != nil {
return nil, err
}
tp := store.RangeOpen
if !reverse {
@ -151,10 +160,10 @@ func (db *DB) encodeScanKey(storeDataType byte, key []byte) ([]byte, error) {
return db.hEncodeSizeKey(key), nil
case ZSizeType:
return db.zEncodeSizeKey(key), nil
case BitMetaType:
return db.bEncodeMetaKey(key), nil
case SSizeType:
return db.sEncodeSizeKey(key), nil
case BitMetaType:
return db.bEncodeMetaKey(key), nil
default:
return nil, errDataType
}
@ -165,3 +174,123 @@ func (db *DB) decodeScanKey(storeDataType byte, ek []byte) ([]byte, error) {
}
return ek[2:], nil
}
// for specail data scan
func (db *DB) buildDataScanIterator(start []byte, stop []byte, inclusive bool) *store.RangeLimitIterator {
tp := store.RangeROpen
if !inclusive {
tp = store.RangeOpen
}
it := db.bucket.RangeIterator(start, stop, tp)
return it
}
func (db *DB) HScan(key []byte, cursor []byte, count int, inclusive bool, match string) ([]FVPair, error) {
if err := checkKeySize(key); err != nil {
return nil, err
}
start := db.hEncodeHashKey(key, cursor)
stop := db.hEncodeStopKey(key)
v := make([]FVPair, 0, 16)
r, err := buildMatchRegexp(match)
if err != nil {
return nil, err
}
it := db.buildDataScanIterator(start, stop, inclusive)
defer it.Close()
for i := 0; it.Valid() && i < count; it.Next() {
_, f, err := db.hDecodeHashKey(it.Key())
if err != nil {
return nil, err
} else if r != nil && !r.Match(f) {
continue
}
v = append(v, FVPair{Field: f, Value: it.Value()})
i++
}
return v, nil
}
func (db *DB) SScan(key []byte, cursor []byte, count int, inclusive bool, match string) ([][]byte, error) {
if err := checkKeySize(key); err != nil {
return nil, err
}
start := db.sEncodeSetKey(key, cursor)
stop := db.sEncodeStopKey(key)
v := make([][]byte, 0, 16)
r, err := buildMatchRegexp(match)
if err != nil {
return nil, err
}
it := db.buildDataScanIterator(start, stop, inclusive)
defer it.Close()
for i := 0; it.Valid() && i < count; it.Next() {
_, m, err := db.sDecodeSetKey(it.Key())
if err != nil {
return nil, err
} else if r != nil && !r.Match(m) {
continue
}
v = append(v, m)
i++
}
return v, nil
}
func (db *DB) ZScan(key []byte, cursor []byte, count int, inclusive bool, match string) ([]ScorePair, error) {
if err := checkKeySize(key); err != nil {
return nil, err
}
start := db.zEncodeSetKey(key, cursor)
stop := db.zEncodeStopSetKey(key)
v := make([]ScorePair, 0, 16)
r, err := buildMatchRegexp(match)
if err != nil {
return nil, err
}
it := db.buildDataScanIterator(start, stop, inclusive)
defer it.Close()
for i := 0; it.Valid() && i < count; it.Next() {
_, m, err := db.zDecodeSetKey(it.Key())
if err != nil {
return nil, err
} else if r != nil && !r.Match(m) {
continue
}
score, err := Int64(it.Value(), nil)
if err != nil {
return nil, err
}
v = append(v, ScorePair{Score: score, Member: m})
i++
}
return v, nil
}

84
ledis/scan_test.go
View File

@ -111,7 +111,7 @@ func TestDBScan(t *testing.T) {
}
func TestDBHScan(t *testing.T) {
func TestDBHKeyScan(t *testing.T) {
db := getTestDB()
db.hFlush()
@ -155,7 +155,7 @@ func TestDBHScan(t *testing.T) {
}
func TestDBZScan(t *testing.T) {
func TestDBZKeyScan(t *testing.T) {
db := getTestDB()
db.zFlush()
@ -199,7 +199,7 @@ func TestDBZScan(t *testing.T) {
}
func TestDBLScan(t *testing.T) {
func TestDBLKeyScan(t *testing.T) {
db := getTestDB()
db.lFlush()
@ -249,10 +249,10 @@ func TestDBLScan(t *testing.T) {
}
func TestDBSScan(t *testing.T) {
func TestDBSKeyScan(t *testing.T) {
db := getTestDB()
db.bFlush()
db.sFlush()
k1 := []byte("k1")
if _, err := db.SAdd(k1, []byte("1")); err != nil {
@ -296,5 +296,77 @@ func TestDBSScan(t *testing.T) {
} else if string(v[1]) != "k3" {
t.Fatal("invalid value ", string(v[1]))
}
}
func TestDBHScan(t *testing.T) {
db := getTestDB()
key := []byte("scan_h_key")
value := []byte("hello world")
db.HSet(key, []byte("1"), value)
db.HSet(key, []byte("222"), value)
db.HSet(key, []byte("19"), value)
db.HSet(key, []byte("1234"), value)
v, err := db.HScan(key, nil, 100, true, "")
if err != nil {
t.Fatal(err)
} else if len(v) != 4 {
t.Fatal("invalid count", len(v))
}
v, err = db.HScan(key, []byte("19"), 1, false, "")
if err != nil {
t.Fatal(err)
} else if len(v) != 1 {
t.Fatal("invalid count", len(v))
} else if string(v[0].Field) != "222" {
t.Fatal(string(v[0].Field))
}
}
func TestDBSScan(t *testing.T) {
db := getTestDB()
key := []byte("scan_s_key")
db.SAdd(key, []byte("1"), []byte("222"), []byte("19"), []byte("1234"))
v, err := db.SScan(key, nil, 100, true, "")
if err != nil {
t.Fatal(err)
} else if len(v) != 4 {
t.Fatal("invalid count", len(v))
}
v, err = db.SScan(key, []byte("19"), 1, false, "")
if err != nil {
t.Fatal(err)
} else if len(v) != 1 {
t.Fatal("invalid count", len(v))
} else if string(v[0]) != "222" {
t.Fatal(string(v[0]))
}
}
func TestDBZScan(t *testing.T) {
db := getTestDB()
key := []byte("scan_z_key")
db.ZAdd(key, ScorePair{1, []byte("1")}, ScorePair{2, []byte("222")}, ScorePair{3, []byte("19")}, ScorePair{4, []byte("1234")})
v, err := db.ZScan(key, nil, 100, true, "")
if err != nil {
t.Fatal(err)
} else if len(v) != 4 {
t.Fatal("invalid count", len(v))
}
v, err = db.ZScan(key, []byte("19"), 1, false, "")
if err != nil {
t.Fatal(err)
} else if len(v) != 1 {
t.Fatal("invalid count", len(v))
} else if string(v[0].Member) != "222" {
t.Fatal(string(v[0].Member))
}
}

12
ledis/t_hash.go
View File

@ -354,6 +354,8 @@ func (db *DB) HGetAll(key []byte) ([]FVPair, error) {
v := make([]FVPair, 0, 16)
it := db.bucket.RangeLimitIterator(start, stop, store.RangeROpen, 0, -1)
defer it.Close()
for ; it.Valid(); it.Next() {
_, f, err := db.hDecodeHashKey(it.Key())
if err != nil {
@ -363,8 +365,6 @@ func (db *DB) HGetAll(key []byte) ([]FVPair, error) {
v = append(v, FVPair{Field: f, Value: it.Value()})
}
it.Close()
return v, nil
}
@ -379,6 +379,8 @@ func (db *DB) HKeys(key []byte) ([][]byte, error) {
v := make([][]byte, 0, 16)
it := db.bucket.RangeLimitIterator(start, stop, store.RangeROpen, 0, -1)
defer it.Close()
for ; it.Valid(); it.Next() {
_, f, err := db.hDecodeHashKey(it.Key())
if err != nil {
@ -387,8 +389,6 @@ func (db *DB) HKeys(key []byte) ([][]byte, error) {
v = append(v, f)
}
it.Close()
return v, nil
}
@ -403,6 +403,8 @@ func (db *DB) HValues(key []byte) ([][]byte, error) {
v := make([][]byte, 0, 16)
it := db.bucket.RangeLimitIterator(start, stop, store.RangeROpen, 0, -1)
defer it.Close()
for ; it.Valid(); it.Next() {
_, _, err := db.hDecodeHashKey(it.Key())
if err != nil {
@ -412,8 +414,6 @@ func (db *DB) HValues(key []byte) ([][]byte, error) {
v = append(v, it.Value())
}
it.Close()
return v, nil
}

204
server/cmd_scan.go
View File

@ -3,12 +3,51 @@ package server
import (
"fmt"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/num"
"github.com/siddontang/ledisdb/ledis"
"strconv"
"strings"
)
// XSCAN type cursor [MATCH match] [COUNT count] [ASC|DESC]
func parseScanArgs(args [][]byte) (cursor []byte, match string, count int, err error) {
cursor = args[0]
args = args[1:]
count = 10
for i := 0; i < len(args); {
switch strings.ToUpper(hack.String(args[i])) {
case "MATCH":
if i+1 >= len(args) {
err = ErrCmdParams
return
}
match = hack.String(args[i+1])
i = i + 2
case "COUNT":
if i+1 >= len(args) {
err = ErrCmdParams
return
}
count, err = strconv.Atoi(hack.String(args[i+1]))
if err != nil {
return
}
i = i + 2
default:
err = fmt.Errorf("invalid argument %s", args[i])
return
}
}
return
}
// XSCAN type cursor [MATCH match] [COUNT count]
func xscanCommand(c *client) error {
args := c.args
@ -32,55 +71,13 @@ func xscanCommand(c *client) error {
return fmt.Errorf("invalid key type %s", args[0])
}
cursor := args[1]
cursor, match, count, err := parseScanArgs(args[1:])
args = args[2:]
match := ""
count := 10
desc := false
var err error
for i := 0; i < len(args); {
switch strings.ToUpper(hack.String(args[i])) {
case "MATCH":
if i+1 >= len(args) {
return ErrCmdParams
}
match = hack.String(args[i+1])
i = i + 2
case "COUNT":
if i+1 >= len(args) {
return ErrCmdParams
}
count, err = strconv.Atoi(hack.String(args[i+1]))
if err != nil {
return err
}
i = i + 2
case "ASC":
desc = false
i++
case "DESC":
desc = true
i++
default:
return fmt.Errorf("invalid argument %s", args[i])
}
}
var ay [][]byte
if !desc {
ay, err = c.db.Scan(dataType, cursor, count, false, match)
} else {
ay, err = c.db.RevScan(dataType, cursor, count, false, match)
}
ay, err := c.db.Scan(dataType, cursor, count, false, match)
if err != nil {
return err
}
@ -96,6 +93,123 @@ func xscanCommand(c *client) error {
return nil
}
// XHSCAN key cursor [MATCH match] [COUNT count]
func xhscanCommand(c *client) error {
args := c.args
if len(args) < 2 {
return ErrCmdParams
}
key := args[0]
cursor, match, count, err := parseScanArgs(args[1:])
if err != nil {
return err
}
ay, err := c.db.HScan(key, cursor, count, false, match)
if err != nil {
return err
}
data := make([]interface{}, 2)
if len(ay) < count {
data[0] = []byte("")
} else {
data[0] = ay[len(ay)-1].Field
}
vv := make([][]byte, 0, len(ay)*2)
for _, v := range ay {
vv = append(vv, v.Field, v.Value)
}
data[1] = vv
c.resp.writeArray(data)
return nil
}
// XSSCAN key cursor [MATCH match] [COUNT count]
func xsscanCommand(c *client) error {
args := c.args
if len(args) < 2 {
return ErrCmdParams
}
key := args[0]
cursor, match, count, err := parseScanArgs(args[1:])
if err != nil {
return err
}
ay, err := c.db.SScan(key, cursor, count, false, match)
if err != nil {
return err
}
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
}
// XZSCAN key cursor [MATCH match] [COUNT count]
func xzscanCommand(c *client) error {
args := c.args
if len(args) < 2 {
return ErrCmdParams
}
key := args[0]
cursor, match, count, err := parseScanArgs(args[1:])
if err != nil {
return err
}
ay, err := c.db.ZScan(key, cursor, count, false, match)
if err != nil {
return err
}
data := make([]interface{}, 2)
if len(ay) < count {
data[0] = []byte("")
} else {
data[0] = ay[len(ay)-1].Member
}
vv := make([][]byte, 0, len(ay)*2)
for _, v := range ay {
vv = append(vv, v.Member, num.FormatInt64ToSlice(v.Score))
}
data[1] = vv
c.resp.writeArray(data)
return nil
}
func init() {
register("xscan", xscanCommand)
register("xhscan", xhscanCommand)
register("xsscan", xsscanCommand)
register("xzscan", xzscanCommand)
}

100
server/cmd_scan_test.go
View File

@ -29,14 +29,14 @@ func TestScan(t *testing.T) {
defer c.Close()
testKVScan(t, c)
testHashScan(t, c)
testListScan(t, c)
testZSetScan(t, c)
testSetScan(t, c)
testHashKeyScan(t, c)
testListKeyScan(t, c)
testZSetKeyScan(t, c)
testSetKeyScan(t, c)
}
func checkScanValues(t *testing.T, ay interface{}, values ...int) {
func checkScanValues(t *testing.T, ay interface{}, values ...interface{}) {
a, err := ledis.Strings(ay, nil)
if err != nil {
t.Fatal(err)
@ -47,8 +47,8 @@ func checkScanValues(t *testing.T, ay interface{}, values ...int) {
}
for i, v := range a {
if string(v) != fmt.Sprintf("%d", values[i]) {
t.Fatal(fmt.Sprintf("%d %s != %d", string(v), values[i]))
if string(v) != fmt.Sprintf("%v", values[i]) {
t.Fatal(fmt.Sprintf("%d %s != %v", string(v), values[i]))
}
}
}
@ -76,29 +76,6 @@ func checkScan(t *testing.T, c *ledis.Client, tp string) {
}
func checkRevScan(t *testing.T, c *ledis.Client, tp string) {
if ay, err := ledis.Values(c.Do("XSCAN", tp, "", "count", 5, "DESC")); err != nil {
t.Fatal(err)
} else if len(ay) != 2 {
t.Fatal(len(ay))
} else if n := ay[0].([]byte); string(n) != "5" {
t.Fatal(string(n))
} else {
checkScanValues(t, ay[1], 9, 8, 7, 6, 5)
}
if ay, err := ledis.Values(c.Do("XSCAN", tp, "5", "count", 6, "DESC")); err != nil {
t.Fatal(err)
} else if len(ay) != 2 {
t.Fatal(len(ay))
} else if n := ay[0].([]byte); string(n) != "" {
t.Fatal(string(n))
} else {
checkScanValues(t, ay[1], 4, 3, 2, 1, 0)
}
}
func testKVScan(t *testing.T, c *ledis.Client) {
for i := 0; i < 10; i++ {
if _, err := c.Do("set", fmt.Sprintf("%d", i), []byte("value")); err != nil {
@ -107,10 +84,9 @@ func testKVScan(t *testing.T, c *ledis.Client) {
}
checkScan(t, c, "KV")
checkRevScan(t, c, "KV")
}
func testHashScan(t *testing.T, c *ledis.Client) {
func testHashKeyScan(t *testing.T, c *ledis.Client) {
for i := 0; i < 10; i++ {
if _, err := c.Do("hset", fmt.Sprintf("%d", i), fmt.Sprintf("%d", i), []byte("value")); err != nil {
t.Fatal(err)
@ -118,10 +94,9 @@ func testHashScan(t *testing.T, c *ledis.Client) {
}
checkScan(t, c, "HASH")
checkRevScan(t, c, "HASH")
}
func testListScan(t *testing.T, c *ledis.Client) {
func testListKeyScan(t *testing.T, c *ledis.Client) {
for i := 0; i < 10; i++ {
if _, err := c.Do("lpush", fmt.Sprintf("%d", i), fmt.Sprintf("%d", i)); err != nil {
t.Fatal(err)
@ -129,10 +104,9 @@ func testListScan(t *testing.T, c *ledis.Client) {
}
checkScan(t, c, "LIST")
checkRevScan(t, c, "LIST")
}
func testZSetScan(t *testing.T, c *ledis.Client) {
func testZSetKeyScan(t *testing.T, c *ledis.Client) {
for i := 0; i < 10; i++ {
if _, err := c.Do("zadd", fmt.Sprintf("%d", i), i, []byte("value")); err != nil {
t.Fatal(err)
@ -140,10 +114,9 @@ func testZSetScan(t *testing.T, c *ledis.Client) {
}
checkScan(t, c, "ZSET")
checkRevScan(t, c, "ZSET")
}
func testSetScan(t *testing.T, c *ledis.Client) {
func testSetKeyScan(t *testing.T, c *ledis.Client) {
for i := 0; i < 10; i++ {
if _, err := c.Do("sadd", fmt.Sprintf("%d", i), fmt.Sprintf("%d", i)); err != nil {
t.Fatal(err)
@ -151,5 +124,54 @@ func testSetScan(t *testing.T, c *ledis.Client) {
}
checkScan(t, c, "SET")
checkRevScan(t, c, "SET")
}
func TestHashScan(t *testing.T) {
c := getTestConn()
defer c.Close()
key := "scan_hash"
c.Do("HMSET", key, "a", 1, "b", 2)
if ay, err := ledis.Values(c.Do("XHSCAN", key, "")); err != nil {
t.Fatal(err)
} else if len(ay) != 2 {
t.Fatal(len(ay))
} else {
checkScanValues(t, ay[1], "a", 1, "b", 2)
}
}
func TestSetScan(t *testing.T) {
c := getTestConn()
defer c.Close()
key := "scan_set"
c.Do("SADD", key, "a", "b")
if ay, err := ledis.Values(c.Do("XSSCAN", key, "")); err != nil {
t.Fatal(err)
} else if len(ay) != 2 {
t.Fatal(len(ay))
} else {
checkScanValues(t, ay[1], "a", "b")
}
}
func TestZSetScan(t *testing.T) {
c := getTestConn()
defer c.Close()
key := "scan_zset"
c.Do("ZADD", key, 1, "a", 2, "b")
if ay, err := ledis.Values(c.Do("XZSCAN", key, "")); err != nil {
t.Fatal(err)
} else if len(ay) != 2 {
t.Fatal(len(ay))
} else {
checkScanValues(t, ay[1], "a", 1, "b", 2)
}
}