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table.go
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table.go
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package executor
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"regexp"
"strconv"
"strings"
"github.com/bnchain/bnchain/common/db"
"github.com/bnchain/bnchain/common/db/table"
"github.com/bnchain/bnchain/types"
ptypes "github.com/bnchain/plugin/plugin/dapp/js/types"
"github.com/bnchain/plugin/plugin/dapp/js/types/jsproto"
"github.com/robertkrimen/otto"
)
//json 表格相关的实现
//用户可以存入一个json字符串
//json 定义index 以及 format
/* table ->
{
"#tablename" : "table1",
"#primary" : "abc",
"abc" : "%18d",
"index1" : "%s",
"index2" : "%s",
}
默认值配置
{
"abc" : 0,
"index1" : "",
"index2" : "",
}
*/
//NewTable 创建一个新的表格, 返回handle
func (u *js) newTable(name, config, defaultvalue string) (id int64, err error) {
u.globalHanldeID++
id = u.globalHanldeID
row, err := NewJSONRow(config, defaultvalue)
if err != nil {
return 0, err
}
var kvdb db.KV
var prefix []byte
if row.config["#db"] == "localdb" {
kvdb = u.GetLocalDB()
_, prefix = calcAllPrefix(name)
} else if row.config["#db"] == "statedb" {
kvdb = u.GetStateDB()
prefix, _ = calcAllPrefix(name)
} else {
return 0, ptypes.ErrDBType
}
var indexs []string
for k := range row.config {
if k[0] == '#' {
continue
}
indexs = append(indexs, k)
}
opt := &table.Option{
Prefix: strings.Trim(string(prefix), "-"),
Name: row.config["#tablename"],
Primary: row.config["#primary"],
Index: indexs,
}
t, err := table.NewTable(row, kvdb, opt)
if err != nil {
return 0, err
}
u.globalTableHandle.Store(id, t)
return id, nil
}
func (u *js) newTableFunc(vm *otto.Otto, name string) {
vm.Set("table_new", func(call otto.FunctionCall) otto.Value {
config, err := call.Argument(0).ToString()
if err != nil {
return errReturn(vm, err)
}
defaultvalue, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
id, err := u.newTable(name, config, defaultvalue)
if err != nil {
return errReturn(vm, err)
}
return newObject(vm).setValue("id", id).value()
})
}
//CloseTable 关闭表格释放内存
func (u *js) closeTable(id int64) error {
_, ok := u.globalTableHandle.Load(id)
if !ok {
return types.ErrNotFound
}
u.globalTableHandle.Delete(id)
return nil
}
func (u *js) getTable(id int64) (*table.Table, error) {
if value, ok := u.globalTableHandle.Load(id); ok {
return value.(*table.Table), nil
}
return nil, types.ErrNotFound
}
func (u *js) getTabler(id int64) (tabler, error) {
if value, ok := u.globalTableHandle.Load(id); ok {
return value.(tabler), nil
}
return nil, types.ErrNotFound
}
func (u *js) registerTableFunc(vm *otto.Otto, name string) {
u.newTableFunc(vm, name)
u.tableAddFunc(vm)
u.tableReplaceFunc(vm)
u.tableDelFunc(vm)
u.tableCloseFunc(vm)
u.tableSave(vm)
u.tableJoinFunc(vm)
u.tableQueryFunc(vm)
u.tableGetFunc(vm)
u.tableJoinKeyFunc(vm)
}
func (u *js) tableJoinKeyFunc(vm *otto.Otto) {
vm.Set("table_joinkey", func(call otto.FunctionCall) otto.Value {
left, err := call.Argument(0).ToString()
if err != nil {
return errReturn(vm, err)
}
right, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
key := table.JoinKey([]byte(left), []byte(right))
return okReturn(vm, string(key))
})
}
func (u *js) tableAddFunc(vm *otto.Otto) {
vm.Set("table_add", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
tab, err := u.getTable(id)
if err != nil {
return errReturn(vm, err)
}
json, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
err = tab.Add(&jsproto.JsLog{Data: json})
if err != nil {
return errReturn(vm, err)
}
return okReturn(vm, "ok")
})
}
func (u *js) tableReplaceFunc(vm *otto.Otto) {
vm.Set("table_replace", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
tab, err := u.getTable(id)
if err != nil {
return errReturn(vm, err)
}
json, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
err = tab.Replace(&jsproto.JsLog{Data: json})
if err != nil {
return errReturn(vm, err)
}
return okReturn(vm, "ok")
})
}
func (u *js) tableDelFunc(vm *otto.Otto) {
vm.Set("table_del", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
tab, err := u.getTable(id)
if err != nil {
return errReturn(vm, err)
}
row, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
err = tab.DelRow(&jsproto.JsLog{Data: row})
if err != nil {
return errReturn(vm, err)
}
return okReturn(vm, "ok")
})
}
func (u *js) tableGetFunc(vm *otto.Otto) {
vm.Set("table_get", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
tab, err := u.getTable(id)
if err != nil {
return errReturn(vm, err)
}
key, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
row, err := call.Argument(2).ToString()
if err != nil {
return errReturn(vm, err)
}
meta := tab.GetMeta()
meta.SetPayload(&jsproto.JsLog{Data: row})
result, err := meta.Get(key)
if err != nil {
return errReturn(vm, err)
}
return okReturn(vm, string(result))
})
}
type tabler interface {
GetMeta() table.RowMeta
ListIndex(indexName string, prefix []byte, primaryKey []byte, count, direction int32) (rows []*table.Row, err error)
Save() (kvs []*types.KeyValue, err error)
}
func (u *js) tableSave(vm *otto.Otto) {
vm.Set("table_save", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
tab, err := u.getTabler(id)
if err != nil {
return errReturn(vm, err)
}
kvs, err := tab.Save()
if err != nil {
return errReturn(vm, err)
}
return newObject(vm).setValue("kvs", createKVObject(vm, kvs)).value()
})
}
func (u *js) tableCloseFunc(vm *otto.Otto) {
vm.Set("table_close", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
err = u.closeTable(id)
if err != nil {
return errReturn(vm, err)
}
return okReturn(vm, "ok")
})
}
func (u *js) tableQueryFunc(vm *otto.Otto) {
vm.Set("table_query", func(call otto.FunctionCall) otto.Value {
id, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
tab, err := u.getTabler(id)
if err != nil {
return errReturn(vm, err)
}
//参数
//List(indexName string, data types.Message, primaryKey []byte, count, direction int32) (rows []*Row, err error)
indexName, err := call.Argument(1).ToString()
if err != nil {
return errReturn(vm, err)
}
prefix, err := call.Argument(2).ToString()
if err != nil {
return errReturn(vm, err)
}
primaryKey, err := call.Argument(3).ToString()
if err != nil {
return errReturn(vm, err)
}
count, err := call.Argument(4).ToInteger()
if err != nil {
return errReturn(vm, err)
}
direction, err := call.Argument(5).ToInteger()
if err != nil {
return errReturn(vm, err)
}
bprefix := []byte(prefix)
if prefix == "" {
bprefix = nil
}
bprimaryKey := []byte(primaryKey)
if primaryKey == "" {
bprimaryKey = nil
}
rows, err := tab.ListIndex(indexName, bprefix, bprimaryKey, int32(count), int32(direction))
if err != nil {
return errReturn(vm, err)
}
_, isjoin := tab.(*table.JoinTable)
querylist := make([]interface{}, len(rows))
for i := 0; i < len(rows); i++ {
if isjoin {
joindata, ok := rows[i].Data.(*table.JoinData)
if !ok {
return errReturn(vm, errors.New("jointable has no joindata"))
}
leftdata, ok := joindata.Left.(*jsproto.JsLog)
if !ok {
return errReturn(vm, errors.New("leftdata is not JsLog"))
}
rightdata, ok := joindata.Right.(*jsproto.JsLog)
if !ok {
return errReturn(vm, errors.New("rightdata is not jslog"))
}
obj := make(map[string]interface{})
obj["left"] = leftdata.Data
obj["right"] = rightdata.Data
querylist[i] = obj
} else {
leftdata, ok := rows[i].Data.(*jsproto.JsLog)
if !ok {
return errReturn(vm, errors.New("data is not JsLog"))
}
obj := make(map[string]interface{})
obj["left"] = leftdata.Data
querylist[i] = obj
}
}
retvalue, err := vm.ToValue(querylist)
if err != nil {
return errReturn(vm, err)
}
return retvalue
})
}
func (u *js) tableJoinFunc(vm *otto.Otto) {
vm.Set("new_join_table", func(call otto.FunctionCall) otto.Value {
left, err := call.Argument(0).ToInteger()
if err != nil {
return errReturn(vm, err)
}
lefttab, err := u.getTable(left)
if err != nil {
return errReturn(vm, err)
}
right, err := call.Argument(1).ToInteger()
if err != nil {
return errReturn(vm, err)
}
righttab, err := u.getTable(right)
if err != nil {
return errReturn(vm, err)
}
index, err := call.Argument(2).ToString()
if err != nil {
return errReturn(vm, err)
}
join, err := table.NewJoinTable(lefttab, righttab, strings.Split(index, ","))
if err != nil {
return errReturn(vm, err)
}
var id int64
u.globalHanldeID++
id = u.globalHanldeID
u.globalTableHandle.Store(id, join)
return newObject(vm).setValue("id", id).value()
})
}
/*
table
要开发一个适合json的table, row 就是一个 js object
handle := new_table(config, defaultvalue)
table_add(handle, row)
table_replace(handle, row)
table_del(handle, row)
table_save(handle)
table_close(handle)
handle := new_join_table(left, right, listofjoinindex)
*/
//join table 的操作(接口完全相同)
//handle3 := new_table(newcofifg{config1, config2})
//JSONRow meta
type JSONRow struct {
*jsproto.JsLog
config map[string]string
data map[string]interface{}
lastdata types.Message
isint *regexp.Regexp
isfloat *regexp.Regexp
defaultvalue string
}
//NewJSONRow 创建一个row
func NewJSONRow(config string, defaultvalue string) (*JSONRow, error) {
row := &JSONRow{}
row.isint = regexp.MustCompile(`%\d*d`)
row.isfloat = regexp.MustCompile(`%[\.\d]*f`)
row.config = make(map[string]string)
err := json.Unmarshal([]byte(config), &row.config)
if err != nil {
return nil, err
}
row.defaultvalue = defaultvalue
row.JsLog = &jsproto.JsLog{Data: defaultvalue}
err = row.parse()
if err != nil {
return nil, err
}
return row, nil
}
//CreateRow 创建一行
func (row *JSONRow) CreateRow() *table.Row {
return &table.Row{Data: &jsproto.JsLog{Data: row.defaultvalue}}
}
func (row *JSONRow) parse() error {
row.data = make(map[string]interface{})
d := json.NewDecoder(bytes.NewBufferString(row.JsLog.Data))
d.UseNumber()
return d.Decode(&row.data)
}
//SetPayload 设置行的内容
func (row *JSONRow) SetPayload(data types.Message) error {
if row.lastdata == data {
return nil
}
row.lastdata = data
if rowdata, ok := data.(*jsproto.JsLog); ok {
row.JsLog = rowdata
return row.parse()
}
return types.ErrTypeAsset
}
//Get value of row
func (row *JSONRow) Get(key string) ([]byte, error) {
v, err := row.get(key)
return v, err
}
func (row *JSONRow) get(key string) ([]byte, error) {
if format, ok := row.config[key]; ok {
if data, ok := row.data[key]; ok {
if row.isint.Match([]byte(format)) { //int
s := fmt.Sprint(data)
num, err := strconv.ParseInt(s, 10, 64)
if err != nil {
return nil, err
}
return []byte(fmt.Sprintf(format, num)), nil
} else if row.isfloat.Match([]byte(format)) { //float
s := fmt.Sprint(data)
num, err := strconv.ParseFloat(s, 64)
if err != nil {
return nil, err
}
return []byte(fmt.Sprintf(format, num)), nil
} else { //string
if n, ok := data.(json.Number); ok {
data = n.String()
}
}
return []byte(fmt.Sprintf(format, data)), nil
}
}
return nil, errors.New("get key " + key + "from data err")
}