数据集合中的记录。
object
exchange.GetData(key)
exchange.GetData(key, timeout)
数据集合名称。
key
true
string
用于设置缓存超时，单位为毫秒。实盘时默认为一分钟缓存超时。
timeout
false
number
```javascript
/*backtest
start: 2020-01-21 00:00:00
end: 2020-02-12 00:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Bitfinex","currency":"BTC_USD"}]
*/
function main() {
exchange.SetData("test", [[1579536000000, _D(1579536000000)], [1579622400000, _D(1579622400000)], [1579708800000, _D(1579708800000)]])
while(true) {
Log(exchange.GetData("test"))
Sleep(1000 * 60 * 60 * 24)
}
}
'''backtest
start: 2020-01-21 00:00:00
end: 2020-02-12 00:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Bitfinex","currency":"BTC_USD"}]
'''
def main():
exchange.SetData("test", [[1579536000000, _D(1579536000000/1000)], [1579622400000, _D(1579622400000/1000)], [1579708800000, _D(1579708800000/1000)]])
while True:
Log(exchange.GetData("test"))
Sleep(1000 * 60 * 60 * 24)
/*backtest
start: 2020-01-21 00:00:00
end: 2020-02-12 00:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Bitfinex","currency":"BTC_USD"}]
*/
void main() {
json arr = R"([[1579536000000, ""], [1579622400000, ""], [1579708800000, ""]])"_json;
arr[0][1] = _D(1579536000000);
arr[1][1] = _D(1579622400000);
arr[2][1] = _D(1579708800000);
exchange.SetData("test", arr);
while(true) {
Log(exchange.GetData("test"));
Sleep(1000 * 60 * 60 * 24);
}
}
获取直接写入的数据的调用方式。
/*backtest
start: 2020-01-21 00:00:00
end: 2020-02-12 00:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Bitfinex","currency":"BTC_USD"}]
*/
function main() {
while(true) {
Log(exchange.GetData("http://xxx.xx.x.xx:9090/data"))
Sleep(1000)
}
}
'''backtest
start: 2020-01-21 00:00:00
end: 2020-02-12 00:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Bitfinex","currency":"BTC_USD"}]
'''
def main():
while True:
Log(exchange.GetData("http://xxx.xx.x.xx:9090/data"))
Sleep(1000)
/*backtest
start: 2020-01-21 00:00:00
end: 2020-02-12 00:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Bitfinex","currency":"BTC_USD"}]
*/
void main() {
while(true) {
Log(exchange.GetData("http://xxx.xx.x.xx:9090/data"));
Sleep(1000);
}
}
支持通过外部链接请求数据，请求到的数据格式：
{
"schema":["time","data"],
"data":[
[1579536000000, "abc"],
[1579622400000, 123],
[1579708800000, {"price": 123}],
[1579795200000, ["abc", 123, {"price": 123}]]
]
}
其中schema为加载数据的主体中的每一条记录的数据格式，该格式固定为["time","data"]对应data属性中的逐条数据的格式。
测试用的服务程序，使用Go语言编写：
```golang
package main
import (
"fmt"
"net/http"
"encoding/json"
)
func Handle (w http.ResponseWriter, r *http.Request) {
defer func() {
fmt.Println("req:", *r)
ret := map[string]interface{}{
"schema": []string{"time","data"},
"data": []interface{}{
[]interface{}{1579536000000, "abc"},
[]interface{}{1579622400000, 123},
[]interface{}{1579708800000, map[string]interface{}{"price":123}},
[]interface{}{1579795200000, []interface{}{"abc", 123, map[string]interface{}{"price":123}}},
},
}
b, _ := json.Marshal(ret)
w.Write(b)
}()
}
func main () {
fmt.Println("listen http://localhost:9090")
http.HandleFunc("/data", Handle)
http.ListenAndServe(":9090", nil)
}
程序在接收到请求后的应答数据：
{
"schema":["time","data"],
"data":[
[1579536000000, "abc"],
[1579622400000, 123],
[1579708800000, {"price": 123}],
[1579795200000, ["abc", 123, {"price": 123}]]
]
}
测试策略代码：
function main() {
Log(exchange.GetData("http://xxx.xx.x.xx:9090/data"))
Log(exchange.GetData("https://www.fmz.com/upload/asset/32bf73a69fc12d36e76.json"))
}
def main():
Log(exchange.GetData("http://xxx.xx.x.xx:9090/data"))
Log(exchange.GetData("https://www.fmz.com/upload/asset/32bf73a69fc12d36e76.json"))
void main() {
Log(exchange.GetData("http://xxx.xx.x.xx:9090/data"));
Log(exchange.GetData("https://www.fmz.com/upload/asset/32bf73a69fc12d36e76.json"));
}
获取外部链接的数据的调用方式。
function main() {
Log(exchange.GetData("https://www.datadata.com/api/v1/query/xxx/data")) // 链接中xxx部分为查询的数据的编码，此处xxx为举例
}
def main():
Log(exchange.GetData("https://www.datadata.com/api/v1/query/xxx/data"))
void main() {
Log(exchange.GetData("https://www.datadata.com/api/v1/query/xxx/data"));
}
请求datadata平台上创建的查询数据，要求应答的数据格式为(必须有time、data字段在schema里描述)：
{
"data": [],
"schema": ["time", "data"]
}
其中”data”字段为需要的数据内容，”data”字段中的数据需要与”schema”中约定的一致。当调用exchange.GetData()函数时，返回一个JSON对象，例如：{"Time":1579795200000, "Data":"..."}。
回测时一次性获取数据，实盘时缓存一分钟的数据。 回测系统中，当使用访问接口请求数据的方式时，回测系统会自动给请求增加from(时间戳秒)，to(时间戳秒)， period(底层K线周期，时间戳毫秒)等参数，用于确定要获取数据的时间范围。
{@fun/Market/exchange.SetData exchange.SetData}
exchange.SetData exchange.GetMarkets