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https://github.com/c9s/bbgo.git
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query market config with cache
This commit is contained in:
parent
180bfff558
commit
40c697275d
52
pkg/bbgo/cache.go
Normal file
52
pkg/bbgo/cache.go
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@ -0,0 +1,52 @@
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package bbgo
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import (
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"encoding/json"
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"io/ioutil"
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"os"
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"path"
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"reflect"
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"github.com/pkg/errors"
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)
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func WithCache(file string, obj interface{}, do func() (interface{}, error)) error {
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cacheDir := CacheDir()
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cacheFile := path.Join(cacheDir, file)
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if _, err := os.Stat(cacheFile); os.IsNotExist(err) {
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data, err := do()
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if err != nil {
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return err
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}
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out, err := json.Marshal(data)
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if err != nil {
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return err
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}
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if err := ioutil.WriteFile(cacheFile, out, 0666); err != nil {
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return err
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}
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rv := reflect.ValueOf(obj).Elem()
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if !rv.CanSet() {
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return errors.New("can not set cache object value")
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}
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rv.Set(reflect.ValueOf(data))
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} else {
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data, err := ioutil.ReadFile(cacheFile)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(data, obj); err != nil {
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return err
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}
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}
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return nil
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}
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@ -2,10 +2,12 @@ package bbgo
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"github.com/jmoiron/sqlx"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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@ -59,11 +61,19 @@ func (environ *Environment) AddExchange(name string, exchange types.Exchange) (s
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func (environ *Environment) Init(ctx context.Context) (err error) {
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for _, session := range environ.sessions {
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markets, err := session.Exchange.QueryMarkets(ctx)
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var markets types.MarketMap
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err = WithCache(fmt.Sprintf("%s-markets.json", session.Exchange.Name()), &markets, func() (interface{}, error) {
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return session.Exchange.QueryMarkets(ctx)
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})
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if err != nil {
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return err
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}
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if len(markets) == 0 {
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return errors.Errorf("market config should not be empty")
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}
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session.markets = markets
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session.Account = &types.Account{}
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session.Stream = session.Exchange.NewStream()
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