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feeds_manager.go
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/
feeds_manager.go
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package loader
import (
"context"
"errors"
"github.com/graph-gophers/dataloader"
"github.com/smartcontractkit/chainlink/core/services/chainlink"
"github.com/smartcontractkit/chainlink/core/utils/stringutils"
)
type feedsBatcher struct {
app chainlink.Application
}
func (b *feedsBatcher) loadByIDs(_ context.Context, keys dataloader.Keys) []*dataloader.Result {
// Create a map for remembering the order of keys passed in
keyOrder := make(map[string]int, len(keys))
// Collect the keys to search for
var managersIDs []int64
for ix, key := range keys {
id, err := stringutils.ToInt64(key.String())
if err == nil {
managersIDs = append(managersIDs, id)
}
keyOrder[key.String()] = ix
}
// Fetch the feeds managers
managers, err := b.app.GetFeedsService().ListManagersByIDs(managersIDs)
if err != nil {
return []*dataloader.Result{{Data: nil, Error: err}}
}
// Construct the output array of dataloader results
results := make([]*dataloader.Result, len(keys))
for _, c := range managers {
id := stringutils.FromInt64(c.ID)
ix, ok := keyOrder[id]
// if found, remove from index lookup map, so we know elements were found
if ok {
results[ix] = &dataloader.Result{Data: c, Error: nil}
delete(keyOrder, id)
}
}
// fill array positions without any feeds managers
for _, ix := range keyOrder {
results[ix] = &dataloader.Result{Data: nil, Error: errors.New("feeds manager not found")}
}
return results
}