ipld-eth-server/libraries/shared/fetcher/csv_tail_storage_fetcher.go
Rob Mulholand 56ce8bdb41 (VDB-950) Write raw diffs before transforming
- Raw field we can reference by FK for related data
- Enables replay for unwatched or mistransformed diffs
2019-12-03 14:51:17 -06:00

50 lines
1.5 KiB
Go

// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package fetcher
import (
"strings"
"github.com/sirupsen/logrus"
"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
"github.com/vulcanize/vulcanizedb/pkg/fs"
)
type CsvTailStorageFetcher struct {
tailer fs.Tailer
}
func NewCsvTailStorageFetcher(tailer fs.Tailer) CsvTailStorageFetcher {
return CsvTailStorageFetcher{tailer: tailer}
}
func (storageFetcher CsvTailStorageFetcher) FetchStorageDiffs(out chan<- utils.StorageDiffInput, errs chan<- error) {
t, tailErr := storageFetcher.tailer.Tail()
if tailErr != nil {
errs <- tailErr
}
logrus.Debug("fetching storage diffs...")
for line := range t.Lines {
diff, parseErr := utils.FromParityCsvRow(strings.Split(line.Text, ","))
if parseErr != nil {
errs <- parseErr
} else {
out <- diff
}
}
}