ipld-eth-server/libraries/shared/storage/storage_queue.go

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// 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 storage
import (
"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
"github.com/vulcanize/vulcanizedb/pkg/postgres"
)
type IStorageQueue interface {
Add(diff utils.PersistedStorageDiff) error
Delete(id int64) error
GetAll() ([]utils.PersistedStorageDiff, error)
}
type StorageQueue struct {
db *postgres.DB
}
func NewStorageQueue(db *postgres.DB) StorageQueue {
return StorageQueue{db: db}
}
func (queue StorageQueue) Add(diff utils.PersistedStorageDiff) error {
_, err := queue.db.Exec(`INSERT INTO public.queued_storage (diff_id) VALUES
($1) ON CONFLICT DO NOTHING`, diff.ID)
return err
}
func (queue StorageQueue) Delete(diffID int64) error {
_, err := queue.db.Exec(`DELETE FROM public.queued_storage WHERE diff_id = $1`, diffID)
return err
}
func (queue StorageQueue) GetAll() ([]utils.PersistedStorageDiff, error) {
var result []utils.PersistedStorageDiff
err := queue.db.Select(&result, `SELECT storage_diff.id, hashed_address, block_height, block_hash, storage_key, storage_value
FROM public.queued_storage
LEFT JOIN public.storage_diff ON queued_storage.diff_id = storage_diff.id`)
return result, err
}