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notification_storage.go
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notification_storage.go
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/*
* Copyright 2018 The Service Manager Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package postgres
import (
"context"
"errors"
"fmt"
"github.com/Peripli/service-manager/pkg/types"
"github.com/Peripli/service-manager/storage"
)
// notificationStorage storage for getting notifications and last revision
//go:generate counterfeiter . notificationStorage
type notificationStorage interface {
GetNotification(ctx context.Context, id string) (*types.Notification, error)
// GetLastRevision returns the last received notification revision
GetLastRevision(ctx context.Context) (int64, error)
}
// NewNotificationStorage returns new notification storage
func NewNotificationStorage(st storage.Storage) (*notificationStorageImpl, error) {
pgStorage, ok := st.(*PostgresStorage)
if !ok {
return nil, errors.New("expected notification storage to be Postgres")
}
return ¬ificationStorageImpl{
storage: pgStorage,
}, nil
}
type notificationStorageImpl struct {
storage *PostgresStorage
}
func (ns *notificationStorageImpl) GetLastRevision(ctx context.Context) (int64, error) {
result := make([]*Notification, 0, 1)
sqlString := fmt.Sprintf("SELECT revision FROM %s ORDER BY revision DESC LIMIT 1", NotificationTable)
err := ns.storage.SelectContext(ctx, &result, sqlString)
if err != nil {
return 0, fmt.Errorf("could not get last notification revision from db %v", err)
}
if len(result) == 0 {
return 0, nil
}
return result[0].Revision, nil
}
func (ns *notificationStorageImpl) GetNotification(ctx context.Context, id string) (*types.Notification, error) {
notificationObj, err := ns.storage.Get(ctx, types.NotificationType, id)
if err != nil {
return nil, err
}
return notificationObj.(*types.Notification), nil
}