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681de1ea89
* add key/value store service * don't export kvStoreSQL, consumers should interact with KVStore & NamespacedKVStore * add del method, avoid ErrNotFound (#38627) * switch value column to medium text Co-authored-by: Alexander Emelin <frvzmb@gmail.com>
96 lines
2.9 KiB
Go
96 lines
2.9 KiB
Go
package kvstore
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import (
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"context"
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"time"
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"github.com/grafana/grafana/pkg/infra/log"
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"github.com/grafana/grafana/pkg/services/sqlstore"
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)
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// kvStoreSQL provides a key/value store backed by the Grafana database
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type kvStoreSQL struct {
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log log.Logger
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sqlStore *sqlstore.SQLStore
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}
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// Get an item from the store
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func (kv *kvStoreSQL) Get(ctx context.Context, orgId int64, namespace string, key string) (string, bool, error) {
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item := Item{
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OrgId: &orgId,
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Namespace: &namespace,
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Key: &key,
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}
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var itemFound bool
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err := kv.sqlStore.WithDbSession(ctx, func(dbSession *sqlstore.DBSession) error {
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has, err := dbSession.Get(&item)
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if err != nil {
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kv.log.Debug("error getting kvstore value", "orgId", orgId, "namespace", namespace, "key", key, "err", err)
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return err
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}
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if !has {
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kv.log.Debug("kvstore value not found", "orgId", orgId, "namespace", namespace, "key", key)
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return nil
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}
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itemFound = true
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kv.log.Debug("got kvstore value", "orgId", orgId, "namespace", namespace, "key", key, "value", item.Value)
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return nil
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})
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return item.Value, itemFound, err
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}
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// Set an item in the store
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func (kv *kvStoreSQL) Set(ctx context.Context, orgId int64, namespace string, key string, value string) error {
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return kv.sqlStore.WithTransactionalDbSession(ctx, func(dbSession *sqlstore.DBSession) error {
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item := Item{
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OrgId: &orgId,
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Namespace: &namespace,
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Key: &key,
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}
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has, err := dbSession.Get(&item)
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if err != nil {
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kv.log.Debug("error checking kvstore value", "orgId", orgId, "namespace", namespace, "key", key, "value", value, "err", err)
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return err
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}
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if has && item.Value == value {
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kv.log.Debug("kvstore value not changed", "orgId", orgId, "namespace", namespace, "key", key, "value", value)
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return nil
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}
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item.Value = value
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item.Updated = time.Now()
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if has {
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_, err = dbSession.ID(item.Id).Update(&item)
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if err != nil {
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kv.log.Debug("error updating kvstore value", "orgId", orgId, "namespace", namespace, "key", key, "value", value, "err", err)
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} else {
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kv.log.Debug("kvstore value updated", "orgId", orgId, "namespace", namespace, "key", key, "value", value)
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}
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return err
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}
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item.Created = item.Updated
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_, err = dbSession.Insert(&item)
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if err != nil {
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kv.log.Debug("error inserting kvstore value", "orgId", orgId, "namespace", namespace, "key", key, "value", value, "err", err)
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} else {
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kv.log.Debug("kvstore value inserted", "orgId", orgId, "namespace", namespace, "key", key, "value", value)
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}
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return err
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})
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}
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// Del deletes an item from the store.
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func (kv *kvStoreSQL) Del(ctx context.Context, orgId int64, namespace string, key string) error {
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err := kv.sqlStore.WithDbSession(ctx, func(dbSession *sqlstore.DBSession) error {
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_, err := dbSession.Exec("DELETE FROM kv_store WHERE org_id=? and namespace=? and key=?", orgId, namespace, key)
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return err
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})
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return err
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}
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