mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-02 14:59:53 +08:00
111 lines
3.1 KiB
Go
111 lines
3.1 KiB
Go
/*
|
|
* Teleport
|
|
* Copyright (C) 2024 Gravitational, Inc.
|
|
*
|
|
* 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 lite
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/gravitational/trace"
|
|
|
|
"github.com/gravitational/teleport/lib/backend"
|
|
)
|
|
|
|
func (l *Backend) AtomicWrite(ctx context.Context, condacts []backend.ConditionalAction) (revision string, err error) {
|
|
if err := backend.ValidateAtomicWrite(condacts); err != nil {
|
|
return "", trace.Wrap(err)
|
|
}
|
|
|
|
revision = backend.CreateRevision()
|
|
var includesPut bool
|
|
|
|
err = l.inTransaction(ctx, func(tx *sql.Tx) error {
|
|
for _, ca := range condacts {
|
|
switch ca.Condition.Kind {
|
|
case backend.KindWhatever:
|
|
// no comparison to assert
|
|
case backend.KindExists:
|
|
var item backend.Item
|
|
if err := l.getInTransaction(ctx, ca.Key, tx, &item); err != nil {
|
|
if trace.IsNotFound(err) {
|
|
return trace.Wrap(backend.ErrConditionFailed)
|
|
}
|
|
return trace.Wrap(err)
|
|
}
|
|
case backend.KindNotExists:
|
|
var item backend.Item
|
|
err := l.getInTransaction(ctx, ca.Key, tx, &item)
|
|
if !trace.IsNotFound(err) {
|
|
if err == nil {
|
|
return trace.Wrap(backend.ErrConditionFailed)
|
|
}
|
|
return trace.Wrap(err)
|
|
}
|
|
case backend.KindRevision:
|
|
var item backend.Item
|
|
if err := l.getInTransaction(ctx, ca.Key, tx, &item); err != nil {
|
|
if trace.IsNotFound(err) {
|
|
return trace.Wrap(backend.ErrConditionFailed)
|
|
}
|
|
return trace.Wrap(err)
|
|
}
|
|
if item.Revision != ca.Condition.Revision {
|
|
return trace.Wrap(backend.ErrConditionFailed)
|
|
}
|
|
default:
|
|
return trace.BadParameter("unexpected condition kind %v in conditional action against key %q", ca.Condition.Kind, ca.Key)
|
|
}
|
|
}
|
|
|
|
for _, ca := range condacts {
|
|
switch ca.Action.Kind {
|
|
case backend.KindNop:
|
|
// no action to be taken
|
|
case backend.KindPut:
|
|
includesPut = true
|
|
// modify a shallow copy of item to avoid mutating condacts.
|
|
item := ca.Action.Item
|
|
item.Key = ca.Key
|
|
item.Revision = revision
|
|
if err := l.putInTransaction(ctx, item, tx); err != nil {
|
|
return trace.Wrap(err)
|
|
}
|
|
case backend.KindDelete:
|
|
if err := l.deleteInTransaction(ctx, ca.Key, tx); err != nil && !trace.IsNotFound(err) {
|
|
return trace.Wrap(err)
|
|
}
|
|
default:
|
|
return trace.BadParameter("unexpected action kind %v in conditional action against key %q", ca.Action.Kind, ca.Key)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
if err != nil {
|
|
return "", trace.Wrap(err)
|
|
}
|
|
|
|
if !includesPut {
|
|
return "", nil
|
|
}
|
|
|
|
return revision, nil
|
|
}
|