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snapshot.go
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snapshot.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// 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 epochtime
import (
"context"
"code.vegaprotocol.io/vega/core/types"
"code.vegaprotocol.io/vega/protos/vega"
"code.vegaprotocol.io/vega/libs/proto"
)
func (s *Svc) serialise() error {
s.state.Seq = s.epoch.Seq
s.state.StartTime = s.epoch.StartTime
s.state.ExpireTime = s.epoch.ExpireTime
s.state.ReadyToStartNewEpoch = s.readyToStartNewEpoch
s.state.ReadyToEndEpoch = s.readyToEndEpoch
data, err := proto.Marshal(s.pl.IntoProto())
if err != nil {
return err
}
s.data = data
return nil
}
func (s *Svc) Namespace() types.SnapshotNamespace {
return types.EpochSnapshot
}
func (s *Svc) Keys() []string {
return []string{s.pl.Key()}
}
func (s *Svc) Stopped() bool {
return false
}
func (s *Svc) GetState(k string) ([]byte, []types.StateProvider, error) {
if k != s.pl.Key() {
return nil, nil, types.ErrSnapshotKeyDoesNotExist
}
s.serialise()
return s.data, nil, nil
}
func (s *Svc) LoadState(ctx context.Context, payload *types.Payload) ([]types.StateProvider, error) {
if s.Namespace() != payload.Data.Namespace() {
return nil, types.ErrInvalidSnapshotNamespace
}
switch pl := payload.Data.(type) {
case *types.PayloadEpoch:
snap := pl.EpochState
s.epoch = types.Epoch{
Seq: snap.Seq,
StartTime: snap.StartTime,
ExpireTime: snap.ExpireTime,
Action: vega.EpochAction_EPOCH_ACTION_START,
}
s.readyToStartNewEpoch = snap.ReadyToStartNewEpoch
s.readyToEndEpoch = snap.ReadyToEndEpoch
// notify all the engines that store epoch data about the current restored epoch
s.notifyRestore(ctx, s.epoch)
return nil, s.serialise()
default:
return nil, types.ErrUnknownSnapshotType
}
}
func (s *Svc) notifyRestore(ctx context.Context, e types.Epoch) {
for _, f := range s.restoreListeners {
f(ctx, e)
}
}