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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 evtforward
import (
"context"
"code.vegaprotocol.io/vega/core/types"
vgcontext "code.vegaprotocol.io/vega/libs/context"
"code.vegaprotocol.io/vega/libs/proto"
snapshotpb "code.vegaprotocol.io/vega/protos/vega/snapshot/v1"
"github.com/emirpasic/gods/sets/treeset"
)
var (
key = (&types.PayloadEventForwarder{}).Key()
hashKeys = []string{
key,
}
)
type efSnapshotState struct{}
func (f *Forwarder) Namespace() types.SnapshotNamespace {
return types.EventForwarderSnapshot
}
func (f *Forwarder) Keys() []string {
return hashKeys
}
func (f *Forwarder) Stopped() bool {
return false
}
func (f *Forwarder) serialise() ([]byte, error) {
slice := make([]*snapshotpb.EventForwarderBucket, 0, f.ackedEvts.Size())
iter := f.ackedEvts.events.Iterator()
for iter.Next() {
v := (iter.Value().(*ackedEvtBucket))
slice = append(slice, &snapshotpb.EventForwarderBucket{
Ts: v.ts,
Hashes: v.hashes,
})
}
payload := types.Payload{
Data: &types.PayloadEventForwarder{
Buckets: slice,
},
}
return proto.Marshal(payload.IntoProto())
}
// get the serialised form of the given key.
func (f *Forwarder) getSerialised(k string) (data []byte, err error) {
if k != key {
return nil, types.ErrSnapshotKeyDoesNotExist
}
return f.serialise()
}
func (f *Forwarder) GetState(k string) ([]byte, []types.StateProvider, error) {
state, err := f.getSerialised(k)
return state, nil, err
}
func (f *Forwarder) LoadState(ctx context.Context, p *types.Payload) ([]types.StateProvider, error) {
if f.Namespace() != p.Data.Namespace() {
return nil, types.ErrInvalidSnapshotNamespace
}
// see what we're reloading
if pl, ok := p.Data.(*types.PayloadEventForwarder); ok {
f.restore(ctx, pl)
return nil, nil
}
return nil, types.ErrUnknownSnapshotType
}
func (f *Forwarder) restore(ctx context.Context, p *types.PayloadEventForwarder) {
f.ackedEvts = &ackedEvents{
timeService: f.timeService,
events: treeset.NewWith(ackedEvtBucketComparator),
}
// upgrading from 73.12, we need to load previous snapshot format
if vgcontext.InProgressUpgradeFrom(ctx, "v0.73.14") {
// add at 0 time, so it's always way in the past.
bucket := &ackedEvtBucket{
ts: 0,
hashes: []string{},
}
bucket.hashes = append(bucket.hashes, p.Keys...)
f.ackedEvts.events.Add(bucket)
return
}
for _, v := range p.Buckets {
f.ackedEvts.AddAt(v.Ts, v.Hashes...)
}
}