94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
package tombstone
|
|
|
|
import (
|
|
"context"
|
|
"strconv"
|
|
|
|
objectV2 "github.com/TrueCloudLab/frostfs-api-go/v2/object"
|
|
"github.com/TrueCloudLab/frostfs-node/pkg/util/logger"
|
|
"github.com/TrueCloudLab/frostfs-sdk-go/object"
|
|
oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
|
|
lru "github.com/hashicorp/golang-lru"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
// Source is a tombstone source interface.
|
|
type Source interface {
|
|
// Tombstone must return tombstone from the source it was
|
|
// configured to fetch from and any error that appeared during
|
|
// fetching process.
|
|
//
|
|
// Tombstone MUST return (nil, nil) if requested tombstone is
|
|
// missing in the storage for the provided epoch.
|
|
Tombstone(ctx context.Context, a oid.Address, epoch uint64) (*object.Object, error)
|
|
}
|
|
|
|
// ExpirationChecker is a tombstone source wrapper.
|
|
// It checks tombstones presence via tombstone
|
|
// source, caches it checks its expiration.
|
|
//
|
|
// Must be created via NewChecker function. `var` and
|
|
// `ExpirationChecker{}` declarations leads to undefined behaviour
|
|
// and may lead to panics.
|
|
type ExpirationChecker struct {
|
|
cache *lru.Cache
|
|
|
|
log *logger.Logger
|
|
|
|
tsSource Source
|
|
}
|
|
|
|
// IsTombstoneAvailable checks the tombstone presence in the system in the
|
|
// following order:
|
|
// - 1. Local LRU cache;
|
|
// - 2. Tombstone source.
|
|
//
|
|
// If a tombstone was successfully fetched (regardless of its expiration)
|
|
// it is cached in the LRU cache.
|
|
func (g *ExpirationChecker) IsTombstoneAvailable(ctx context.Context, a oid.Address, epoch uint64) bool {
|
|
addrStr := a.EncodeToString()
|
|
log := g.log.With(zap.String("address", addrStr))
|
|
|
|
expEpoch, ok := g.cache.Get(addrStr)
|
|
if ok {
|
|
return expEpoch.(uint64) > epoch
|
|
}
|
|
|
|
ts, err := g.tsSource.Tombstone(ctx, a, epoch)
|
|
if err != nil {
|
|
log.Warn(
|
|
"tombstone getter: could not get the tombstone the source",
|
|
zap.Error(err),
|
|
)
|
|
} else {
|
|
if ts != nil {
|
|
return g.handleTS(addrStr, ts, epoch)
|
|
}
|
|
}
|
|
|
|
// requested tombstone not
|
|
// found in the NeoFS network
|
|
return false
|
|
}
|
|
|
|
func (g *ExpirationChecker) handleTS(addr string, ts *object.Object, reqEpoch uint64) bool {
|
|
for _, atr := range ts.Attributes() {
|
|
if atr.Key() == objectV2.SysAttributeExpEpoch {
|
|
epoch, err := strconv.ParseUint(atr.Value(), 10, 64)
|
|
if err != nil {
|
|
g.log.Warn(
|
|
"tombstone getter: could not parse tombstone expiration epoch",
|
|
zap.Error(err),
|
|
)
|
|
|
|
return false
|
|
}
|
|
|
|
g.cache.Add(addr, epoch)
|
|
return epoch >= reqEpoch
|
|
}
|
|
}
|
|
|
|
// unexpected tombstone without expiration epoch
|
|
return false
|
|
}
|