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historyleveldb.go
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historyleveldb.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package historyleveldb
import (
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/common/ledger/blkstorage"
"github.com/hyperledger/fabric/common/ledger/util/leveldbhelper"
"github.com/hyperledger/fabric/core/ledger"
"github.com/hyperledger/fabric/core/ledger/kvledger/history/historydb"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/rwsetutil"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/version"
"github.com/hyperledger/fabric/core/ledger/ledgerconfig"
"github.com/hyperledger/fabric/core/ledger/util"
"github.com/hyperledger/fabric/protos/common"
protoutil "github.com/hyperledger/fabric/protoutil"
)
var logger = flogging.MustGetLogger("historyleveldb")
var savePointKey = []byte{0x00}
var emptyValue = []byte{}
// HistoryDBProvider implements interface HistoryDBProvider
type HistoryDBProvider struct {
dbProvider *leveldbhelper.Provider
}
// NewHistoryDBProvider instantiates HistoryDBProvider
func NewHistoryDBProvider() *HistoryDBProvider {
dbPath := ledgerconfig.GetHistoryLevelDBPath()
logger.Debugf("constructing HistoryDBProvider dbPath=%s", dbPath)
dbProvider := leveldbhelper.NewProvider(&leveldbhelper.Conf{DBPath: dbPath})
return &HistoryDBProvider{dbProvider}
}
// GetDBHandle gets the handle to a named database
func (provider *HistoryDBProvider) GetDBHandle(dbName string) (historydb.HistoryDB, error) {
return newHistoryDB(provider.dbProvider.GetDBHandle(dbName), dbName), nil
}
// Close closes the underlying db
func (provider *HistoryDBProvider) Close() {
provider.dbProvider.Close()
}
// historyDB implements HistoryDB interface
type historyDB struct {
db *leveldbhelper.DBHandle
dbName string
}
// newHistoryDB constructs an instance of HistoryDB
func newHistoryDB(db *leveldbhelper.DBHandle, dbName string) *historyDB {
return &historyDB{db, dbName}
}
// Open implements method in HistoryDB interface
func (historyDB *historyDB) Open() error {
// do nothing because shared db is used
return nil
}
// Close implements method in HistoryDB interface
func (historyDB *historyDB) Close() {
// do nothing because shared db is used
}
// Commit implements method in HistoryDB interface
func (historyDB *historyDB) Commit(block *common.Block) error {
blockNo := block.Header.Number
//Set the starting tranNo to 0
var tranNo uint64
dbBatch := leveldbhelper.NewUpdateBatch()
logger.Debugf("Channel [%s]: Updating history database for blockNo [%v] with [%d] transactions",
historyDB.dbName, blockNo, len(block.Data.Data))
// Get the invalidation byte array for the block
txsFilter := util.TxValidationFlags(block.Metadata.Metadata[common.BlockMetadataIndex_TRANSACTIONS_FILTER])
// write each tran's write set to history db
for _, envBytes := range block.Data.Data {
// If the tran is marked as invalid, skip it
if txsFilter.IsInvalid(int(tranNo)) {
logger.Debugf("Channel [%s]: Skipping history write for invalid transaction number %d",
historyDB.dbName, tranNo)
tranNo++
continue
}
env, err := protoutil.GetEnvelopeFromBlock(envBytes)
if err != nil {
return err
}
payload, err := protoutil.GetPayload(env)
if err != nil {
return err
}
chdr, err := protoutil.UnmarshalChannelHeader(payload.Header.ChannelHeader)
if err != nil {
return err
}
if common.HeaderType(chdr.Type) == common.HeaderType_ENDORSER_TRANSACTION {
// extract actions from the envelope message
respPayload, err := protoutil.GetActionFromEnvelope(envBytes)
if err != nil {
return err
}
//preparation for extracting RWSet from transaction
txRWSet := &rwsetutil.TxRwSet{}
// Get the Result from the Action and then Unmarshal
// it into a TxReadWriteSet using custom unmarshalling
if err = txRWSet.FromProtoBytes(respPayload.Results); err != nil {
return err
}
// for each transaction, loop through the namespaces and writesets
// and add a history record for each write
for _, nsRWSet := range txRWSet.NsRwSets {
ns := nsRWSet.NameSpace
for _, kvWrite := range nsRWSet.KvRwSet.Writes {
writeKey := kvWrite.Key
//composite key for history records is in the form ns~key~blockNo~tranNo
compositeHistoryKey := historydb.ConstructCompositeHistoryKey(ns, writeKey, blockNo, tranNo)
// No value is required, write an empty byte array (emptyValue) since Put() of nil is not allowed
dbBatch.Put(compositeHistoryKey, emptyValue)
}
}
} else {
logger.Debugf("Skipping transaction [%d] since it is not an endorsement transaction\n", tranNo)
}
tranNo++
}
// add savepoint for recovery purpose
height := version.NewHeight(blockNo, tranNo)
dbBatch.Put(savePointKey, height.ToBytes())
// write the block's history records and savepoint to LevelDB
// Setting snyc to true as a precaution, false may be an ok optimization after further testing.
if err := historyDB.db.WriteBatch(dbBatch, true); err != nil {
return err
}
logger.Debugf("Channel [%s]: Updates committed to history database for blockNo [%v]", historyDB.dbName, blockNo)
return nil
}
// NewHistoryQueryExecutor implements method in HistoryDB interface
func (historyDB *historyDB) NewHistoryQueryExecutor(blockStore blkstorage.BlockStore) (ledger.HistoryQueryExecutor, error) {
return &LevelHistoryDBQueryExecutor{historyDB, blockStore}, nil
}
// GetBlockNumFromSavepoint implements method in HistoryDB interface
func (historyDB *historyDB) GetLastSavepoint() (*version.Height, error) {
versionBytes, err := historyDB.db.Get(savePointKey)
if err != nil || versionBytes == nil {
return nil, err
}
height, _ := version.NewHeightFromBytes(versionBytes)
return height, nil
}
// ShouldRecover implements method in interface kvledger.Recoverer
func (historyDB *historyDB) ShouldRecover(lastAvailableBlock uint64) (bool, uint64, error) {
if !ledgerconfig.IsHistoryDBEnabled() {
return false, 0, nil
}
savepoint, err := historyDB.GetLastSavepoint()
if err != nil {
return false, 0, err
}
if savepoint == nil {
return true, 0, nil
}
return savepoint.BlockNum != lastAvailableBlock, savepoint.BlockNum + 1, nil
}
// CommitLostBlock implements method in interface kvledger.Recoverer
func (historyDB *historyDB) CommitLostBlock(blockAndPvtdata *ledger.BlockAndPvtData) error {
block := blockAndPvtdata.Block
// log every 1000th block at Info level so that history rebuild progress can be tracked in production envs.
if block.Header.Number%1000 == 0 {
logger.Infof("Recommitting block [%d] to history database", block.Header.Number)
} else {
logger.Debugf("Recommitting block [%d] to history database", block.Header.Number)
}
if err := historyDB.Commit(block); err != nil {
return err
}
return nil
}