nimbus-eth1/nimbus/db/kvt/kvt_init/rocks_db/rdb_init.nim

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# nimbus-eth1
# Copyright (c) 2023-2024 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed
# except according to those terms.
## Rocksdb constructor/destructor for Kvt DB
## =========================================
{.push raises: [].}
import
std/os,
rocksdb,
results,
../../kvt_desc,
./rdb_desc
const
extraTraceMessages = false
## Enabled additional logging noise
when extraTraceMessages:
import chronicles
logScope:
topics = "kvt-backend"
# ------------------------------------------------------------------------------
# Public constructor
# ------------------------------------------------------------------------------
proc init*(
rdb: var RdbInst;
basePath: string;
openMax: int;
): Result[void,(KvtError,string)] =
## Constructor c ode inspired by `RocksStoreRef.init()` from
## kvstore_rocksdb.nim
rdb.basePath = basePath
let
dataDir = rdb.dataDir
try:
dataDir.createDir
except OSError, IOError:
return err((RdbBeCantCreateDataDir, ""))
let
cfs = @[initColFamilyDescriptor KvtFamily]
opts = defaultDbOptions()
opts.setMaxOpenFiles(openMax)
# Reserve a family corner for `Kvt` on the database
let baseDb = openRocksDb(dataDir, opts, columnFamilies=cfs).valueOr:
let errSym = RdbBeDriverInitError
when extraTraceMessages:
debug logTxt "init failed", dataDir, openMax, error=errSym, info=error
return err((errSym, error))
# Initialise `Kvt` family
rdb.store = baseDb.withColFamily(KvtFamily).valueOr:
let errSym = RdbBeDriverInitError
when extraTraceMessages:
debug logTxt "init failed", dataDir, openMax, error=errSym, info=error
return err((errSym, error))
ok()
proc init*(
rdb: var RdbInst;
store: ColFamilyReadWrite;
) =
## Piggyback on other database
rdb.store = store # that's it
proc destroy*(rdb: var RdbInst; flush: bool) =
## Destructor (no need to do anything if piggybacked)
if 0 < rdb.basePath.len:
rdb.store.db.close()
if flush:
try:
rdb.dataDir.removeDir
# Remove the base folder if it is empty
block done:
for w in rdb.baseDir.walkDirRec:
# Ignore backup files
if 0 < w.len and w[^1] != '~':
break done
rdb.baseDir.removeDir
except CatchableError:
discard
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------