108 lines
2.9 KiB
Nim
108 lines
2.9 KiB
Nim
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# nimbus-eth1
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# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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## Rocksdb constructor/destructor for Kvt DB
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## =========================================
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{.push raises: [].}
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import
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std/os,
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chronicles,
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rocksdb,
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results,
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../../kvt_desc,
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./rdb_desc
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logScope:
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topics = "kvt-backend"
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# ------------------------------------------------------------------------------
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# Private helpers
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# ------------------------------------------------------------------------------
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template logTxt(info: static[string]): static[string] =
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"RocksDB/init " & info
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# ------------------------------------------------------------------------------
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# Public constructor
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# ------------------------------------------------------------------------------
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proc init*(
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rdb: var RdbInst;
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basePath: string;
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openMax: int;
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): Result[void,(KvtError,string)] =
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## Constructor c ode inspired by `RocksStoreRef.init()` from
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## kvstore_rocksdb.nim
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let
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dataDir = basePath / BaseFolder / DataFolder
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backupsDir = basePath / BaseFolder / BackupFolder
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tmpDir = basePath / BaseFolder / TempFolder
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try:
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dataDir.createDir
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except OSError, IOError:
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return err((RdbBeCantCreateDataDir, ""))
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try:
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backupsDir.createDir
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except OSError, IOError:
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return err((RdbBeCantCreateBackupDir, ""))
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try:
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tmpDir.createDir
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except OSError, IOError:
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return err((RdbBeCantCreateTmpDir, ""))
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let rc = rdb.store.init(
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dbPath=dataDir, dbBackuppath=backupsDir, readOnly=false,
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maxOpenFiles=openMax)
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if rc.isErr:
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let error = RdbBeDriverInitError
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debug logTxt "driver failed", dataDir, backupsDir, openMax,
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error, info=rc.error
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return err((RdbBeDriverInitError, rc.error))
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# The following is a default setup (subject to change)
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rdb.impOpt = rocksdb_ingestexternalfileoptions_create()
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rdb.envOpt = rocksdb_envoptions_create()
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rdb.basePath = basePath
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ok()
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proc destroy*(rdb: var RdbInst; flush: bool) =
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## Destructor
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rdb.envOpt.rocksdb_envoptions_destroy()
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rdb.impOpt.rocksdb_ingestexternalfileoptions_destroy()
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rdb.store.close()
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let
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base = rdb.basePath / BaseFolder
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try:
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(base / TempFolder).removeDir
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if flush:
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(base / DataFolder).removeDir
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# Remove the base folder if it is empty
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block done:
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for w in base.walkDirRec:
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# Ignore backup files
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if 0 < w.len and w[^1] != '~':
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break done
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base.removeDir
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except CatchableError:
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discard
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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