nim-eth/eth/db/kvstore_rocksdb.nim

53 lines
1.3 KiB
Nim

{.push raises: [Defect].}
import
std/os,
rocksdb, stew/results,
./kvstore
export results
const maxOpenFiles = 512
type
RocksStoreRef* = ref object of RootObj
store: RocksDBInstance
proc get*(db: RocksStoreRef, key: openArray[byte], onData: kvstore.DataProc): KvResult[bool] =
db.store.get(key, onData)
proc find*(db: RocksStoreRef, prefix: openArray[byte], onFind: kvstore.KeyValueProc): KvResult[int] =
raiseAssert "Unimplemented"
proc put*(db: RocksStoreRef, key, value: openArray[byte]): KvResult[void] =
db.store.put(key, value)
proc contains*(db: RocksStoreRef, key: openArray[byte]): KvResult[bool] =
db.store.contains(key)
proc del*(db: RocksStoreRef, key: openArray[byte]): KvResult[void] =
db.store.del(key)
proc close*(db: RocksStoreRef) =
db.store.close
proc init*(
T: type RocksStoreRef, basePath: string, name: string,
readOnly = false): KvResult[T] =
let
dataDir = basePath / name / "data"
backupsDir = basePath / name / "backups"
try:
createDir(dataDir)
createDir(backupsDir)
except OSError, IOError:
return err("rocksdb: cannot create database directory")
var store: RocksDBInstance
if (let v = store.init(
dataDir, backupsDir, readOnly, maxOpenFiles = maxOpenFiles); v.isErr):
return err(v.error)
ok(T(store: store))