116 lines
4.0 KiB
Nim
116 lines
4.0 KiB
Nim
# Nim-RocksDB
|
|
# Copyright 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)
|
|
# * GPL license, version 2.0, ([LICENSE-GPLv2](LICENSE-GPLv2) or https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html)
|
|
#
|
|
# at your option. This file may not be copied, modified, or distributed except according to those terms.
|
|
|
|
## `ColFamilyReadOnly` and `ColFamilyReadWrite` types both hold a reference to a
|
|
## `RocksDbReadOnlyRef` or `RocksDbReadWriteRef` respectively. They are convenience
|
|
## types which enable writing to a specific column family without having to specify the
|
|
## column family in each call.
|
|
##
|
|
## These column family types do not own the underlying `RocksDbRef` and therefore
|
|
## to close the database, simply call `columnFamily.db.close()` which will close
|
|
## the underlying `RocksDbRef`. Note that doing so will also impact any other column
|
|
## families that hold a reference to the same `RocksDbRef`.
|
|
|
|
{.push raises: [].}
|
|
|
|
import ./rocksdb
|
|
import ./columnfamily/cfhandle, ./rocksdb
|
|
|
|
export rocksdb
|
|
|
|
type
|
|
ColFamilyReadOnly* = object
|
|
db: RocksDbReadOnlyRef
|
|
name: string
|
|
handle: ColFamilyHandleRef
|
|
|
|
ColFamilyReadWrite* = object
|
|
db: RocksDbReadWriteRef
|
|
name: string
|
|
handle: ColFamilyHandleRef
|
|
|
|
proc getColFamily*(
|
|
db: RocksDbReadOnlyRef, name: string
|
|
): RocksDBResult[ColFamilyReadOnly] =
|
|
## Creates a new `ColFamilyReadOnly` from the given `RocksDbReadOnlyRef` and
|
|
## column family name.
|
|
doAssert not db.isClosed()
|
|
|
|
ok(ColFamilyReadOnly(db: db, name: name, handle: ?db.getColFamilyHandle(name)))
|
|
|
|
proc getColFamily*(
|
|
db: RocksDbReadWriteRef, name: string
|
|
): RocksDBResult[ColFamilyReadWrite] =
|
|
## Create a new `ColFamilyReadWrite` from the given `RocksDbReadWriteRef` and
|
|
## column family name.
|
|
doAssert not db.isClosed()
|
|
|
|
ok(ColFamilyReadWrite(db: db, name: name, handle: ?db.getColFamilyHandle(name)))
|
|
|
|
proc db*(cf: ColFamilyReadOnly | ColFamilyReadWrite): auto {.inline.} =
|
|
## Returns the underlying `RocksDbReadOnlyRef` or `RocksDbReadWriteRef`.
|
|
cf.db
|
|
|
|
proc name*(cf: ColFamilyReadOnly | ColFamilyReadWrite): string {.inline.} =
|
|
## Returns the name of the column family.
|
|
cf.name
|
|
|
|
proc handle*(
|
|
cf: ColFamilyReadOnly | ColFamilyReadWrite
|
|
): ColFamilyHandleRef {.inline.} =
|
|
## Returns the name of the column family.
|
|
cf.handle
|
|
|
|
proc get*(
|
|
cf: ColFamilyReadOnly | ColFamilyReadWrite, key: openArray[byte], onData: DataProc
|
|
): RocksDBResult[bool] {.inline.} =
|
|
## Gets the value of the given key from the column family using the `onData`
|
|
## callback.
|
|
cf.db.get(key, onData, cf.handle)
|
|
|
|
proc get*(
|
|
cf: ColFamilyReadOnly | ColFamilyReadWrite, key: openArray[byte]
|
|
): RocksDBResult[seq[byte]] {.inline.} =
|
|
## Gets the value of the given key from the column family.
|
|
cf.db.get(key, cf.handle)
|
|
|
|
proc put*(
|
|
cf: ColFamilyReadWrite, key, val: openArray[byte]
|
|
): RocksDBResult[void] {.inline.} =
|
|
## Puts a value for the given key into the column family.
|
|
cf.db.put(key, val, cf.handle)
|
|
|
|
proc keyExists*(
|
|
cf: ColFamilyReadOnly | ColFamilyReadWrite, key: openArray[byte]
|
|
): RocksDBResult[bool] {.inline.} =
|
|
## Checks if the given key exists in the column family.
|
|
cf.db.keyExists(key, cf.handle)
|
|
|
|
proc delete*(
|
|
cf: ColFamilyReadWrite, key: openArray[byte]
|
|
): RocksDBResult[void] {.inline.} =
|
|
## Deletes the given key from the column family.
|
|
cf.db.delete(key, cf.handle)
|
|
|
|
proc openIterator*(
|
|
cf: ColFamilyReadOnly | ColFamilyReadWrite
|
|
): RocksDBResult[RocksIteratorRef] {.inline.} =
|
|
## Opens an `RocksIteratorRef` for the given column family.
|
|
cf.db.openIterator(cf.handle)
|
|
|
|
proc openWriteBatch*(cf: ColFamilyReadWrite): WriteBatchRef {.inline.} =
|
|
## Opens a `WriteBatchRef` for the given column family.
|
|
cf.db.openWriteBatch(cf.handle)
|
|
|
|
proc write*(
|
|
cf: ColFamilyReadWrite, updates: WriteBatchRef
|
|
): RocksDBResult[void] {.inline.} =
|
|
## Writes the updates in the `WriteBatchRef` to the column family.
|
|
cf.db.write(updates)
|