110 lines
3.7 KiB
Nim
110 lines
3.7 KiB
Nim
# 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.
|
|
|
|
## Persistent constructor for Aristo DB
|
|
## ====================================
|
|
##
|
|
## This module automatically pulls in the persistent backend library at the
|
|
## linking stage (e.g. `rocksdb`) which can be avoided for pure memory DB
|
|
## applications by importing `./aristo_init/memory_only` (rather than
|
|
## `./aristo_init/persistent`.)
|
|
##
|
|
{.push raises: [].}
|
|
|
|
import
|
|
results,
|
|
rocksdb,
|
|
../../opts,
|
|
../aristo_desc,
|
|
./rocks_db/rdb_desc,
|
|
"."/[rocks_db, memory_only]
|
|
|
|
export
|
|
AristoDbRef,
|
|
RdbBackendRef,
|
|
RdbWriteEventCb,
|
|
memory_only
|
|
|
|
# ------------------------------------------------------------------------------
|
|
# Private helpers
|
|
# ------------------------------------------------------------------------------
|
|
|
|
proc newAristoRdbDbRef(
|
|
basePath: string;
|
|
opts: DbOptions;
|
|
dbOpts: DbOptionsRef;
|
|
cfOpts: ColFamilyOptionsRef;
|
|
guestCFs: openArray[ColFamilyDescriptor];
|
|
): Result[(AristoDbRef, seq[ColFamilyReadWrite]), AristoError]=
|
|
let
|
|
(be, oCfs) = ? rocksDbBackend(basePath, opts, dbOpts, cfOpts, guestCFs)
|
|
vTop = block:
|
|
let rc = be.getTuvFn()
|
|
if rc.isErr:
|
|
be.closeFn(eradicate = false)
|
|
return err(rc.error)
|
|
rc.value
|
|
ok((AristoDbRef(
|
|
top: LayerRef(vTop: vTop),
|
|
backend: be,
|
|
accLeaves: LruCache[Hash32, VertexRef].init(ACC_LRU_SIZE),
|
|
stoLeaves: LruCache[Hash32, VertexRef].init(ACC_LRU_SIZE),
|
|
), oCfs))
|
|
|
|
# ------------------------------------------------------------------------------
|
|
# Public database constuctors, destructor
|
|
# ------------------------------------------------------------------------------
|
|
|
|
proc init*(
|
|
T: type AristoDbRef;
|
|
B: type RdbBackendRef;
|
|
basePath: string;
|
|
opts: DbOptions;
|
|
dbOpts: DbOptionsRef;
|
|
cfOpts: ColFamilyOptionsRef;
|
|
guestCFs: openArray[ColFamilyDescriptor];
|
|
): Result[(T, seq[ColFamilyReadWrite]), AristoError] =
|
|
## Generic constructor, `basePath` argument is ignored for memory backend
|
|
## databases (which also unconditionally succeed initialising.)
|
|
##
|
|
basePath.newAristoRdbDbRef opts, dbOpts, cfOpts, guestCFs
|
|
|
|
proc activateWrTrigger*(
|
|
db: AristoDbRef;
|
|
hdl: RdbWriteEventCb;
|
|
): Result[void,AristoError] =
|
|
## This function allows to link an application to the `Aristo` storage event
|
|
## for the `RocksDb` backend via call back argument function `hdl`.
|
|
##
|
|
## The argument handler `hdl` of type
|
|
## ::
|
|
## proc(session: WriteBatchRef): bool
|
|
##
|
|
## will be invoked when a write batch for the `Aristo` database is opened in
|
|
## order to save current changes to the backend. The `session` argument passed
|
|
## to the handler in conjunction with a list of `ColFamilyReadWrite` items
|
|
## (as returned from `reinit()`) might be used to store additional items
|
|
## to the database with the same write batch.
|
|
##
|
|
## If the handler returns `true` upon return from running, the write batch
|
|
## will proceed saving. Otherwise it is aborted and no data are saved at all.
|
|
##
|
|
case db.backend.kind:
|
|
of BackendRocksDB:
|
|
db.backend.rocksDbSetEventTrigger hdl
|
|
of BackendRdbHosting:
|
|
err(RdbBeWrTriggerActiveAlready)
|
|
else:
|
|
err(RdbBeTypeUnsupported)
|
|
|
|
# ------------------------------------------------------------------------------
|
|
# End
|
|
# ------------------------------------------------------------------------------
|