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// Copyright 2018-2019 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
use lmdb::Transaction;
use super::{DatabaseImpl, ErrorImpl, RoCursorImpl, WriteFlagsImpl};
use crate::backend::traits::{
BackendRoCursorTransaction, BackendRoTransaction, BackendRwCursorTransaction,
BackendRwTransaction,
};
#[derive(Debug)]
pub struct RoTransactionImpl<'t>(pub(crate) lmdb::RoTransaction<'t>);
impl<'t> BackendRoTransaction for RoTransactionImpl<'t> {
type Database = DatabaseImpl;
type Error = ErrorImpl;
fn get(&self, db: &Self::Database, key: &[u8]) -> Result<&[u8], Self::Error> {
self.0.get(db.0, &key).map_err(ErrorImpl::LmdbError)
}
fn abort(self) {
self.0.abort()
}
}
impl<'t> BackendRoCursorTransaction<'t> for RoTransactionImpl<'t> {
type RoCursor = RoCursorImpl<'t>;
fn open_ro_cursor(&'t self, db: &Self::Database) -> Result<Self::RoCursor, Self::Error> {
self.0
.open_ro_cursor(db.0)
.map(RoCursorImpl)
.map_err(ErrorImpl::LmdbError)
}
}
#[derive(Debug)]
pub struct RwTransactionImpl<'t>(pub(crate) lmdb::RwTransaction<'t>);
impl<'t> BackendRwTransaction for RwTransactionImpl<'t> {
type Database = DatabaseImpl;
type Error = ErrorImpl;
type Flags = WriteFlagsImpl;
fn get(&self, db: &Self::Database, key: &[u8]) -> Result<&[u8], Self::Error> {
self.0.get(db.0, &key).map_err(ErrorImpl::LmdbError)
}
fn put(
&mut self,
db: &Self::Database,
key: &[u8],
value: &[u8],
flags: Self::Flags,
) -> Result<(), Self::Error> {
self.0
.put(db.0, &key, &value, flags.0)
.map_err(ErrorImpl::LmdbError)
}
#[cfg(not(feature = "db-dup-sort"))]
fn del(&mut self, db: &Self::Database, key: &[u8]) -> Result<(), Self::Error> {
self.0.del(db.0, &key, None).map_err(ErrorImpl::LmdbError)
}
#[cfg(feature = "db-dup-sort")]
fn del(
&mut self,
db: &Self::Database,
key: &[u8],
value: Option<&[u8]>,
) -> Result<(), Self::Error> {
self.0.del(db.0, &key, value).map_err(ErrorImpl::LmdbError)
}
fn clear_db(&mut self, db: &Self::Database) -> Result<(), Self::Error> {
self.0.clear_db(db.0).map_err(ErrorImpl::LmdbError)
}
fn commit(self) -> Result<(), Self::Error> {
self.0.commit().map_err(ErrorImpl::LmdbError)
}
fn abort(self) {
self.0.abort()
}
}
impl<'t> BackendRwCursorTransaction<'t> for RwTransactionImpl<'t> {
type RoCursor = RoCursorImpl<'t>;
fn open_ro_cursor(&'t self, db: &Self::Database) -> Result<Self::RoCursor, Self::Error> {
self.0
.open_ro_cursor(db.0)
.map(RoCursorImpl)
.map_err(ErrorImpl::LmdbError)
}
}