84b72e25d2
Remove the need to query a particular KV level, and instead use slightly different encoded keys, and use prefix based iteration. This means we can use different KV stores to give the same functionality, without needing to use hierarchical KV stores.
132 lines
3 KiB
Go
132 lines
3 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rixxdb
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import (
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"github.com/abcum/rixxdb"
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"github.com/abcum/surreal/kvs"
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)
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type TX struct {
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pntr *rixxdb.TX
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}
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func one(res *rixxdb.KV, err error) (kvs.KV, error) {
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switch err {
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case nil:
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break
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default:
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return nil, &kvs.DBError{}
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case rixxdb.ErrTxNotExpectedValue:
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return nil, &kvs.KVError{}
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}
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return res, err
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}
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func many(res []*rixxdb.KV, err error) ([]kvs.KV, error) {
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switch err {
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case nil:
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break
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default:
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return nil, &kvs.DBError{}
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case rixxdb.ErrTxNotExpectedValue:
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return nil, &kvs.KVError{}
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}
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var out = make([]kvs.KV, len(res))
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for i, v := range res {
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out[i] = v
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}
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return out, err
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}
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func (tx *TX) Closed() bool {
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return tx.pntr.Closed()
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}
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func (tx *TX) Cancel() error {
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return tx.pntr.Cancel()
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}
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func (tx *TX) Commit() error {
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return tx.pntr.Commit()
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}
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func (tx *TX) Clr(key []byte) (kvs.KV, error) {
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res, err := tx.pntr.Clr(key)
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return one(res, err)
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}
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func (tx *TX) ClrP(key []byte, max uint64) ([]kvs.KV, error) {
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res, err := tx.pntr.ClrP(key, max)
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return many(res, err)
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}
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func (tx *TX) ClrR(beg []byte, end []byte, max uint64) ([]kvs.KV, error) {
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res, err := tx.pntr.ClrR(beg, end, max)
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return many(res, err)
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}
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func (tx *TX) Get(ver int64, key []byte) (kvs.KV, error) {
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res, err := tx.pntr.Get(uint64(ver), key)
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return one(res, err)
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}
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func (tx *TX) GetP(ver int64, key []byte, max uint64) ([]kvs.KV, error) {
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res, err := tx.pntr.GetP(uint64(ver), key, max)
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return many(res, err)
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}
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func (tx *TX) GetR(ver int64, beg []byte, end []byte, max uint64) ([]kvs.KV, error) {
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res, err := tx.pntr.GetR(uint64(ver), beg, end, max)
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return many(res, err)
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}
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func (tx *TX) Del(ver int64, key []byte) (kvs.KV, error) {
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res, err := tx.pntr.Del(uint64(ver), key)
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return one(res, err)
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}
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func (tx *TX) DelC(ver int64, key []byte, exp []byte) (kvs.KV, error) {
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res, err := tx.pntr.DelC(uint64(ver), key, exp)
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return one(res, err)
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}
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func (tx *TX) DelP(ver int64, key []byte, max uint64) ([]kvs.KV, error) {
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res, err := tx.pntr.DelP(uint64(ver), key, max)
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return many(res, err)
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}
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func (tx *TX) DelR(ver int64, beg []byte, end []byte, max uint64) ([]kvs.KV, error) {
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res, err := tx.pntr.DelR(uint64(ver), beg, end, max)
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return many(res, err)
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}
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func (tx *TX) Put(ver int64, key []byte, val []byte) (kvs.KV, error) {
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res, err := tx.pntr.Put(uint64(ver), key, val)
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return one(res, err)
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}
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func (tx *TX) PutC(ver int64, key []byte, val []byte, exp []byte) (kvs.KV, error) {
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res, err := tx.pntr.PutC(uint64(ver), key, val, exp)
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return one(res, err)
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}
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