a9c07acbfa
refactor to share code in emulated batch refactor to share code in emulated merge refactor index kvstore benchmarks to share more code refactor index kvstore benchmarks to be more repeatable
89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
// Copyright (c) 2015 Couchbase, Inc.
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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
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// License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an "AS
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// IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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// express or implied. See the License for the specific language
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// governing permissions and limitations under the License.
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// +build go1.4
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package cznicb
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import ()
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type op struct {
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k []byte
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v []byte
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}
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type Batch struct {
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s *Store
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ops []op
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merges map[string][][]byte
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}
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func (b *Batch) Set(k, v []byte) {
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b.ops = append(b.ops, op{k, v})
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}
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func (b *Batch) Delete(k []byte) {
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b.ops = append(b.ops, op{k, nil})
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}
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func (b *Batch) Merge(key, val []byte) {
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ops, ok := b.merges[string(key)]
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if ok && len(ops) > 0 {
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last := ops[len(ops)-1]
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mergedVal, partialMergeOk := b.s.mo.PartialMerge(key, last, val)
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if partialMergeOk {
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// replace last entry with the result of the merge
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ops[len(ops)-1] = mergedVal
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} else {
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// could not partial merge, append this to the end
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ops = append(ops, val)
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}
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} else {
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ops = [][]byte{val}
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}
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b.merges[string(key)] = ops
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}
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func (b *Batch) Execute() (err error) {
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b.s.m.Lock()
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defer b.s.m.Unlock()
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t := b.s.t
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for key, mergeOps := range b.merges {
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k := []byte(key)
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t.Put(k, func(oldV interface{}, exists bool) (newV interface{}, write bool) {
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ob := []byte(nil)
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if exists && oldV != nil {
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ob = oldV.([]byte)
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}
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mergedVal, fullMergeOk := b.s.mo.FullMerge(k, ob, mergeOps)
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if !fullMergeOk {
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return nil, false
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}
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return mergedVal, true
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})
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}
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for _, op := range b.ops {
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if op.v != nil {
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t.Set(op.k, op.v)
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} else {
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t.Delete(op.k)
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}
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}
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return nil
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}
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func (b *Batch) Close() error {
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return nil
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}
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