77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
// Copyright 2013 Prometheus Team
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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 leveldb
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import (
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"fmt"
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"code.google.com/p/goprotobuf/proto"
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"github.com/jmhodges/levigo"
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)
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type batch struct {
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batch *levigo.WriteBatch
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drops uint32
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puts uint32
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}
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// NewBatch returns a fully allocated batch object.
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func NewBatch() *batch {
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return &batch{
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batch: levigo.NewWriteBatch(),
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}
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}
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func (b *batch) Drop(key proto.Message) {
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buf, _ := buffers.Get()
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defer buffers.Give(buf)
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if err := buf.Marshal(key); err != nil {
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panic(err)
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}
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b.batch.Delete(buf.Bytes())
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b.drops++
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}
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func (b *batch) Put(key, value proto.Message) {
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keyBuf, _ := buffers.Get()
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defer buffers.Give(keyBuf)
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if err := keyBuf.Marshal(key); err != nil {
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panic(err)
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}
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valBuf, _ := buffers.Get()
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defer buffers.Give(valBuf)
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if err := valBuf.Marshal(value); err != nil {
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panic(err)
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}
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b.batch.Put(keyBuf.Bytes(), valBuf.Bytes())
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b.puts++
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}
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func (b *batch) Close() {
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b.batch.Close()
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}
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func (b *batch) String() string {
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return fmt.Sprintf("LevelDB batch with %d puts and %d drops.", b.puts, b.drops)
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}
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