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https://github.com/prometheus/prometheus.git
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a73f061d3c
An design question was open for me in the beginning was whether to serialize other types to disk, but Protocol Buffers quickly won out, which allows us to drop support for other types. This is a good start to cleaning up a lot of cruft in the storage stack and can let us eventually decouple the various moving parts into separate subsystems for easier reasoning. This commit is not strictly required, but it is a start to making the rest a lot more enjoyable to interact with.
57 lines
1.3 KiB
Go
57 lines
1.3 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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"github.com/prometheus/prometheus/coding"
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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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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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b.batch.Delete(coding.NewPBEncoder(key).MustEncode())
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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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b.batch.Put(coding.NewPBEncoder(key).MustEncode(), coding.NewPBEncoder(value).MustEncode())
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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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