mirror of
https://github.com/etcd-io/etcd.git
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70 lines
1.9 KiB
Go
70 lines
1.9 KiB
Go
// Copyright 2016 The etcd Authors
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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 compactor
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import (
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"fmt"
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"time"
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"github.com/coreos/pkg/capnslog"
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"golang.org/x/net/context"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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)
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var (
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plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "compactor")
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)
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const (
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checkCompactionInterval = 5 * time.Minute
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executeCompactionInterval = time.Hour
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ModePeriodic = "periodic"
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ModeRevision = "revision"
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)
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// Compactor purges old log from the storage periodically.
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type Compactor interface {
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// Run starts the main loop of the compactor in background.
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// Use Stop() to halt the loop and release the resource.
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Run()
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// Stop halts the main loop of the compactor.
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Stop()
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// Pause temporally suspend the compactor not to run compaction. Resume() to unpose.
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Pause()
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// Resume restarts the compactor suspended by Pause().
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Resume()
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}
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type Compactable interface {
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Compact(ctx context.Context, r *pb.CompactionRequest) (*pb.CompactionResponse, error)
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}
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type RevGetter interface {
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Rev() int64
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}
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func New(mode string, retention int, rg RevGetter, c Compactable) (Compactor, error) {
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switch mode {
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case ModePeriodic:
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return NewPeriodic(retention, rg, c), nil
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case ModeRevision:
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return NewRevision(int64(retention), rg, c), nil
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default:
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return nil, fmt.Errorf("unsupported compaction mode %s", mode)
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}
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}
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