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103 lines
2.4 KiB
Go
103 lines
2.4 KiB
Go
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package leveldb
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import (
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"github.com/syndtr/goleveldb/leveldb/errors"
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"github.com/syndtr/goleveldb/leveldb/iterator"
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"github.com/syndtr/goleveldb/leveldb/opt"
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"github.com/syndtr/goleveldb/leveldb/storage"
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"github.com/syndtr/goleveldb/leveldb/util"
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)
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// Reader is the interface that wraps basic Get and NewIterator methods.
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// This interface implemented by both DB and Snapshot.
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type Reader interface {
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Get(key []byte, ro *opt.ReadOptions) (value []byte, err error)
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NewIterator(slice *util.Range, ro *opt.ReadOptions) iterator.Iterator
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}
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// Sizes is list of size.
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type Sizes []int64
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// Sum returns sum of the sizes.
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func (sizes Sizes) Sum() int64 {
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var sum int64
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for _, size := range sizes {
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sum += size
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}
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return sum
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}
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// Logging.
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func (db *DB) log(v ...interface{}) { db.s.log(v...) }
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func (db *DB) logf(format string, v ...interface{}) { db.s.logf(format, v...) }
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// Check and clean files.
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func (db *DB) checkAndCleanFiles() error {
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v := db.s.version()
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defer v.release()
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tmap := make(map[int64]bool)
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for _, tables := range v.levels {
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for _, t := range tables {
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tmap[t.fd.Num] = false
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}
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}
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fds, err := db.s.stor.List(storage.TypeAll)
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if err != nil {
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return err
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}
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var nt int
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var rem []storage.FileDesc
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for _, fd := range fds {
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keep := true
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switch fd.Type {
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case storage.TypeManifest:
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keep = fd.Num >= db.s.manifestFd.Num
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case storage.TypeJournal:
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if !db.frozenJournalFd.Zero() {
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keep = fd.Num >= db.frozenJournalFd.Num
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} else {
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keep = fd.Num >= db.journalFd.Num
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}
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case storage.TypeTable:
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_, keep = tmap[fd.Num]
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if keep {
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tmap[fd.Num] = true
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nt++
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}
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}
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if !keep {
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rem = append(rem, fd)
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}
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}
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if nt != len(tmap) {
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var mfds []storage.FileDesc
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for num, present := range tmap {
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if !present {
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mfds = append(mfds, storage.FileDesc{storage.TypeTable, num})
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db.logf("db@janitor table missing @%d", num)
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}
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}
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return errors.NewErrCorrupted(storage.FileDesc{}, &errors.ErrMissingFiles{Fds: mfds})
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}
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db.logf("db@janitor F·%d G·%d", len(fds), len(rem))
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for _, fd := range rem {
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db.logf("db@janitor removing %s-%d", fd.Type, fd.Num)
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if err := db.s.stor.Remove(fd); err != nil {
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return err
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}
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}
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return nil
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}
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