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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package nosql
import (
"fmt"
"path"
"runtime/pprof"
"strconv"
"strings"
"code.gitea.io/gitea/modules/log"
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/opt"
)
// CloseLevelDB closes a levelDB
func (m *Manager) CloseLevelDB(connection string) error {
m.mutex.Lock()
defer m.mutex.Unlock()
db, ok := m.LevelDBConnections[connection]
if !ok {
// Try the full URI
uri := ToLevelDBURI(connection)
db, ok = m.LevelDBConnections[uri.String()]
if !ok {
// Try the datadir directly
dataDir := path.Join(uri.Host, uri.Path)
db, ok = m.LevelDBConnections[dataDir]
}
}
if !ok {
return nil
}
db.count--
if db.count > 0 {
return nil
}
for _, name := range db.name {
delete(m.LevelDBConnections, name)
}
return db.db.Close()
}
// GetLevelDB gets a levelDB for a particular connection
func (m *Manager) GetLevelDB(connection string) (db *leveldb.DB, err error) {
// Because we want associate any goroutines created by this call to the main nosqldb context we need to
// wrap this in a goroutine labelled with the nosqldb context
done := make(chan struct{})
var recovered any
go func() {
defer func() {
recovered = recover()
if recovered != nil {
log.Critical("PANIC during GetLevelDB: %v\nStacktrace: %s", recovered, log.Stack(2))
}
close(done)
}()
pprof.SetGoroutineLabels(m.ctx)
db, err = m.getLevelDB(connection)
}()
<-done
if recovered != nil {
panic(recovered)
}
return db, err
}
func (m *Manager) getLevelDB(connection string) (*leveldb.DB, error) {
// Convert the provided connection description to the common format
uri := ToLevelDBURI(connection)
// Get the datadir
dataDir := path.Join(uri.Host, uri.Path)
m.mutex.Lock()
defer m.mutex.Unlock()
db, ok := m.LevelDBConnections[connection]
if ok {
db.count++
return db.db, nil
}
db, ok = m.LevelDBConnections[uri.String()]
if ok {
db.count++
return db.db, nil
}
// if there is already a connection to this leveldb reuse that
// NOTE: if there differing options then only the first leveldb connection will be used
db, ok = m.LevelDBConnections[dataDir]
if ok {
db.count++
log.Warn("Duplicate connection to level db: %s with different connection strings. Initial connection: %s. This connection: %s", dataDir, db.name[0], connection)
db.name = append(db.name, connection)
m.LevelDBConnections[connection] = db
return db.db, nil
}
db = &levelDBHolder{
name: []string{connection, uri.String(), dataDir},
}
opts := &opt.Options{}
for k, v := range uri.Query() {
switch replacer.Replace(strings.ToLower(k)) {
case "blockcachecapacity":
opts.BlockCacheCapacity, _ = strconv.Atoi(v[0])
case "blockcacheevictremoved":
opts.BlockCacheEvictRemoved, _ = strconv.ParseBool(v[0])
case "blockrestartinterval":
opts.BlockRestartInterval, _ = strconv.Atoi(v[0])
case "blocksize":
opts.BlockSize, _ = strconv.Atoi(v[0])
case "compactionexpandlimitfactor":
opts.CompactionExpandLimitFactor, _ = strconv.Atoi(v[0])
case "compactiongpoverlapsfactor":
opts.CompactionGPOverlapsFactor, _ = strconv.Atoi(v[0])
case "compactionl0trigger":
opts.CompactionL0Trigger, _ = strconv.Atoi(v[0])
case "compactionsourcelimitfactor":
opts.CompactionSourceLimitFactor, _ = strconv.Atoi(v[0])
case "compactiontablesize":
opts.CompactionTableSize, _ = strconv.Atoi(v[0])
case "compactiontablesizemultiplier":
opts.CompactionTableSizeMultiplier, _ = strconv.ParseFloat(v[0], 64)
case "compactiontablesizemultiplierperlevel":
for _, val := range v {
f, _ := strconv.ParseFloat(val, 64)
opts.CompactionTableSizeMultiplierPerLevel = append(opts.CompactionTableSizeMultiplierPerLevel, f)
}
case "compactiontotalsize":
opts.CompactionTotalSize, _ = strconv.Atoi(v[0])
case "compactiontotalsizemultiplier":
opts.CompactionTotalSizeMultiplier, _ = strconv.ParseFloat(v[0], 64)
case "compactiontotalsizemultiplierperlevel":
for _, val := range v {
f, _ := strconv.ParseFloat(val, 64)
opts.CompactionTotalSizeMultiplierPerLevel = append(opts.CompactionTotalSizeMultiplierPerLevel, f)
}
case "compression":
val, _ := strconv.Atoi(v[0])
opts.Compression = opt.Compression(val)
case "disablebufferpool":
opts.DisableBufferPool, _ = strconv.ParseBool(v[0])
case "disableblockcache":
opts.DisableBlockCache, _ = strconv.ParseBool(v[0])
case "disablecompactionbackoff":
opts.DisableCompactionBackoff, _ = strconv.ParseBool(v[0])
case "disablelargebatchtransaction":
opts.DisableLargeBatchTransaction, _ = strconv.ParseBool(v[0])
case "errorifexist":
opts.ErrorIfExist, _ = strconv.ParseBool(v[0])
case "errorifmissing":
opts.ErrorIfMissing, _ = strconv.ParseBool(v[0])
case "iteratorsamplingrate":
opts.IteratorSamplingRate, _ = strconv.Atoi(v[0])
case "nosync":
opts.NoSync, _ = strconv.ParseBool(v[0])
case "nowritemerge":
opts.NoWriteMerge, _ = strconv.ParseBool(v[0])
case "openfilescachecapacity":
opts.OpenFilesCacheCapacity, _ = strconv.Atoi(v[0])
case "readonly":
opts.ReadOnly, _ = strconv.ParseBool(v[0])
case "strict":
val, _ := strconv.Atoi(v[0])
opts.Strict = opt.Strict(val)
case "writebuffer":
opts.WriteBuffer, _ = strconv.Atoi(v[0])
case "writel0pausetrigger":
opts.WriteL0PauseTrigger, _ = strconv.Atoi(v[0])
case "writel0slowdowntrigger":
opts.WriteL0SlowdownTrigger, _ = strconv.Atoi(v[0])
case "clientname":
db.name = append(db.name, v[0])
}
}
var err error
db.db, err = leveldb.OpenFile(dataDir, opts)
if err != nil {
if !errors.IsCorrupted(err) {
if strings.Contains(err.Error(), "resource temporarily unavailable") {
err = fmt.Errorf("unable to lock level db at %s: %w", dataDir, err)
return nil, err
}
err = fmt.Errorf("unable to open level db at %s: %w", dataDir, err)
return nil, err
}
db.db, err = leveldb.RecoverFile(dataDir, opts)
}
if err != nil {
return nil, err
}
for _, name := range db.name {
m.LevelDBConnections[name] = db
}
db.count++
return db.db, nil
}
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