/usr/share/gocode/src/github.com/lunny/nodb/nodb.go is in golang-github-lunny-nodb-dev 0.0~git20160621.0.fc1ef06-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | package nodb
import (
"fmt"
"sync"
"time"
"github.com/lunny/log"
"github.com/lunny/nodb/config"
"github.com/lunny/nodb/store"
)
type Nodb struct {
cfg *config.Config
ldb *store.DB
dbs [MaxDBNumber]*DB
quit chan struct{}
jobs *sync.WaitGroup
binlog *BinLog
wLock sync.RWMutex //allow one write at same time
commitLock sync.Mutex //allow one write commit at same time
}
func Open(cfg *config.Config) (*Nodb, error) {
if len(cfg.DataDir) == 0 {
cfg.DataDir = config.DefaultDataDir
}
ldb, err := store.Open(cfg)
if err != nil {
return nil, err
}
l := new(Nodb)
l.quit = make(chan struct{})
l.jobs = new(sync.WaitGroup)
l.ldb = ldb
if cfg.BinLog.MaxFileNum > 0 && cfg.BinLog.MaxFileSize > 0 {
l.binlog, err = NewBinLog(cfg)
if err != nil {
return nil, err
}
} else {
l.binlog = nil
}
for i := uint8(0); i < MaxDBNumber; i++ {
l.dbs[i] = l.newDB(i)
}
l.activeExpireCycle()
return l, nil
}
func (l *Nodb) Close() {
close(l.quit)
l.jobs.Wait()
l.ldb.Close()
if l.binlog != nil {
l.binlog.Close()
l.binlog = nil
}
}
func (l *Nodb) Select(index int) (*DB, error) {
if index < 0 || index >= int(MaxDBNumber) {
return nil, fmt.Errorf("invalid db index %d", index)
}
return l.dbs[index], nil
}
func (l *Nodb) FlushAll() error {
for index, db := range l.dbs {
if _, err := db.FlushAll(); err != nil {
log.Error("flush db %d error %s", index, err.Error())
}
}
return nil
}
// very dangerous to use
func (l *Nodb) DataDB() *store.DB {
return l.ldb
}
func (l *Nodb) activeExpireCycle() {
var executors []*elimination = make([]*elimination, len(l.dbs))
for i, db := range l.dbs {
executors[i] = db.newEliminator()
}
l.jobs.Add(1)
go func() {
tick := time.NewTicker(1 * time.Second)
end := false
done := make(chan struct{})
for !end {
select {
case <-tick.C:
go func() {
for _, eli := range executors {
eli.active()
}
done <- struct{}{}
}()
<-done
case <-l.quit:
end = true
break
}
}
tick.Stop()
l.jobs.Done()
}()
}
|