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boltdb.go
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boltdb.go
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package bolt
import (
"runtime"
"sync"
"time"
"github.com/admpub/boltstore/reaper"
"github.com/admpub/boltstore/store"
"github.com/admpub/sessions"
"github.com/boltdb/bolt"
"github.com/webx-top/echo"
ss "github.com/webx-top/echo/middleware/session/engine"
)
var (
DefaultCheckInterval = time.Minute * 30
)
func New(opts *BoltOptions) sessions.Store {
store, err := NewBoltStore(opts)
if err != nil {
panic(err.Error())
}
return store
}
func Reg(store sessions.Store, args ...string) {
name := `bolt`
if len(args) > 0 {
name = args[0]
}
ss.Reg(name, store)
}
func RegWithOptions(opts *BoltOptions, args ...string) sessions.Store {
store := New(opts)
Reg(store, args...)
return store
}
type BoltOptions struct {
File string `json:"file"`
KeyPairs [][]byte `json:"-"`
BucketName string `json:"bucketName"`
MaxLength int `json:"maxLength"`
CheckInterval time.Duration `json:"checkInterval"`
}
// NewBoltStore ./sessions.db
func NewBoltStore(opts *BoltOptions) (sessions.Store, error) {
config := store.Config{
DBOptions: store.Options{
BucketName: []byte(opts.BucketName),
},
MaxLength: opts.MaxLength,
}
b := &boltStore{
config: &config,
keyPairs: opts.KeyPairs,
dbFile: opts.File,
Storex: &Storex{
Store: &store.Store{},
},
checkInterval: opts.CheckInterval,
}
b.Storex.b = b
return b, nil
}
type Storex struct {
*store.Store
db *bolt.DB
b *boltStore
}
func (s *Storex) Get(ctx echo.Context, name string) (*sessions.Session, error) {
err := s.b.Init()
if err != nil {
return nil, err
}
return s.Store.Get(ctx, name)
}
func (s *Storex) New(ctx echo.Context, name string) (*sessions.Session, error) {
return s.Store.New(ctx, name)
}
func (s *Storex) Reload(ctx echo.Context, session *sessions.Session) error {
return s.Store.Reload(ctx, session)
}
func (s *Storex) Save(ctx echo.Context, session *sessions.Session) error {
return s.Store.Save(ctx, session)
}
type boltStore struct {
*Storex
config *store.Config
keyPairs [][]byte
quiteC chan<- struct{}
doneC <-chan struct{}
dbFile string
checkInterval time.Duration
once sync.Once
}
func (c *boltStore) Close() (err error) {
// Invoke a reaper which checks and removes expired sessions periodically.
if c.quiteC != nil && c.doneC != nil {
reaper.Quit(c.quiteC, c.doneC)
}
if c.Storex.db != nil {
err = c.Storex.db.Close()
}
return
}
func (b *boltStore) Init() (err error) {
b.once.Do(func() {
err = b.init()
})
return
}
func (b *boltStore) init() (err error) {
if b.Storex.db != nil {
b.Close()
}
b.Storex.db, err = bolt.Open(b.dbFile, 0666, nil)
if err != nil {
return
}
b.Storex.Store, err = store.New(b.Storex.db, *b.config, b.keyPairs...)
if err != nil {
return
}
if b.checkInterval == 0 {
b.checkInterval = DefaultCheckInterval
}
b.quiteC, b.doneC = reaper.Run(b.Storex.db, reaper.Options{
BucketName: b.config.DBOptions.BucketName,
CheckInterval: b.checkInterval,
})
runtime.SetFinalizer(b, func(b *boltStore) {
b.Close()
})
return
}