package boltease import ( "fmt" "os" "strconv" "strings" "time" "github.com/boltdb/bolt" ) // This is a library for easing the use of bolt dbs // DB is a struct for accomplishing this type DB struct { filename string boltDB *bolt.DB mode os.FileMode options *bolt.Options dbIsOpen bool } // Create makes sure we can get open the file and returns the DB object func Create(fn string, m os.FileMode, opts *bolt.Options) (*DB, error) { var err error b := DB{filename: fn, mode: m, options: opts} b.boltDB, err = bolt.Open(fn, m, opts) if err != nil { return nil, err } defer b.boltDB.Close() return &b, nil } func (b *DB) OpenDB() error { if b.dbIsOpen { // DB is already open, that's fine. return nil } var err error if b.boltDB, err = bolt.Open(b.filename, b.mode, b.options); err != nil { return err } b.dbIsOpen = true return err } func (b *DB) CloseDB() error { if !b.dbIsOpen { // DB is already closed, that's fine. return nil } var err error if err = b.boltDB.Close(); err != nil { return err } b.dbIsOpen = false return err } // MkBucketPath builds all buckets in the string slice func (b *DB) MkBucketPath(path []string) error { var err error if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return err } defer b.CloseDB() } err = b.boltDB.Update(func(tx *bolt.Tx) error { var err error bkt := tx.Bucket([]byte(path[0])) if bkt == nil { // Create it bkt, err = tx.CreateBucket([]byte(path[0])) if err != nil { // error creating return err } } if len(path) > 1 { path = path[1:] for i := range path { nextBkt := bkt.Bucket([]byte(path[i])) if nextBkt == nil { // Create it nextBkt, err = bkt.CreateBucket([]byte(path[i])) if err != nil { return err } } bkt = nextBkt } } return err }) return err } // GetValue returns the value at path // path is a slice of strings // key is the key to get func (b *DB) GetValue(path []string, key string) (string, error) { var err error var ret string if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return ret, err } defer b.CloseDB() } err = b.boltDB.View(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } for idx := 1; idx < len(path); idx++ { bkt = bkt.Bucket([]byte(path[idx])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/")) } } // newBkt should have the last bucket in the path ret = string(bkt.Get([]byte(key))) return nil }) return ret, err } // SetValue sets the value of key at path to val // path is a slice of tokens func (b *DB) SetValue(path []string, key, val string) error { var err error if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return err } defer b.CloseDB() } err = b.MkBucketPath(path) if err != nil { return err } err = b.boltDB.Update(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } for idx := 1; idx < len(path); idx++ { bkt, err = bkt.CreateBucketIfNotExists([]byte(path[idx])) if err != nil { return err } } // bkt should have the last bucket in the path return bkt.Put([]byte(key), []byte(val)) }) return err } // GetInt returns the value at path // If the value cannot be parsed as an int, error func (b *DB) GetInt(path []string, key string) (int, error) { var ret int r, err := b.GetValue(path, key) if err == nil { ret, err = strconv.Atoi(r) } return ret, err } // SetInt Sets an integer value func (b *DB) SetInt(path []string, key string, val int) error { return b.SetValue(path, key, strconv.Itoa(val)) } // GetBool returns the value at 'path' // If the value cannot be parsed as a bool, error // We check 'true/false' and '1/0', else error func (b *DB) GetBool(path []string, key string) (bool, error) { var ret bool r, err := b.GetValue(path, key) if err == nil { if r == "true" || r == "1" { ret = true } else if r != "false" && r != "0" { err = fmt.Errorf("Cannot parse as a boolean") } } return ret, err } // SetBool Sets a boolean value func (b *DB) SetBool(path []string, key string, val bool) error { if val { return b.SetValue(path, key, "true") } return b.SetValue(path, key, "false") } // GetTimestamp returns the value at 'path' // If the value cannot be parsed as a RFC3339, error func (b *DB) GetTimestamp(path []string, key string) (time.Time, error) { r, err := b.GetValue(path, key) if err == nil { return time.Parse(time.RFC3339, r) } return time.Unix(0, 0), err } // SetTimestamp saves a timestamp into the db func (b *DB) SetTimestamp(path []string, key string, val time.Time) error { return b.SetValue(path, key, val.Format(time.RFC3339)) } // GetBucketList returns a list of all sub-buckets at path func (b *DB) GetBucketList(path []string) ([]string, error) { var err error var ret []string if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return ret, err } defer b.CloseDB() } err = b.boltDB.Update(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } var berr error if len(path) > 1 { for idx := 1; idx < len(path); idx++ { bkt = bkt.Bucket([]byte(path[idx])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], " / ")) } } } // bkt should have the last bucket in the path berr = bkt.ForEach(func(k, v []byte) error { if v == nil { // Must be a bucket ret = append(ret, string(k)) } return nil }) return berr }) return ret, err } // GetKeyList returns a list of all keys at path func (b *DB) GetKeyList(path []string) ([]string, error) { var err error var ret []string if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return ret, err } defer b.CloseDB() } err = b.boltDB.Update(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } var berr error if len(path) > 1 { for idx := 1; idx < len(path); idx++ { bkt = bkt.Bucket([]byte(path[idx])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], " / ")) } } } // bkt should have the last bucket in the path berr = bkt.ForEach(func(k, v []byte) error { if v != nil { // Must be a key ret = append(ret, string(k)) } return nil }) return berr }) return ret, err } // DeletePair deletes the pair with key at path func (b *DB) DeletePair(path []string, key string) error { var err error if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return err } defer b.CloseDB() } err = b.boltDB.Update(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } if len(path) > 1 { var newBkt *bolt.Bucket for idx := 1; idx < len(path); idx++ { newBkt = bkt.Bucket([]byte(path[idx])) if newBkt == nil { return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/")) } } bkt = newBkt } // bkt should have the last bucket in the path // Test to make sure that key is a pair, if so, delete it if tst := bkt.Bucket([]byte(key)); tst == nil { return bkt.Delete([]byte(key)) } return nil }) return err } // DeleteBucket deletes the bucket key at path func (b *DB) DeleteBucket(path []string, key string) error { var err error if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return err } defer b.CloseDB() } err = b.boltDB.Update(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } for idx := 1; idx < len(path); idx++ { bkt = bkt.Bucket([]byte(path[idx])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/")) } } // bkt should have the last bucket in the path // Test to make sure that key is a bucket, if so, delete it if tst := bkt.Bucket([]byte(key)); tst != nil { return bkt.DeleteBucket([]byte(key)) } return nil }) return err } // GetValueList returns a string slice of all values in the bucket at path func (b *DB) GetValueList(path []string) ([]string, error) { var err error var ret []string if !b.dbIsOpen { if err = b.OpenDB(); err != nil { return ret, err } defer b.CloseDB() } err = b.boltDB.Update(func(tx *bolt.Tx) error { bkt := tx.Bucket([]byte(path[0])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + path[0]) } var berr error if len(path) > 1 { for idx := 1; idx < len(path); idx++ { bkt = bkt.Bucket([]byte(path[idx])) if bkt == nil { return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], " / ")) } } } // bkt should have the last bucket in the path berr = bkt.ForEach(func(k, v []byte) error { if v != nil { // Must be a key ret = append(ret, string(v)) } return nil }) return berr }) return ret, err }