mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
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dce9c41094
* begin db interface * define the database interface * interface definition simplifications * include latest message proto * modify pbs * rem kv folder * add filter interface * lint * ctx package is great * interface getting better * ctx everywhere...it's everywhere! * block roots method * new kv store initialization * comments * gaz * implement interface * refactor for proper naming conventions * add todos * proper comments * rem unused
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
package kv
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import (
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"os"
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"path"
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"time"
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"github.com/boltdb/bolt"
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"github.com/pkg/errors"
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)
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// Store defines an implementation of the Prysm Database interface
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// using BoltDB as the underlying persistent kv-store for eth2.
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type Store struct {
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db *bolt.DB
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DatabasePath string
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}
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// NewKVStore initializes a new boltDB key-value store at the directory
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// path specified, creates the kv-buckets based on the schema, and stores
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// an open connection db object as a property of the Store struct.
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func NewKVStore(dirPath string) (*Store, error) {
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if err := os.MkdirAll(dirPath, 0700); err != nil {
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return nil, err
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}
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datafile := path.Join(dirPath, "beaconchain.db")
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boltDB, err := bolt.Open(datafile, 0600, &bolt.Options{Timeout: 1 * time.Second})
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if err != nil {
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if err == bolt.ErrTimeout {
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return nil, errors.New("cannot obtain database lock, database may be in use by another process")
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}
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return nil, err
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}
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kv := &Store{db: boltDB, DatabasePath: dirPath}
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if err := kv.db.Update(func(tx *bolt.Tx) error {
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// TODO(#3164): Update buckets.
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return nil
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}); err != nil {
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return nil, err
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}
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return kv, err
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}
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// ClearDB removes the previously stored directory at the data directory.
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func (k *Store) ClearDB() error {
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if _, err := os.Stat(k.DatabasePath); os.IsNotExist(err) {
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return nil
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}
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return os.RemoveAll(k.DatabasePath)
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}
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// Close closes the underlying BoltDB database.
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func (k *Store) Close() error {
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return k.db.Close()
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}
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