diff options
Diffstat (limited to 'vendor/github.com/dexon-foundation/dexon-consensus-core/core/blockdb/level-db.go')
-rw-r--r-- | vendor/github.com/dexon-foundation/dexon-consensus-core/core/blockdb/level-db.go | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus-core/core/blockdb/level-db.go b/vendor/github.com/dexon-foundation/dexon-consensus-core/core/blockdb/level-db.go deleted file mode 100644 index 76730fc9c..000000000 --- a/vendor/github.com/dexon-foundation/dexon-consensus-core/core/blockdb/level-db.go +++ /dev/null @@ -1,127 +0,0 @@ -// Copyright 2018 The dexon-consensus Authors -// This file is part of the dexon-consensus library. -// -// The dexon-consensus library is free software: you can redistribute it -// and/or modify it under the terms of the GNU Lesser General Public License as -// published by the Free Software Foundation, either version 3 of the License, -// or (at your option) any later version. -// -// The dexon-consensus library is distributed in the hope that it will be -// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser -// General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the dexon-consensus library. If not, see -// <http://www.gnu.org/licenses/>. - -package blockdb - -import ( - "encoding/json" - - "github.com/syndtr/goleveldb/leveldb" - - "github.com/dexon-foundation/dexon-consensus/common" - "github.com/dexon-foundation/dexon-consensus/core/types" -) - -// LevelDBBackedBlockDB is a leveldb backed BlockDB implementation. -type LevelDBBackedBlockDB struct { - db *leveldb.DB -} - -// NewLevelDBBackedBlockDB initialize a leveldb-backed block database. -func NewLevelDBBackedBlockDB( - path string) (lvl *LevelDBBackedBlockDB, err error) { - - db, err := leveldb.OpenFile(path, nil) - if err != nil { - return - } - lvl = &LevelDBBackedBlockDB{db: db} - return -} - -// Close implement Closer interface, which would release allocated resource. -func (lvl *LevelDBBackedBlockDB) Close() error { - return lvl.db.Close() -} - -// Has implements the Reader.Has method. -func (lvl *LevelDBBackedBlockDB) Has(hash common.Hash) bool { - exists, err := lvl.db.Has([]byte(hash[:]), nil) - if err != nil { - // TODO(missionliao): Modify the interface to return error. - panic(err) - } - return exists -} - -// Get implements the Reader.Get method. -func (lvl *LevelDBBackedBlockDB) Get( - hash common.Hash) (block types.Block, err error) { - - queried, err := lvl.db.Get([]byte(hash[:]), nil) - if err != nil { - if err == leveldb.ErrNotFound { - err = ErrBlockDoesNotExist - } - return - } - err = json.Unmarshal(queried, &block) - if err != nil { - return - } - return -} - -// Update implements the Writer.Update method. -func (lvl *LevelDBBackedBlockDB) Update(block types.Block) (err error) { - // NOTE: we didn't handle changes of block hash (and it - // should not happen). - marshaled, err := json.Marshal(&block) - if err != nil { - return - } - - if !lvl.Has(block.Hash) { - err = ErrBlockDoesNotExist - return - } - err = lvl.db.Put( - []byte(block.Hash[:]), - marshaled, - nil) - if err != nil { - return - } - return -} - -// Put implements the Writer.Put method. -func (lvl *LevelDBBackedBlockDB) Put(block types.Block) (err error) { - marshaled, err := json.Marshal(&block) - if err != nil { - return - } - if lvl.Has(block.Hash) { - err = ErrBlockExists - return - } - err = lvl.db.Put( - []byte(block.Hash[:]), - marshaled, - nil) - if err != nil { - return - } - return -} - -// GetAll implements Reader.GetAll method, which allows callers -// to retrieve all blocks in DB. -func (lvl *LevelDBBackedBlockDB) GetAll() (BlockIterator, error) { - // TODO (mission): Implement this part via goleveldb's iterator. - return nil, ErrNotImplemented -} |