github.com/codingfuture/orig-energi3@v0.8.4/ethdb/table_batch.go (about)

     1  // Copyright 2018 The Energi Core Authors
     2  // Copyright 2018 The go-ethereum Authors
     3  // This file is part of the Energi Core library.
     4  //
     5  // The Energi Core library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The Energi Core library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the Energi Core library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package ethdb
    19  
    20  type tableBatch struct {
    21  	batch  Batch
    22  	prefix string
    23  }
    24  
    25  // NewTableBatch returns a Batch object which prefixes all keys with a given string.
    26  func NewTableBatch(db Database, prefix string) Batch {
    27  	return &tableBatch{db.NewBatch(), prefix}
    28  }
    29  
    30  func (dt *table) NewBatch() Batch {
    31  	return &tableBatch{dt.db.NewBatch(), dt.prefix}
    32  }
    33  
    34  func (tb *tableBatch) Put(key, value []byte) error {
    35  	return tb.batch.Put(append([]byte(tb.prefix), key...), value)
    36  }
    37  
    38  func (tb *tableBatch) Delete(key []byte) error {
    39  	return tb.batch.Delete(append([]byte(tb.prefix), key...))
    40  }
    41  
    42  func (tb *tableBatch) Write() error {
    43  	return tb.batch.Write()
    44  }
    45  
    46  func (tb *tableBatch) ValueSize() int {
    47  	return tb.batch.ValueSize()
    48  }
    49  
    50  func (tb *tableBatch) Reset() {
    51  	tb.batch.Reset()
    52  }