github.com/oskarth/go-ethereum@v1.6.8-0.20191013093314-dac24a9d3494/ethdb/table_batch.go (about)

     1  // Copyright 2014 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package ethdb
    18  
    19  type tableBatch struct {
    20  	batch  Batch
    21  	prefix string
    22  }
    23  
    24  // NewTableBatch returns a Batch object which prefixes all keys with a given string.
    25  func NewTableBatch(db Database, prefix string) Batch {
    26  	return &tableBatch{db.NewBatch(), prefix}
    27  }
    28  
    29  func (dt *table) NewBatch() Batch {
    30  	return &tableBatch{dt.db.NewBatch(), dt.prefix}
    31  }
    32  
    33  func (tb *tableBatch) Put(key, value []byte) error {
    34  	return tb.batch.Put(append([]byte(tb.prefix), key...), value)
    35  }
    36  
    37  func (tb *tableBatch) Delete(key []byte) error {
    38  	return tb.batch.Delete(append([]byte(tb.prefix), key...))
    39  }
    40  
    41  func (tb *tableBatch) Write() error {
    42  	return tb.batch.Write()
    43  }
    44  
    45  func (tb *tableBatch) ValueSize() int {
    46  	return tb.batch.ValueSize()
    47  }
    48  
    49  func (tb *tableBatch) Reset() {
    50  	tb.batch.Reset()
    51  }