github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/batch.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package bitalosdb
    16  
    17  import (
    18  	"sync"
    19  
    20  	"github.com/zuoyebang/bitalosdb/internal/consts"
    21  )
    22  
    23  type Batch struct {
    24  	db       *DB
    25  	bitowers [consts.DefaultBitowerNum]*BatchBitower
    26  }
    27  
    28  var batchPool = sync.Pool{
    29  	New: func() interface{} {
    30  		return &Batch{}
    31  	},
    32  }
    33  
    34  func newBatch(db *DB) *Batch {
    35  	b := batchPool.Get().(*Batch)
    36  	b.db = db
    37  	for i := range b.bitowers {
    38  		b.bitowers[i] = nil
    39  		b.bitowers[i] = newBatchBitowerByIndex(db, i)
    40  	}
    41  	return b
    42  }
    43  
    44  func (b *Batch) getBatchBitower(key []byte) *BatchBitower {
    45  	index := b.db.getBitowerIndexByKey(key)
    46  	if b.bitowers[index] == nil {
    47  		b.bitowers[index] = newBatchBitowerByIndex(b.db, index)
    48  	}
    49  	return b.bitowers[index]
    50  }
    51  
    52  func (b *Batch) Set(key, value []byte, opts *WriteOptions) error {
    53  	return b.getBatchBitower(key).Set(key, value, opts)
    54  }
    55  
    56  func (b *Batch) SetMultiValue(key []byte, values ...[]byte) error {
    57  	return b.getBatchBitower(key).SetMultiValue(key, values...)
    58  }
    59  
    60  func (b *Batch) PrefixDeleteKeySet(key []byte, opts *WriteOptions) error {
    61  	return b.getBatchBitower(key).PrefixDeleteKeySet(key, opts)
    62  }
    63  
    64  func (b *Batch) Delete(key []byte, opts *WriteOptions) error {
    65  	return b.getBatchBitower(key).Delete(key, opts)
    66  }
    67  
    68  func (b *Batch) Commit(o *WriteOptions) error {
    69  	return b.db.Apply(b, o)
    70  }
    71  
    72  func (b *Batch) Close() error {
    73  	for i := range b.bitowers {
    74  		if b.bitowers[i] != nil {
    75  			b.bitowers[i].Close()
    76  			b.bitowers[i] = nil
    77  		}
    78  	}
    79  	b.db = nil
    80  	return nil
    81  }
    82  
    83  func (b *Batch) Reset() {
    84  	for i := range b.bitowers {
    85  		if b.bitowers[i] != nil {
    86  			b.bitowers[i].Reset()
    87  		}
    88  	}
    89  }
    90  
    91  func (b *Batch) Empty() bool {
    92  	for i := range b.bitowers {
    93  		if b.bitowers[i] != nil && !b.bitowers[i].Empty() {
    94  			return false
    95  		}
    96  	}
    97  	return true
    98  }
    99  
   100  func (b *Batch) Count() uint32 {
   101  	var count uint32
   102  	for i := range b.bitowers {
   103  		if b.bitowers[i] != nil {
   104  			count += b.bitowers[i].Count()
   105  		}
   106  	}
   107  	return count
   108  }