/
LegacyBatchingEntityLoaderBuilder.java
134 lines (123 loc) · 4.88 KB
/
LegacyBatchingEntityLoaderBuilder.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2012, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.loader.entity.plan;
import java.io.Serializable;
import java.util.List;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.util.collections.ArrayHelper;
import org.hibernate.loader.entity.UniqueEntityLoader;
import org.hibernate.persister.entity.OuterJoinLoadable;
/**
* LoadPlan-based implementation of the the legacy batch loading strategy
*
* @author Steve Ebersole
*/
public class LegacyBatchingEntityLoaderBuilder extends AbstractBatchingEntityLoaderBuilder {
public static final LegacyBatchingEntityLoaderBuilder INSTANCE = new LegacyBatchingEntityLoaderBuilder();
@Override
protected UniqueEntityLoader buildBatchingLoader(
OuterJoinLoadable persister,
int batchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
LoadQueryInfluencers influencers) {
return new LegacyBatchingEntityLoader( persister, batchSize, lockMode, factory, influencers );
}
@Override
protected UniqueEntityLoader buildBatchingLoader(
OuterJoinLoadable persister,
int batchSize,
LockOptions lockOptions,
SessionFactoryImplementor factory,
LoadQueryInfluencers influencers) {
return new LegacyBatchingEntityLoader( persister, batchSize, lockOptions, factory, influencers );
}
public static class LegacyBatchingEntityLoader extends BatchingEntityLoader {
private final int[] batchSizes;
private final EntityLoader[] loaders;
public LegacyBatchingEntityLoader(
OuterJoinLoadable persister,
int maxBatchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
LoadQueryInfluencers loadQueryInfluencers) {
super( persister );
this.batchSizes = ArrayHelper.getBatchSizes( maxBatchSize );
this.loaders = new EntityLoader[ batchSizes.length ];
final EntityLoader.Builder entityLoaderBuilder = EntityLoader.forEntity( persister )
.withInfluencers( loadQueryInfluencers )
.withLockMode( lockMode );
for ( int i = 0; i < batchSizes.length; i++ ) {
this.loaders[i] = entityLoaderBuilder.withBatchSize( batchSizes[i] ).byPrimaryKey();
}
}
public LegacyBatchingEntityLoader(
OuterJoinLoadable persister,
int maxBatchSize,
LockOptions lockOptions,
SessionFactoryImplementor factory,
LoadQueryInfluencers loadQueryInfluencers) {
super( persister );
this.batchSizes = ArrayHelper.getBatchSizes( maxBatchSize );
this.loaders = new EntityLoader[ batchSizes.length ];
final EntityLoader.Builder entityLoaderBuilder = EntityLoader.forEntity( persister )
.withInfluencers( loadQueryInfluencers )
.withLockOptions( lockOptions );
for ( int i = 0; i < batchSizes.length; i++ ) {
this.loaders[i] = entityLoaderBuilder.withBatchSize( batchSizes[i] ).byPrimaryKey();
}
}
@Override
public Object load(Serializable id, Object optionalObject, SessionImplementor session, LockOptions lockOptions) {
final Serializable[] batch = session.getPersistenceContext()
.getBatchFetchQueue()
.getEntityBatch( persister(), id, batchSizes[0], persister().getEntityMode() );
for ( int i = 0; i < batchSizes.length-1; i++) {
final int smallBatchSize = batchSizes[i];
if ( batch[smallBatchSize-1] != null ) {
Serializable[] smallBatch = new Serializable[smallBatchSize];
System.arraycopy(batch, 0, smallBatch, 0, smallBatchSize);
// for now...
final List results = loaders[i].loadEntityBatch(
session,
smallBatch,
persister().getIdentifierType(),
optionalObject,
persister().getEntityName(),
id,
persister(),
lockOptions
);
//EARLY EXIT
return getObjectFromList( results, id, session );
}
}
return ( loaders[batchSizes.length-1] ).load( id, optionalObject, session );
}
}
}