Hibernate
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hibernate-orm
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trim array holding batch of ids before passing to JDBC 

before this, the array length was the batch size, and
was padded with nulls, which isn't great if you have
a large batch size, I suppose
This commit is contained in:
Gavin 2023-05-21 10:02:31 +02:00 committed by Gavin King
parent f2017cd5a0
commit 2926d1781d
3 changed files with 44 additions and 28 deletions
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11
hibernate-core/src/main/java/org/hibernate/engine/spi/BatchFetchQueue.java
View File

@ -370,15 +370,16 @@ public class BatchFetchQueue {
return;
}
int i = 1;
int end = -1;
boolean checkForEnd = false;
final LinkedHashMap<CollectionEntry, PersistentCollection<?>> map = batchLoadableCollections.get( pluralAttributeMapping.getNavigableRole().getFullPath() );
final LinkedHashMap<CollectionEntry, PersistentCollection<?>> map =
batchLoadableCollections.get( pluralAttributeMapping.getNavigableRole().getFullPath() );
if ( map == null ) {
return;
}
int i = 1;
int end = -1;
boolean checkForEnd = false;
for ( Entry<CollectionEntry, PersistentCollection<?>> me : map.entrySet() ) {
final CollectionEntry ce = me.getKey();
final PersistentCollection<?> collection = me.getValue();

30
hibernate-core/src/main/java/org/hibernate/loader/ast/internal/CollectionBatchLoaderArrayParam.java
View File

@ -7,6 +7,7 @@
package org.hibernate.loader.ast.internal;
import java.lang.reflect.Array;
import java.util.Arrays;
import org.hibernate.LockOptions;
import org.hibernate.collection.spi.PersistentCollection;
@ -45,7 +46,6 @@ import static org.hibernate.loader.ast.internal.MultiKeyLoadLogging.MULTI_KEY_LO
public class CollectionBatchLoaderArrayParam
extends AbstractCollectionBatchLoader
implements CollectionBatchLoader, SqlArrayMultiKeyLoader {
private final Class<?> arrayElementType;
private final JdbcMapping arrayJdbcMapping;
private final JdbcParameter jdbcParameter;
private final SelectStatement sqlSelect;
@ -67,10 +67,10 @@ public class CollectionBatchLoaderArrayParam
);
}
final SimpleForeignKeyDescriptor keyDescriptor = (SimpleForeignKeyDescriptor) getLoadable().getKeyDescriptor();
final SimpleForeignKeyDescriptor keyDescriptor = getKeyDescriptor();
arrayElementType = keyDescriptor.getJavaType().getJavaTypeClass();
final Class<?> arrayClass = Array.newInstance( arrayElementType, 0 ).getClass();
final Class<?> keyType = keyDescriptor.getJavaType().getJavaTypeClass();
final Class<?> arrayClass = Array.newInstance( keyType, 0 ).getClass();
final BasicType<?> arrayBasicType = getSessionFactory().getTypeConfiguration()
.getBasicTypeRegistry()
@ -101,6 +101,10 @@ public class CollectionBatchLoaderArrayParam
singleKeyLoader = new CollectionLoaderSingleKey( attributeMapping, loadQueryInfluencers, sessionFactory );
}
private SimpleForeignKeyDescriptor getKeyDescriptor() {
return (SimpleForeignKeyDescriptor) getLoadable().getKeyDescriptor();
}
@Override
public PersistentCollection<?> load(Object key, SharedSessionContractImplementor session) {
if ( MULTI_KEY_LOAD_DEBUG_ENABLED ) {
@ -120,14 +124,21 @@ public class CollectionBatchLoaderArrayParam
}
private Object[] resolveKeysToInitialize(Object keyBeingLoaded, SharedSessionContractImplementor session) {
final Object[] keysToInitialize = (Object[]) Array.newInstance( arrayElementType, getDomainBatchSize() );
session.getPersistenceContextInternal().getBatchFetchQueue().collectBatchLoadableCollectionKeys(
getDomainBatchSize(),
final int length = getDomainBatchSize();
final Class<?> keyType = getKeyDescriptor().getJavaType().getJavaTypeClass();
final Object[] keysToInitialize = (Object[]) Array.newInstance( keyType, length );
session.getPersistenceContextInternal().getBatchFetchQueue()
.collectBatchLoadableCollectionKeys(
length,
(index, value) -> keysToInitialize[index] = value,
keyBeingLoaded,
getLoadable()
);
return keysToInitialize;
int newLength = length;
while ( newLength>1 && keysToInitialize[newLength-1] == null ) {
newLength--;
}
return newLength < length ? Arrays.copyOf( keysToInitialize, newLength ) : keysToInitialize;
}
private void initializeKeys(Object[] keysToInitialize, SharedSessionContractImplementor session) {
@ -162,7 +173,4 @@ public class CollectionBatchLoaderArrayParam
finishInitializingKey( keysToInitialize[i], session );
}
}
public void prepare() {
}
}

13
hibernate-core/src/main/java/org/hibernate/loader/ast/internal/EntityBatchLoaderArrayParam.java
View File

@ -7,6 +7,7 @@
package org.hibernate.loader.ast.internal;
import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Locale;
import org.hibernate.LockOptions;
@ -137,14 +138,20 @@ public class EntityBatchLoaderArrayParam<T>
}
protected Object[] resolveIdsToInitialize(Object pkValue, SharedSessionContractImplementor session) {
final Object[] idsToLoad = (Object[]) Array.newInstance( identifierMapping.getJavaType().getJavaTypeClass(), domainBatchSize );
session.getPersistenceContextInternal().getBatchFetchQueue().collectBatchLoadableEntityIds(
final Class<?> idType = identifierMapping.getJavaType().getJavaTypeClass();
final Object[] idsToLoad = (Object[]) Array.newInstance( idType, domainBatchSize );
session.getPersistenceContextInternal().getBatchFetchQueue()
.collectBatchLoadableEntityIds(
domainBatchSize,
(index, value) -> idsToLoad[index] = value,
pkValue,
getLoadable()
);
return idsToLoad;
int newLength = domainBatchSize;
while ( newLength>1 && idsToLoad[newLength-1] == null ) {
newLength--;
}
return newLength < domainBatchSize ? Arrays.copyOf( idsToLoad, newLength ) : idsToLoad;
}
private void initializeEntities(