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HHH-9857 - Reuse of EntityEntry for bytecode enhanced read-only reference cached entities

This commit is contained in:
Steve Ebersole 2015-07-06 13:24:12 -05:00
parent 3a515b5d39
commit 750d6fb090
3 changed files with 19 additions and 51 deletions
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15
hibernate-core/src/main/java/org/hibernate/engine/internal/AbstractEntityEntry.java
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@ -6,6 +6,10 @@
*/
package org.hibernate.engine.internal;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import org.hibernate.AssertionFailure;
import org.hibernate.CustomEntityDirtinessStrategy;
import org.hibernate.EntityMode;
@ -26,15 +30,8 @@ import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.persister.entity.UniqueKeyLoadable;
import org.hibernate.pretty.MessageHelper;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
/**
* We need an entry to tell us all about the current state of an mutable object with respect to its persistent state
*
* Implementation Warning: Hibernate needs to instantiate a high amount of instances of this class,
* therefore we need to take care of its impact on memory consumption.
* A base implementation of EntityEntry
*
* @author Gavin King
* @author Emmanuel Bernard <emmanuel@hibernate.org>
@ -69,7 +66,7 @@ public abstract class AbstractEntityEntry implements Serializable, EntityEntry {
* 0000 0000 | 0000 0000 | 0654 3333 | 2222 1111
* </pre>
* Use {@link #setCompressedValue(org.hibernate.engine.internal.AbstractEntityEntry.EnumState, Enum)},
* {@link #getCompressedValue(org.hibernate.engine.internal.AbstractEntityEntry.EnumState, Class)} etc
* {@link #getCompressedValue(org.hibernate.engine.internal.AbstractEntityEntry.EnumState)} etc
* to access the enums and booleans stored in this value.
* <p>
* Representing enum values by their ordinal value is acceptable for our case as this value itself is never

42
hibernate-core/src/main/java/org/hibernate/engine/internal/ImmutableEntityEntry.java
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@ -6,6 +6,10 @@
*/
package org.hibernate.engine.internal;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import org.hibernate.EntityMode;
import org.hibernate.LockMode;
import org.hibernate.UnsupportedLockAttemptException;
@ -15,49 +19,19 @@ import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.Status;
import org.hibernate.persister.entity.EntityPersister;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
/**
* We need an entry to tell us all about the current state of an mutable object with respect to its persistent state
*
* Implementation Warning: Hibernate needs to instantiate a high amount of instances of this class,
* therefore we need to take care of its impact on memory consumption.
* An EntityEntry implementation for immutable entities. Note that this implementation is not completely
* immutable in terms of its internal state; the term immutable here refers to the entity is describes.
*
* @author Gavin King
* @author Emmanuel Bernard <emmanuel@hibernate.org>
* @author Gunnar Morling
* @author Sanne Grinovero <sanne@hibernate.org>
*
* @see org.hibernate.annotations.Immutable
*/
public final class ImmutableEntityEntry extends AbstractEntityEntry {
/**
* Holds several boolean and enum typed attributes in a very compact manner. Enum values are stored in 4 bits
* (where 0 represents {@code null}, and each enum value is represented by its ordinal value + 1), thus allowing
* for up to 15 values per enum. Boolean values are stored in one bit.
* <p>
* The value is structured as follows:
*
* <pre>
* 1 - Lock mode
* 2 - Status
* 3 - Previous Status
* 4 - existsInDatabase
* 5 - isBeingReplicated
* 6 - loadedWithLazyPropertiesUnfetched; NOTE: this is not updated when properties are fetched lazily!
*
* 0000 0000 | 0000 0000 | 0654 3333 | 2222 1111
* </pre>
* Use {@link #setCompressedValue(org.hibernate.engine.internal.ImmutableEntityEntry.EnumState, Enum)},
* {@link #getCompressedValue(org.hibernate.engine.internal.ImmutableEntityEntry.EnumState, Class)} etc
* to access the enums and booleans stored in this value.
* <p>
* Representing enum values by their ordinal value is acceptable for our case as this value itself is never
* serialized or deserialized and thus is not affected should ordinal values change.
*/
private transient int compressedState;
/**
* @deprecated the tenantId and entityMode parameters where removed: this constructor accepts but ignores them.
* Use the other constructor!

13
hibernate-core/src/main/java/org/hibernate/engine/internal/MutableEntityEntry.java
View File

@ -6,6 +6,10 @@
*/
package org.hibernate.engine.internal;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import org.hibernate.EntityMode;
import org.hibernate.LockMode;
import org.hibernate.engine.spi.EntityEntry;
@ -14,15 +18,8 @@ import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.Status;
import org.hibernate.persister.entity.EntityPersister;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
/**
* We need an entry to tell us all about the current state of an mutable object with respect to its persistent state
*
* Implementation Warning: Hibernate needs to instantiate a high amount of instances of this class,
* therefore we need to take care of its impact on memory consumption.
* An EntityEntry implementation for mutable entities.
*
* @author Gavin King
* @author Emmanuel Bernard <emmanuel@hibernate.org>