/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.engine.spi;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;
import org.hibernate.AssertionFailure;
import org.hibernate.HibernateException;
import org.hibernate.PropertyValueException;
import org.hibernate.action.internal.AbstractEntityInsertAction;
import org.hibernate.action.internal.BulkOperationCleanupAction;
import org.hibernate.action.internal.CollectionRecreateAction;
import org.hibernate.action.internal.CollectionRemoveAction;
import org.hibernate.action.internal.CollectionUpdateAction;
import org.hibernate.action.internal.EntityDeleteAction;
import org.hibernate.action.internal.EntityIdentityInsertAction;
import org.hibernate.action.internal.EntityInsertAction;
import org.hibernate.action.internal.EntityUpdateAction;
import org.hibernate.action.internal.OrphanRemovalAction;
import org.hibernate.action.internal.QueuedOperationCollectionAction;
import org.hibernate.action.internal.UnresolvedEntityInsertActions;
import org.hibernate.action.spi.AfterTransactionCompletionProcess;
import org.hibernate.action.spi.BeforeTransactionCompletionProcess;
import org.hibernate.action.spi.Executable;
import org.hibernate.cache.CacheException;
import org.hibernate.engine.internal.NonNullableTransientDependencies;
import org.hibernate.internal.CoreLogging;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.metadata.ClassMetadata;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.proxy.LazyInitializer;
import org.hibernate.type.CollectionType;
import org.hibernate.type.EntityType;
import org.hibernate.type.ForeignKeyDirection;
import org.hibernate.type.OneToOneType;
import org.hibernate.type.Type;
/**
* Responsible for maintaining the queue of actions related to events.
*
* The ActionQueue holds the DML operations queued as part of a session's transactional-write-behind semantics. The
* DML operations are queued here until a flush forces them to be executed against the database.
*
* @author Steve Ebersole
* @author Gail Badner
* @author Anton Marsden
*/
public class ActionQueue {
private static final CoreMessageLogger LOG = CoreLogging.messageLogger( ActionQueue.class );
private SessionImplementor session;
private UnresolvedEntityInsertActions unresolvedInsertions;
// NOTE: ExecutableList fields must be instantiated via ListProvider#init or #getOrInit
// to ensure that they are instantiated consistently.
// Object insertions, updates, and deletions have list semantics because
// they must happen in the right order so as to respect referential
// integrity
private ExecutableList<AbstractEntityInsertAction> insertions;
private ExecutableList<EntityDeleteAction> deletions;
private ExecutableList<EntityUpdateAction> updates;
// Actually the semantics of the next three are really "Bag"
// Note that, unlike objects, collection insertions, updates,
// deletions are not really remembered between flushes. We
// just re-use the same Lists for convenience.
private ExecutableList<CollectionRecreateAction> collectionCreations;
private ExecutableList<CollectionUpdateAction> collectionUpdates;
private ExecutableList<QueuedOperationCollectionAction> collectionQueuedOps;
private ExecutableList<CollectionRemoveAction> collectionRemovals;
// TODO: The removeOrphan concept is a temporary "hack" for HHH-6484. This should be removed once action/task
// ordering is improved.
private ExecutableList<OrphanRemovalAction> orphanRemovals;
private transient boolean isTransactionCoordinatorShared;
private AfterTransactionCompletionProcessQueue afterTransactionProcesses;
private BeforeTransactionCompletionProcessQueue beforeTransactionProcesses;
/**
* An LinkedHashMap containing providers for all the ExecutableLists, inserted in execution order
*/
private static final LinkedHashMap<Class<? extends Executable>,ListProvider> EXECUTABLE_LISTS_MAP;
static {
EXECUTABLE_LISTS_MAP = new LinkedHashMap<Class<? extends Executable>,ListProvider>( 8 );
EXECUTABLE_LISTS_MAP.put(
OrphanRemovalAction.class,
new ListProvider<OrphanRemovalAction>() {
ExecutableList<OrphanRemovalAction> get(ActionQueue instance) {
return instance.orphanRemovals;
}
ExecutableList<OrphanRemovalAction> init(ActionQueue instance) {
// OrphanRemovalAction executables never require sorting.
return instance.orphanRemovals = new ExecutableList<OrphanRemovalAction>( false );
}
}
);
EXECUTABLE_LISTS_MAP.put(
AbstractEntityInsertAction.class,
new ListProvider<AbstractEntityInsertAction>() {
ExecutableList<AbstractEntityInsertAction> get(ActionQueue instance) {
return instance.insertions;
}
ExecutableList<AbstractEntityInsertAction> init(ActionQueue instance) {
if ( instance.isOrderInsertsEnabled() ) {
return instance.insertions = new ExecutableList<AbstractEntityInsertAction>(
new InsertActionSorter()
);
}
else {
return instance.insertions = new ExecutableList<AbstractEntityInsertAction>(
false
);
}
}
}
);
EXECUTABLE_LISTS_MAP.put(
EntityUpdateAction.class,
new ListProvider<EntityUpdateAction>() {
ExecutableList<EntityUpdateAction> get(ActionQueue instance) {
return instance.updates;
}
ExecutableList<EntityUpdateAction> init(ActionQueue instance) {
return instance.updates = new ExecutableList<EntityUpdateAction>(
instance.isOrderUpdatesEnabled()
);
}
}
);
EXECUTABLE_LISTS_MAP.put(
QueuedOperationCollectionAction.class,
new ListProvider<QueuedOperationCollectionAction>() {
ExecutableList<QueuedOperationCollectionAction> get(ActionQueue instance) {
return instance.collectionQueuedOps;
}
ExecutableList<QueuedOperationCollectionAction> init(ActionQueue instance) {
return instance.collectionQueuedOps = new ExecutableList<QueuedOperationCollectionAction>(
instance.isOrderUpdatesEnabled()
);
}
}
);
EXECUTABLE_LISTS_MAP.put(
CollectionRemoveAction.class,
new ListProvider<CollectionRemoveAction>() {
ExecutableList<CollectionRemoveAction> get(ActionQueue instance) {
return instance.collectionRemovals;
}
ExecutableList<CollectionRemoveAction> init(ActionQueue instance) {
return instance.collectionRemovals = new ExecutableList<CollectionRemoveAction>(
instance.isOrderUpdatesEnabled()
);
}
}
);
EXECUTABLE_LISTS_MAP.put(
CollectionUpdateAction.class,
new ListProvider<CollectionUpdateAction>() {
ExecutableList<CollectionUpdateAction> get(ActionQueue instance) {
return instance.collectionUpdates;
}
ExecutableList<CollectionUpdateAction> init(ActionQueue instance) {
return instance.collectionUpdates = new ExecutableList<CollectionUpdateAction>(
instance.isOrderUpdatesEnabled()
);
}
}
);
EXECUTABLE_LISTS_MAP.put(
CollectionRecreateAction.class,
new ListProvider<CollectionRecreateAction>() {
ExecutableList<CollectionRecreateAction> get(ActionQueue instance) {
return instance.collectionCreations;
}
ExecutableList<CollectionRecreateAction> init(ActionQueue instance) {
return instance.collectionCreations = new ExecutableList<CollectionRecreateAction>(
instance.isOrderUpdatesEnabled()
);
}
}
);
EXECUTABLE_LISTS_MAP.put(
EntityDeleteAction.class,
new ListProvider<EntityDeleteAction>() {
ExecutableList<EntityDeleteAction> get(ActionQueue instance) {
return instance.deletions;
}
ExecutableList<EntityDeleteAction> init(ActionQueue instance) {
// EntityDeleteAction executables never require sorting.
return instance.deletions = new ExecutableList<EntityDeleteAction>( false );
}
}
);
}
/**
* Constructs an action queue bound to the given session.
*
* @param session The session "owning" this queue.
*/
public ActionQueue(SessionImplementor session) {
this.session = session;
isTransactionCoordinatorShared = false;
}
public void clear() {
for ( ListProvider listProvider : EXECUTABLE_LISTS_MAP.values() ) {
ExecutableList<?> l = listProvider.get( this );
if( l != null ) {
l.clear();
}
}
if( unresolvedInsertions != null ) {
unresolvedInsertions.clear();
}
}
/**
* Adds an entity insert action
*
* @param action The action representing the entity insertion
*/
public void addAction(EntityInsertAction action) {
LOG.tracev( "Adding an EntityInsertAction for [{0}] object", action.getEntityName() );
addInsertAction( action );
}
private void addInsertAction(AbstractEntityInsertAction insert) {
if ( insert.isEarlyInsert() ) {
// For early inserts, must execute inserts before finding non-nullable transient entities.
// TODO: find out why this is necessary
LOG.tracev( "Executing inserts before finding non-nullable transient entities for early insert: [{0}]", insert );
executeInserts();
}
NonNullableTransientDependencies nonNullableTransientDependencies = insert.findNonNullableTransientEntities();
if ( nonNullableTransientDependencies == null ) {
LOG.tracev( "Adding insert with no non-nullable, transient entities: [{0}]", insert );
addResolvedEntityInsertAction( insert );
}
else {
if ( LOG.isTraceEnabled() ) {
LOG.tracev( "Adding insert with non-nullable, transient entities; insert=[{0}], dependencies=[{1}]", insert,
nonNullableTransientDependencies.toLoggableString( insert.getSession() ) );
}
if( unresolvedInsertions == null ) {
unresolvedInsertions = new UnresolvedEntityInsertActions();
}
unresolvedInsertions.addUnresolvedEntityInsertAction( insert, nonNullableTransientDependencies );
}
}
private void addResolvedEntityInsertAction(AbstractEntityInsertAction insert) {
if ( insert.isEarlyInsert() ) {
LOG.trace( "Executing insertions before resolved early-insert" );
executeInserts();
LOG.debug( "Executing identity-insert immediately" );
execute( insert );
}
else {
LOG.trace( "Adding resolved non-early insert action." );
addAction( AbstractEntityInsertAction.class, insert );
}
insert.makeEntityManaged();
if( unresolvedInsertions != null ) {
for (AbstractEntityInsertAction resolvedAction : unresolvedInsertions.resolveDependentActions(insert.getInstance(), session)) {
addResolvedEntityInsertAction(resolvedAction);
}
}
}
@SuppressWarnings("unchecked")
private <T extends Executable & Comparable & Serializable> void addAction(Class<T> executableClass, T action) {
EXECUTABLE_LISTS_MAP.get( executableClass ).getOrInit( this ).add( action );
}
/**
* Adds an entity (IDENTITY) insert action
*
* @param action The action representing the entity insertion
*/
public void addAction(EntityIdentityInsertAction action) {
LOG.tracev( "Adding an EntityIdentityInsertAction for [{0}] object", action.getEntityName() );
addInsertAction( action );
}
/**
* Adds an entity delete action
*
* @param action The action representing the entity deletion
*/
public void addAction(EntityDeleteAction action) {
addAction( EntityDeleteAction.class, action );
}
/**
* Adds an orphan removal action
*
* @param action The action representing the orphan removal
*/
public void addAction(OrphanRemovalAction action) {
addAction( OrphanRemovalAction.class, action );
}
/**
* Adds an entity update action
*
* @param action The action representing the entity update
*/
public void addAction(EntityUpdateAction action) {
addAction( EntityUpdateAction.class, action );
}
/**
* Adds a collection (re)create action
*
* @param action The action representing the (re)creation of a collection
*/
public void addAction(CollectionRecreateAction action) {
addAction( CollectionRecreateAction.class, action );
}
/**
* Adds a collection remove action
*
* @param action The action representing the removal of a collection
*/
public void addAction(CollectionRemoveAction action) {
addAction( CollectionRemoveAction.class, action );
}
/**
* Adds a collection update action
*
* @param action The action representing the update of a collection
*/
public void addAction(CollectionUpdateAction action) {
addAction( CollectionUpdateAction.class, action );
}
/**
* Adds an action relating to a collection queued operation (extra lazy).
*
* @param action The action representing the queued operation
*/
public void addAction(QueuedOperationCollectionAction action) {
addAction( QueuedOperationCollectionAction.class, action );
}
/**
* Adds an action defining a cleanup relating to a bulk operation (HQL/JPQL or Criteria based update/delete)
*
* @param action The action representing the queued operation
*/
public void addAction(BulkOperationCleanupAction action) {
registerCleanupActions( action );
}
private void registerCleanupActions(Executable executable) {
if( executable.getBeforeTransactionCompletionProcess() != null ) {
if( beforeTransactionProcesses == null ) {
beforeTransactionProcesses = new BeforeTransactionCompletionProcessQueue( session );
}
beforeTransactionProcesses.register(executable.getBeforeTransactionCompletionProcess());
}
if ( session.getFactory().getSessionFactoryOptions().isQueryCacheEnabled() ) {
invalidateSpaces( executable.getPropertySpaces() );
}
if( executable.getAfterTransactionCompletionProcess() != null ) {
if( afterTransactionProcesses == null ) {
afterTransactionProcesses = new AfterTransactionCompletionProcessQueue( session );
}
afterTransactionProcesses.register(executable.getAfterTransactionCompletionProcess());
}
}
/**
* Are there unresolved entity insert actions that depend on non-nullable associations with a transient entity?
*
* @return true, if there are unresolved entity insert actions that depend on non-nullable associations with a
* transient entity; false, otherwise
*/
public boolean hasUnresolvedEntityInsertActions() {
return unresolvedInsertions != null && !unresolvedInsertions.isEmpty();
}
/**
* Throws {@link org.hibernate.PropertyValueException} if there are any unresolved entity insert actions that depend
* on non-nullable associations with a transient entity. This method should be called on completion of an operation
* (after all cascades are completed) that saves an entity.
*
* @throws org.hibernate.PropertyValueException if there are any unresolved entity insert actions;
* {@link org.hibernate.PropertyValueException#getEntityName()} and
* {@link org.hibernate.PropertyValueException#getPropertyName()} will return the entity name and property value for
* the first unresolved entity insert action.
*/
public void checkNoUnresolvedActionsAfterOperation() throws PropertyValueException {
if(unresolvedInsertions != null) {
unresolvedInsertions.checkNoUnresolvedActionsAfterOperation();
}
}
public void registerProcess(AfterTransactionCompletionProcess process) {
if( afterTransactionProcesses == null ) {
afterTransactionProcesses = new AfterTransactionCompletionProcessQueue( session );
}
afterTransactionProcesses.register( process );
}
public void registerProcess(BeforeTransactionCompletionProcess process) {
if( beforeTransactionProcesses == null ) {
beforeTransactionProcesses = new BeforeTransactionCompletionProcessQueue( session );
}
beforeTransactionProcesses.register( process );
}
/**
* Perform all currently queued entity-insertion actions.
*
* @throws HibernateException error executing queued insertion actions.
*/
public void executeInserts() throws HibernateException {
if ( insertions != null && !insertions.isEmpty() ) {
executeActions( insertions );
}
}
/**
* Perform all currently queued actions.
*
* @throws HibernateException error executing queued actions.
*/
public void executeActions() throws HibernateException {
if ( hasUnresolvedEntityInsertActions() ) {
throw new IllegalStateException( "About to execute actions, but there are unresolved entity insert actions." );
}
for ( ListProvider listProvider : EXECUTABLE_LISTS_MAP.values() ) {
ExecutableList<?> l = listProvider.get( this );
if ( l != null && !l.isEmpty() ) {
executeActions( l );
}
}
}
/**
* Prepares the internal action queues for execution.
*
* @throws HibernateException error preparing actions.
*/
public void prepareActions() throws HibernateException {
prepareActions( collectionRemovals );
prepareActions( collectionUpdates );
prepareActions( collectionCreations );
prepareActions( collectionQueuedOps );
}
private void prepareActions(ExecutableList<?> queue) throws HibernateException {
if( queue == null ) {
return;
}
for ( Executable executable : queue ) {
executable.beforeExecutions();
}
}
/**
* Performs cleanup of any held cache softlocks.
*
* @param success Was the transaction successful.
*/
public void afterTransactionCompletion(boolean success) {
if ( !isTransactionCoordinatorShared ) {
// Execute completion actions only in transaction owner (aka parent session).
if( afterTransactionProcesses != null ) {
afterTransactionProcesses.afterTransactionCompletion(success);
}
}
}
/**
* Execute any registered {@link org.hibernate.action.spi.BeforeTransactionCompletionProcess}
*/
public void beforeTransactionCompletion() {
if ( !isTransactionCoordinatorShared ) {
// Execute completion actions only in transaction owner (aka parent session).
if( beforeTransactionProcesses != null ) {
beforeTransactionProcesses.beforeTransactionCompletion();
}
}
}
/**
* Check whether any insertion or deletion actions are currently queued.
*
* @return {@code true} if insertions or deletions are currently queued; {@code false} otherwise.
*/
public boolean areInsertionsOrDeletionsQueued() {
return ( insertions != null && !insertions.isEmpty() ) || hasUnresolvedEntityInsertActions() || (deletions != null && !deletions.isEmpty()) || (orphanRemovals != null && !orphanRemovals.isEmpty());
}
/**
* Check whether the given tables/query-spaces are to be executed against given the currently queued actions.
*
* @param tables The table/query-spaces to check.
*
* @return {@code true} if we contain pending actions against any of the given tables; {@code false} otherwise.
*/
public boolean areTablesToBeUpdated(@SuppressWarnings("rawtypes") Set tables) {
if ( tables.isEmpty() ) {
return false;
}
for ( ListProvider listProvider : EXECUTABLE_LISTS_MAP.values() ) {
ExecutableList<?> l = listProvider.get( this );
if ( areTablesToBeUpdated( l, tables ) ) {
return true;
}
}
if(unresolvedInsertions == null) {
return false;
}
return areTablesToBeUpdated( unresolvedInsertions, tables );
}
private static boolean areTablesToBeUpdated(ExecutableList<?> actions, @SuppressWarnings("rawtypes") Set tableSpaces) {
if ( actions == null || actions.isEmpty() ) {
return false;
}
for ( Serializable actionSpace : actions.getQuerySpaces() ) {
if ( tableSpaces.contains( actionSpace ) ) {
LOG.debugf( "Changes must be flushed to space: %s", actionSpace );
return true;
}
}
return false;
}
private static boolean areTablesToBeUpdated(UnresolvedEntityInsertActions actions, @SuppressWarnings("rawtypes") Set tableSpaces) {
for ( Executable action : actions.getDependentEntityInsertActions() ) {
final Serializable[] spaces = action.getPropertySpaces();
for ( Serializable space : spaces ) {
if ( tableSpaces.contains( space ) ) {
LOG.debugf( "Changes must be flushed to space: %s", space );
return true;
}
}
}
return false;
}
/**
* Perform {@link org.hibernate.action.spi.Executable#execute()} on each element of the list
*
* @param list The list of Executable elements to be performed
*
* @throws HibernateException
*/
private <E extends Executable & Comparable<?> & Serializable> void executeActions(ExecutableList<E> list) throws HibernateException {
// todo : consider ways to improve the double iteration of Executables here:
// 1) we explicitly iterate list here to perform Executable#execute()
// 2) ExecutableList#getQuerySpaces also iterates the Executables to collect query spaces.
try {
for ( E e : list ) {
try {
e.execute();
}
finally {
if( e.getBeforeTransactionCompletionProcess() != null ) {
if( beforeTransactionProcesses == null ) {
beforeTransactionProcesses = new BeforeTransactionCompletionProcessQueue( session );
}
beforeTransactionProcesses.register(e.getBeforeTransactionCompletionProcess());
}
if( e.getAfterTransactionCompletionProcess() != null ) {
if( afterTransactionProcesses == null ) {
afterTransactionProcesses = new AfterTransactionCompletionProcessQueue( session );
}
afterTransactionProcesses.register(e.getAfterTransactionCompletionProcess());
}
}
}
}
finally {
if ( session.getFactory().getSessionFactoryOptions().isQueryCacheEnabled() ) {
// Strictly speaking, only a subset of the list may have been processed if a RuntimeException occurs.
// We still invalidate all spaces. I don't see this as a big deal - after all, RuntimeExceptions are
// unexpected.
Set<Serializable> propertySpaces = list.getQuerySpaces();
invalidateSpaces( propertySpaces.toArray( new Serializable[propertySpaces.size()] ) );
}
}
list.clear();
session.getJdbcCoordinator().executeBatch();
}
/**
* @param executable The action to execute
*/
public <E extends Executable & Comparable<?>> void execute(E executable) {
try {
executable.execute();
}
finally {
registerCleanupActions( executable );
}
}
/**
* This method is now called once per execution of an ExecutableList or once for execution of an Execution.
*
* @param spaces The spaces to invalidate
*/
private void invalidateSpaces(Serializable... spaces) {
if ( spaces != null && spaces.length > 0 ) {
for ( Serializable s : spaces ) {
if( afterTransactionProcesses == null ) {
afterTransactionProcesses = new AfterTransactionCompletionProcessQueue( session );
}
afterTransactionProcesses.addSpaceToInvalidate( (String) s );
}
// Performance win: If we are processing an ExecutableList, this will only be called once
session.getFactory().getUpdateTimestampsCache().preInvalidate( spaces, session );
}
}
/**
* Returns a string representation of the object.
*
* @return a string representation of the object.
*/
@Override
public String toString() {
return "ActionQueue[insertions=" + toString(insertions)
+ " updates=" + toString(updates)
+ " deletions=" + toString(deletions)
+ " orphanRemovals=" + toString(orphanRemovals)
+ " collectionCreations=" + toString(collectionCreations)
+ " collectionRemovals=" + toString(collectionRemovals)
+ " collectionUpdates=" + toString(collectionUpdates)
+ " collectionQueuedOps=" + toString(collectionQueuedOps)
+ " unresolvedInsertDependencies=" + unresolvedInsertions
+ "]";
}
private static String toString(ExecutableList q) {
return q == null ? "ExecutableList{size=0}" : q.toString();
}
public int numberOfCollectionRemovals() {
if( collectionRemovals == null ) {
return 0;
}
return collectionRemovals.size();
}
public int numberOfCollectionUpdates() {
if( collectionUpdates == null ) {
return 0;
}
return collectionUpdates.size();
}
public int numberOfCollectionCreations() {
if( collectionCreations == null ) {
return 0;
}
return collectionCreations.size();
}
public int numberOfDeletions() {
int del = deletions == null ? 0 : deletions.size();
int orph = orphanRemovals == null ? 0 : orphanRemovals.size();
return del + orph;
}
public int numberOfUpdates() {
if( updates == null ) {
return 0;
}
return updates.size();
}
public int numberOfInsertions() {
if( insertions == null ) {
return 0;
}
return insertions.size();
}
public TransactionCompletionProcesses getTransactionCompletionProcesses() {
if( beforeTransactionProcesses == null ) {
beforeTransactionProcesses = new BeforeTransactionCompletionProcessQueue( session );
}
if( afterTransactionProcesses == null ) {
afterTransactionProcesses = new AfterTransactionCompletionProcessQueue( session );
}
return new TransactionCompletionProcesses( beforeTransactionProcesses, afterTransactionProcesses );
}
/**
* Bind transaction completion processes to make them shared between primary and secondary session.
* Transaction completion processes are always executed by transaction owner (primary session),
* but can be registered using secondary session too.
*
* @param processes Transaction completion processes.
* @param isTransactionCoordinatorShared Flag indicating shared transaction context.
*/
public void setTransactionCompletionProcesses(TransactionCompletionProcesses processes, boolean isTransactionCoordinatorShared) {
this.isTransactionCoordinatorShared = isTransactionCoordinatorShared;
this.beforeTransactionProcesses = processes.beforeTransactionCompletionProcesses;
this.afterTransactionProcesses = processes.afterTransactionCompletionProcesses;
}
public void sortCollectionActions() {
if ( isOrderUpdatesEnabled() ) {
// sort the updates by fk
if( collectionCreations != null ) {
collectionCreations.sort();
}
if( collectionUpdates != null ) {
collectionUpdates.sort();
}
if( collectionQueuedOps != null ) {
collectionQueuedOps.sort();
}
if( collectionRemovals != null ) {
collectionRemovals.sort();
}
}
}
public void sortActions() {
if ( isOrderUpdatesEnabled() && updates != null ) {
// sort the updates by pk
updates.sort();
}
if ( isOrderInsertsEnabled() && insertions != null ) {
insertions.sort();
}
}
private boolean isOrderUpdatesEnabled() {
return session.getFactory().getSessionFactoryOptions().isOrderUpdatesEnabled();
}
private boolean isOrderInsertsEnabled() {
return session.getFactory().getSessionFactoryOptions().isOrderInsertsEnabled();
}
public void clearFromFlushNeededCheck(int previousCollectionRemovalSize) {
if( collectionCreations != null ) {
collectionCreations.clear();
}
if( collectionUpdates != null ) {
collectionUpdates.clear();
}
if( collectionQueuedOps != null ) {
collectionQueuedOps.clear();
}
if( updates != null) {
updates.clear();
}
// collection deletions are a special case since update() can add
// deletions of collections not loaded by the session.
if ( collectionRemovals != null && collectionRemovals.size() > previousCollectionRemovalSize ) {
collectionRemovals.removeLastN( collectionRemovals.size() - previousCollectionRemovalSize );
}
}
@SuppressWarnings("SimplifiableConditionalExpression")
public boolean hasAfterTransactionActions() {
return isTransactionCoordinatorShared ? false : afterTransactionProcesses != null && afterTransactionProcesses.hasActions();
}
@SuppressWarnings("SimplifiableConditionalExpression")
public boolean hasBeforeTransactionActions() {
return isTransactionCoordinatorShared ? false : beforeTransactionProcesses != null && beforeTransactionProcesses.hasActions();
}
public boolean hasAnyQueuedActions() {
return ( updates != null && !updates.isEmpty() ) || ( insertions != null && !insertions.isEmpty() ) || hasUnresolvedEntityInsertActions()
|| ( deletions != null && !deletions.isEmpty()) || ( collectionUpdates != null && !collectionUpdates.isEmpty() )
|| ( collectionQueuedOps != null && !collectionQueuedOps.isEmpty() ) || ( collectionRemovals != null && !collectionRemovals.isEmpty() )
|| ( collectionCreations != null && !collectionCreations.isEmpty() );
}
public void unScheduleDeletion(EntityEntry entry, Object rescuedEntity) {
if ( rescuedEntity instanceof HibernateProxy ) {
LazyInitializer initializer = ( ( HibernateProxy ) rescuedEntity ).getHibernateLazyInitializer();
if ( !initializer.isUninitialized() ) {
rescuedEntity = initializer.getImplementation( session );
}
}
if( deletions != null ) {
for ( int i = 0; i < deletions.size(); i++ ) {
EntityDeleteAction action = deletions.get(i);
if (action.getInstance() == rescuedEntity) {
deletions.remove(i);
return;
}
}
}
if( orphanRemovals != null ) {
for ( int i = 0; i < orphanRemovals.size(); i++ ) {
EntityDeleteAction action = orphanRemovals.get(i);
if (action.getInstance() == rescuedEntity) {
orphanRemovals.remove(i);
return;
}
}
}
throw new AssertionFailure( "Unable to perform un-delete for instance " + entry.getEntityName() );
}
/**
* Used by the owning session to explicitly control serialization of the action queue
*
* @param oos The stream to which the action queue should get written
* @throws IOException Indicates an error writing to the stream
*/
public void serialize(ObjectOutputStream oos) throws IOException {
LOG.trace( "Serializing action-queue" );
if( unresolvedInsertions == null ) {
unresolvedInsertions = new UnresolvedEntityInsertActions();
}
unresolvedInsertions.serialize( oos );
for ( ListProvider p : EXECUTABLE_LISTS_MAP.values() ) {
ExecutableList<?> l = p.get(this);
if( l == null ) {
oos.writeBoolean(false);
}
else {
oos.writeBoolean( true );
l.writeExternal( oos );
}
}
}
/**
* Used by the owning session to explicitly control deserialization of the action queue.
*
* @param ois The stream from which to read the action queue
* @param session The session to which the action queue belongs
* @return The deserialized action queue
* @throws IOException indicates a problem reading from the stream
* @throws ClassNotFoundException Generally means we were unable to locate user classes.
*/
public static ActionQueue deserialize(ObjectInputStream ois, SessionImplementor session) throws IOException, ClassNotFoundException {
final boolean traceEnabled = LOG.isTraceEnabled();
if ( traceEnabled ) {
LOG.trace("Deserializing action-queue");
}
ActionQueue rtn = new ActionQueue( session );
rtn.unresolvedInsertions = UnresolvedEntityInsertActions.deserialize( ois, session );
for ( ListProvider provider : EXECUTABLE_LISTS_MAP.values() ) {
ExecutableList<?> l = provider.get(rtn);
boolean notNull = ois.readBoolean();
if( notNull ) {
if(l == null) {
l = provider.init(rtn);
}
l.readExternal( ois );
if ( traceEnabled ) {
LOG.tracev( "Deserialized [{0}] entries", l.size() );
}
l.afterDeserialize( session );
}
}
return rtn;
}
private static abstract class AbstractTransactionCompletionProcessQueue<T> {
protected SessionImplementor session;
// Concurrency handling required when transaction completion process is dynamically registered
// inside event listener (HHH-7478).
protected Queue<T> processes = new ConcurrentLinkedQueue<T>();
private AbstractTransactionCompletionProcessQueue(SessionImplementor session) {
this.session = session;
}
public void register(T process) {
if ( process == null ) {
return;
}
processes.add( process );
}
public boolean hasActions() {
return !processes.isEmpty();
}
}
/**
* Encapsulates behavior needed for before transaction processing
*/
private static class BeforeTransactionCompletionProcessQueue extends AbstractTransactionCompletionProcessQueue<BeforeTransactionCompletionProcess> {
private BeforeTransactionCompletionProcessQueue(SessionImplementor session) {
super( session );
}
public void beforeTransactionCompletion() {
while ( !processes.isEmpty() ) {
try {
processes.poll().doBeforeTransactionCompletion( session );
}
catch (HibernateException he) {
throw he;
}
catch (Exception e) {
throw new AssertionFailure( "Unable to perform beforeTransactionCompletion callback", e );
}
}
}
}
/**
* Encapsulates behavior needed for after transaction processing
*/
private static class AfterTransactionCompletionProcessQueue extends AbstractTransactionCompletionProcessQueue<AfterTransactionCompletionProcess> {
private Set<String> querySpacesToInvalidate = new HashSet<String>();
private AfterTransactionCompletionProcessQueue(SessionImplementor session) {
super( session );
}
public void addSpaceToInvalidate(String space) {
querySpacesToInvalidate.add( space );
}
public void afterTransactionCompletion(boolean success) {
while ( !processes.isEmpty() ) {
try {
processes.poll().doAfterTransactionCompletion( success, session );
}
catch (CacheException ce) {
LOG.unableToReleaseCacheLock( ce );
// continue loop
}
catch (Exception e) {
throw new AssertionFailure( "Exception releasing cache locks", e );
}
}
if ( session.getFactory().getSessionFactoryOptions().isQueryCacheEnabled() ) {
session.getFactory().getUpdateTimestampsCache().invalidate(
querySpacesToInvalidate.toArray( new String[querySpacesToInvalidate.size()] ),
session
);
}
querySpacesToInvalidate.clear();
}
}
/**
* Wrapper class allowing to bind the same transaction completion process queues in different sessions.
*/
public static class TransactionCompletionProcesses {
private final BeforeTransactionCompletionProcessQueue beforeTransactionCompletionProcesses;
private final AfterTransactionCompletionProcessQueue afterTransactionCompletionProcesses;
private TransactionCompletionProcesses(
BeforeTransactionCompletionProcessQueue beforeTransactionCompletionProcessQueue,
AfterTransactionCompletionProcessQueue afterTransactionCompletionProcessQueue) {
this.beforeTransactionCompletionProcesses = beforeTransactionCompletionProcessQueue;
this.afterTransactionCompletionProcesses = afterTransactionCompletionProcessQueue;
}
}
/**
* Order the {@link #insertions} queue such that we group inserts against the same entity together (without
* violating constraints). The original order is generated by cascade order, which in turn is based on the
* directionality of foreign-keys. So even though we will be changing the ordering here, we need to make absolutely
* certain that we do not circumvent this FK ordering to the extent of causing constraint violations.
* <p>
* Sorts the insert actions using more hashes.
* </p>
* NOTE: this class is not thread-safe.
*
* @author Jay Erb
*/
private static class InsertActionSorter implements ExecutableList.Sorter<AbstractEntityInsertAction> {
/**
* Singleton access
*/
public static final InsertActionSorter INSTANCE = new InsertActionSorter();
private static class BatchIdentifier {
private final String entityName;
private Set<String> parentEntityNames = new HashSet<>( );
private Set<String> childEntityNames = new HashSet<>( );
public BatchIdentifier(
String entityName) {
this.entityName = entityName;
}
@Override
public boolean equals(Object o) {
if ( this == o ) {
return true;
}
if ( !( o instanceof BatchIdentifier ) ) {
return false;
}
BatchIdentifier that = (BatchIdentifier) o;
return Objects.equals( entityName, that.entityName );
}
@Override
public int hashCode() {
return Objects.hash( entityName );
}
public String getEntityName() {
return entityName;
}
public Set<String> getParentEntityNames() {
return parentEntityNames;
}
public Set<String> getChildEntityNames() {
return childEntityNames;
}
}
// the mapping of entity names to their latest batch numbers.
private List<BatchIdentifier> latestBatches;
private Map<Object, BatchIdentifier> entityBatchIdentifier;
// the map of batch numbers to EntityInsertAction lists
private Map<BatchIdentifier, List<AbstractEntityInsertAction>> actionBatches;
public InsertActionSorter() {
}
/**
* Sort the insert actions.
*/
public void sort(List<AbstractEntityInsertAction> insertions) {
// optimize the hash size to eliminate a rehash.
this.latestBatches = new ArrayList<>( );
this.entityBatchIdentifier = new HashMap<>( insertions.size() + 1, 1.0f );
this.actionBatches = new HashMap<>();
for ( AbstractEntityInsertAction action : insertions ) {
BatchIdentifier batchIdentifier = new BatchIdentifier( action.getEntityName() );
// the entity associated with the current action.
Object currentEntity = action.getInstance();
int index = latestBatches.indexOf( batchIdentifier );
if ( index != -1 ) {
batchIdentifier = latestBatches.get( index );
}
else {
latestBatches.add( batchIdentifier );
}
addParentChildEntityNames( action, batchIdentifier );
entityBatchIdentifier.put( currentEntity, batchIdentifier );
addToBatch(batchIdentifier, action);
}
insertions.clear();
for ( int i = 0; i < latestBatches.size(); i++ ) {
BatchIdentifier batchIdentifier = latestBatches.get( i );
String entityName = batchIdentifier.getEntityName();
//Make sure that child entries are not before parents
for ( int j = i - 1; j >= 0; j-- ) {
BatchIdentifier prevBatchIdentifier = latestBatches.get( j );
if(prevBatchIdentifier.getParentEntityNames().contains( entityName )) {
latestBatches.remove( batchIdentifier );
latestBatches.add( j, batchIdentifier );
}
}
//Make sure that parent entries are not after children
for ( int j = i + 1; j < latestBatches.size(); j++ ) {
BatchIdentifier nextBatchIdentifier = latestBatches.get( j );
//Take care of unidirectional @OneToOne associations but exclude bidirectional @ManyToMany
if(nextBatchIdentifier.getChildEntityNames().contains( entityName ) &&
!batchIdentifier.getChildEntityNames().contains( nextBatchIdentifier.getEntityName() )) {
latestBatches.remove( batchIdentifier );
latestBatches.add( j, batchIdentifier );
}
}
}
// now rebuild the insertions list. There is a batch for each entry in the name list.
for ( BatchIdentifier rootIdentifier : latestBatches ) {
List<AbstractEntityInsertAction> batch = actionBatches.get( rootIdentifier );
insertions.addAll( batch );
}
}
/**
* Add parent and child entity names so that we know how to rearrange dependencies
*
* @param action The action being sorted
* @param batchIdentifier The batch identifier of the entity affected by the action
*/
private void addParentChildEntityNames(AbstractEntityInsertAction action, BatchIdentifier batchIdentifier) {
Object[] propertyValues = action.getState();
ClassMetadata classMetadata = action.getPersister().getClassMetadata();
if ( classMetadata != null ) {
Type[] propertyTypes = classMetadata.getPropertyTypes();
for ( int i = 0; i < propertyValues.length; i++ ) {
Object value = propertyValues[i];
Type type = propertyTypes[i];
if ( type.isEntityType() && value != null ) {
EntityType entityType = (EntityType) type;
String entityName = entityType.getName();
if ( entityType.isOneToOne() &&
OneToOneType.class.cast( entityType ).getForeignKeyDirection() == ForeignKeyDirection.TO_PARENT ) {
batchIdentifier.getChildEntityNames().add( entityName );
}
else {
batchIdentifier.getParentEntityNames().add( entityName );
}
}
else if ( type.isCollectionType() && value != null ) {
CollectionType collectionType = (CollectionType) type;
final SessionFactoryImplementor sessionFactory = ( (SessionImplementor) action.getSession() )
.getSessionFactory();
if ( collectionType.getElementType( sessionFactory ).isEntityType() ) {
String entityName = collectionType.getAssociatedEntityName( sessionFactory );
batchIdentifier.getChildEntityNames().add( entityName );
}
}
}
}
}
private void addToBatch(BatchIdentifier batchIdentifier, AbstractEntityInsertAction action) {
List<AbstractEntityInsertAction> actions = actionBatches.get( batchIdentifier );
if ( actions == null ) {
actions = new LinkedList<>();
actionBatches.put( batchIdentifier, actions );
}
actions.add( action );
}
}
private static abstract class ListProvider<T extends Executable & Comparable & Serializable> {
abstract ExecutableList<T> get(ActionQueue instance);
abstract ExecutableList<T> init(ActionQueue instance);
ExecutableList<T> getOrInit( ActionQueue instance ) {
ExecutableList<T> list = get( instance );
if ( list == null ) {
list = init( instance );
}
return list;
}
}
}