org.springframework.orm.hibernate.SessionFactoryUtils Maven / Gradle / Ivy
/*
* Copyright 2002-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.orm.hibernate;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.sql.DataSource;
import javax.transaction.Status;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import net.sf.hibernate.Criteria;
import net.sf.hibernate.FlushMode;
import net.sf.hibernate.HibernateException;
import net.sf.hibernate.Interceptor;
import net.sf.hibernate.JDBCException;
import net.sf.hibernate.NonUniqueResultException;
import net.sf.hibernate.ObjectDeletedException;
import net.sf.hibernate.PersistentObjectException;
import net.sf.hibernate.Query;
import net.sf.hibernate.QueryException;
import net.sf.hibernate.Session;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.StaleObjectStateException;
import net.sf.hibernate.TransientObjectException;
import net.sf.hibernate.UnresolvableObjectException;
import net.sf.hibernate.WrongClassException;
import net.sf.hibernate.connection.ConnectionProvider;
import net.sf.hibernate.engine.SessionFactoryImplementor;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.CollectionFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.DataAccessResourceFailureException;
import org.springframework.dao.IncorrectResultSizeDataAccessException;
import org.springframework.dao.InvalidDataAccessApiUsageException;
import org.springframework.jdbc.datasource.DataSourceUtils;
import org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator;
import org.springframework.jdbc.support.SQLExceptionTranslator;
import org.springframework.jdbc.support.SQLStateSQLExceptionTranslator;
import org.springframework.transaction.jta.SpringJtaSynchronizationAdapter;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.util.Assert;
/**
* Helper class featuring methods for Hibernate Session handling,
* allowing for reuse of Hibernate Session instances within transactions.
* Also provides support for exception translation.
*
* Supports synchronization with both Spring-managed JTA transactions
* (see {@link org.springframework.transaction.jta.JtaTransactionManager})
* and non-Spring JTA transactions (i.e. plain JTA or EJB CMT),
* transparently providing transaction-scoped Hibernate Sessions.
* Note that for non-Spring JTA transactions, a JTA TransactionManagerLookup
* has to be specified in the Hibernate configuration.
*
*
Used internally by {@link HibernateTemplate}, {@link HibernateInterceptor}
* and {@link HibernateTransactionManager}. Can also be used directly in
* application code.
*
*
Note: Spring's Hibernate support in this package requires Hibernate 2.1.
* Dedicated Hibernate3 support can be found in a separate package:
* org.springframework.orm.hibernate3.
*
* @author Juergen Hoeller
* @since 02.05.2003
* @see #getSession
* @see #releaseSession
* @see HibernateTransactionManager
* @see org.springframework.transaction.jta.JtaTransactionManager
* @see org.springframework.transaction.support.TransactionSynchronizationManager
*/
public abstract class SessionFactoryUtils {
/**
* Order value for TransactionSynchronization objects that clean up Hibernate Sessions.
* Returns DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER - 100
* to execute Session cleanup before JDBC Connection cleanup, if any.
* @see org.springframework.jdbc.datasource.DataSourceUtils#CONNECTION_SYNCHRONIZATION_ORDER
*/
public static final int SESSION_SYNCHRONIZATION_ORDER =
DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER - 100;
static final Log logger = LogFactory.getLog(SessionFactoryUtils.class);
private static final ThreadLocal deferredCloseHolder = new ThreadLocal();
/**
* Determine the DataSource of the given SessionFactory.
* @param sessionFactory the SessionFactory to check
* @return the DataSource, or null if none found
* @see net.sf.hibernate.engine.SessionFactoryImplementor#getConnectionProvider
* @see LocalDataSourceConnectionProvider
*/
public static DataSource getDataSource(SessionFactory sessionFactory) {
if (sessionFactory instanceof SessionFactoryImplementor) {
ConnectionProvider cp = ((SessionFactoryImplementor) sessionFactory).getConnectionProvider();
if (cp instanceof LocalDataSourceConnectionProvider) {
return ((LocalDataSourceConnectionProvider) cp).getDataSource();
}
}
return null;
}
/**
* Create an appropriate SQLExceptionTranslator for the given SessionFactory.
* If a DataSource is found, a SQLErrorCodeSQLExceptionTranslator for the DataSource
* is created; else, a SQLStateSQLExceptionTranslator as fallback.
* @param sessionFactory the SessionFactory to create the translator for
* @return the SQLExceptionTranslator
* @see #getDataSource
* @see org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator
* @see org.springframework.jdbc.support.SQLStateSQLExceptionTranslator
*/
public static SQLExceptionTranslator newJdbcExceptionTranslator(SessionFactory sessionFactory) {
DataSource ds = getDataSource(sessionFactory);
if (ds != null) {
return new SQLErrorCodeSQLExceptionTranslator(ds);
}
return new SQLStateSQLExceptionTranslator();
}
/**
* Try to retrieve the JTA TransactionManager from the given SessionFactory
* and/or Session. Check the passed-in SessionFactory for implementing
* SessionFactoryImplementor (the usual case), falling back to the
* SessionFactory reference that the Session itself carries (for example,
* when using Hibernate's JCA Connector, i.e. JCASessionFactoryImpl).
* @param sessionFactory Hibernate SessionFactory
* @param session Hibernate Session (can also be null)
* @return the JTA TransactionManager, if any
* @see javax.transaction.TransactionManager
* @see SessionFactoryImplementor#getTransactionManager
* @see Session#getSessionFactory
* @see net.sf.hibernate.impl.SessionFactoryImpl
* @see net.sf.hibernate.jca.JCASessionFactoryImpl
*/
public static TransactionManager getJtaTransactionManager(SessionFactory sessionFactory, Session session) {
SessionFactoryImplementor sessionFactoryImpl = null;
if (sessionFactory instanceof SessionFactoryImplementor) {
sessionFactoryImpl = ((SessionFactoryImplementor) sessionFactory);
}
else if (session != null) {
SessionFactory internalFactory = session.getSessionFactory();
if (internalFactory instanceof SessionFactoryImplementor) {
sessionFactoryImpl = (SessionFactoryImplementor) internalFactory;
}
}
return (sessionFactoryImpl != null ? sessionFactoryImpl.getTransactionManager() : null);
}
/**
* Get a Hibernate Session for the given SessionFactory. Is aware of and will
* return any existing corresponding Session bound to the current thread, for
* example when using {@link HibernateTransactionManager}. Will create a new
* Session otherwise, if "allowCreate" is true.
*
This is the getSession method used by typical data access code,
* in combination with releaseSession called when done with
* the Session. Note that HibernateTemplate allows to write data access code
* without caring about such resource handling.
* @param sessionFactory Hibernate SessionFactory to create the session with
* @param allowCreate whether a non-transactional Session should be created
* when no transactional Session can be found for the current thread
* @return the Hibernate Session
* @throws DataAccessResourceFailureException if the Session couldn't be created
* @throws IllegalStateException if no thread-bound Session found and
* "allowCreate" is false
* @see #releaseSession
* @see HibernateTemplate
*/
public static Session getSession(SessionFactory sessionFactory, boolean allowCreate)
throws DataAccessResourceFailureException, IllegalStateException {
return getSession(sessionFactory, null, null, allowCreate);
}
/**
* Get a Hibernate Session for the given SessionFactory. Is aware of and will
* return any existing corresponding Session bound to the current thread, for
* example when using {@link HibernateTransactionManager}. Will always create
* a new Session otherwise.
*
Supports setting a Session-level Hibernate entity interceptor that allows
* to inspect and change property values before writing to and reading from the
* database. Such an interceptor can also be set at the SessionFactory level
* (i.e. on LocalSessionFactoryBean), on HibernateTransactionManager, or on
* HibernateInterceptor/HibernateTemplate.
* @param sessionFactory Hibernate SessionFactory to create the session with
* @param entityInterceptor Hibernate entity interceptor, or null if none
* @param jdbcExceptionTranslator SQLExceptionTranslator to use for flushing the
* Session on transaction synchronization (may be null; only used
* when actually registering a transaction synchronization)
* @return the Hibernate Session
* @throws DataAccessResourceFailureException if the Session couldn't be created
* @see LocalSessionFactoryBean#setEntityInterceptor
* @see HibernateInterceptor#setEntityInterceptor
* @see HibernateTemplate#setEntityInterceptor
*/
public static Session getSession(
SessionFactory sessionFactory, Interceptor entityInterceptor,
SQLExceptionTranslator jdbcExceptionTranslator) throws DataAccessResourceFailureException {
return getSession(sessionFactory, entityInterceptor, jdbcExceptionTranslator, true);
}
/**
* Get a Hibernate Session for the given SessionFactory. Is aware of and will
* return any existing corresponding Session bound to the current thread, for
* example when using {@link HibernateTransactionManager}. Will create a new
* Session otherwise, if "allowCreate" is true.
* @param sessionFactory Hibernate SessionFactory to create the session with
* @param entityInterceptor Hibernate entity interceptor, or null if none
* @param jdbcExceptionTranslator SQLExceptionTranslator to use for flushing the
* Session on transaction synchronization (may be null)
* @param allowCreate whether a non-transactional Session should be created
* when no transactional Session can be found for the current thread
* @return the Hibernate Session
* @throws DataAccessResourceFailureException if the Session couldn't be created
* @throws IllegalStateException if no thread-bound Session found and
* "allowCreate" is false
*/
private static Session getSession(
SessionFactory sessionFactory, Interceptor entityInterceptor,
SQLExceptionTranslator jdbcExceptionTranslator, boolean allowCreate)
throws DataAccessResourceFailureException, IllegalStateException {
Assert.notNull(sessionFactory, "No SessionFactory specified");
SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager.getResource(sessionFactory);
if (sessionHolder != null && !sessionHolder.isEmpty()) {
// pre-bound Hibernate Session
Session session = null;
if (TransactionSynchronizationManager.isSynchronizationActive() &&
sessionHolder.doesNotHoldNonDefaultSession()) {
// Spring transaction management is active ->
// register pre-bound Session with it for transactional flushing.
session = sessionHolder.getValidatedSession();
if (!sessionHolder.isSynchronizedWithTransaction()) {
logger.debug("Registering Spring transaction synchronization for existing Hibernate Session");
TransactionSynchronizationManager.registerSynchronization(
new SpringSessionSynchronization(sessionHolder, sessionFactory, jdbcExceptionTranslator, false));
sessionHolder.setSynchronizedWithTransaction(true);
// Switch to FlushMode.AUTO if we're not within a read-only transaction.
FlushMode flushMode = session.getFlushMode();
if (FlushMode.NEVER.equals(flushMode) &&
!TransactionSynchronizationManager.isCurrentTransactionReadOnly()) {
session.setFlushMode(FlushMode.AUTO);
sessionHolder.setPreviousFlushMode(flushMode);
}
}
}
else {
// No Spring transaction management active -> try JTA transaction synchronization.
session = getJtaSynchronizedSession(sessionHolder, sessionFactory, jdbcExceptionTranslator);
}
if (session != null) {
return session;
}
}
try {
logger.debug("Opening Hibernate Session");
Session session = (entityInterceptor != null ?
sessionFactory.openSession(entityInterceptor) : sessionFactory.openSession());
// Set Session to FlushMode.NEVER if we're within a read-only transaction.
// Use same Session for further Hibernate actions within the transaction.
// Thread object will get removed by synchronization at transaction completion.
if (TransactionSynchronizationManager.isSynchronizationActive()) {
// We're within a Spring-managed transaction, possibly from JtaTransactionManager.
logger.debug("Registering Spring transaction synchronization for new Hibernate Session");
SessionHolder holderToUse = sessionHolder;
if (holderToUse == null) {
holderToUse = new SessionHolder(session);
}
else {
holderToUse.addSession(session);
}
if (TransactionSynchronizationManager.isCurrentTransactionReadOnly()) {
session.setFlushMode(FlushMode.NEVER);
}
TransactionSynchronizationManager.registerSynchronization(
new SpringSessionSynchronization(holderToUse, sessionFactory, jdbcExceptionTranslator, true));
holderToUse.setSynchronizedWithTransaction(true);
if (holderToUse != sessionHolder) {
TransactionSynchronizationManager.bindResource(sessionFactory, holderToUse);
}
}
else {
// No Spring transaction management active -> try JTA transaction synchronization.
registerJtaSynchronization(session, sessionFactory, jdbcExceptionTranslator, sessionHolder);
}
// Check whether we are allowed to return the Session.
if (!allowCreate && !isSessionTransactional(session, sessionFactory)) {
closeSession(session);
throw new IllegalStateException("No Hibernate Session bound to thread, " +
"and configuration does not allow creation of non-transactional one here");
}
return session;
}
catch (HibernateException ex) {
throw new DataAccessResourceFailureException("Could not open Hibernate Session", ex);
}
}
/**
* Retrieve a Session from the given SessionHolder, potentially from a
* JTA transaction synchronization.
* @param sessionHolder the SessionHolder to check
* @param sessionFactory the SessionFactory to get the JTA TransactionManager from
* @param jdbcExceptionTranslator SQLExceptionTranslator to use for flushing the
* Session on transaction synchronization (may be null)
* @return the associated Session, if any
* @throws DataAccessResourceFailureException if the Session couldn't be created
*/
private static Session getJtaSynchronizedSession(
SessionHolder sessionHolder, SessionFactory sessionFactory,
SQLExceptionTranslator jdbcExceptionTranslator) throws DataAccessResourceFailureException {
// JTA synchronization is only possible with a javax.transaction.TransactionManager.
// We'll check the Hibernate SessionFactory: If a TransactionManagerLookup is specified
// in Hibernate configuration, it will contain a TransactionManager reference.
TransactionManager jtaTm = getJtaTransactionManager(sessionFactory, sessionHolder.getAnySession());
if (jtaTm != null) {
// Check whether JTA transaction management is active ->
// fetch pre-bound Session for the current JTA transaction, if any.
// (just necessary for JTA transaction suspension, with an individual
// Hibernate Session per currently active/suspended transaction)
try {
// Look for transaction-specific Session.
Transaction jtaTx = jtaTm.getTransaction();
if (jtaTx != null) {
int jtaStatus = jtaTx.getStatus();
if (jtaStatus == Status.STATUS_ACTIVE || jtaStatus == Status.STATUS_MARKED_ROLLBACK) {
Session session = sessionHolder.getValidatedSession(jtaTx);
if (session == null && !sessionHolder.isSynchronizedWithTransaction()) {
// No transaction-specific Session found: If not already marked as
// synchronized with transaction, register the default thread-bound
// Session as JTA-transactional. If there is no default Session,
// we're a new inner JTA transaction with an outer one being suspended:
// In that case, we'll return null to trigger opening of a new Session.
session = sessionHolder.getValidatedSession();
if (session != null) {
logger.debug("Registering JTA transaction synchronization for existing Hibernate Session");
sessionHolder.addSession(jtaTx, session);
jtaTx.registerSynchronization(
new SpringJtaSynchronizationAdapter(
new SpringSessionSynchronization(sessionHolder, sessionFactory, jdbcExceptionTranslator, false),
jtaTm));
sessionHolder.setSynchronizedWithTransaction(true);
// Switch to FlushMode.AUTO if we're not within a read-only transaction.
FlushMode flushMode = session.getFlushMode();
if (FlushMode.NEVER.equals(flushMode)) {
session.setFlushMode(FlushMode.AUTO);
sessionHolder.setPreviousFlushMode(flushMode);
}
}
}
return session;
}
}
// No transaction active -> simply return default thread-bound Session, if any
// (possibly from OpenSessionInViewFilter/Interceptor).
return sessionHolder.getValidatedSession();
}
catch (Throwable ex) {
throw new DataAccessResourceFailureException("Could not check JTA transaction", ex);
}
}
else {
// No JTA TransactionManager -> simply return default thread-bound Session, if any
// (possibly from OpenSessionInViewFilter/Interceptor).
return sessionHolder.getValidatedSession();
}
}
/**
* Register a JTA synchronization for the given Session, if any.
* @param sessionHolder the existing thread-bound SessionHolder, if any
* @param session the Session to register
* @param sessionFactory the SessionFactory that the Session was created with
* @param jdbcExceptionTranslator SQLExcepionTranslator to use for flushing the
* Session on transaction synchronization (may be null)
*/
private static void registerJtaSynchronization(Session session, SessionFactory sessionFactory,
SQLExceptionTranslator jdbcExceptionTranslator, SessionHolder sessionHolder) {
// JTA synchronization is only possible with a javax.transaction.TransactionManager.
// We'll check the Hibernate SessionFactory: If a TransactionManagerLookup is specified
// in Hibernate configuration, it will contain a TransactionManager reference.
TransactionManager jtaTm = getJtaTransactionManager(sessionFactory, session);
if (jtaTm != null) {
try {
Transaction jtaTx = jtaTm.getTransaction();
if (jtaTx != null) {
int jtaStatus = jtaTx.getStatus();
if (jtaStatus == Status.STATUS_ACTIVE || jtaStatus == Status.STATUS_MARKED_ROLLBACK) {
logger.debug("Registering JTA transaction synchronization for new Hibernate Session");
SessionHolder holderToUse = sessionHolder;
// Register JTA Transaction with existing SessionHolder.
// Create a new SessionHolder if none existed before.
if (holderToUse == null) {
holderToUse = new SessionHolder(jtaTx, session);
}
else {
holderToUse.addSession(jtaTx, session);
}
jtaTx.registerSynchronization(
new SpringJtaSynchronizationAdapter(
new SpringSessionSynchronization(holderToUse, sessionFactory, jdbcExceptionTranslator, true),
jtaTm));
holderToUse.setSynchronizedWithTransaction(true);
if (holderToUse != sessionHolder) {
TransactionSynchronizationManager.bindResource(sessionFactory, holderToUse);
}
}
}
}
catch (Throwable ex) {
throw new DataAccessResourceFailureException(
"Could not register synchronization with JTA TransactionManager", ex);
}
}
}
/**
* Get a new Hibernate Session from the given SessionFactory.
* Will return a new Session even if there already is a pre-bound
* Session for the given SessionFactory.
*
Within a transaction, this method will create a new Session
* that shares the transaction's JDBC Connection. More specifically,
* it will use the same JDBC Connection as the pre-bound Hibernate Session.
* @param sessionFactory Hibernate SessionFactory to create the session with
* @return the new Session
*/
public static Session getNewSession(SessionFactory sessionFactory) {
return getNewSession(sessionFactory, null);
}
/**
* Get a new Hibernate Session from the given SessionFactory.
* Will return a new Session even if there already is a pre-bound
* Session for the given SessionFactory.
*
Within a transaction, this method will create a new Session
* that shares the transaction's JDBC Connection. More specifically,
* it will use the same JDBC Connection as the pre-bound Hibernate Session.
* @param sessionFactory Hibernate SessionFactory to create the session with
* @param entityInterceptor Hibernate entity interceptor, or null if none
* @return the new Session
*/
public static Session getNewSession(SessionFactory sessionFactory, Interceptor entityInterceptor) {
Assert.notNull(sessionFactory, "No SessionFactory specified");
try {
SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager.getResource(sessionFactory);
if (sessionHolder != null && !sessionHolder.isEmpty()) {
if (entityInterceptor != null) {
return sessionFactory.openSession(sessionHolder.getAnySession().connection(), entityInterceptor);
}
else {
return sessionFactory.openSession(sessionHolder.getAnySession().connection());
}
}
else {
if (entityInterceptor != null) {
return sessionFactory.openSession(entityInterceptor);
}
else {
return sessionFactory.openSession();
}
}
}
catch (HibernateException ex) {
throw new DataAccessResourceFailureException("Could not open Hibernate Session", ex);
}
}
/**
* Return whether the given Hibernate Session is transactional, that is,
* bound to the current thread by Spring's transaction facilities.
* @param session the Hibernate Session to check
* @param sessionFactory Hibernate SessionFactory that the Session was created with
* (may be null)
* @return whether the Session is transactional
*/
public static boolean isSessionTransactional(Session session, SessionFactory sessionFactory) {
if (sessionFactory == null) {
return false;
}
SessionHolder sessionHolder =
(SessionHolder) TransactionSynchronizationManager.getResource(sessionFactory);
return (sessionHolder != null && sessionHolder.containsSession(session));
}
/**
* Apply the current transaction timeout, if any, to the given
* Hibernate Query object.
* @param query the Hibernate Query object
* @param sessionFactory Hibernate SessionFactory that the Query was created for
* (may be null)
* @see net.sf.hibernate.Query#setTimeout
*/
public static void applyTransactionTimeout(Query query, SessionFactory sessionFactory) {
Assert.notNull(query, "No Query object specified");
if (sessionFactory != null) {
SessionHolder sessionHolder =
(SessionHolder) TransactionSynchronizationManager.getResource(sessionFactory);
if (sessionHolder != null && sessionHolder.hasTimeout()) {
query.setTimeout(sessionHolder.getTimeToLiveInSeconds());
}
}
}
/**
* Apply the current transaction timeout, if any, to the given
* Hibernate Criteria object.
* @param criteria the Hibernate Criteria object
* @param sessionFactory Hibernate SessionFactory that the Criteria was created for
* @see net.sf.hibernate.Criteria#setTimeout
*/
public static void applyTransactionTimeout(Criteria criteria, SessionFactory sessionFactory) {
Assert.notNull(criteria, "No Criteria object specified");
SessionHolder sessionHolder =
(SessionHolder) TransactionSynchronizationManager.getResource(sessionFactory);
if (sessionHolder != null && sessionHolder.hasTimeout()) {
criteria.setTimeout(sessionHolder.getTimeToLiveInSeconds());
}
}
/**
* Convert the given HibernateException to an appropriate exception
* from the org.springframework.dao hierarchy.
*
Note that it is advisable to handle {@link net.sf.hibernate.JDBCException}
* specifically by using a {@link org.springframework.jdbc.support.SQLExceptionTranslator}
* for the underlying SQLException.
* @param ex HibernateException that occured
* @return the corresponding DataAccessException instance
* @see HibernateAccessor#convertHibernateAccessException
* @see HibernateTransactionManager#convertHibernateAccessException
*/
public static DataAccessException convertHibernateAccessException(HibernateException ex) {
if (ex instanceof JDBCException) {
// SQLException during Hibernate access: only passed in here from custom code,
// as HibernateTemplate etc will use SQLExceptionTranslator-based handling.
return new HibernateJdbcException((JDBCException) ex);
}
if (ex instanceof PersistentObjectException) {
return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
}
if (ex instanceof TransientObjectException) {
return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
}
if (ex instanceof ObjectDeletedException) {
return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
}
if (ex instanceof QueryException) {
return new HibernateQueryException((QueryException) ex);
}
if (ex instanceof UnresolvableObjectException) {
return new HibernateObjectRetrievalFailureException((UnresolvableObjectException) ex);
}
if (ex instanceof WrongClassException) {
return new HibernateObjectRetrievalFailureException((WrongClassException) ex);
}
if (ex instanceof NonUniqueResultException) {
return new IncorrectResultSizeDataAccessException(ex.getMessage(), 1);
}
if (ex instanceof StaleObjectStateException) {
return new HibernateOptimisticLockingFailureException((StaleObjectStateException) ex);
}
// fallback
return new HibernateSystemException(ex);
}
/**
* Determine whether deferred close is active for the current thread
* and the given SessionFactory.
* @param sessionFactory the Hibernate SessionFactory to check
* @return whether deferred close is active
*/
public static boolean isDeferredCloseActive(SessionFactory sessionFactory) {
Assert.notNull(sessionFactory, "No SessionFactory specified");
Map holderMap = (Map) deferredCloseHolder.get();
return (holderMap != null && holderMap.containsKey(sessionFactory));
}
/**
* Initialize deferred close for the current thread and the given SessionFactory.
* Sessions will not be actually closed on close calls then, but rather at a
* processDeferredClose call at a finishing point (like request completion).
*
Used by OpenSessionInViewFilter and OpenSessionInViewInterceptor
* when not configured for a single session.
* @param sessionFactory Hibernate SessionFactory
* @see #processDeferredClose
* @see #releaseSession
* @see org.springframework.orm.hibernate.support.OpenSessionInViewFilter#setSingleSession
* @see org.springframework.orm.hibernate.support.OpenSessionInViewInterceptor#setSingleSession
*/
public static void initDeferredClose(SessionFactory sessionFactory) {
Assert.notNull(sessionFactory, "No SessionFactory specified");
logger.debug("Initializing deferred close of Hibernate Sessions");
Map holderMap = (Map) deferredCloseHolder.get();
if (holderMap == null) {
holderMap = new HashMap();
deferredCloseHolder.set(holderMap);
}
holderMap.put(sessionFactory, CollectionFactory.createLinkedSetIfPossible(4));
}
/**
* Process Sessions that have been registered for deferred close
* for the given SessionFactory.
* @param sessionFactory Hibernate SessionFactory
* @see #initDeferredClose
* @see #releaseSession
*/
public static void processDeferredClose(SessionFactory sessionFactory) {
Assert.notNull(sessionFactory, "No SessionFactory specified");
Map holderMap = (Map) deferredCloseHolder.get();
if (holderMap == null || !holderMap.containsKey(sessionFactory)) {
throw new IllegalStateException("Deferred close not active for SessionFactory [" + sessionFactory + "]");
}
logger.debug("Processing deferred close of Hibernate Sessions");
Set sessions = (Set) holderMap.remove(sessionFactory);
for (Iterator it = sessions.iterator(); it.hasNext();) {
closeSession((Session) it.next());
}
if (holderMap.isEmpty()) {
deferredCloseHolder.set(null);
}
}
/**
* Close the given Session, created via the given factory,
* if it is not managed externally (i.e. not bound to the thread).
* @param session the Hibernate Session to close (may be null)
* @param sessionFactory Hibernate SessionFactory that the Session was created with
* (may be null)
*/
public static void releaseSession(Session session, SessionFactory sessionFactory) {
if (session == null) {
return;
}
// Only close non-transactional Sessions.
if (!isSessionTransactional(session, sessionFactory)) {
closeSessionOrRegisterDeferredClose(session, sessionFactory);
}
}
/**
* Close the given Session or register it for deferred close.
* @param session the Hibernate Session to close
* @param sessionFactory Hibernate SessionFactory that the Session was created with
* (may be null)
* @see #initDeferredClose
* @see #processDeferredClose
*/
static void closeSessionOrRegisterDeferredClose(Session session, SessionFactory sessionFactory) {
Map holderMap = (Map) deferredCloseHolder.get();
if (holderMap != null && sessionFactory != null && holderMap.containsKey(sessionFactory)) {
logger.debug("Registering Hibernate Session for deferred close");
// Switch Session to FlushMode.NEVER for remaining lifetime.
session.setFlushMode(FlushMode.NEVER);
Set sessions = (Set) holderMap.get(sessionFactory);
sessions.add(session);
}
else {
closeSession(session);
}
}
/**
* Perform actual closing of the Hibernate Session,
* catching and logging any cleanup exceptions thrown.
* @param session the Hibernate Session to close (may be null)
* @see net.sf.hibernate.Session#close()
*/
public static void closeSession(Session session) {
if (session != null) {
logger.debug("Closing Hibernate Session");
try {
session.close();
}
catch (HibernateException ex) {
logger.debug("Could not close Hibernate Session", ex);
}
catch (Throwable ex) {
logger.debug("Unexpected exception on closing Hibernate Session", ex);
}
}
}
}