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/* * Copyright 2002-2014 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.hibernate3.support; import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; import org.hibernate.FlushMode; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.springframework.beans.factory.InitializingBean; import org.springframework.dao.DataAccessResourceFailureException; import org.springframework.orm.hibernate3.SessionFactoryUtils; import org.springframework.orm.hibernate3.SessionHolder; import org.springframework.transaction.support.TransactionSynchronizationManager; /** * Simple AOP Alliance {@link MethodInterceptor} implementation that binds a new * Hibernate {@link Session} for each method invocation, if none bound before. * * <p>This is a simple Hibernate Session scoping interceptor along the lines of * {@link OpenSessionInViewInterceptor}, just for use with AOP setup instead of * MVC setup. It opens a new {@link Session} with flush mode "MANUAL" since the * Session is only meant for reading, except when participating in a transaction. * * <p>Note: This can serve as a streamlined alternative to the outdated * {@link org.springframework.orm.hibernate3.HibernateInterceptor}, providing * plain Session binding without any automatic exception translation or the like. * * @author Juergen Hoeller * @since 4.0.2 * @see OpenSessionInViewInterceptor * @see OpenSessionInViewFilter * @see org.springframework.orm.hibernate3.HibernateTransactionManager * @see org.springframework.transaction.support.TransactionSynchronizationManager * @see org.hibernate.SessionFactory#getCurrentSession() */ public class OpenSessionInterceptor implements MethodInterceptor, InitializingBean { private SessionFactory sessionFactory; /** * Set the Hibernate SessionFactory that should be used to create Hibernate Sessions. */ public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } /** * Return the Hibernate SessionFactory that should be used to create Hibernate Sessions. */ public SessionFactory getSessionFactory() { return this.sessionFactory; } @Override public void afterPropertiesSet() { if (getSessionFactory() == null) { throw new IllegalArgumentException("Property 'sessionFactory' is required"); } } @Override public Object invoke(MethodInvocation invocation) throws Throwable { SessionFactory sf = getSessionFactory(); if (!TransactionSynchronizationManager.hasResource(sf)) { // New Session to be bound for the current method's scope... Session session = openSession(); try { TransactionSynchronizationManager.bindResource(sf, new SessionHolder(session)); return invocation.proceed(); } finally { SessionFactoryUtils.closeSession(session); TransactionSynchronizationManager.unbindResource(sf); } } else { // Pre-bound Session found -> simply proceed. return invocation.proceed(); } } /** * Open a Session for the SessionFactory that this interceptor uses. * <p>The default implementation delegates to the {@link SessionFactory#openSession} * method and sets the {@link Session}'s flush mode to "MANUAL". * @return the Session to use * @throws DataAccessResourceFailureException if the Session could not be created * @see org.hibernate.FlushMode#MANUAL */ protected Session openSession() throws DataAccessResourceFailureException { try { Session session = getSessionFactory().openSession(); session.setFlushMode(FlushMode.MANUAL); return session; } catch (HibernateException ex) { throw new DataAccessResourceFailureException("Could not open Hibernate Session", ex); } } }