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Spring Framework example source code file (SessionFactory.java)

This example Spring Framework source code file (SessionFactory.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

session, session, sessionfactory, sessionfactory, toplinkexception, toplinkexception

The Spring Framework SessionFactory.java source code

/*
 * Copyright 2002-2005 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.toplink;

import oracle.toplink.exceptions.TopLinkException;
import oracle.toplink.sessions.Session;

/**
 * The SessionFactory interface serves as factory for TopLink Sessions,
 * allowing for dependency injection on thread-safe TopLink-based DAOs.
 * Used by TopLinkAccessor/Template and TopLinkTransactionManager.
 *
 * <p>In contrast to JDO or Hibernate (which define native PersistenceManagerFactory
 * and SessionFactory interfaces, respectively), TopLink itself does not provide
 * such a factory interface: hence, it is necessary to define it within Spring.
 * Note that this interface does not depend on any other Spring interfaces or
 * classes, to allow for keeping TopLink-based DAOs as independent as possible.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see TopLinkAccessor#setSessionFactory
 * @see TopLinkTransactionManager#setSessionFactory
 */
public interface SessionFactory {

	/**
	 * Create a plain TopLink Session for the current application context.
	 * Will usually be a new ClientSession for the current thread.
	 * <p>The returned Session will participate in JTA transactions (provided that
	 * TopLink is configured with a corresponding external transaction controller),
	 * but not in Spring-managed transactions (by TopLinkTransactionManager).
	 * <p>This is the factory method to be called by TopLink data access code,
	 * usually through the <code>SessionFactoryUtils.getSession method
	 * that checks for a transactional (thread-bound) Session first.
	 * @return the new TopLink Session
	 * @throws TopLinkException in case of errors
	 * @see SessionFactoryUtils#getSession(SessionFactory, boolean)
	 */
	Session createSession() throws TopLinkException;

	/**
	 * Create a new managed TopLink client Session for the current context.
	 * Will usually be a new special ClientSession for the current thread.
	 * <p>The returned Session will be prepared to be managed within a Spring
	 * transaction (by TopLinkTransactionManager). It will carry an active
	 * UnitOfWork that expects to be committed at transaction completion,
	 * just like a plain TopLink Session does within a JTA transaction.
	 * <p>This method is only supposed to be called by Spring's
	 * TopLinkTransactionManager or similar TopLink-based transaction managers.
	 * If a SessionFactory does not support managed Sessions, it should throw
	 * an UnsupportedOperationException.
	 * @return the new TopLink Session
	 * @throws TopLinkException in case of errors
	 * @see oracle.toplink.sessions.Session#getActiveUnitOfWork()
	 */
	Session createManagedClientSession() throws TopLinkException;

	/**
	 * Create a new transaction-aware TopLink Session that exposes the currently
	 * active Session and UnitOfWork via <code>Session.getActiveSession()
	 * and <code>Session.getActiveUnitOfWork(), respectively.
	 * <p>Such a Session reference can be used analogously to a managed TopLink
	 * Session in a JTA environment, with Spring-managed transactions backing it.
	 * <p>It is usually preferable to let DAOs work with a full SessionFactory,
	 * accessing TopLink Sessions via <code>SessionFactoryUtils.getSession.
	 * However, a transaction-aware TopLink Session reference does not impose any
	 * Spring dependency, so might be preferable if you'd like to keep your data
	 * access code tied to TopLink API only.
	 * @return the new TopLink Session
	 * @throws TopLinkException in case of errors
	 * @see oracle.toplink.sessions.Session#getActiveSession()
	 * @see oracle.toplink.sessions.Session#getActiveUnitOfWork()
	 */ 
	Session createTransactionAwareSession() throws TopLinkException;

	/**
	 * Close this SessionFactory, shutting down all internal resources.
	 */
	void close();

}

Other Spring Framework examples (source code examples)

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