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Spring Framework example source code file (HibernateCallback.java)

This example Spring Framework source code file (HibernateCallback.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

hibernatecallback, hibernatecallback, hibernateexception, hibernateexception, jdbc, object, object, sql, sqlexception, sqlexception

The Spring Framework HibernateCallback.java source code

/*
 * Copyright 2002-2006 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;

import java.sql.SQLException;

import org.hibernate.HibernateException;
import org.hibernate.Session;

/**
 * Callback interface for Hibernate code. To be used with {@link HibernateTemplate}'s
 * execution methods, often as anonymous classes within a method implementation.
 * A typical implementation will call <code>Session.load/find/update to perform
 * some operations on persistent objects. It can also perform direct JDBC operations
 * via Hibernate's <code>Session.connection(), operating on a JDBC Connection.
 *
 * <p>Note that Hibernate works on unmodified plain Java objects, performing dirty
 * detection via copies made at load time. Returned objects can thus be used outside
 * of an active Hibernate Session without any hassle, e.g. for display in a web GUI.
 * Reassociating such instances with a new Session, e.g. for updates when coming
 * back from the GUI, is straightforward, as the instance has kept its identity.
 * You should care to reassociate them as early as possible though, to avoid having
 * already loaded a version from the database in the same Session.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see HibernateTemplate
 * @see HibernateTransactionManager
 */
public interface HibernateCallback {

	/**
	 * Gets called by <code>HibernateTemplate.execute with an active
	 * Hibernate <code>Session. Does not need to care about activating
	 * or closing the <code>Session, or handling transactions.
	 *
	 * <p>If called without a thread-bound Hibernate transaction (initiated
	 * by HibernateTransactionManager), the code will simply get executed on the
	 * underlying JDBC connection with its transactional semantics. If Hibernate
	 * is configured to use a JTA-aware DataSource, the JDBC connection and thus
	 * the callback code will be transactional if a JTA transaction is active.
	 *
	 * <p>Allows for returning a result object created within the callback,
	 * i.e. a domain object or a collection of domain objects.
	 * A thrown custom RuntimeException is treated as an application exception:
	 * It gets propagated to the caller of the template.
	 *
	 * @param session active Hibernate session
	 * @return a result object, or <code>null if none
	 * @throws HibernateException if thrown by the Hibernate API
	 * @throws SQLException if thrown by Hibernate-exposed JDBC API
	 * @see HibernateTemplate#execute
	 * @see HibernateTemplate#executeFind
	 */
	Object doInHibernate(Session session) throws HibernateException, SQLException;

}

Other Spring Framework examples (source code examples)

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