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/*
 * 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 .
 */
package org.hibernate;

import java.io.Serializable;

/**
 * Allows reaction to basic {@link SessionFactory} occurrences.
 *
 * @author Steve Ebersole
 */
public interface SessionFactoryObserver extends Serializable {
	/**
	 * Callback to indicate that the given factory has been created and is now ready for use.
	 *
	 * @param factory The factory initialized.
	 */
	default void sessionFactoryCreated(SessionFactory factory) {
		// nothing to do by default
	}

	/**
	 * Callback to indicate that the given factory is about to close.  The passed factory reference should be usable
	 * since it is only about to close.
	 * 
	 * NOTE : defined as default to allow for existing SessionFactoryObserver impls to work
	 * in 5.2.  Starting in 6.0 the default will be removed and SessionFactoryObserver impls
	 * will be required to implement this new method.
	 *
	 * @param factory The factory about to be closed.
	 *
	 * @since 5.2
	 */
	default void sessionFactoryClosing(SessionFactory factory) {
		// nothing to do by default
	}

	/**
	 * Callback to indicate that the given factory has been closed.  Care should be taken
	 * in how (if at all) the passed factory reference is used since it is closed.
	 *
	 * @param factory The factory closed.
	 */
	default void sessionFactoryClosed(SessionFactory factory) {
		// nothing to do by default
	}
}