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Hibernate example source code file (SuppliedConnectionProviderConnectionHelper.java)

This example Hibernate source code file (SuppliedConnectionProviderConnectionHelper.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 - Hibernate tags/keywords

connection, connection, connectionhelper, connectionprovider, jdbc, sql, sqlexception, sqlexception, suppliedconnectionproviderconnectionhelper, suppliedconnectionproviderconnectionhelper, throwable, throwable

The Hibernate SuppliedConnectionProviderConnectionHelper.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.tool.hbm2ddl;

import java.sql.Connection;
import java.sql.SQLException;
import org.hibernate.engine.jdbc.spi.SqlExceptionHelper;
import org.hibernate.service.jdbc.connections.spi.ConnectionProvider;

/**
 * A {@link ConnectionHelper} implementation based on a provided
 * {@link ConnectionProvider}.  Essentially, ensures that the connection
 * gets cleaned up, but that the provider itself remains usable since it
 * was externally provided to us.
 *
 * @author Steve Ebersole
 */
class SuppliedConnectionProviderConnectionHelper implements ConnectionHelper {
	private ConnectionProvider provider;
	private Connection connection;
	private boolean toggleAutoCommit;

	public SuppliedConnectionProviderConnectionHelper(ConnectionProvider provider) {
		this.provider = provider;
	}

	public void prepare(boolean needsAutoCommit) throws SQLException {
		connection = provider.getConnection();
		toggleAutoCommit = needsAutoCommit && !connection.getAutoCommit();
		if ( toggleAutoCommit ) {
			try {
				connection.commit();
			}
			catch( Throwable ignore ) {
				// might happen with a managed connection
			}
			connection.setAutoCommit( true );
		}
	}

	public Connection getConnection() throws SQLException {
		return connection;
	}

	public void release() throws SQLException {
		// we only release the connection
		if ( connection != null ) {
			new SqlExceptionHelper().logAndClearWarnings( connection );
			if ( toggleAutoCommit ) {
				connection.setAutoCommit( false );
			}
			provider.closeConnection( connection );
			connection = null;
		}
	}
}

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