Spring Framework example source code file (LocalDataSourceConnectionProvider.java)

This example Spring Framework source code file (LocalDataSourceConnectionProvider.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

connection, connection, connectionprovider, datasource, datasource, hibernateexception, hibernateexception, jdbc, localdatasourceconnectionprovider, localsessionfactorybean, no, sql, sqlexception, sqlexception, util

The Spring Framework LocalDataSourceConnectionProvider.java source code

/*
 * Copyright 2002-2008 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.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.hibernate.HibernateException;
import org.hibernate.connection.ConnectionProvider;
import org.hibernate.util.JDBCExceptionReporter;

/**
 * Hibernate connection provider for local DataSource instances
 * in an application context. This provider will be used if
 * LocalSessionFactoryBean's "dataSource" property is set
 * without a Hibernate TransactionManagerLookup.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see LocalSessionFactoryBean#setDataSource
 */
public class LocalDataSourceConnectionProvider implements ConnectionProvider {

	private DataSource dataSource;

	private DataSource dataSourceToUse;


	public void configure(Properties props) throws HibernateException {
		this.dataSource = LocalSessionFactoryBean.getConfigTimeDataSource();
		// absolutely needs thread-bound DataSource to initialize
		if (this.dataSource == null) {
			throw new HibernateException("No local DataSource found for configuration - " +
			    "'dataSource' property must be set on LocalSessionFactoryBean");
		}
		this.dataSourceToUse = getDataSourceToUse(this.dataSource);
	}

	/**
	 * Return the DataSource to use for retrieving Connections.
	 * <p>This implementation returns the passed-in DataSource as-is.
	 * @param originalDataSource the DataSource as configured by the user
	 * on LocalSessionFactoryBean
	 * @return the DataSource to actually retrieve Connections from
	 * (potentially wrapped)
	 * @see LocalSessionFactoryBean#setDataSource
	 */
	protected DataSource getDataSourceToUse(DataSource originalDataSource) {
		return originalDataSource;
	}

	/**
	 * Return the DataSource that this ConnectionProvider wraps.
	 */
	public DataSource getDataSource() {
		return dataSource;
	}

	/**
	 * This implementation delegates to the underlying DataSource.
	 * @see javax.sql.DataSource#getConnection()
	 */
	public Connection getConnection() throws SQLException {
		try {
			return this.dataSourceToUse.getConnection();
		}
		catch (SQLException ex) {
			JDBCExceptionReporter.logExceptions(ex);
			throw ex;
		}
	}

	/**
	 * This implementation simply calls <code>Connection.close.
	 * @see java.sql.Connection#close()
	 */
	public void closeConnection(Connection con) throws SQLException {
		try {
			con.close();
		}
		catch (SQLException ex) {
			JDBCExceptionReporter.logExceptions(ex);
			throw ex;
		}
	}

	/**
	 * This implementation does nothing:
	 * We're dealing with an externally managed DataSource.
	 */
	public void close() {
	}

	/**
	 * This implementation returns <code>false: We cannot guarantee
	 * to receive the same Connection within a transaction, not even when
	 * dealing with a JNDI DataSource.
	 */
	public boolean supportsAggressiveRelease() {
		return false;
	}

}