/*
* Copyright 2002-2007 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 javax.sql.DataSource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
/**
* Subclass of LocalDataSourceConnectionProvider that returns a
* transaction-aware proxy for the exposed DataSource. Used if
* LocalSessionFactoryBean's "useTransactionAwareDataSource" flag is on.
*
* @author Juergen Hoeller
* @since 1.2
* @see LocalSessionFactoryBean#setUseTransactionAwareDataSource
*/
public class TransactionAwareDataSourceConnectionProvider extends LocalDataSourceConnectionProvider {
/**
* Return a TransactionAwareDataSourceProxy for the given DataSource,
* provided that it isn't a TransactionAwareDataSourceProxy already.
*/
protected DataSource getDataSourceToUse(DataSource originalDataSource) {
if (originalDataSource instanceof TransactionAwareDataSourceProxy) {
return originalDataSource;
}
return new TransactionAwareDataSourceProxy(originalDataSource);
}
/**
* This implementation returns <code>true</code>: We can guarantee
* to receive the same Connection within a transaction, as we are
* exposing a TransactionAwareDataSourceProxy.
*/
public boolean supportsAggressiveRelease() {
return true;
}
}