org.hibernate.engine.jdbc.connections.spi.ConnectionProvider Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. 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 Inc.
*
* 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.engine.jdbc.connections.spi;
import java.sql.Connection;
import java.sql.SQLException;
import org.hibernate.service.Service;
import org.hibernate.service.spi.Wrapped;
/**
* A contract for obtaining JDBC connections.
*
* Implementors might also implement connection pooling.
*
* Implementors should provide a public default constructor.
*
* @author Gavin King
* @author Steve Ebersole
*/
public interface ConnectionProvider extends Service, Wrapped {
/**
* Obtains a connection for Hibernate use according to the underlying strategy of this provider.
*
* @return The obtained JDBC connection
*
* @throws SQLException Indicates a problem opening a connection
* @throws org.hibernate.HibernateException Indicates a problem otherwise obtaining a connection.
*/
public Connection getConnection() throws SQLException;
/**
* Release a connection from Hibernate use.
*
* @param conn The JDBC connection to release
*
* @throws SQLException Indicates a problem closing the connection
* @throws org.hibernate.HibernateException Indicates a problem otherwise releasing a connection.
*/
public void closeConnection(Connection conn) throws SQLException;
/**
* Does this connection provider support aggressive release of JDBC
* connections and re-acquisition of those connections (if need be) later?
*
* This is used in conjunction with {@link org.hibernate.cfg.Environment#RELEASE_CONNECTIONS}
* to aggressively release JDBC connections. However, the configured ConnectionProvider
* must support re-acquisition of the same underlying connection for that semantic to work.
*
* Typically, this is only true in managed environments where a container
* tracks connections by transaction or thread.
*
* Note that JTA semantic depends on the fact that the underlying connection provider does
* support aggressive release.
*
* @return {@code true} if aggressive releasing is supported; {@code false} otherwise.
*/
public boolean supportsAggressiveRelease();
}