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/*
* Copyright 2011 Vaadin Ltd.
*
* 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 com.vaadin.data.util.sqlcontainer.connection;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.SQLException;
/**
* Interface for implementing connection pools to be used with SQLContainer.
*/
public interface JDBCConnectionPool extends Serializable {
/**
* Retrieves a connection.
*
* @return a usable connection to the database
* @throws SQLException
*/
public Connection reserveConnection() throws SQLException;
/**
* Releases a connection that was retrieved earlier.
*
* Note that depending on implementation, the transaction possibly open in
* the connection may or may not be rolled back.
*
* @param conn
* Connection to be released
*/
public void releaseConnection(Connection conn);
/**
* Destroys the connection pool: close() is called an all the connections in
* the pool, whether available or reserved.
*
* This method was added to fix PostgreSQL -related issues with connections
* that were left hanging 'idle'.
*/
public void destroy();
}
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