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/*
* Copyright (c) 2007, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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 General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.jdbc;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.util.Properties;
/**
* Classes that implement this interface and provide a no-args constructor can be used by the driver to store and retrieve client information and/or labels.
*
* The driver will create an instance for each Connection instance, and call initialize() once and only once. When the connection is closed, destroy() will be
* called, and the provider is expected to clean up any resources at this time.
*/
public interface ClientInfoProvider {
/**
* Called once by the driver when it needs to configure the provider.
*
* @param conn
* the connection that the provider belongs too.
* @param configurationProps
* a java.util.Properties instance that contains
* configuration information for the connection.
* @throws SQLException
* if initialization fails.
*/
void initialize(java.sql.Connection conn, Properties configurationProps) throws SQLException;
/**
* Called once by the driver when the connection this provider instance
* belongs to is being closed.
*
* Implementations are expected to clean up and resources at this point
* in time.
*
* @throws SQLException
* if an error occurs.
*/
void destroy() throws SQLException;
/**
* Returns the client info for the connection that this provider
* instance belongs to. The connection instance is passed as an argument
* for convenience's sake.
*
* Providers can use the connection to communicate with the database,
* but it will be within the scope of any ongoing transactions, so therefore
* implementations should not attempt to change isolation level, autocommit settings
* or call rollback() or commit() on the connection.
*
* @param conn
* connection object
* @throws SQLException
* if an error occurs
* @return client info as Properties
* @see java.sql.Connection#getClientInfo()
*/
Properties getClientInfo(java.sql.Connection conn) throws SQLException;
/**
* Returns the client info for the connection that this provider
* instance belongs to. The connection instance is passed as an argument
* for convenience's sake.
*
* Providers can use the connection to communicate with the database,
* but it will be within the scope of any ongoing transactions, so therefore
* implementations should not attempt to change isolation level, autocommit settings
* or call rollback() or commit() on the connection.
*
* @param conn
* connection object
* @param name
* property name
* @throws SQLException
* if an error occurs
* @return the client info by given property name
* @see java.sql.Connection#getClientInfo(java.lang.String)
*/
String getClientInfo(java.sql.Connection conn, String name) throws SQLException;
/**
* Sets the client info for the connection that this provider
* instance belongs to. The connection instance is passed as an argument
* for convenience's sake.
*
* Providers can use the connection to communicate with the database,
* but it will be within the scope of any ongoing transactions, so therefore
* implementations should not attempt to change isolation level, autocommit settings
* or call rollback() or commit() on the connection.
*
* @param conn
* connection object
* @param properties
* Properties object
* @throws SQLClientInfoException
* if an error occurs
*
* @see java.sql.Connection#setClientInfo(java.util.Properties)
*/
void setClientInfo(java.sql.Connection conn, Properties properties) throws SQLClientInfoException;
/**
* Sets the client info for the connection that this provider
* instance belongs to. The connection instance is passed as an argument
* for convenience's sake.
*
* Providers can use the connection to communicate with the database,
* but it will be within the scope of any ongoing transactions, so therefore
* implementations should not attempt to change isolation level, autocommit settings
* or call rollback() or commit() on the connection.
*
* @param conn
* connection object
* @param name
* property name
* @param value
* property value
* @throws SQLClientInfoException
* if an error occurs
*
* @see java.sql.Connection#setClientInfo(java.lang.String,java.lang.String)
*/
void setClientInfo(java.sql.Connection conn, String name, String value) throws SQLClientInfoException;
}
