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JDBC4ClientInfoProvider.java

/*
 Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  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 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.jdbc;

import java.sql.SQLException;
import java.sql.SQLClientInfoException;
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.
 *
 * @version $Id: $
 */
00045 public interface JDBC4ClientInfoProvider {
      /**
       * 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.
       */
      public 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.
       */
      public 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
       * @return 
       * @throws SQLException
       * 
       * @see java.sql.Connection#getClientInfo()
       */
      public 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
       * @return 
       * @throws SQLException
       * 
       * @see java.sql.Connection#getClientInfo(java.lang.String)
       */
      public 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
       * @return 
       * @throws SQLException
       * 
       * @see java.sql.Connection#setClientInfo(java.util.Properties)
       */
      public 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
       * @return 
       * @throws SQLException
       * 
       * @see java.sql.Connection#setClientInfo(java.lang.String,java.lang.String)
       */
      public void setClientInfo(java.sql.Connection conn, String name, String value) throws SQLClientInfoException;
}

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