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MySQL JDBC Type 4 driver

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/*
  Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/J is licensed under the terms of the GPLv2
  , 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 FOSS License Exception
  .

  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;

public interface LoadBalanceExceptionChecker extends Extension {

    /**
     * Invoked to determine whether or a given SQLException should
     * trigger a failover in a load-balanced deployment.
     * 
     * The driver will not pass in a Connection instance when calling init(), but it
     * will pass in the Properties, otherwise it acts like a normal Extension.
     * 
     * One instance of a handler *per* JDBC connection instance will be created. If
     * you need singleton-like behavior, you're on your own to provide it.
     * 
     * @param ex
     * @return true if the exception should trigger failover.
     */
    public boolean shouldExceptionTriggerFailover(SQLException ex);

}