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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.interceptors;
import java.sql.SQLException;
import java.sql.Savepoint;
import java.util.Properties;
import com.mysql.cj.MysqlConnection;
import com.mysql.cj.log.Log;
/**
* Implementors of this interface can be installed via the "connectionLifecycleInterceptors" configuration property and receive events and alter behavior of
* "lifecycle" methods on our connection implementation.
*
* The driver will create one instance of a given interceptor per-connection.
*/
public interface ConnectionLifecycleInterceptor {
/**
* Called once per connection that wants to use the extension
*
* The properties are the same ones passed in in the URL or arguments to
* Driver.connect() or DriverManager.getConnection().
*
* @param conn
* the connection for which this extension is being created
* @param props
* configuration values as passed to the connection. Note that
* in order to support javax.sql.DataSources, configuration properties specific
* to an interceptor must be passed via setURL() on the
* DataSource. Extension properties are not exposed via
* accessor/mutator methods on DataSources.
* @param log
* logger instance
* @return interceptor
*/
ConnectionLifecycleInterceptor init(MysqlConnection conn, Properties props, Log log);
/**
* Called by the driver when this extension should release any resources
* it is holding and cleanup internally before the connection is
* closed.
*/
void destroy();
/**
* Called when an application calls Connection.close(), before the driver
* processes its own internal logic for close.
*
* @throws SQLException
* if an error occurs
*/
void close() throws SQLException;
/**
* Called when an application calls Connection.commit(), before the
* driver processes its own internal logic for commit().
*
* Interceptors should return "true" if the driver should perform
* its own internal logic for commit(), or "false" if not.
*
* @return "true" if the driver should perform
* its own internal logic for commit(), or "false" if not.
*
* @throws SQLException
* if an error occurs
*/
boolean commit() throws SQLException;
/**
* Called when an application calls Connection.rollback(), before the
* driver processes its own internal logic for rollback().
*
* Interceptors should return "true" if the driver should perform
* its own internal logic for rollback(), or "false" if not.
*
* @return "true" if the driver should perform
* its own internal logic for rollback(), or "false" if not.
*
* @throws SQLException
* if an error occurs
*/
boolean rollback() throws SQLException;
/**
* Called when an application calls Connection.rollback(), before the
* driver processes its own internal logic for rollback().
*
* Interceptors should return "true" if the driver should perform
* its own internal logic for rollback(), or "false" if not.
*
* @param s
* savepoint
* @return "true" if the driver should perform
* its own internal logic for rollback(), or "false" if not.
*
* @throws SQLException
* if an error occurs
*/
boolean rollback(Savepoint s) throws SQLException;
/**
* Called when an application calls Connection.setAutoCommit(), before the
* driver processes its own internal logic for setAutoCommit().
*
* Interceptors should return "true" if the driver should perform
* its own internal logic for setAutoCommit(), or "false" if not.
*
* @param flag
* autocommit flag
* @return "true" if the driver should perform
* its own internal logic for setAutoCommit(), or "false" if not.
*
* @throws SQLException
* if an error occurs
*/
boolean setAutoCommit(boolean flag) throws SQLException;
/**
* Called when an application calls Connection.setCatalog() or Connection.setSchema(),
* before the driver processes its own internal logic for these methods.
*
* Interceptors should return "true" if the driver should perform its own internal logic
* for setCatalog() or setSchema(), or "false" if not.
*
* @param db
* database name
* @return "true" if the driver should perform
* its own internal logic for setCatalog() or setSchema(), or "false" if not.
*
* @throws SQLException
* if an error occurs
*/
boolean setDatabase(String db) throws SQLException;
/**
* Called when the driver has been told by the server that a transaction
* is now in progress (when one has not been currently in progress).
*
* @return true if transaction is in progress
*/
boolean transactionBegun();
/**
* Called when the driver has been told by the server that a transaction
* has completed, and no transaction is currently in progress.
*
* @return true if transaction is completed
*/
boolean transactionCompleted();
}
