com.mysql.jdbc.jdbc2.optional.JDBC4MysqlPooledConnection Maven / Gradle / Ivy

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MySQL JDBC Type 4 driver
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/*
 Copyright (c) 2007, 2010, 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 FLOSS 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.jdbc2.optional;

import java.sql.SQLException;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.sql.StatementEvent;
import javax.sql.StatementEventListener;


/**
 * This class is used to wrap and return a physical connection within a logical
 * handle. It also registers and notifies ConnectionEventListeners of any
 * ConnectionEvents
 * 
 * @see javax.sql.PooledConnection
 * @see org.gjt.mm.mysql.jdbc2.optional.LogicalHandle
 * @author Todd Wolff 
 */
public class JDBC4MysqlPooledConnection extends MysqlPooledConnection {

	private Map statementEventListeners;

	public JDBC4MysqlPooledConnection(com.mysql.jdbc.Connection connection) {
		super(connection);
		
		this.statementEventListeners = new HashMap();
	}
	
	public synchronized void close() throws SQLException {
		super.close();
		
		if (this.statementEventListeners != null) {
			this.statementEventListeners.clear();
			
			this.statementEventListeners = null;
		}
	}
	
	
	/**
	 * Registers a StatementEventListener with this PooledConnection object.  Components that 
	 * wish to be notified when  PreparedStatements created by the
     * connection are closed or are detected to be invalid may use this method 
     * to register a StatementEventListener with this PooledConnection object.
	 * 
	 * @param listener	an component which implements the StatementEventListener 
	 * 					interface that is to be registered with this PooledConnection object
	 * 

	 * @since 1.6
	 */
	public void addStatementEventListener(StatementEventListener listener) {
		synchronized (this.statementEventListeners) {
			this.statementEventListeners.put(listener, listener);
		}
	}
	
	/**
	 * Removes the specified StatementEventListener from the list of 
	 * components that will be notified when the driver detects that a 
	 * PreparedStatement has been closed or is invalid.
	 * 
 
	 * @param listener	the component which implements the
	 * 					StatementEventListener interface that was previously 
	 * 					registered with this PooledConnection object
	 * 
	 * @since 1.6
	 */
	public void removeStatementEventListener(StatementEventListener listener) {
		synchronized (this.statementEventListeners) {
			this.statementEventListeners.remove(listener);
		}
	}
	
	void fireStatementEvent(StatementEvent event) throws SQLException {
		synchronized (this.statementEventListeners) {
			for (StatementEventListener listener : this.statementEventListeners.keySet()) {
				listener.statementClosed(event);
			}
		}
	}
}