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JDBC4SuspendableXAConnection.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.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;

import com.mysql.jdbc.ConnectionImpl;

00038 public class JDBC4SuspendableXAConnection extends SuspendableXAConnection {

      private Map<StatementEventListener, StatementEventListener> statementEventListeners;

      public JDBC4SuspendableXAConnection(ConnectionImpl connection) throws SQLException {
            super(connection);
            
            this.statementEventListeners = new HashMap<StatementEventListener, StatementEventListener>();
      }
      
00048       public synchronized void close() throws SQLException {
            super.close();
            
            if (this.statementEventListeners != null) {
                  this.statementEventListeners.clear();
                  
                  this.statementEventListeners = null;
            }
      }
      
      
      /**
       * Registers a <code>StatementEventListener</code> with this <code>PooledConnection</code> object.  Components that 
       * wish to be notified when  <code>PreparedStatement</code>s created by the
     * connection are closed or are detected to be invalid may use this method 
     * to register a <code>StatementEventListener</code> with this <code>PooledConnection</code> object.
       * <p>
       * @param listener      an component which implements the <code>StatementEventListener</code> 
       *                            interface that is to be registered with this <code>PooledConnection</code> object
       * <p>
       * @since 1.6
       */
00070       public void addStatementEventListener(StatementEventListener listener) {
            synchronized (this.statementEventListeners) {
                  this.statementEventListeners.put(listener, listener);
            }
      }
      
      /**
       * Removes the specified <code>StatementEventListener</code> from the list of 
       * components that will be notified when the driver detects that a 
       * <code>PreparedStatement</code> has been closed or is invalid.
       * <p> 
       * @param listener      the component which implements the
       *                            <code>StatementEventListener</code> interface that was previously 
       *                            registered with this <code>PooledConnection</code> object
       * <p>
       * @since 1.6
       */
00087       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);
                  }
            }
      }
}

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