001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 *
019 */
020
021 package org.apache.directory.server.ntp.protocol;
022
023
024 import org.apache.directory.server.ntp.NtpService;
025 import org.apache.directory.server.ntp.messages.NtpMessage;
026 import org.apache.directory.server.ntp.service.NtpServiceImpl;
027 import org.apache.mina.core.service.IoHandlerAdapter;
028 import org.apache.mina.core.session.IoSession;
029 import org.slf4j.Logger;
030 import org.slf4j.LoggerFactory;
031
032
033 /**
034 * The NTP protocol handler. It implements the {@link IoHandler#messageReceived} method,
035 * which returns the NTP reply. The {@link IoHandler#exceptionCaught} is also implemented,
036 * all the other methods are handled by the {@link IoHandlerAdapter} class.<br/>
037 *
038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039 * @version $Rev: 725712 $, $Date: 2008-12-11 16:32:04 +0100 (Jeu, 11 déc 2008) $
040 */
041 public class NtpProtocolHandler extends IoHandlerAdapter
042 {
043 /** the log for this class */
044 private static final Logger log = LoggerFactory.getLogger( NtpProtocolHandler.class );
045
046 /** The NtpService instance */
047 private NtpService ntpService = new NtpServiceImpl();
048
049
050 /**
051 * {@inheritDoc}
052 */
053 public void exceptionCaught( IoSession session, Throwable cause )
054 {
055 log.error( session.getRemoteAddress() + " EXCEPTION", cause );
056 session.close( true );
057 }
058
059
060 /**
061 * {@inheritDoc}
062 */
063 public void messageReceived( IoSession session, Object message )
064 {
065 if ( log.isDebugEnabled() )
066 {
067 log.debug( "{} RCVD: {}", session.getRemoteAddress(), message );
068 }
069
070 NtpMessage reply = ntpService.getReplyFor( ( NtpMessage ) message );
071
072 session.write( reply );
073 }
074 }