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 021package org.apache.directory.server.ntp.protocol; 022 023 024import org.apache.directory.server.ntp.NtpService; 025import org.apache.directory.server.ntp.messages.NtpMessage; 026import org.apache.directory.server.ntp.service.NtpServiceImpl; 027import org.apache.mina.core.service.IoHandlerAdapter; 028import org.apache.mina.core.session.IoSession; 029import org.slf4j.Logger; 030import org.slf4j.LoggerFactory; 031 032 033/** 034 * The NTP protocol handler. It implements the {@link org.apache.mina.core.service.IoHandler#messageReceived} method, 035 * which returns the NTP reply. The {@link org.apache.mina.core.service.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 */ 040public class NtpProtocolHandler extends IoHandlerAdapter 041{ 042 /** the log for this class */ 043 private static final Logger LOG = LoggerFactory.getLogger( NtpProtocolHandler.class ); 044 045 /** The NtpService instance */ 046 private NtpService ntpService = new NtpServiceImpl(); 047 048 049 /** 050 * {@inheritDoc} 051 */ 052 @Override 053 public void exceptionCaught( IoSession session, Throwable cause ) 054 { 055 LOG.error( session.getRemoteAddress() + " EXCEPTION", cause ); 056 session.closeNow(); 057 } 058 059 060 /** 061 * {@inheritDoc} 062 */ 063 @Override 064 public void messageReceived( IoSession session, Object message ) 065 { 066 if ( LOG.isDebugEnabled() ) 067 { 068 LOG.debug( "{} RCVD: {}", session.getRemoteAddress(), message ); 069 } 070 071 NtpMessage reply = ntpService.getReplyFor( ( NtpMessage ) message ); 072 073 session.write( reply ); 074 } 075}