| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.ntp; |
| |
| |
| import java.io.IOException; |
| |
| import org.apache.directory.server.ntp.protocol.NtpProtocolCodecFactory; |
| import org.apache.directory.server.ntp.protocol.NtpProtocolHandler; |
| import org.apache.directory.server.protocol.shared.AbstractProtocolService; |
| import org.apache.directory.server.protocol.shared.transport.Transport; |
| import org.apache.directory.server.protocol.shared.transport.UdpTransport; |
| import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder; |
| import org.apache.mina.core.service.IoAcceptor; |
| import org.apache.mina.core.service.IoHandler; |
| import org.apache.mina.filter.codec.ProtocolCodecFilter; |
| import org.apache.mina.transport.socket.DatagramAcceptor; |
| import org.apache.mina.transport.socket.DatagramSessionConfig; |
| import org.apache.mina.transport.socket.SocketAcceptor; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * Contains the configuration parameters for the NTP protocol provider. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class NtpServer extends AbstractProtocolService |
| { |
| /** logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( NtpServer.class ); |
| |
| /** |
| * The default IP port. |
| */ |
| private static final int IP_PORT_DEFAULT = 123; |
| |
| /** The default service pid. */ |
| private static final String SERVICE_PID_DEFAULT = "org.apache.directory.server.ntp"; |
| |
| /** The default service name. */ |
| private static final String SERVICE_NAME_DEFAULT = "ApacheDS NTP Service"; |
| |
| |
| /** |
| * Creates a new instance of NtpConfiguration. |
| */ |
| public NtpServer() |
| { |
| super.setServiceId( SERVICE_PID_DEFAULT ); |
| super.setServiceName( SERVICE_NAME_DEFAULT ); |
| } |
| |
| |
| /** |
| * Start the NTPServer. We initialize the Datagram and Socket, if necessary. |
| * |
| * Note that we don't have any filter in the chain, everything is done |
| * in the handler. |
| * @throws IOException if there are issues binding |
| */ |
| public void start() throws IOException |
| { |
| IoHandler ntpProtocolHandler = new NtpProtocolHandler(); |
| |
| // Create the chain for the NTP server |
| DefaultIoFilterChainBuilder ntpChain = new DefaultIoFilterChainBuilder(); |
| ntpChain.addLast( "codec", new ProtocolCodecFilter( NtpProtocolCodecFactory.getInstance() ) ); |
| |
| if ( ( transports == null ) || transports.isEmpty() ) |
| { |
| // Default to UDP with port 123 |
| // We have to create a DatagramAcceptor |
| UdpTransport transport = new UdpTransport( IP_PORT_DEFAULT ); |
| setTransports( transport ); |
| |
| DatagramAcceptor acceptor = transport.getAcceptor(); |
| |
| // Set the handler |
| acceptor.setHandler( ntpProtocolHandler ); |
| |
| // Allow the port to be reused even if the socket is in TIME_WAIT state |
| acceptor.getSessionConfig().setReuseAddress( true ); |
| |
| // Inject the chain |
| acceptor.setFilterChainBuilder( ntpChain ); |
| |
| // Start the listener |
| acceptor.bind(); |
| } |
| else |
| { |
| for ( Transport transport : transports ) |
| { |
| IoAcceptor acceptor = transport.getAcceptor(); |
| |
| // Set the handler |
| acceptor.setHandler( ntpProtocolHandler ); |
| |
| if ( transport instanceof UdpTransport ) |
| { |
| // Allow the port to be reused even if the socket is in TIME_WAIT state |
| ( ( DatagramSessionConfig ) acceptor.getSessionConfig() ).setReuseAddress( true ); |
| } |
| else |
| { |
| // Disable the disconnection of the clients on unbind |
| acceptor.setCloseOnDeactivation( false ); |
| |
| // Allow the port to be reused even if the socket is in TIME_WAIT state |
| ( ( SocketAcceptor ) acceptor ).setReuseAddress( true ); |
| |
| // No Nagle's algorithm |
| ( ( SocketAcceptor ) acceptor ).getSessionConfig().setTcpNoDelay( true ); |
| } |
| |
| // Inject the chain |
| acceptor.setFilterChainBuilder( ntpChain ); |
| |
| // Start the listener |
| acceptor.bind(); |
| } |
| } |
| |
| LOG.info( "NTP server started." ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void stop() |
| { |
| for ( Transport transport : getTransports() ) |
| { |
| IoAcceptor acceptor = transport.getAcceptor(); |
| |
| if ( acceptor != null ) |
| { |
| acceptor.dispose(); |
| } |
| } |
| |
| LOG.info( "NTP Server stopped." ); |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( "NTPServer[" ).append( getServiceName() ).append( "], listening on :" ).append( '\n' ); |
| |
| if ( getTransports() != null ) |
| { |
| for ( Transport transport : getTransports() ) |
| { |
| sb.append( " " ).append( transport ).append( '\n' ); |
| } |
| } |
| |
| return sb.toString(); |
| } |
| } |