Java tutorial
/* * 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 static org.junit.Assert.assertTrue; import java.net.InetAddress; import java.util.concurrent.Executors; import org.apache.commons.net.ntp.NTPUDPClient; import org.apache.commons.net.ntp.TimeInfo; import org.apache.directory.server.protocol.shared.transport.TcpTransport; import org.apache.directory.server.protocol.shared.transport.UdpTransport; import org.apache.mina.filter.executor.ExecutorFilter; import org.apache.mina.util.AvailablePortFinder; import org.junit.After; import org.junit.Before; import org.junit.Ignore; import org.junit.Test; /** * An test testing the Network Time Protocol (NTP). * * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> */ public class NtpITest { private NtpServer ntpConfig; private int port; /** * Set up a partition for EXAMPLE.COM and enable the NTP service. The LDAP service is disabled. */ @Before public void setUp() throws Exception { ntpConfig = new NtpServer(); port = AvailablePortFinder.getNextAvailable(); TcpTransport tcpTransport = new TcpTransport(port); UdpTransport udpTransport = new UdpTransport(port); ntpConfig.setTransports(tcpTransport, udpTransport); ntpConfig.getDatagramAcceptor(udpTransport).getFilterChain().addLast("executor", new ExecutorFilter(Executors.newCachedThreadPool())); ntpConfig.getSocketAcceptor(tcpTransport).getFilterChain().addLast("executor", new ExecutorFilter(Executors.newCachedThreadPool())); ntpConfig.setEnabled(true); ntpConfig.start(); } /** * Tests to make sure NTP works when enabled in the server. * * @throws Exception if there are errors */ @Test @Ignore // Fails with a timeout !!! public void testNtp() throws Exception { InetAddress host = InetAddress.getByName(null); NTPUDPClient ntp = new NTPUDPClient(); ntp.setDefaultTimeout(500000); long currentTime = System.currentTimeMillis(); TimeInfo timeInfo = ntp.getTime(host, port); long returnTime = timeInfo.getReturnTime(); assertTrue(Math.abs(currentTime - returnTime) < 1000); timeInfo.computeDetails(); String offsetMsg = "Expected offset in range (-1000, 1000), but was " + timeInfo.getOffset(); assertTrue(offsetMsg, -1000 < timeInfo.getOffset() && timeInfo.getOffset() < 1000); String delayMsg = "Expected delay in range [0, 1000), but was " + timeInfo.getOffset(); assertTrue(delayMsg, 0 <= timeInfo.getDelay() && timeInfo.getDelay() < 1000); } /** * Tear down. */ @After public void tearDown() throws Exception { ntpConfig.stop(); } }