com.clustercontrol.port.protocol.ReachAddressNTP.java Source code

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Here is the source code for com.clustercontrol.port.protocol.ReachAddressNTP.java

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/*
    
 Copyright (C) 2006 NTT DATA Corporation
    
 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.
    
 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.
    
 */

package com.clustercontrol.port.protocol;

import java.io.IOException;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.net.ntp.NTPUDPClient;
import org.apache.commons.net.ntp.TimeInfo;

import com.clustercontrol.util.HinemosTime;
import com.clustercontrol.util.MessageConstant;

/**
 * NTP?????????
 * 
 * @version 4.0.0
 * @since 4.0.0
 */
public class ReachAddressNTP extends ReachAddressProtocol {

    private static Log m_log = LogFactory.getLog(ReachAddressNTP.class);

    /**
     * NTP????????
     * 
     * @param addressText
     * @return NTP
     */
    @Override
    protected boolean isRunning(String addressText) {

        m_message = "";
        m_messageOrg = "";
        m_response = -1;

        boolean isReachable = false;

        try {
            long start = 0; // 
            long end = 0; // 
            boolean retry = true; // ????(true:??false:???)

            StringBuffer bufferOrg = new StringBuffer(); // 
            String result = "";

            InetAddress address = InetAddress.getByName(addressText);

            bufferOrg.append("Monitoring the NTP Service of " + address.getHostName() + "["
                    + address.getHostAddress() + "]:" + m_portNo + ".\n\n");

            NTPUDPClient client = new NTPUDPClient();
            TimeInfo time = null;

            for (int i = 0; i < m_sentCount && retry; i++) {
                try {
                    bufferOrg.append(HinemosTime.getDateString() + " Tried to Connect: ");
                    client.setDefaultTimeout(m_timeout);

                    start = HinemosTime.currentTimeMillis();
                    time = client.getTime(address, m_portNo);
                    end = HinemosTime.currentTimeMillis();

                    m_response = end - start;

                    if (time != null) {
                        if (m_response > 0) {
                            if (m_response < m_timeout) {
                                result = result + ("\n" + "Response Time = " + m_response + "ms");
                            } else {
                                m_response = m_timeout;
                                result = result + ("\n" + "Response Time = " + m_response + "ms");
                            }
                        } else {
                            result = result + ("\n" + "Response Time < 1ms");
                        }
                        result = new Date(time.getReturnTime()).toString();
                        retry = false;
                        isReachable = true;
                    } else {
                        result = "failed to get time ";
                        retry = false;
                        isReachable = false;
                    }

                } catch (SocketException e) {
                    result = (e.getMessage() + "[SocketException]");
                    retry = true;
                    isReachable = false;
                } catch (IOException e) {
                    result = (e.getMessage() + "[IOException]");
                    retry = true;
                    isReachable = false;
                } finally {
                    bufferOrg.append(result + "\n");
                    if (client.isOpen()) {
                        client.close();
                    }
                }

                if (i < m_sentCount - 1 && retry) {
                    try {
                        Thread.sleep(m_sentInterval);
                    } catch (InterruptedException e) {
                        break;
                    }
                }
            }

            m_message = result + "(NTP/" + m_portNo + ")";
            m_messageOrg = bufferOrg.toString();
            return isReachable;
        } catch (UnknownHostException e) {
            m_log.debug("isRunning(): " + MessageConstant.MESSAGE_FAIL_TO_EXECUTE_TO_CONNECT.getMessage()
                    + e.getMessage());

            m_message = MessageConstant.MESSAGE_FAIL_TO_EXECUTE_TO_CONNECT.getMessage() + " (" + e.getMessage()
                    + ")";

            return false;
        }
    }
}