/*
 * 文件：UAS5000SyslogReceiver.java.java
 * 功能：SYSLOG消息處理類
 * 作者：茹海燕
 * 時間：2003年06月20日
 * 項目：ZXNM01數據網絡管理
 * 版權：深圳市中興通訊股份有限公司網絡事業部
 */

package com.zte.e10.ems.uas.zteuas.config;

import java.net.*;
import java.util.*;
import java.io.*;

import com.adventnet.nms.topodb.SnmpNode;
import com.adventnet.nms.util.*;
import com.adventnet.snmp.beans.*;
import com.adventnet.snmp.mibs.MibOperations;
import com.adventnet.snmp.snmp2.*;

import com.zte.e10.ems.general.PubTools;
import com.zte.e10.ems.mibdata.zteuas.*;
import com.zte.e10.ems.uas.UASConst;
import com.zte.e10.ems.uas.zteuas.discovery.discoveryconst;

/**
 * UDP數據包監聽，接收之后，構造呈SYSLOG信息，寫入數據庫
 */
 public class UAS5000SyslogReceiver extends Uas5000ConfigBase implements java.lang.Runnable
{
	private static String debugTitle = "<Syslog.UAS5000SyslogReceiver>";
	private SyslogInfo syslog = null;

	public static void main(String[] args)
	{
		UAS5000SyslogReceiver dc = new UAS5000SyslogReceiver();
		dc.listen();		
	}
	
	private void listen()
	{
		InetAddress addr = null;
		DatagramSocket ds = null;
		try
		{
			ds = new DatagramSocket(SyslogInfo.SYSLOG_PORT);
		}
		catch(Exception ex)
		{
			PubTools.DebugLog(debugTitle, "construct a new DatagramSocket error. " + ex);
			ex.printStackTrace();
			return;
		}
		
		byte[] buffer = new byte[SyslogInfo.UDP_DATA_LENGTH];
		DatagramPacket dp = new DatagramPacket(buffer,SyslogInfo.UDP_DATA_LENGTH);
		String data = "";
		while(true)
		{
			try
			{
				ds.receive(dp);
			
				data = new String(dp.getData());
				String ip = dp.getAddress().getHostAddress();
				String moname = discoveryconst.NENAME_PREFIX + ip; 
				PubTools.DebugLog(debugTitle, "receive data : " + data);	
				if (data.length() != 0)
				{
					syslog = createSysLogInfo(data);
					if (syslog == null)
					{
						PubTools.DebugLog(debugTitle, "createSysLogInfo failed! the info is " + data );	
						break;
					}				
					else if (!super.db.addSysLogInfotoDb(moname,syslog))
					{
						PubTools.DebugLog(debugTitle,
								  "addSysLogInfotoDb failed! the syslog is " + syslog.toString() );	
						return;
					}
				}
			}
			catch(Exception ex)
			{
				PubTools.DebugLog(debugTitle, "receive a new datagram packet error. " + ex);
				ex.printStackTrace();
				return;
			}
		}				
	}

    /**
     * 構造SyslogInfo類
     * @see com.zte.e10.ems.mibdata.zteuas.SyslogInfo
     */
    private SyslogInfo createSysLogInfo(String info)
    {
    	int index1 = info.indexOf("<");
    	int index2 = info.indexOf(">");
    	if ((index1 < 0) || (index2 < 0) || (index1 >= index2))
	{
		PubTools.DebugLog(debugTitle,
				  "createSysLogInfo failed! the info error: " + info);	
		return null;
	}
    	
    	String temp = info.substring(index1+1, index2);
    	SyslogInfo log = new SyslogInfo();
    	try
    	{
    		int number = Integer.parseInt(temp);
    		if (number<0)
		{
			PubTools.DebugLog(debugTitle,
					  "createSysLogInfo failed! the number error: " + number);	
			return null;
		}
		log.time = new Date().getTime();
		log.moduleNo = number/SyslogInfo.DIVISOR;
		log.severityLevel = number%SyslogInfo.DIVISOR;
    		log.information = info.substring(index2+1).trim();
    		//PubTools.DebugLog(debugTitle, "SysLogInfo: " + log.toString());
    	}
    	catch(Exception ex)
    	{
		PubTools.DebugLog(debugTitle, "createSysLogInfo() failed. " + ex);
		ex.printStackTrace();
		return null;
    	}
    	return log;
    }

    /**
     * 線程入口,啟動一個線程監聽。
     */
    public void run()
    {
		UAS5000SyslogReceiver dc = new UAS5000SyslogReceiver();
		dc.listen();		
    }

}