网站监控系统

　　最近开始做一个网站监控系统，涉及的功能包括：站点监控、服务器性能监控、服务监控等。站点监控的类型包括：HTTP/HTTPS、PING、FTP、DNS、TCP、UDP、SMTP。可用率和响应时间是两个重要的性能指标。

　　其实有些实现还是比较简单的，只要模拟连接服务器就可以了。

　　先贴一下FTP、SMTP的实现代码（只是简单实现，还有深入的东西要去考虑）

FTP

import sun.net.ftp.*;
public class FtpTool{
/*
 * 可用率
 * 响应时间 
 *
 * 
 * */
	public static boolean connectServer(String host,int port,String username,String password)
	                                                                      throws Exception{
		boolean isSuccess = false;
		try {
			FtpClient ftpclient = new FtpClient();
			ftpclient.openServer(host, port);
			ftpclient.login(username, password);
		    isSuccess = true;	
		} catch (Exception e) {
			throw new Exception("Connect ftp server error:"+e.getMessage());
		}
		
		return isSuccess;
	}
	public static void main(String[] args) {
		long start = System.currentTimeMillis();
		long end=0;
		long response=0;
		try {
			boolean isSuccess=FtpTool.connectServer("www.linuxidc.com", 21, "www.linuxidc.com", "www.muu.cc");
			//boolean isSuccess=FtpTool.connectServer("218.4.56.235", 21, "anonymous", "");
			end = System.currentTimeMillis();
			response = end-start;
			System.out.println("Connection successful");
		    System.out.println("响应时间："+response+"ms");	
		} catch (Exception e) {
			end = System.currentTimeMillis();
			response = end-start;
			System.out.println(e.getMessage());
			System.out.println("响应时间："+response+"ms");
		}

	}

}

SMTP

import sun.net.smtp.*;
public class SmtpTool {

	public static boolean connectServer(String mailhost,int port)throws Exception{
		boolean isSuccess=false;
		SmtpClient smtpclient;
		try {
			smtpclient = new SmtpClient(mailhost);
			smtpclient.openServer(mailhost, port);
		} catch (Exception e) {
			throw new Exception("Connect server error:"+e.getMessage());
		}
		
		isSuccess=true;
		return isSuccess;
	}
	public static void main(String[] args) {
		long start = System.currentTimeMillis();
		long end=0;
		long response=0;
		try {
			SmtpTool.connectServer("smtp.sina.com.cn",25);
			end=System.currentTimeMillis();
			response=end-start;
			System.out.println("Connection successfull");
			System.out.println("响应时间："+response+"ms");
		} catch (Exception e) {
			end=System.currentTimeMillis();
			response=end-start;
			System.out.println("Connect server error:"+e.getMessage());
			System.out.println("响应时间："+response+"ms");
		}

	}

}

未完待续 简单记录

参考论文：http://wenku.baidu.com/view/c79b5a2c453610661ed9f4b9.html