Networking Thing

Main.java

import java.awt.Desktop;
import java.io.*;
import java.sql.Timestamp;
import java.util.ArrayList;

public class Main {
	
	public static boolean pinging = true;
	public static final long DELAY = 100;
	
	public static int countOccurences(String src, String token) {
		int count = 0, idx = 0;
		
		while(true) {
			idx = src.indexOf(token, idx);
			if(idx == -1)
				break;
			idx++;
			count++;
		}
		
		return count;
	}
	
	public static String getField(String src, String token, String delims, boolean includeEnd) {
		int loc = src.indexOf(token);
		
		if(loc == -1) {
			return "0";
		}
		
		String field = "";
		for(int i = loc + token.length(); i < src.length(); i++) {
			char c = src.charAt(i);
			
			boolean bad = (delims.indexOf(c) != -1);
			if(!bad || (bad && includeEnd))
				field += c;
			if(bad) 
				break;
		}
		return field;
	}
	
	public static String execProcess(ProcessBuilder procBuilder) throws IOException, InterruptedException {
		Process proc = procBuilder.start();
		BufferedReader br = new BufferedReader(new InputStreamReader(proc.getInputStream()));
		
		String output = "";
		String line = null;
		while((line = br.readLine()) != null) {
			output += line + '\n';
		}
		
		return output;
	}
	
	public static void main(String[] args) throws IOException, InterruptedException {
		File logFileName = new File("log-" + System.currentTimeMillis() + ".txt");
		
		PrintStream log = new PrintStream(logFileName);
		
		ProcessBuilder procBuilder = new ProcessBuilder();
		procBuilder.command("cmd.exe", "/c", "ping 1.1.1.1");
		
		Thread cli = new Thread() {
			public void run() {
				System.out.println("Press ENTER to stop");
				
				try { System.in.read(); } catch (Exception iDontCare) {};
				
				System.out.println("Stopping...");
				pinging = false;
				
			}
		};
		
		cli.start();
		
		int samples = 0;
		int longRunAvg = 0;
		int longRunSent = 0;
		int longRunRecv = 0;
		
		ArrayList<Timestamp> failures = new ArrayList<Timestamp>();
		
		long nextSleep = System.currentTimeMillis() + DELAY;
		while(pinging) {
			// basically all we need to do is get our summary from pinging
			String result = execProcess(procBuilder);
			
			Timestamp now = new Timestamp(System.currentTimeMillis());
			log.print("[" + now + "]\t");
			
			int avg = 0, sent = 0, recv = 0;
			
			try {
				avg = Integer.valueOf(getField(result, "Average = ", "ms\n", false));
				sent = Integer.valueOf(getField(result, "Sent = ", ",", false));
			} catch (Exception e) {
				e.printStackTrace();
				System.out.println("Returned result:\n" + result);
			}
			
			recv = countOccurences(result, "TTL");
			
			
			if(recv != sent || avg == 0)
				failures.add(now);
			
			if(avg != 0) {
				longRunAvg += avg;
				samples++;
			}
			
			longRunSent += sent;
			longRunRecv += recv;
			
			log.println("Avg " + avg + "ms\tSuccess Rate " + recv + "/" + sent);
			
			long duration = nextSleep - System.currentTimeMillis();
			if(duration > 0)
				Thread.sleep(duration);
			nextSleep = System.currentTimeMillis() + DELAY;
		}
	
		if(samples == 0)
			samples = 1;
		
		log.println("Long run ping: " + longRunAvg / samples + "ms");
		log.println("Long run success rate: " + longRunRecv + "/" + longRunSent + " (" + 100.0 * longRunRecv/longRunSent + "%)");
		
		if(failures.size() == 0) {
			log.println("No failures, hooray!");
		} else {
			log.println("Failure timestamps:");
			for(Timestamp fail : failures) {
				log.println("\t"+fail);
			}
		}
		
		System.out.println("Opening log file...");
		Desktop.getDesktop().open(logFileName);
	}

}