Profiler.java

/*  
 *  ReActions, Minecraft bukkit plugin
 *  (c)2012-2017, fromgate, fromgate@gmail.com
 *  http://dev.bukkit.org/server-mods/reactions/
 *    
 *  This file is part of ReActions.
 *  
 *  ReActions 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, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ReActions 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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with ReActions.  If not, see <http://www.gnorg/licenses/>.
 * 
 */

package me.fromgate.reactions.util;

import me.fromgate.reactions.ReActions;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.CommandSender;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.scheduler.BukkitTask;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class Profiler {
    private static boolean active = false;
    private static List<ProfEl> list = new ArrayList<>();
    private static long tick_count;
    private static BukkitTask bt = null;
    private static String date_prefix;

    public static ProfEl startProfile(String process) {
        if (bt == null) return null;
        ProfEl pl = new ProfEl(process, tick_count);
        list.add(pl);
        return pl;
    }

    public static void stopProfile(ProfEl pl, String comment) {
        if (bt == null) return;
        pl.stopCount(comment);
    }

    public static void start(Long profilingduration, final CommandSender s) {
        if (active) {
            s.sendMessage(ChatColor.RED + "Profiling already started");
            return;
        }
        list.clear();
        Date dt = new Date();
        SimpleDateFormat ft = new SimpleDateFormat("yyyy-MM-ddd hh-mm-ss");
        date_prefix = ft.format(dt);
        startTicker();
        s.sendMessage(ChatColor.GOLD + "Profiling started...");
        stopTicker(profilingduration, s);
    }

    public static void startTicker() {
        bt = Bukkit.getScheduler().runTaskTimer(ReActions.instance, new Runnable() {
            @Override
            public void run() {
                tick_count++;
            }
        }, 0, 1);
        active = true;
    }

    public static void stopTicker(Long delay, final CommandSender s) {
        if (!active) return;
        Bukkit.getScheduler().runTaskLater(ReActions.instance, new Runnable() {
            @Override
            public void run() {
                bt.cancel();
                bt = null;
                active = false;
                saveProfileResult();
                printLastResult(s);
            }
        }, delay);
    }

    public static void saveProfileResult() {
        try {
            File f = new File(ReActions.instance.getDataFolder() + File.separator + "profiler.yml");
            if (!f.exists()) f.createNewFile();
            YamlConfiguration cfg = new YamlConfiguration();
            cfg.load(f);
            for (ProfEl pl : list) {
                cfg.set(date_prefix + " - " + pl.tick_num + " - " + pl.process, pl.execution_time);
                if (!pl.comment.isEmpty())
                    cfg.set(date_prefix + " - " + pl.tick_num + " - " + pl.process + "-info", pl.comment);
            }
            cfg.save(f);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void printLastResult(CommandSender s) {
        if (list.isEmpty()) s.sendMessage(ChatColor.RED + "No profile data found!");
        else {
            ProfEl pl = null;
            long average = 0;
            for (ProfEl aList : list) {
                if (pl == null) pl = aList;
                if (pl.execution_time < aList.execution_time) pl = aList;
                average += aList.execution_time;
            }
            average = average / list.size();
            s.sendMessage(ChatColor.GOLD + "Profiled " + list.size() + " processes. Average executing time: " + average + " ns.");
            s.sendMessage(ChatColor.GOLD + "Slowest process is " + pl.process + " Time: " + pl.execution_time + " ns. Comment: " + pl.comment);
        }
    }

}