Plugin Already Initialized!

Discussion in 'Plugin Development' started by Omer H., May 28, 2017.

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  1. Offline

    Omer H.

    Ok, I have a bug that when I run the server it says Plugin already initialized and I don't know how to fix it tho...

    CONSOLE :
    Code:
    Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128M; support was removed in 8.0
Loading libraries, please wait...
[20:44:17 INFO]: Starting minecraft server version 1.8.8
[20:44:17 INFO]: Loading properties
[20:44:17 INFO]: Default game type: SURVIVAL
[20:44:17 INFO]: Generating keypair
[20:44:17 INFO]: Starting Minecraft server on *:25565
[20:44:17 INFO]: Using default channel type
[20:44:17 INFO]: This server is running CraftBukkit version git-Bukkit-18fbb24 (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT)
[20:44:17 INFO]: [FreeForAll] Loading FreeForAll v1.0
[20:44:17 INFO]: Preparing level "world"
[20:44:17 INFO]: Preparing start region for level 0 (Seed: 1131568168246138847)
[20:44:18 INFO]: Preparing start region for level 1 (Seed: 5304587007688184775)
[20:44:18 INFO]: Preparing start region for level 2 (Seed: 5304587007688184775)
[20:44:18 INFO]: [FreeForAll] Enabling FreeForAll v1.0
[20:44:18 INFO]: FreeForAll is now enabled.
[20:44:18 ERROR]: Error occurred while enabling FreeForAll v1.0 (Is it up to date?)
java.lang.IllegalArgumentException: Plugin already initialized!
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:98) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at me.blazingfiree.freeforall.MainClass.<init>(MainClass.java:18) ~[?:?]
        at me.blazingfiree.freeforall.Events.onJoinEvent.<init>(onJoinEvent.java:17) ~[?:?]
        at me.blazingfiree.freeforall.MainClass.registerEvents(MainClass.java:53) ~[?:?]
        at me.blazingfiree.freeforall.MainClass.onEnable(MainClass.java:32) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:342) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:314) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:406) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:370) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:325) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:235) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:504) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
Caused by: java.lang.IllegalStateException: Initial initialization
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:101) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at me.blazingfiree.freeforall.MainClass.<init>(MainClass.java:18) ~[?:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_121]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_121]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_121]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_121]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_121]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:289) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.<init>(CraftServer.java:251) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerList.<init>(PlayerList.java:69) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedPlayerList.<init>(SourceFile:14) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:179) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        ... 2 more
[20:44:18 INFO]: Server permissions file permissions.yml is empty, ignoring it
[20:44:19 INFO]: Done (1.339s)! For help, type "help" or "?"
    MAIN CLASS:

    Code:
    package me.blazingfiree.freeforall;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import me.blazingfiree.freeforall.Events.onJoinEvent;

public class MainClass extends JavaPlugin implements Listener {
    public ArrayList<Player> ingame = new ArrayList<Player>();
    private Logger logger = getServer().getLogger();
    FileConfiguration config;
    File file;

    @Override
    public void onEnable() {
        logger.log(Level.INFO, "FreeForAll is now enabled.");
        file = new File(getDataFolder(), "config.yml");
        config = YamlConfiguration.loadConfiguration(file);
        addConfigurationSections();
        saveConfiguration();
        registerCommands();
        registerEvents();
    }

    @Override
    public void onDisable() {
        logger.log(Level.INFO, "FreeForAll is now disabled.");
        saveConfiguration();
    }

    public void saveConfiguration() {
        try {
            config.save(file);
        } catch (IOException e) {
            e.printStackTrace();
            logger.log(Level.WARNING, "Cannot save configuration file.");

        }
    }

    private void registerEvents() {
        PluginManager pm = getServer().getPluginManager();
        pm.registerEvents(new onJoinEvent(), this);

    }

    private void registerCommands() {
    }

    public ArrayList<Player> getPlayersIngame() {
        if (ingame.isEmpty() == true) {
            return null;
        }
        return ingame;
    }

    private void addConfigurationSections() {
        if (config.isConfigurationSection("Player Data") == false) {
            config.createSection("Player Data");
        }

        // Scoreboard Stuff
        if (config.isConfigurationSection("Scoreboard") == false) {
            config.set("Scoreboard" + ".Scoreboard Name", null);
            config.createSection("Scoreboard");
        }

    }

    public FileConfiguration getCustomConfigFile() {
        return this.config;

    }

}


    onJoinEvent Class, Since It is being mentioned in the error..

    Code:
    package me.blazingfiree.freeforall.Events;

import java.util.UUID;

import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

import me.blazingfiree.freeforall.MainClass;
import me.blazingfiree.freeforall.PlayerData.PlayerManager;
import me.blazingfiree.freeforall.arenaUtils.ScoreboardClass;

public class onJoinEvent implements Listener {
   
    private MainClass mainClass = new MainClass();
    private FileConfiguration config = mainClass.getConfig();
    private ScoreboardClass scoreboardClass = new ScoreboardClass();

    @EventHandler
    public void onJoin(PlayerJoinEvent event) {

        Player player = event.getPlayer();
        UUID uuid = player.getUniqueId();

        scoreboardClass.addScoreboard(player);
        // First join config add
        if (event.getPlayer().hasPlayedBefore() == false) {
            PlayerManager pm = new PlayerManager(uuid, 0, 0, 1);
            config.set("Player Data", uuid.toString());
            config.set("Player Data." + uuid.toString(), "Player");
            config.set("Player Data." + uuid.toString(), "Kills");
            config.set("Player Data." + uuid.toString(), "Deaths");
            config.set("Player Data." + uuid.toString(), "Coins");

            config.set("Player Data." + uuid.toString() + ".Player", player.getName());
            config.set("Player Data." + uuid.toString() + ".Kills", pm.getKills());
            config.set("Player Data." + uuid.toString() + ".Deaths", pm.getDeaths());
            config.set("Player Data." + uuid.toString() + ".Coins", pm.getCoins());
        }

        // on Player name change :
        if (player.getName() != config.getString("Player Data." + uuid.toString() + ".Player")) {
            config.set("Player Data." + uuid.toString() + ".Player", player.getName());
        }

    }

}
    Please help me...
    I can't find any solutions to this error...

    :/
     
    Omer H., May 28, 2017
    #1
  2. Offline

    Forge_User_41720917

    @Omer H.
    You can't instantiate the main class again! You have to pass the instances from class to class. In your case it'd probably be easiest through the constructor.
     
    Forge_User_41720917, May 28, 2017
    #2
  3. Offline

    Omer H.

    What do you mean...?

    can you tell me how to fix it?
     
    Omer H., May 28, 2017
    #3
  4. Offline

    Forge_User_41720917

    @Omer H.
    Pass the mainclass instance through the constructor.
    Code:java
    1. YourMainClass plugin;
    2.  
    3. public YourListenerClass(YourMainClass plugin) {
    4.     this.plugin = plugin;
    5. }
    6.  
     
    Forge_User_41720917, May 28, 2017
    #4
  5. Offline

    Omer H.

    Now this error is gone but another one came up....

    Code:
    [21:03:09 ERROR]: Error occurred while enabling FreeForAll v1.0 (Is it up to date?)
java.lang.NullPointerException
        at me.blazingfiree.freeforall.Events.onJoinEvent.<init>(onJoinEvent.java:18) ~[?:?]
        at me.blazingfiree.freeforall.MainClass.registerEvents(MainClass.java:53) ~[?:?]
        at me.blazingfiree.freeforall.MainClass.onEnable(MainClass.java:32) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:342) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:314) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:406) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:370) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:325) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:235) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:504) [CraftBukkit.jar:git-Bukkit-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
     
    Omer H., May 28, 2017
    #5
  6. Offline

    Forge_User_41720917

    @Omer H.
    Please post the code again.
     
    Forge_User_41720917, May 28, 2017
    #6
  7. Offline

    Omer H.

    Code:
    package me.blazingfiree.freeforall.Events;

import java.util.UUID;

import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

import me.blazingfiree.freeforall.MainClass;
import me.blazingfiree.freeforall.PlayerData.PlayerManager;
import me.blazingfiree.freeforall.arenaUtils.ScoreboardClass;

public class onJoinEvent implements Listener {
   
    private MainClass mainClass;
    private FileConfiguration config = mainClass.getConfig();
    private ScoreboardClass scoreboardClass = new ScoreboardClass();

    @EventHandler
    public void onJoin(PlayerJoinEvent event) {
       
        Player player = event.getPlayer();
        UUID uuid = player.getUniqueId();

        scoreboardClass.addScoreboard(player);
        // First join config add
        if (event.getPlayer().hasPlayedBefore() == false) {
            PlayerManager pm = new PlayerManager(uuid, 0, 0, 1);
            config.set("Player Data", uuid.toString());
            config.set("Player Data." + uuid.toString(), "Player");
            config.set("Player Data." + uuid.toString(), "Kills");
            config.set("Player Data." + uuid.toString(), "Deaths");
            config.set("Player Data." + uuid.toString(), "Coins");

            config.set("Player Data." + uuid.toString() + ".Player", player.getName());
            config.set("Player Data." + uuid.toString() + ".Kills", pm.getKills());
            config.set("Player Data." + uuid.toString() + ".Deaths", pm.getDeaths());
            config.set("Player Data." + uuid.toString() + ".Coins", pm.getCoins());
        }

        // on Player name change :
        if (player.getName() != config.getString("Player Data." + uuid.toString() + ".Player")) {
            config.set("Player Data." + uuid.toString() + ".Player", player.getName());
        }

    }

}



    Code:
    package me.blazingfiree.freeforall;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import me.blazingfiree.freeforall.Events.onJoinEvent;

public class MainClass extends JavaPlugin implements Listener {
    public ArrayList<Player> ingame = new ArrayList<Player>();
    private Logger logger = getServer().getLogger();
    FileConfiguration config;
    File file;

    @Override
    public void onEnable() {
        logger.log(Level.INFO, "FreeForAll is now enabled.");
        file = new File(getDataFolder(), "config.yml");
        config = YamlConfiguration.loadConfiguration(file);
        addConfigurationSections();
        saveConfiguration();
        registerCommands();
        registerEvents();
    }

    @Override
    public void onDisable() {
        logger.log(Level.INFO, "FreeForAll is now disabled.");
        saveConfiguration();
    }

    public void saveConfiguration() {
        try {
            config.save(file);
        } catch (IOException e) {
            e.printStackTrace();
            logger.log(Level.WARNING, "Cannot save configuration file.");

        }
    }

    private void registerEvents() {
        PluginManager pm = getServer().getPluginManager();
        pm.registerEvents(new onJoinEvent(), this);

    }

    private void registerCommands() {
    }

    public ArrayList<Player> getPlayersIngame() {
        if (ingame.isEmpty() == true) {
            return null;
        }
        return ingame;
    }

    private void addConfigurationSections() {
        if (config.isConfigurationSection("Player Data") == false) {
            config.createSection("Player Data");
        }

        // Scoreboard Stuff
        if (config.isConfigurationSection("Scoreboard") == false) {
            config.set("Scoreboard" + ".Scoreboard Name", null);
            config.createSection("Scoreboard");
        }

    }

    public FileConfiguration getCustomConfigFile() {
        return this.config;

    }

}
     
    Omer H., May 28, 2017
    #7
  8. Offline

    timtower Administrator Administrator Moderator

    @Omer H. You don't have a constructor.
    mainClass is still null.
     
    timtower, May 28, 2017
    #8
  9. Offline

    Omer H.

    Why do I need a constructor if I don't have any thing to set up....?
    It will be empty..
     
    Omer H., May 28, 2017
    #9
  10. Offline

    Forge_User_41720917

    @Omer H.
    No, you pass your main class instance through the constructor.
     
    Forge_User_41720917, May 28, 2017
    #10
  11. Offline

    MomentHCF

    Also, for config I'm not sure if you need to do this but type (Classname).plugin.<your normal code>
     
    MomentHCF, Jun 1, 2017
    #11
  12. Offline

    timtower Administrator Administrator Moderator

    That would be static abuse.
     
    timtower, Jun 1, 2017
    #12
    MomentHCF likes this.
  13. Offline

    MomentHCF

    Thanks for telling me before I broke my own plugin doing this, lol.
     
    MomentHCF, Jun 1, 2017
    #13
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