Solved Per-User .yml files

Hello all. Im currently working on a per-user .yml file plugin and have run into a brick wall. Code and traces below, thanks in advance =)

Core.class:

Code:

public class Core extends JavaPlugin {
   
    Logger logger = Logger.getLogger("Minecraft");
    PluginDescriptionFile pdf = getDescription();
   
    private static Core core;
   
    public static Core getInstance() {
        return core;
    }
   
    public void onEnable() {
        logger.info("[" + pdf.getName() + "]" + " Enabled " + pdf.getName() + " v" + pdf.getVersion());
        registerEvents();
    }
   
    public void onDisable() {
        logger.info("[" + pdf.getName() + "]" + " Disabled " + pdf.getName() + " v" + pdf.getVersion());
    }
   
    public void registerEvents() {
        PluginManager pm = Bukkit.getServer().getPluginManager();
        pm.registerEvents(new CreatePlayerFiles(), this);
    }
}

CreatePlayerFiles.class:

Code:

public class CreatePlayerFiles implements Listener {

    Core core = Core.getInstance();
    FileConfiguration pConfig = null;

    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
    public void onPlayerJoin(PlayerJoinEvent event) throws IOException {
        Player player = event.getPlayer();
        File pFile = new File(
                core.getDataFolder() + File.separator + "userdata" + File.separator + player.getName() + ".yml");
        if (!pFile.exists()) {
            pFile.createNewFile();
            pConfig = YamlConfiguration.loadConfiguration(pFile);
            pConfig.set("path.to.key", false);
            pConfig.save(pFile);
            System.out.println("[ServerCore]" + " Created file: " + player.getName() + ".yml");
        }
    }
}

Trace:

Code:

[09:35:07 INFO]: UUID of player redtsch is 69d9ff9b-9485-4940-bb5b-c4fc0935a83a
[09:35:07 ERROR]: Could not pass event PlayerJoinEvent to ServerCore v1.0.0a
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[bukkit.jar:git-Bukkit-f326992]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[bukkit.jar:git-Bukkit-f326992]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [bukkit.jar:git-Bukkit-f326992]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.PlayerList.onPlayerJoin(PlayerList.java:316) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.PlayerList.a(PlayerList.java:143) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.LoginListener.b(LoginListener.java:115) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.LoginListener.c(LoginListener.java:53) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.NetworkManager.a(NetworkManager.java:223) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.ServerConnection.c(SourceFile:187) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:751) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:361) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:635) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:539) [bukkit.jar:git-Bukkit-f326992]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
Caused by: java.lang.NullPointerException
    at com.redstsch.mcredcraft.ServerCore.main.playerfiles.CreatePlayerFiles.onPlayerJoins(CreatePlayerFiles.java:25) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_60]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[bukkit.jar:git-Bukkit-f326992]
    ... 14 more
[09:35:07 INFO]: redtsch[/127.0.0.1:59268] logged in with entity id 2424 at ([world]-21.63780956040712, 71.0, 133.65750486660943)

If this look similar to code posted on another thread, it is. I'm just trying to find a temporary solution to my problem; then I will fine-tune it and make it my own.

Again, thanks all. =)

 

your instance variable in your main class is null, never assigned. Assign it a value in your onEnable

 

@WolfMage1
Ah it is, isn't it!

Would I fix this like so:

Code:

    public void onEnable() {
        logger.info("[" + pdf.getName() + "]" + " Enabled " + pdf.getName() + " v" + pdf.getVersion());
        registerEvents();
        core = this;
    }

If it helps, I still get an error at CreatePlayerFiles.class, line 25 after I put core = this in my onEnable()...

 

I'd put core=this first so if anything else in your plugin wants to use it then they can, but yeah.

 

hmmm, I've put core = this first in my onEnable():

Code:

    public void onEnable() {
        core = this;
        logger.info("[" + pdf.getName() + "]" + " Enabled " + pdf.getName() + " v" + pdf.getVersion());
        registerEvents();
    }

and I get the same error, I believe it has to do with core.getDataFolder possibly.. maybe not =p
EDIT:
Ok, so I did some re-arranging and now its throwing an error at line 26:

Code:

            pFile.createNewFile();

@WolfMage1
sorry if this seems like spam
so theres actually a new error as it seems:

Code:

[10:29:17 INFO]: UUID of player redtsch is 69d9ff9b-9485-4940-bb5b-c4fc0935a83a
[10:29:17 ERROR]: Could not pass event PlayerJoinEvent to ServerCore v1.0.0a
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[bukkit.jar:git-Bukkit-f326992]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[bukkit.jar:git-Bukkit-f326992]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [bukkit.jar:git-Bukkit-f326992]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.PlayerList.onPlayerJoin(PlayerList.java:316) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.PlayerList.a(PlayerList.java:143) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.LoginListener.b(LoginListener.java:115) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.LoginListener.c(LoginListener.java:53) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.NetworkManager.a(NetworkManager.java:223) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.ServerConnection.c(SourceFile:187) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:751) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:361) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:635) [bukkit.jar:git-Bukkit-f326992]
    at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:539) [bukkit.jar:git-Bukkit-f326992]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
Caused by: java.io.IOException: No such file or directory
    at java.io.UnixFileSystem.createFileExclusively(Native Method) ~[?:1.8.0_60]
    at java.io.File.createNewFile(File.java:1012) ~[?:1.8.0_60]
    at com.redstsch.mcredcraft.ServerCore.main.playerfiles.CreatePlayerFiles.onPlayerJoin(CreatePlayerFiles.java:26) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_60]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[bukkit.jar:git-Bukkit-f326992]
    ... 14 more

I believe i found the problem:

Code:

Caused by: java.io.IOException: No such file or directory

And honestly idk how to fix this one.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

EDIT:
so it turns out that i needed to correct my file directory, I've solved it so thanks for the help Wolfie =)