Per player config file - best way of reading and writing data?

Hi there,

I'm making a plugin that creates a config file when a player joins (with their UUID if one doesn't already exist), and I've run into a plugin; I cannot read or write to them.

I haven't used Java IO before, although I've attempted before. Is there a way for the Bukkit config system to like... turn a yml into a config?

Any help would be appreciated.

 

@Captain Dory A 'config' is just what most Bukkit developers call a YAML file.

 

@Captain Dory I made a YML config file class that makes it way easy for multiple config files. It's basically a copy from this: http://wiki.bukkit.org/Configuration_API_Reference#Advanced_Topics

 

@teej107 thanks for advice; I've written some methods.
However, I cannot get the plugin to save a default to the disk. This is my code:

Creating a file for UUID:

PHP:

@EventHandler
    public void onJoin(PlayerJoinEvent e) {
       
        File f = new File("config files/" + e.getPlayer().getUniqueId() + ".yml");
        if (!(f.exists())) {
           
            try {
               
                f.createNewFile();
                e.getPlayer().sendMessage("Creating file...");
                new Methods(e.getPlayer().getUniqueId()).createDefaults();
                new Methods(e.getPlayer().getUniqueId()).saveConfig();
               
            } catch (IOException ex) {
               
                ex.printStackTrace();
               
            }
           
        }
       
    }

This has some methods; getConfig, createDefaults etc

PHP:

UUID u;
   
    public Methods(UUID u) {
       
        this.u = u;
       
    }
   
    public FileConfiguration getConfig() {
       
        FileConfiguration temp = YamlConfiguration.loadConfiguration(new File("config files/" + u + ".yml"));
       
        return temp;
       
    }
   
    public void createDefaults() {
       
        getConfig().set("rank", "prisoner");
       
    }
   
    public void saveConfig() {
       
        try {
           
            getConfig().save(new File("config files/" + u + ".yml"));
           
        } catch (IOException e) {
           
           e.printStackTrace();
           
        }
       
    }


There are no errors in IDE, it's just that it doesn't work. It will create the file, but nothing will be in it.

 

Where did you look? Because your current file path won't be saving it within the plugins folder.

 

I understand; I want to save it in a folder in the root directory. Is this possible?

 

@Captain Dory Yeah

 

Ok. So directing back to the last question; The file will create but no text will be in it. What would you use to save text to a yml file?

 

@Captain Dory Everything you need to know about using YML files are:

• http://wiki.bukkit.org/Configuration_API_Reference
  
• http://jd.bukkit.org/rb/apidocs/org/bukkit/configuration/file/FileConfiguration.html

 

Still having some problems:

PHP:

public class Create implements Listener {
   
    @EventHandler
    public void onJoin(PlayerJoinEvent e) {
       
        Methods m = new Methods(e.getPlayer().getUniqueId());
       
        if (m.f.exists()) {
           
            e.getPlayer().sendMessage("Welcome back!");
           
        } else {
           
            e.getPlayer().sendMessage("Creating file...");
           
            m.createConfig();
            m.createDefaults();
            m.saveConfig();
           
        }
       
    }

}



PHP:

public class Methods {
   
    UUID u;
    public Methods(UUID u) {
       
        this.u = u;
       
    }
   
    File f = new File("config files/" + u + ".yml");
    FileConfiguration c = YamlConfiguration.loadConfiguration(f);
   
    public void createConfig() {
       
        try {
           
            f.createNewFile();
           
        } catch (IOException e) {
           
            e.printStackTrace();
           
        }
       
    }
   
    public void createDefaults() {
       
        c.set("rank", "prisoner");
        c.set("money", 0);
       
    }
   
    public FileConfiguration getConfig() {
       
        return c;
       
    }
   
    public void saveConfig() {
       
        try {
           
            getConfig().save(f);
           
        } catch (IOException e) {
           
            e.printStackTrace();
           
        }
       
    }
   
}



It will write 'rank' and 'money' to the file, but the file is called 'null' :B
any suggestions?

 

Look at your initialization sequence. You try to assign your files and configurations when it is constructed, and eager initialized fields come before constructor initialized fields. Your UUID is not eager initialized, and becomes set after all the eager initialized, the File and FileCofiguration fields are set. This is a case where all fields depend on the other being non-null, so place your initialization code IN ORDER inside your constructor. Also, please use final.

 

@xTrollxDudex

I'm thankful for your help, but I don't really understand what you mean. I would greatly appreciate if you could provide a few examples to fix the plugin and my techniques. Thank you

 

You're using the UUID before it is set by the constructor, when it is null.

 

Oh ok, it's working now. Thanks