On server restart, create new world.

I am trying to develop a gamemode where the map needs to be reset every time the server is restarted. I have looked at various other threads on ways of achieving this and none of them worked. Any updated solutions to this? Thanks.

 

onVoid When the plugin gets loaded, generate a world with your desired seed.

 

I am looking for a random world, not a seeded one. Also, I have tried doing that but I can't figure out how because most things dont work.

 

onVoid Random worlds have seeds, which you can create also. If your code doesn't work, post it.

 

Delete the world directory when the server is stopped and when the server starts, a new world will generate in place of the old one for you.

 

This. And if you need it automated, use a shell script!

 

Or batch

 

xTrollxDudex

Code:java

        try
        {
            World mainWorld = this.getServer().getWorld("worldeh");
            File worldFolder = mainWorld.getWorldFolder();
            this.getServer().unloadWorld(mainWorld, true);
            worldFolder.delete();
        } catch (Exception ex) {
            this.getLogger().log(Level.SEVERE, "Main world could not be deleted!");
        }

That is what I have in my ondisable but it doesn't work.
Rocoty

How do you use a shell script? I am looking to make it automated.

 

onVoid
It wouldn't work because after the first time the default level name would be world, and if world doesn't exist your code can't run. Did you change the level name to "worldeh."

 

Creeoer

Yes. Should I rename it back to world?

 

It probally wouldn't make a difference, if you went into the actual server config and changed the level name, not too sure.

 

The delete method for File only deletes the directory when there are no files inside it. You'll need a recursive method to delete all the files in the folders and then delete the world file.

 

teej107

How would I loop through all the files?

 

onVoid

 

mythbusterma

But how?

 

Batch, as mentioned above:

Code:

@ECHO OFF
java (enter your normal parameters here) -jar craftbukkit.jar
echo Press any key to continue to delete world and exit.
PAUSE 1>NUL
rd /S/Q world

 

ZanderMan9

I run off of a host so I don't know if that is possible. Also, how would you automate that?

 

onVoid Craftbukkit is shipped with Apache Commons (its shipped in net/minecraft/utils, but thats not versioned blocked). If you compile against that, it provides a class with a method to recursively delete a directory.
http://commons.apache.org/proper/co.../FileUtils.html#deleteDirectory(java.io.File)
The JavaDocs for that.

 

onVoid If it's hosted most likely it is Linux, not Windows, therefore you'd need Bash, not Batch.

 

onVoid Read up on recursion. It's can be a little confusing but it's something that every programmer should know.

EDIT: A link on recursive methods: http://danzig.jct.ac.il/java_class/recursion.html

 

Okay so this is my current onDisable:

Code:java

    @Override
    public void onDisable() {
        this.saveDefaultConfig();
        for (Player p : Bukkit.getServer().getWorld("worldeh").getPlayers()){
            p.kickPlayer(ChatColor.RED + "Restarting!");
        }
            World mainWorld = this.getServer().getWorld("worldeh");
            Bukkit.getServer().getWorlds().remove(mainWorld);
            Bukkit.getServer().unloadWorld(mainWorld, false);
            File worldFolder = mainWorld.getWorldFolder();
            //
            deleteAllInsideFolder(worldFolder);
            //
            if (new File(worldFolder, "/region").exists()){
                File regionFolder = new File(worldFolder, "/region");
                if (regionFolder.listFiles() != null){
                    deleteAllInsideFolder(regionFolder);
                }
                clear(regionFolder);
            }
            if (new File(worldFolder, "/playerdata").exists()){
                File regionFolder = new File(worldFolder, "/playerdata");
                clear(regionFolder);
            }
            if (new File(worldFolder, "/data").exists()){
                File regionFolder = new File(worldFolder, "/data");
                clear(regionFolder);
            }
            if (worldFolder.exists()){
                clear(worldFolder);
            }
    }

It deletes everything inside of the world folder except for the regions folder. If I put a .txt file inside the regions folder, though, it deletes that. I think the regions folder might not be deleting because the world is still running but I unloaded it... Anyone know why and how to fix?

 

onVoid um..... idk how recursive your "deleteAllInsideFolder" method is, but regardless of that, your code after that is not recursive. If you made your "deleteAllInsideFolder" right, you shouldn't be needing those checks afterward.

 

onVoid that code you posted can be wayyyy smaller.

nice stepplan:
use a enhanced for loop to loop through all your files inside the worlddirectory

1. check if the file is a director
   1. loop through all the files inside that second directory. with a repeating if as mention above
2. delete the file

made is once a time ago but I deleted it since I scrapped the project.

 

My deleteAllInsideFolder code:

Code:java

public void deleteAllInsideFolder(File wF){
for (File p : wF.listFiles()){
if (!p.isDirectory()){
clear(p);
} else {
deleteAllInsideFolder(p);
continue;
}
}
}
 

My clear code:

Code:java

 public static void clear(File file)
{
if (!file.exists())
return;
if (file.isFile()) {
file.delete();
} else {
for (File f : file.listFiles())
clear(f);
file.delete();
}
}

teej107

I am going with a for loop rather than a recursive method

guitargun

That's basically what I did (Plus I'm not looking for amount of space I'm looking for function.

 

bump

 

onVoid Here is the recursive delete files method that I use. Since I don't like spoonfeeding, I'm going to massively comment it.

PHP:

public static boolean delete(File src)
{
    //If source is directory, loop through the directory and call this same method.
    // Otherwise, just delete the file
    if (src.isDirectory())
    {
        //Looping through the directory.
        for (File f : src.listFiles())
        {
            //Calling this same method recursively, repeating steps above.
            delete(f);
        }
    }
    //This is for you should remove this part of the code.
    System.exit(0);
    //Delete the file in the end. If this is a directory, since this is called last,
    //all the files inside should have been deleted already, executing a successful delete.
    return src.delete();
}

 

teej107

That method did the same as mine. Gave me an error and didn't delete the region file.

 

onVoid Then post the error?

 

Skionz

Code:

[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.ChunkRegionLoader.a(Chun
kRegionLoader.java:132)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.ChunkProviderServer.save
Chunk(ChunkProviderServer.java:228)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.ChunkProviderServer.unlo
adChunks(ChunkProviderServer.java:321)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.WorldServer.doTick(World
Server.java:192)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.MinecraftServer.v(Minecr
aftServer.java:631)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.DedicatedServer.v(Dedica
tedServer.java:250)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.MinecraftServer.u(Minecr
aftServer.java:548)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.MinecraftServer.run(Mine
craftServer.java:459)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.ThreadServerApplication.
run(SourceFile:618)
[19:17:06 WARN]: net.minecraft.server.v1_7_R2.ExceptionWorldConflict: Failed to
check session lock, aborting
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.WorldNBTStorage.checkSes
sion(WorldNBTStorage.java:78)
[19:17:06 WARN]:        at net.minecraft.server.v1_7_R2.World.G(World.java:2544)

 

onVoid I found this http://www.spigotmc.org/threads/world-save-causes-strange-error-messages-in-server-log.20063/