[1.9] Custom Capabilities and Networking

[MrPlantPots]

I am wanting to store data throughout the game which can be synchronised with every player, so everyone has the same data. I have been told that using a capability would be the best way to do this. I am just unsure of the procedure involved. Would I attach the capability to the EntityPlayer? If so, how am I meant to store that data on the server side, and how am I meant to synchronise it?

[MrPlantPots]

I've read both of those pages I am trying to create a quest book and if one player completes the quest it will be completed for every player. I'm just really confused about how the capability system that is attached to the player stores data server side? I just cant wrap my head around it!

[MrPlantPots]

I tried using WorldSaveData but I was told capabilities were a more suitable choice ! When I used WorldSaveData I had a few issues as it wasn't saving the data after the game closed? And I needed a way to only initialise the NBT in the WorldSaveData once!

[Choonster]

I tried using WorldSaveData but I was told capabilities were a more suitable choice ! When I used WorldSaveData I had a few issues as it wasn't saving the data after the game closed? And I needed a way to only initialise the NBT in the WorldSaveData once!

 

I assumed each player would have their own quest progress (or progress shared in a party) like HQM, so I told you to use a capability. If the progress is global, world saved data is the correct choice.

[MrPlantPots]

The party option sounds appealing however, this is only intended for small servers where everybody plays together. I think I'm going to stick with global progress!!!

 

Here was my attempt:

 

 

WorldSaveData class:

public class SPNWorldSavedData extends WorldSavedData {
  private static final String DATA_NAME = "QUESTBOOK";

  private NBTTagCompound data = new NBTTagCompound();
  
  // Required constructors
  public SPNWorldSavedData() {
    super(DATA_NAME);
  }
  public SPNWorldSavedData(String s) {
    super(s);
  }
@Override
public void readFromNBT(NBTTagCompound nbt) {
	// TODO Auto-generated method stub
	data = nbt;

}
@Override
public void writeToNBT(NBTTagCompound nbt) {
	// TODO Auto-generated method stub
	nbt = data;
}

public static SPNWorldSavedData get(World world) {
	  // The IS_GLOBAL constant is there for clarity, and should be simplified into the right branch.
	  MapStorage storage = world.getMapStorage();
	  SPNWorldSavedData instance = (SPNWorldSavedData) storage.loadData(SPNWorldSavedData.class, DATA_NAME);

	  if (instance == null) {
	    instance = new SPNWorldSavedData();
	    storage.setData(DATA_NAME, instance);
	  }
	  return instance;
	}

public NBTTagCompound getData() {
	return data;
}

}

 

Code in world gen to initialise the WorldSaveData:

		SPNWorldSavedData data = SPNWorldSavedData.get(world);
		data.readFromNBT(NBTHandler.getNBTTag());
		data.setDirty(true);

 

Code in event handler to read data:

            SPNWorldSavedData data = SPNWorldSavedData.get(event.getEntityLiving().getEntityWorld());
            NBTTagCompound nbt = new NBTTagCompound();
            nbt = data.getData();
            System.out.println(nbt.getString("obj0name"));
            Minecraft.getMinecraft().thePlayer.sendChatMessage("HIYA: "+nbt.getString("obj0description"));

 

Reference Class (NBTHandler, purely used for organising code):

public class NBTHandler {

static NBTTagCompound nbt;
static ItemStack book;

public static void init() {
	nbt = new NBTTagCompound();
	nbt.setString("obj0name", "NAME0");
	nbt.setString("obj0description", "DESCRIPTION0");
	nbt.setBoolean("obj0state", false);
	nbt.setInteger("obj0QID", 0);


	Block block = SupernaturalBlocks.angel_block;


	book = new ItemStack(SupernaturalItems.blood_bottle, 1, 15);
	System.out.println(book.getItem().getUnlocalizedName());
	book.setTagCompound(nbt);
}

public static NBTTagCompound getNBTTag() {
	return nbt;
}

public static ItemStack getBook() {
	return book;
}

}

[MrPlantPots]

By initialise the WorldSaveData I meant add the NBT tags I created in the other class which I am now going to move into the worldSaveData class. The event it is in is currently an EntityJump event, however it will eventually be with the right click of the book. And the Reference class was unnecessary I'm not sure why I made it.

I just need some help with writing the initial Quest Data to the WorldSaveData and then how I can read and write to it!

[MrPlantPots]

I have completely followed this site : http://mcforge.readthedocs.io/en/latest/datastorage/worldsaveddata/

But the WorldSavedData simply wont stay if the world is closed and reopened. I have no clue what I am doing wrong?

[MrPlantPots]

Is there anything wrong with this code:

public class SPNWorldSavedData extends WorldSavedData {
  private static final String DATA_NAME = "QUESTBOOK";

  private NBTTagCompound data = new NBTTagCompound();
  
  // Required constructors
  public SPNWorldSavedData() {
    super(DATA_NAME);
  }
  public SPNWorldSavedData(String s) {
    super(s);
  }
@Override
public void readFromNBT(NBTTagCompound nbt) {
	// TODO Auto-generated method stub

}
@Override
public void writeToNBT(NBTTagCompound nbt) {
	// TODO Auto-generated method stub

}

public static SPNWorldSavedData get(World world) {
	  // The IS_GLOBAL constant is there for clarity, and should be simplified into the right branch.
	  MapStorage storage = world.getMapStorage();
	  SPNWorldSavedData instance = (SPNWorldSavedData) storage.loadData(SPNWorldSavedData.class, DATA_NAME);

	  if (instance == null) {
	    instance = new SPNWorldSavedData();
	    storage.setData(DATA_NAME, instance);
	    instance.getData().setString("obj0description", "DESCRIPTION");
	    instance.markDirty();
	  }
	  return instance;
	}

public NBTTagCompound getData() {
	return data;
}

}

 

And how would I read and write to this data? Would this work:

SPNWorldSavedData data = SPNWorldSavedData.get(world);
data.getData().setString("obj0description", "value");
data.markDirty();