Loop through all blocks

I have a HashMap that stores a block along with an int. I am using a scheduler that is running every 6 ticks. Usually for my HashMaps if they have strings for a player's UUID, I loop through all the players on the server and check if they are in that HashMap. However I see no method for looping through all the blocks in a world.

How would I get all the blocks inside of a chunk.

 

What is but you're trying to do? Looping through all the blocks in the world would inevitably crash the server.

 

There are 4,703,919,736,605,502,341,375 blocks in the bounds of a Minecraft world. That's going to take more than 6 ticks.

 

@Signatured @adam753 I realized that so that is why I changed it to chunk.

 

Instead of looping through all the chunks, why not just store the block locations in a hashmap, loop through the locations and get the block that way?

 

@Signatured The block is not directly in or under the player, storing the location would do nothing.

 

I used this in one of my plugins:

Code:

@Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
        Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new Runnable() {
            public void run() {
                World world = Bukkit.getServer().getWorlds().get(0);
                {
                    for (Chunk chunk : world.getLoadedChunks()) {
                        for (BlockState blockState : chunk.getTileEntities()) {
                            if(blockState instanceof Sign) {
                                //DO SOMETHING
                            }
                        }
                    }
                }
            }
        }, 20, 20);
    }

 

@poepdrolify Lets imagine that code ^ in a certain senario:
100 Players on, on the same world but on different places, Imagine the ammount of chunks loaded. For now a bottom line estimation is 100 chunks x 200 TileEntities on it:
100 x 200 = 20000 so your code above will loop through 20k blocks and perform actions every 1 second? really?
I wonder what the big O notation would be for the code above... if it existed.

 

@mine-care for small servers

 

@poepdrolify Well if you are gonna publish a plugin live there is no condition "for small servers" :/ Also there are WAY more efficient ways by storing locations for instance. Also for small servers, it is still inefficient

 

@mine-care It was custom made for someone

 

@poepdrolify
If that is the case it shouldnt be posted here XD in forums you cant controll the use of pieces of code.