help-development

[lost matrix]

Yeah, kind of like real time operating systems do it 😄

[lavish hemlock]

So the goal is not that it makes the task run faster but it prevents the entire server from lagging while the task is ongoing then.

[lunar wigeon]

tps are not the only important thing

[lavish hemlock]

And if you wanted to improve the performance of the actual task you'd use a more optimized method (i.e. the NMS-based alternative)

[lost matrix]

Yeah thats the idea. This way you can for example reserve 30ms per tick for the actual game and still schedule huge workloads
without the player noticing any tps drops.

[lavish hemlock]

I'd argue a good plugin shouldn't drop ticks.

[lost matrix]

For the players experience it is even critical

[lavish hemlock]

I remember older plugins where one player would modify a large area w/ WorldEdit and the server would just pause for a solid 3 seconds

[lunar wigeon]

ms per tick are also important

you can have 20 tps and 200 ms per second on your plugin

[remote swallow]

uh what

[lavish hemlock]

My friend consistently broke servers with WorldEdit and to this day I've no clue how.

[remote swallow]

there is always going to be 1000ms per second

that will never change

[lavish hemlock]

Destroy time

[lost matrix]

Im still deciding if he being sarcastic or not

[lost matrix]

Yeah im using this approach for my machine plugin (pls dont look it up i dont want to update it )
So no player can hog server resources

[lavish hemlock]

Aren't ticks a fixed time unit?

[lost matrix]

Those are the outliers

[lavish hemlock]

Actually no scratch that, game loop

[lost matrix]

And a plugin like that belongs straight in the garbage.

[lavish hemlock]

They're fixed time points (hence "every 5 ticks") but they do not correlate to a specific amount of milliseconds

[lost matrix]

*Unless this is a 99.9th percentile

[lavish hemlock]

And this I believe is because a tick = one cycle of the game loop.

[lunar wigeon]

I know XD but still

[lavish hemlock]

There's a number of things that can cause fluctuations during a game loop (hence why delta time exists for physics calculations)

[lunar wigeon]

it was 20 tps

[lost matrix]

You can have a single tick >50ms because there are catchup mechanics.
But it still disrupts the game loop.

[lunar wigeon]

20 tps != optimized

not always

[sterile breach]

is not a code error?

[lavish hemlock]

Can't believe I just guessed at how ticks worked

A game tick is where Minecraft's game loop runs once.

This is what happens when you try to code your own game engine.

[lost matrix]

btw every game has a tick loop. This is not exclusive to minecraft.

[lavish hemlock]

I know

Most games don't call them ticks though, afaik

[lost matrix]

Yeah been there ^^

[lavish hemlock]

The TPS can be maintained at 20 only if the MSPT is no higher than 50.

[wet breach]

I was about to point this out until i seen you mentioned it lol

[lunar wigeon]

but minecraft has 20 ticks, most games are based on 64, 128 ticks

[lost matrix]

*There are catchup mechanics that let mc keep 20tps even with one outlier.

[lunar wigeon]

and cs2 doesnt have ticks system

[lavish hemlock]

Interesting

The wiki doesn't mention that at all

[wet breach]

They do actually but you will probably find most tutorials refer to it as the game loop or the main loop which is essentially the same thing exception being rendering usually

[abstract sorrel]

anyone know what is causing this error:

https://paste.md-5.net/ihiteqokam.cs
https://paste.md-5.net/dobetoyogi.coffeescript

[lavish hemlock]

Ah a'ight

[lost matrix]

Imagine having one outlier within 10 ticks. You can, within a certain frame, pile
some ticks in a shorter period.

[lavish hemlock]

Part of me feels like the exact TPS cap doesn't really matter for most games as long as it's not something obnoxiously slow like in the 1-8 range

[lost matrix]

You are trying to get something from your yml that is not there.

[abstract sorrel]

if it is null the code assigns a value to it though so i dont understand what is causing that error

[lunar wigeon]

@lost matrix I have tried your workload distributor and it kinda lags, when it has 1 task to do (1 cuboid) it does good. But when I gave it 10 cuboids 50x50 it was lagging

[wet breach]

Does the file in question actually exist?

[abstract sorrel]

yes it does

[lost matrix]

Then you didnt implement it properly.
You can do thousands of tasks with millions of blocks.
Ive modified entire 4k x 4k worlds with this.
Loaded every single chunk, got all chests and removed items.

[lavish hemlock]

But can it run Doom?

[lost matrix]

[remote swallow]

can you run doom

[lavish hemlock]

Yeah I think I can imagine some Doom gameplay

It's not perfect but it's usable enough

[remote swallow]

encode it on ur dna

[lunar wigeon]

wdym not properly

literally copied and pasted

[wet breach]

Did the plugin create the file or did you create the file manually

[abstract sorrel]

the plugin created the file

[lost matrix]

This returns null

Its not in the config

[wet breach]

Well you path for obtaining the file and or creating it is flawed whch is why i am asking about it

[abstract sorrel]

earlier it checks if it is null and then assigns a value

how do u paste images in this server

[lost matrix]

Your config stays the same. You never updated it.
FileConfiguration != File
Former is in memory (already loaded), latter is on disk

?img

[undone axle]

Can't send images? That's because you're not verified! Use !verify to complete verification.
Alternatively, you can upload screenshots to any image hosting site and share the link.

Here's some screenshot utilities that can use to upload images.
Lightshot: https://prnt.sc
Imgur: https://imgur.com/upload
Flameshot: https://flameshot.org

[abstract sorrel]

thanks i think thats the problem

[lavish hemlock]

I'll verify your face with my fists.

[lost matrix]

[lunar wigeon]

https://media.discordapp.net/attachments/1048768544009093130/1086789175048671252/ezgif-1-c579a9abdd.gif

[lavish hemlock]

https://media.discordapp.net/attachments/846225763060678688/1115550594799767642/amogus_tiny.gif

[abstract sorrel]

we can't even see that its smaller than ur pp

[remote swallow]

it looks sus

its a sus distraction ddfance

[lavish hemlock]

Heh. If I'm small then you're measured in negative numbers, my friend :)

[lunar wigeon]

I mean it's odd the problem started when I added more cuboids

[wet breach]

Ticks is a bit arbitrary really. These days the main game loops are set to run as fast as possible. The only loops which typically are not are usually your rendering loops as you want those in sync with the refresh rate the hardware can handle. But tick loops is a bit arbitrary as well in that its really whatever you consider 1 loop to be. Typically ticks refer to the in game time speed however in game time speed are decoupled and dont usually dictate how fast everything else can be processed lol

[lost matrix]

Then you created one WorkloadRunnable per cuboid

[lunar wigeon]

so 10 workloadrunnables every 1 ticks?

[lavish hemlock]

Mmm that makes sense.

Because they're all competing for the same slice of time.

[lunar wigeon]

I mean then those workloadrunnables will overlap each other

[wet breach]

Depending on what you are doing probably could offload some of the work to another thread

[lavish hemlock]

Something to maybe consider is a hierarchical system.

[lunar wigeon]

cant place works async

[wet breach]

Cant place no, but you certainly can read and do other things

[lavish hemlock]

i.e. a root workload scheduler that is able to split time between multiple schedulers (one per each big task)

You do a little of one task, then a little of the next, and so on.

That way, they all perform at "the same time" and aren't dependent on one finishing before the other.

[abstract sorrel]

what do you guys think of my custom config class is there any optimisation i could do? https://paste.md-5.net/posicujaji.java

[wet breach]

You could always just keep track of runnables that are scheduled and if whether or not they have been ran

And adjust accordingly on scheduling or executing the next task

[slender elbow]

"it's only reading" doesn't mean thread safe

I'm sure you know about that funny hash map infinite loop

[wet breach]

In most instances you cant remove and place at the same time. However reading is different in that it doesnt modify the data or change the ordering. There is of course always the exceptions

And for hashmap there is concurrenthashmap

Which is a thread safe hashmap if you need it

[lavish hemlock]

Actually lemme explain better.

Consider you have multiple tasks occurring at once
These tasks are split up into smaller parts
Task 1 and task 2 should appear as if they're operating concurrently, so we can't just do all of task 1 and then do all of task 2, we need to do part of task 1 and then part of task 2
However it would be slow to always run each task every cycle, we want to do task 1 for a few ticks, task 2 the next few ticks, repeat
So you need a scheduler that decides which task gets run, and those tasks decide which micro-task gets run (which is probably just going to be the next one)

In other words
task = process
micro-task = instruction
lol

I'm sure you got the gist I just wasn't happy with my original explanation

[wet breach]

And what are you trying to accomplish in doing this in regards to the cuboids?

[lavish hemlock]

It means we can process all cuboids concurrently while keeping TPS at 20, like with the original workload distributor

[wet breach]

Well no

Its linear processing

So it will never be truly concurrent. Which is why i asked what are you trying to accomplish with the cuboids that you need such a system

Because what you are trying to setup may very well just make completing tasks slower

[lavish hemlock]

Operating systems handle processes on singular cores in a ""concurrent"" fashion. Since there's no way to execute multiple processes at the same time, they provide each process with a small period of time (a time slice) to execute instructions and swap between each process to give the impression of concurrent processing.

Round robin scheduling, it's basically what I've planned out above.

[wet breach]

You can execute multiple processes at the same time. Not sure where you got that you cant

Unless you are referring to processes as in work needing to be done?

[lost matrix]

Only one WorkloadRunnable ever. The server starts, you create one.
Then you can schedule workloads with this one runnable.
Wont lag if each workload is snall enough.

[lavish hemlock]

On a multi-core system, true concurrency can be achieved as multiple instructions can be executed simultaneously by different cores (which further utilize round robin scheduling so that multiple cores can handle multiple processes).
But when working with a single core, you cannot have multiple instructions from different processes executing simultaneously.

[wet breach]

How the OS executes stuff is completely different then how applications execute stuff. Even if you have a single core you can still execute processes concurrently because threading still exists for single cores

[lavish hemlock]

I'm speaking from a very primitive perspective on multitasking.

Until the early 2000s, most desktop computers had only one single-core CPU, with no support for hardware threads

[lunar wigeon]

each one is around 50x50x50

[lavish hemlock]

We don't have support for hardware threads in a Minecraft context either, whatever those would even be in that context.

[wet breach]

Java supports it so yes you do

[lavish hemlock]

I'm using the term as an analogy

We're executing a set of tasks like how an OS executes a set of processes

[wet breach]

Some stuff is multi threaded in mc as well as you can create threads

[lavish hemlock]

Minecraft is single-threaded and apparently not thread-safe so we can argue we're limited to one core, no threads.

[wet breach]

Except you cant apply this concept to applications

[lavish hemlock]

Yes you can lol

[wet breach]

Minecraft is multithreaded. Just not everything is

[lavish hemlock]

An OS is an application, all a round robin scheduler is is an algorithm for multitasking tasks.

[wet breach]

So no you are not limited to a single core

Java threads for example when they are created can in fact execute on other cores if the os dictates it should

[wet breach]

I know an os is technically an application if you want to be technical but you really cant compare it like one due to where it sits in the layers and what it does

[lavish hemlock]

That's an implementation detail.

[wet breach]

Not sure what you mean that is an implementation detail.

[lavish hemlock]

However the OS chooses to execute Java's code is not Java's responsibility.

[wet breach]

But it is because java can decide to over rule the os and put all threads on a very specific core

[lavish hemlock]

The parts where it is single-threaded are still of importance.

Isn't most chunk/entity logic single-threaded?

[wet breach]

In mc? Depends which ones you are referring to

[lavish hemlock]

Actually chunk logic might no longer be single-threaded.

I don't know, haven't looked deeply into it.

[wet breach]

World generation for example is multi threaded.

[lost matrix]

Anyways

[lavish hemlock]

Regardless we're making the assumption that we can't use multithreading for everything because not everything is safe to use multithreading with.

[wet breach]

But i am not sure how this all relates to what you are doing

[lavish hemlock]

Well here's the thing, if you have multiple players spawn new tasks, why should one player wait for another player's task to finish?

[lost matrix]

He is lterally just philosophing about scheduling in operating systems...

[lunar wigeon]

;D

[lavish hemlock]

I'm going to rephrase that. It's not the Java language's responsibility. I assume this is a JVM argument?

I don't recall seeing an API for saying "I want this thread in particular to be on this core"

[wet breach]

Because it isnt available in the api

[lavish hemlock]

So to the eyes of a Java programmer, Thread could refer to either an OS or hardware thread.

[wet breach]

It will never refer to a hardware thread

No application has the ability to mess with hardware threads except the OS itself

[lavish hemlock]

Correction: It could refer to code that runs on either an OS or hardware thread.

[wet breach]

Not even correct either. Everything runs on a hardware thread. Threads spawned by an application are virtual threads which run on a hardware thread

[lavish hemlock]

Actually that's a fair point.

I'll give you that one.

[lavish hemlock]

I still think this is important though

Imagine the first task takes 5 seconds to complete

[wet breach]

Well it depends on what those tasks are for

[lavish hemlock]

That's 5 seconds before the other player even sees their task (the second task) begin to start.

[wet breach]

Which is why i asked because i dont know

[lavish hemlock]

And what if you're the unlucky 5th player? That's an entire 20 seconds.

[lavish hemlock]

I'm not sure either.

I mean I'd still need to see an implementation of this to be sure it actually has a benefit.

[barren pumice]

so what is the best method to place many blocks then?

[lavish hemlock]

I think an issue would arise from complexity since more tasks = more time for each to complete.

There's less of an issue if you can take advantage of multithreading but I dunno.

[wet breach]

You would slice up the modification to smaller modifications. Pausing the task if it goes beyond a time limit for a task and then continuing after a short break

[barren pumice]

code example? im beginner

maybe not beginner but not that advanced

[lavish hemlock]

I'm curious as to if cooperative multitasking would maybe work (i.e. fibers/coroutines)

Only issue is that that doesn't natively exist in Java (yet) and would therefore be a pain to implement lol

[lavish hemlock]

Ah well if you wanted:

• Kotlin has a coroutines system although I'm not sure how compatible this is with Minecraft/Bukkit.
• Foreign languages, primarily Rust, can provide coroutines but you'd need to distribute platform-specific native binaries, and you would need some bridge API between the language and Minecraft/Bukkit.

[ivory sleet]

I mean project loom will address coroutines relatively well

[lavish hemlock]

Yeah but it's probably going to take a bit before it's actually available

re: Valhalla

[ivory sleet]

Loom?

I mean loom is like 50-75% delivered

[glad prawn]

Should i save ZonedDateTime as String or convert to TimeStamp in database?

[rotund ravine]

Coroutines work just fine

Whatever you want

I would probably convert to smth easy to save. So it’s all up to you.

[glad prawn]

ok

[ivory sleet]

Id would probably save timestamp + zone id

[glad prawn]

k 'll try

[wet breach]

Coroutines for kotlin only work if you use kotlin jvm

[paper cosmos]

Why my intellig idea keeps freezing and telling me it needs more memory. Every time after I increase it. Now its already 6 GB. Isn't it enough?

[lunar wigeon]

invalidate caches or reinstall intellij

you might also want to use intellij idea EAP

[hazy parrot]

What

There is no kotlin jvm

You run it on any jvm

It's compiled to normal bytecode

[knotty meteor]

https://gyazo.com/1ddf5a15c3291d2031648a458ffaa310

How do i let a hologram scroll colors like this?

[sullen marlin]

its just changing the text each time

[knotty meteor]

Oowh so i have to do it manually then

[vast ledge]

Idk

maybe a while loop

or an async bukkit runnable

[twilit roost]

eeem what the duck?

[knotty meteor]

I also think it is a runnable but wont removing and adding the armorstand create lagg?

[lunar wigeon]

just change it's customdisplayname?

[knotty meteor]

Oh yes that is also possible

Thank you! I will take a look at it

[sullen marlin]

your plugin is corrupt, recompile it

[twilit roost]

weirdly enough
it was just because of me renaming the file? :D
I didnt have to recompile it, just not rename it

strange

[quaint mantle]

DIdnt java 21 add virtual threads

[zealous osprey]

I have a very weird issue that I've never come across before:
I have a static block in an enum:

static {
        System.out.println("HERE");
        // create matName set
        for (StackableMachines stackableMachine : values()) {
            matMap.put(stackableMachine.material, stackableMachine);
            matNameSet.add(stackableMachine.material.name().toUpperCase(Locale.ROOT));
        }

        System.out.println("HERE");
        // create modMachines map
        for (StackableMods mod : StackableMods.values()) {
            final List<StackableMachines> modMachinesList = new LinkedList<>();
            for (StackableMachines machine : values()) {
                if (machine.getMaterial().name().startsWith(mod.getModPrefix())) modMachinesList.add(machine);
            }

            modMachines.put(mod, modMachinesList.toArray(new StackableMachines[0]));
        }
    }

And when I call a function on the enum for the first time I get a java.lang.ExceptionInInitializerError: null; But it doesn't even come to the sout; And why is the InInitializerError null.
Any help would be greatly appreciated :D

Nvm, figured it out

[vast ledge]

smort

[drowsy helm]

what is "a function"

which function?

and why not use the constructor instead of a static block

[vast ledge]

what

where did you get that from

[lost matrix]

Because the constructor would be called for every enum entry

[drowsy helm]

they're iterating through every value anyway

[lost matrix]

I would still go for lazy initializatzion instead.
Static blocks tend to break the classloader

[zealous osprey]

What do you mean with lazy initializatzion?

[quaint mantle]

by lazy !!

[lost matrix]

Let me give you an example real quick

[zealous osprey]

Thx :D

[lost matrix]

@Getter
@AllArgsConstructor
public enum VehicleType {

  CAR(false),
  BICYCLE(false),
  PLANE(true),
  HELICOPTER(true);

  private final boolean flying;

  private static EnumSet<VehicleType> flyingVehicles;
  
  public static EnumSet<VehicleType> getFlyingTypes() {
    if(this.flyingVehicles == null) {
      initializeFlyingVehicles();
    }
    return EnumSet.copyOf(this.flyingVehicles);
  }

  private static void initializeFlyingVehicles() {
    this.flyingVehicles = EnumSet.noneOf(VehicleType.class);
    for(VehicleType type : values()) {
      if(type.isFlying()) {
        this.flyingVehicles.add(type);
      }
    }
  }

}

[zealous osprey]

Ooh, you init whenever you need it, but only once then

[lost matrix]

Yes. This a common trick to increase startup times of applications. Especially in the web space.
Only initialize data the first time its needed.

[zealous osprey]

Fair, but I find that annoying when you have multiple functions and in all of them you'd have to check if the data was init first.

[lost matrix]

Let me write a simple abstraction for that really quick

You can simply write a class Lazy<T> which encapsulate this mechanic of containing an uninitialized element
and calling a supplier for the first time it is needed.

public class Lazy<T> implements Supplier<T> {

  private T element = null;
  private final Supplier<T> initializer;

  public Lazy(Supplier<T> initializer) {
    this.initializer = initializer;
  }

  @Override
  public T get() {
    return element == null ? (element = initializer.get()) : element;
  }
  
}

This results in great reusability

@Getter
@AllArgsConstructor
public enum VehicleType {

  CAR(false),
  BICYCLE(false),
  PLANE(true),
  HELICOPTER(true);

  private final boolean flying;

  private static final Lazy<EnumSet<VehicleType>> flyingVehicles = new Lazy<>(VehicleType::fetchFlyingVehicles);

  private static EnumSet<VehicleType> fetchFlyingVehicles() {
    EnumSet<VehicleType> fetched = EnumSet.noneOf(VehicleType.class);
    for(VehicleType type : values()) {
      if(type.isFlying()) {
        fetched.add(type);
      }
    }
    return flyingVehicles;
  }

  public EnumSet<VehicleType> getFlyingVehicles() {
    return flyingVehicles.get();
  }

}

Its a bit complicated to understand if you dont have functional programming internalized...

[sterile breach]

Hello, I have a question, for a give command for example, where arguments such as targetpalyer and amount are optional, am I obliged to rewrite the code a little each time?

when there are no args, when there are 1, 2 etc...

is this a good thing? or a bad thing?

[zealous osprey]

I'm rather confused how you are calling the #add function here: flyingVehicles.add(type); When the type of flyingVehicles is a Lazy<T>

[lost matrix]

I should have renamed that. It refers to the local variable

[zealous osprey]

ahhh, that makes more sense

[lost matrix]

If parameters are optional then you might want to provide defaults.
This way you can re-use your code.

[zealous osprey]

Ahhh, I think I finally understood

yup; Well, yeah, ig. It's good to know and thanks for showing me how this might be used. But I'll worry about smth like that when performance becomes an issue.

[lost matrix]

Its more about stability really. But find your path 🙂

My young padawan lol

[zealous osprey]

Stability? You mentioned something about it being more reliable with classloader, but how so?

[sterile breach]

so do something like this (the x and y are examples to show that the code is repeated.

on command

if (args is null) {
x
y
}
if(args.size == 1) {
x
y
}

if(args.size == 2) {
x
y
z
b
}
doing this is not emebetant? (I mean in programming it's not something to be avoided?)

[zealous osprey]

Thank you master

[zealous osprey]

args will never be null, as long as you are using the onCommand function provided by smth like the TabExecutor

[lost matrix]

Integer amount = NumberUtils.parse(args[2]);
if(amount == null) {
  amount = 1; // If no number provided -> use 1
}

Player target = PlayerUtils.fetchByName(args[1]);
if(target == null) {
  target = sender; // If no player provided -> use sender
}

target.getInventory().addItem(new ItemStack(Material.DIAMOND, amount));

You still need array length checks btw

[vast ledge]

can you not do

switch(args.size) {
  case: 1,2,3,4 -> yeet1
  case: 6,9,100,19 -> yeet2
}

[lost matrix]

I would look for an external command library. Spigots is quite crude and ungreatful to work with.

[sterile breach]

yes, but in the case where target and amount are not obligatory (we give 1 diamond to execute) we are obliged to repeat

[vast ledge]

AIKAR

He has acf

its great

[lost matrix]

Im using that as well.
Main problem is the very steep learning curve.

[vast ledge]

dont complain

about

[zealous osprey]

Why steep?

[vast ledge]

the class registering itself

[zealous osprey]

Mine is larger :D

[lost matrix]

Ah i see. The obligatory

new AdminCommand();

line. Not constructor abuse at all ^^

[vast ledge]

Let me abuse

my constructor

[lost matrix]

No? Just use fallback values

[sterile breach]

do you have a small example?

[vast ledge]

@lost matrix got any suggestions to improve perfomance on this?

[lost matrix]

There... is nothing happening here. Performance wise there is nothing to gain.
Structurally this looks good. One caveat: Your isEnabled variable should be named enabled
and the getter for it should be isEnabled(). Everything else looks clean.

[silent steeple]

??? This won’t affect performance

[silent steeple]

This is functional code

Boilerplate doesn’t affect performance

[lost matrix]

getAllowedMaterials should probably return a Set<Material>
Im assuming that you call contains() on this?

[vast ledge]

What is the difference between set and arraylist

[zealous osprey]

Why do you have a setIsEnabled method that sets the value of the config section to the boolean?
Your not changing the value in the enum then

[placid moss]

set cannot hold the same item

i.e. all items are unique

[zealous osprey]

Quicker lookup via HashSet?

[vast ledge]

Ye, thats why there is an isEnabled() Function

it returns the value from config

I also want the fallback value

[zealous osprey]

ooh, your isEnable boolean is meant for fallback? Why not make it final then

[zealous osprey]

ahh, now I see that there were 2 bools

[lost matrix]

Sets do not allow duplicates. This comes with the benefit of having very fast contains() implementations.
HashSet for example scales O(1). This means contains is always fast regardless of size.
ArrayList scales O(n). This means it gets linearly worse.
Example could look like this

| N Elements | List.contains() | Set.contains() |
|          1 |             1ms |            2ms |
|         10 |            10ms |            2ms |
|        100 |           100ms |            2ms |
|       1000 |              1s |            2ms |
|      10000 |             10s |            2ms |

I go over this a bit more in this thread:
https://www.spigotmc.org/threads/guide-beginners-guide-on-improving-your-codes-performance.396161/

[lunar wigeon]

psss. ArrrayList has .get

[lost matrix]

Yes sets are by definition unordered and dont have an index access.
But index access is used very rarely in properly written applications.

You need to keep track of those instances yourself.
Use a manager class which contains a Map<Integer, YourEntity> to
keep track of your virtual entities.

[vast ledge]

heres the use case of the enum

[lost matrix]

Ugh this article is quite old. Only had programmed for 6 months when i wrote it and it shows...

[vast ledge]

getFancyName() 😆

[lost matrix]

Catching Nullpointers is something i would strongly advise against

[vast ledge]

My poor console tho

[lost matrix]

Dont get me wrong, you should handle them. Just not by catching them.

[vast ledge]

wdym not catching them

[lost matrix]

try {} catch() {} on NPEs means that you didnt bother handling them

[vast ledge]

Then how do i bother handling them

[lost matrix]

You should check with if(element == null) instead

[vast ledge]

they are generated if there is an error with the json

[lost matrix]

Is that jsonsimple you are using?

[vast ledge]

fixed it

[vast ledge]

ye

[vast ledge]

duesnt get throw a null pointer thow

[lilac dagger]

is this worth doing over Math.pow(double base, double exponent) that returns a double?
public static int pow(int base, int exponent) { int result = 1; for (int i = 0; i < exponent; i++) { result *= base; } return result; }

[lunar wigeon]

well, yes

[vast ledge]

how do i prevent that from being null

[lunar wigeon]

there has to be method that returns boolean so you can check it

[lost matrix]

This is faster than the Math.pow implementation.
Math.pow is optimized for floating point operations.

[icy beacon]

save the master.ger(something) into a variable

[vast ledge]

but by doing that

ill create a nullpointer

[icy beacon]

no

[vast ledge]

master.get

can throw nullpointer

[icy beacon]

if master is null then yes

[vast ledge]

if the string im searching for cannot be found

[lilac dagger]

i remember somewhere of a way to save on iterations, but i forgot where

[lilac dagger]

it was some sort of programming trick for faster time or something

[icy beacon]

master.get(arg)
if master == null, this will throw an NPE
if it's not, it will either return a string or null

[lost matrix]

Yeah it has to do with bit shifting and multiply by a modulo of n^p iirc...

Probably not worth it

[icy beacon]

so in your case

String something = master.get(something); // also make sure that master != null if you didn't already
if (something == null) {
  bad;
}
JSONObject g = (JSONObject) something;

[vast ledge]

fixedd

[lunar wigeon]

replace return; with continue;

[icy beacon]

true

[icy beacon]

i don't think so

[vast ledge]

oh

i see

[icy beacon]

if master.get() returns null, casting null will throw smth

[vast ledge]

only go over the 1 isntance that has null as the return value, not break the entire loop

[lunar wigeon]

you have to cast it after checking if it's null

[vast ledge]

cast? you mean the (JSONObject)?

[icy beacon]

yes

it's casting

[sterile breach]

Hi, on location.tostring, i can reconvert to location?

[icy beacon]

if you cast null i'm pretty sure it'll throw an exception

[vast ledge]

lets try

[lost matrix]

Not sure if it works like i intend it to

    public static int power(int base, int exponent) {
      if (exponent == 0) {
        return 1;
      }
        
      int temp = power(base, exponent / 2);
      int result = temp * temp;
        
      if (exponent % 2 == 1) {
        result *= base;
      }
        
      return result;
    }

Hm this saves on iterations for smaller exponents.
Main drawback is that its recursive.
This is for sure faster. Every exponent that would make this slower than a loop
would lead to an overflow anyways.

[lunar wigeon]

you have to create your own methods to serialize and deserialize bukkit location

[lilac dagger]

ah, thank you, but i rather keep it non recursive

[lost matrix]

Do you want to store locations in yml files?

[lunar wigeon]

    public static String locationToString(Location location) {
        StringBuilder builder = new StringBuilder();
        return builder.append(location.getWorld().getName())
                .append(":")
                .append(location.getBlockX())
                .append(":")
                .append(location.getBlockY())
                .append(":")
                .append(location.getBlockZ()).toString();
    }

    public static Location locationFromString(String string) {
        String[] splitted = string.split(":");
        return new Location(Bukkit.getWorld(splitted[0]),
                Double.parseDouble(splitted[1]),
                Double.parseDouble(splitted[2]),
                Double.parseDouble(splitted[3]));
    }

for example this.

[lilac dagger]

maybe i can make it non recursive

nope, it's a head recursion, hmm

[sterile breach]

no, database

[lost matrix]

In that case you need to serialize it yourself

[silent steeple]

@buoyant viper if ur still trying to make a straight line on ur scoreboard without using &m- try &m─

[vast ledge]

wat da hail

[icy beacon]

i think they can be ignored but you can try bumping them to latest versions if they aren't already

[vast ledge]

I cant find the maven-resources-plugin in my pom.xml

[zealous osprey]

Btw, while we are on the topic of coding, efficiency and practices; What is a decent rule of thumb for when to throw exceptions, errors or just return smth like null?

[sterile breach]

Hey, i have a problem, on my serverstop, i loop an array to stock all my data in db, but but it seems to be taking too long, so he spits.

[lunar wigeon]

you usually throw exceptions when you make your own api

and nulls when you have to

[zealous osprey]

That's what I've been doing; Internally using null for private stuff, cause I know too expect it, but then exceptions for public stuff

[lunar wigeon]

I mean you can check nulls using standard if statement but java has Optional and its useful sometimes

Optional reduces useless if's

[pseudo hazel]

exceptions are annoying anyways

[zealous osprey]

I only use Optionals if I see no other way to show that no value coould be returned

[zealous osprey]

^

Well... I see their use, as in, "hey, smth has gone wrong and YOU have to deal with it"

[vast ledge]

Nope

It doesnt

[silent steeple]

python is so ass

[pseudo hazel]

its the same for nulls

but then the language will just throw nullptr exception anyways

if we are strictly talking about null pointer checks thats a useless exception to add yourself since it will already be thrown if you fuck it up

unless your code can accept nulls as valid values

then its on the api implementation to deal with it

thats how I see it

[pseudo hazel]

wait so is there still an issue?

[vast ledge]

nope

[pseudo hazel]

okay nice xD

[sterile breach]

public static Location serializeLocation(String locationString) {
String[] parts = locationString.split(",");
if (parts.length != 4) {
return null; // La chaîne n'est pas valide
}

    String worldName = parts[0];
    double x = Double.parseDouble(parts[1]);
    double y = Double.parseDouble(parts[2]);
    double z = Double.parseDouble(parts[3]);


    return new Location(Bukkit.getWorld(worldName), x, y, z);
}

is good?

[pseudo hazel]

yes looks good, except this is deserialization

if you want to put it into the database, you want it to go the other way around

[lunar wigeon]

I would throw exception instead of returning null

[pseudo hazel]

what exception

[onyx fjord]

probably custom

thats what i do

so its more clear where to look

you could also do optional ofnullable i guess

[pseudo hazel]

at that point just return null xD

[onyx fjord]

why not optional tho

with it you are sure nobody's gonna ignore it

[pseudo hazel]

yeah maybe u right..

[lunar wigeon]

you throw exceptions when you really need this method

and I guess he really needs to serialize and deserialize it

[pseudo hazel]

well if you dont really need a method then why do you have it

[lunar wigeon]

but some methods accept null's

I don't think so he want to accept Location that is null

especially if he deserialize it and serialize it

[manic crown]

Idk if this topic is at the right place here, but I´ll ask it anyways...

Goal: PlayerHead before the name in Chat

Problem: ResourcePacks force me to use the pixels at least height 8

• How can I make it so it is the single pixel that is shown in the chat,
• My plan is to use special Character negative spaces and ancent to align the pixels correctly

[lunar wigeon]

you probably can't send player head on chat (at least not in one message)

but then you can fetch it from for example namemc

or gameprofile

[wet breach]

Coroutines are not native to java therefore there is no bytecode for such things. And i meant to say it only works if you compile it to native.

[lost matrix]

That is pretty much all you do. You create offset characters. One for each color your want.
Then you get the skin of a player, scale his head to 8x8 pixels and reconstruct it
with your special characters. The chat might be a hefty place for this because you are
using up 64 characters just to represent the head.

[lunar wigeon]

yea, unfortunately you can't send itemstacks in chat

maybe in future

[lost matrix]

Itemstacks would work in the same manner. Just by using 16x16 pixels and
having an invisible pixel. Keep in mind that this will tank quite a bit.

Its better to distribute a resourcepack with item icons which replace characters.
Let me check if i have screenshots from a project i worked on that did this

[lunar wigeon]

but imagine you can put itemstacks in chat

that would be awesome

[lost matrix]

Hm i just found this where i used the icons in the tab list

Ah and in the lore

So its possible just needs a resourcepack

[lunar wigeon]

yea

exactly, you need resourcepack

[shut mauve]

Hi, I'm trying to code a plugin, but when I try to put accents in my messages such as é, à è..., it becomes é... I put my projet in UTF-8, but i still have the problem... Has anyone an idea ?

[lost matrix]

You need to tell maven to use the utf-8 charset as well

[kind hatch]

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

[lost matrix]

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

[shut mauve]

I'm using Gradle, and I checked

[lost matrix]

Ah gradle

Gradle uses utf8 on default iirc

[shut mauve]

Yes, but I've this enconding problem, so I don't know where does it come from

[lost matrix]

Are they weird only in console or also in the client?

[lunar wigeon]

wait

I will send you gradle code

[shut mauve]

They're weird in console & in chat

[lunar wigeon]

mate

[lost matrix]

Btw this file encoding is only applied to your resources. Not the source code.

[tender shard]

is the file itself also saved as UTF8? open the file and check the bottom status bar

[shut mauve]

ty

[shut mauve]

okay, so how do I put UTF-8 on my source code ?

[shut mauve]

Yes

[lost matrix]

Jetbrains IDEs have that info in the bottom right corner

[tender shard]

try adding this to your build file

compileJava.options.encoding = "UTF-8"

or this or whatever ```groovy
tasks.withType(JavaCompile) {
options.encoding = "UTF-8"
}

[lunar wigeon]

yea

[shut mauve]

It finally works, thank you

[tender shard]

np

no idea why it doesnt default to utf8

[hazy parrot]

You can compile it to jar like any other java application and coroutines will work

[shut mauve]

I've another question, I used to use ChatColor, but it's not depreciated in favor of net.kayori w/ Component.text..., isn't there any other easier methods do format text and colors ?

[lunar wigeon]

kyori provides Component and with components their own color system

    private static final LegacyComponentSerializer SERIALIZER =
            LegacyComponentSerializer
                    .builder()
                    .hexColors()
                    .extractUrls()
                    .hexCharacter('#')
                    .character('&')
                    .useUnusualXRepeatedCharacterHexFormat()
                    .build();

    public static TextComponent colored(String text) {
        return SERIALIZER.deserialize(text);
    }

using colored(String text) it will translate your String 🙂 (you can use hex)

[shut mauve]

I use Component.text but when I want to compare e.g. itemStack.displayName and Component.text("smth) it doesn't work

[lunar wigeon]

but Component.text("hi") doesn't color your message

[shut mauve]

yes, but when I add .color(NamedTextColor.DARK_BLUE), it looks like this

[12:56:52 INFO]: TextComponentImpl{content="Team §1blue", style=StyleImpl{obfuscated=not_set, bold=not_set, strikethrough=not_set, underlined=not_set, italic=not_set, color=null, clickEvent=null, hoverEvent=null, insertion=null, font=null}, children=[]}

[12:56:52 INFO]: TextComponentImpl{content="Team", style=StyleImpl{obfuscated=not_set, bold=not_set, strikethrough=not_set, underlined=not_set, italic=not_set, color=null, clickEvent=null, hoverEvent=null, insertion=null, font=null}, children=[TextComponentImpl{content="blue", style=StyleImpl{obfuscated=not_set, bold=not_set, strikethrough=not_set, underlined=not_set, italic=not_set, color=NamedTextColor{name="dark_blue", value="#0000aa"}, clickEvent=null, hoverEvent=null, insertion=null, font=null}, children=[]}]}

[lunar wigeon]

I know

I send you code to use

[lunar wigeon]

this ^^ put this in your ChatUtil class or however you call it

[shut mauve]

I'm sorry but I don't understand this code

[lunar wigeon]

it deserializes String into TextComponent

and applies color

[shut mauve]

I'll be able to compare displayName() and my string thx to that ?

[lunar wigeon]

this method just allows you to use COLORS in component

default minecraft colors and hex

[sullen marlin]

Sir this is spigot

[lunar wigeon]

but he asks for kyori

[shut mauve]

I'm asking for methods to format text, not kyori

[lunar wigeon]

oh

[shut mauve]

I use kyori, but I'm not satisfied

[lunar wigeon]

then use ChatColor.translateAlternateColorCodes('&', "&7your text");

[vast ledge]

ye

[lunar wigeon]

I recommend making utility class for that

[vast ledge]

the simplest way

[lunar wigeon]

but it doesnt work for hex 😦

[vast ledge]

Why do you need hex?

[lunar wigeon]

hexes are cool

[shut mauve]

I'm not only looking for colors, I'm looking for compare a .displayName() which gives a Component and a string

[lunar wigeon]

dude you are using paper

[placid moss]

lmao

[sullen marlin]

This is spigot

[placid moss]

?whereami

[undone axle]

https://cdn.discordapp.com/attachments/864180468680360027/944415049462714469/whereami.mp4

[lunar wigeon]

if you use paper you have to use kyori. If you should use default spigot api

[manic crown]

But I can tell you you can cast the getItemMeta#displayName() to a TextComponent and then TextComponent#content()

[lunar wigeon]

oooor he can use deprecated methods XD

[icy beacon]

wouldn't that return the raw string with no colors

[manic crown]

Yeah, isn´t that what he wants?

[icy beacon]

i don't know i just joined the convo lol

[vast ledge]

@lunar wigeon

[lilac dagger]

md5's components are pretty good

[icy beacon]

thought he'd want colors

[lilac dagger]

you guys should try them

[lunar wigeon]

HSB != hex

but I think you can use RGB

or Color.decode

[young knoll]

Look at startup logs for errors

And then share said error

?paste

[undone axle]

https://paste.md-5.net/

[tender shard]

it would be very handy if you'd show us more than one line

[lilac dagger]

do you have a plugin.yml file?

[tender shard]

also the "Modern"PluginLoadingStrategy is a paper thing

[lilac dagger]

haha

[tender shard]

just paste the full log

your class is called me.mcorsen.main.Main

but in plugin.yml you used com.mcorsen.main.Main

me != com

in plugin.yml change "main" to me.mcorsen.main.Main

[young knoll]

It should be in src/main/resources if you use maven/gradle

[kind hatch]

If you're using maven, it goes in the resources folder.
Otherwise it goes in the main directory.

Then make sure it lives in the project root.

[tender shard]

you should really be using maven

https://blog.jeff-media.com/how-to-create-your-first-minecraft-plugin-using-the-spigot-api-and-maven/

makes everything so much easier

[idle tinsel]

Hey guys, can someone help me with creating the teams and random team select for my minigame similar to skywars?

[echo basalt]

If you're writing a minigame

You should know enough

[austere cove]

Looking at PluginDescriptionFile, this is the pattern used to verify plugin names:

private static final Pattern VALID_NAME = Pattern.compile("^[A-Za-z0-9 _.-]+$");

This pattern allows spaces.

Looking at NamespacedKey, this is the checker for namespaces:

private static boolean isValidNamespaceChar(char c) {
    return (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '.' || c == '_' || c == '-';
}

This pattern does not allow spaces.

This means this would throw an exception right:

Plugin plugin = ...; // Plugin with name with space
NamespacedKey key = new NamespacedKey(plugin, "my-key");

[echo basalt]

Pr time

[idle tinsel]

damn bruh just looking for some help, The teams and team select has stumped me, could you or anyone just send me in the right direction?

[austere cove]

I don't have a stash account xdd

I should really get one huh

[young knoll]

Plugins explicitly throw an exception if they have a space in their name

[echo basalt]

Your game should have a team handler which is just a map of that relates what team each player chose

[austere cove]

where tho

[echo basalt]

Try and find out

[austere cove]

don't have an environment setup

[eternal night]

if (!VALID_NAME.matcher(name).matches()) {
    throw new IllegalArgumentException("name '" + name + "' contains invalid characters.");
}
name = name.replace(' ', '_');

[idle tinsel]

i shouldve been more specific, im trying to make players automatically be assigned to teams evenly

[austere cove]

wait did I really miss the next line

[echo basalt]

Yeah so that's just an even distribution

[austere cove]

oh I did that's embarassing

[young knoll]

Ah seems it was changed to replace spaces with _

[austere cove]

pretend I didn't say anything

[young knoll]

It used to throw an error

You set the x and z scale to 0

[echo basalt]

List of players, list of teams

[tender shard]

who calls their method "a" o0

[young knoll]

Pre obfuscated

[echo basalt]

Loop through all players and assign the next team

[young knoll]

:p

[echo basalt]

And loop around

[young knoll]

Crazy? I was crazy once

[idle tinsel]

okay perfect ill give it a shot, thank you!

[eternal oxide]

set as passenger

[tender shard]

it is directly at your feet

[shadow night]

It's just that you are directly in between two blocks

[eternal oxide]

if you want it to follow the player, set as a passenger and apply a translation

[icy beacon]

i'm working on a discord bot that should be working when my server network is working. it's best to tie it together with a bungee plugin, right? so that the bot would be always online except for when the proxy goes down

[tender shard]

then add 0.5, 0, 0.5

[icy beacon]

ty

[eternal oxide]

your math is bad

show some code

you are using transformations

so you should not be adjusting the location

don;t bother set it as a passenger

yes, then set a translation

so?

yes

yes

adjust translation to where you want it

no, your origin is zero as its a passenger

you translate relative

setTansformation(getTranslation... adjust

the translation is a vector

as a passenger you'll likely only have to adjust the Y component of Translation

-1 or -1..5

yes it will as it's a passenger

you are probably still trying to teleport it

thats what the tranformation is for

a negative Y vector

[worldly ingot]

Matrix math. How does it work, amirite?

[eternal oxide]

throw numbers at it until it works

[hybrid spoke]

but it doesnt take Number 😔

but you can take my number 😏

[lilac dagger]

matrix rotation sucks

[round charm]

Hi, I purchased a resource from Spigot and I'm having an issue where the money is paid but I can't download the resource. Where should I raise an issue?🥲

[hybrid spoke]

?support

[undone axle]

[e-mail]

[round charm]

Thank you and have a great day!👏

[icy beacon]

is it possible to limit slash commands in jda to only be accessible specific channels when creating them? or should i just check in SlashCommandInteractionEvent?

[twin venture]

IChatBaseComponent.ChatSerializer.a("{"text": "" + line + ""}");

can i do for example :
Utils.color(line)

using nms 1.16.5 , for custom entites

want to set the name with colors

[unborn sable]

Would I be able to create a plugin that allows jukeboxes to be ejected by a button?

[echo basalt]

sounds doable

[unborn sable]

I think i know what to do for ejecting a disc, but what would I do to accept a red stone signal input

[icy beacon]

how do i create a thread in jda? can't find much info on that

[ivory sleet]

ThreadChannel

ig u can just use IThreadContainer#createThreadChannel

but yeah u get a ThreadChannel object

[icy beacon]

yeah i found it in the docs but i don't know how to construct one

[icy beacon]

oh i see, lemme look into it onw

[twin venture]

soo ?>?

[icy beacon]

and what would i use as a ThreadContainer? a channel (MessageChannelUnion) does not seem to implement it

actually wait

[pseudo hazel]

is just using the color tag not good enough? i.e. ,"color":"#abcdef"

[ivory sleet]

do u know what a MessageChannelUnion is?

[icy beacon]

i can cast it to GuildChannel, ritght?

[icy beacon]

not exactly i'm just going with the flow while coding lol, i've only made one bot before

[icy beacon]

it seems like i can

[ivory sleet]

how does ur code look

dont cast it

[icy beacon]

well rn that's it, regarding the relevant part

  override fun onModalInteraction(event: ModalInteractionEvent) {
    if (event.modalId != "appeal") return

    val comment = event.getValue("appeal")?.asString ?: return
    // ???
  }

i feel like something can be done with event.channel.asGuildMessageChannel() but i can't see anything

[eternal oxide]

does kotlin allow String comparison with == ?

[icy beacon]

yep

it calls equals

[eternal oxide]

I know its not valid in Java

[icy beacon]

yes

[eternal oxide]

k

odd

[icy beacon]

oh wait

event.channel.asTextChannel().createThreadChannel()

this should be good

[ivory sleet]

yea

well

its problematic still

[icy beacon]

why so?

[ivory sleet]

since it may not be a TextChannel

[icy beacon]

ah, well i can always check beforehand, right?

[ivory sleet]

yes

getType() == TEXT

[icy beacon]

yup

and another question, is there any way to retrieve the title of the modal from ModalInteractionEvent? all i have is a modalId and I do not know if it's possible to get a modal from its id

[ivory sleet]

getInteraction()

no?

[icy beacon]

that returns a ModalInteraction and i don't see anything in ModalInteraction that returns modal/title

actually, this is an xyproblem probably, so i basically want to pass information received in SlashCommandInteractionEvent into the modal, so that it can also be treated in ModalInteractionEvent, and my first idea was the title, but maybe there are other ways

now that i think of it, i probably don't need to pass it into the command

i can just make fields in the modal

yeah

that works

[vast ledge]

My Furnace is pathfinding a way to the block above it

help

[sage dragon]

Is there an event that fires when a shrieker is activated?

I found the BlockReceiveGameEvent, but that isn't fired for Shriekers, right?

[vast ledge]

https://hub.spigotmc.org/javadocs/spigot/org/bukkit/event/block/BlockReceiveGameEvent.html

https://hub.spigotmc.org/jira/si/jira.issueviews:issue-html/SPIGOT-6562/SPIGOT-6562.html

[sage dragon]

Oh, so I probably just used it wrong.

Thanks

[lavish hemlock]

Kotlin does not have a special JVM. If you mean their compiler, then yes, but this is kind of pointless to bring up since I didn't say that you could use Kotlin coroutines without using Kotlin (after all, anyone with experience with them knows that suspend is a compiler feature)

[lavish hemlock]

Java 21 literally does not exist yet.

[lunar wigeon]

next release

[tender shard]

that is weird. what if zou wanted to do an actual == comparison

[hazy parrot]

===

[tender shard]

lol well ok

[lavish hemlock]

And while yes the JDK 21 project does say they're adding virtual threads, that's not available to anyone yet.
Additionally the point I was trying to make is that Java, in its current state, for most people, makes it hard to work with coroutines.

(I do wonder how many goddamn previews their memory/FFI API has to go through though)

Oh shit they're adding string templates, okay.

[sterile breach]

hello, have a question, on my plugin I need to load all the content of my db in a map and put it back / update it in the db when the server stops and every 5 min.

but over time imagine that I have 15000 lines to load it will no longer be possible if?

[young knoll]

Why do you need to load it all

[eternal oxide]

preload and only save changes

or don't load until you need it

[tender shard]

damn the compile result of coroutines is pretty ugly

[sterile breach]

Because its block locations and i need to check on blockbreak if the location is in my db

[eternal oxide]

good luck keeping all those block locations/data in memory

at least load/unload on chunk load/unload

[sterile breach]

Bad thing ?

So, how to do?

[eternal oxide]

no point in keeping block locations in memory for chunks that are not loaded

[hazy parrot]

Try making suspending function, wonder if results would differ

[sterile breach]

So i use cache and on chunk enter i load all blocks in it?

[eternal oxide]

no, on chunk load

there is no on enter

you can also be in one chunk and break blocks in another

[ivory sleet]

yea

[eternal oxide]

so only load data for chunks as they load

[lavish hemlock]

Be glad it doesn't have to literally compile a state machine

[sterile breach]

On chunk load event ?

[eternal oxide]

you need to loop all loaded chunks in onEnable to load data, then load your data in the chunk load event too.

drop/save your data in chunk unload

[sterile breach]

Just load all at server start in asynchrone is bad ?

[eternal oxide]

no thats fine

[sterile breach]

So i can?

[echo basalt]

enterprise code go brr

[eternal oxide]

are you not an English speaker?

[sterile breach]

No good

[eternal oxide]

Yes its ok to load your data async

[sterile breach]

Why do you take this question?

[eternal oxide]

You were having problems understanding what I was saying

Wanted to find out if it was age, language or trolling.

[shadow night]

Looks like he is using a translator to me

[eternal oxide]

seems so

[sterile breach]

I just want be sure for your response . Because before it you said it was bad.

[eternal oxide]

^ I never said loading your data async was bad. Which is why it seemed you were confused

[sterile breach]

You advised against it, saying that priority should be given to "chunk loading"

[sterile breach]

It happens sometimes, but usually

[eternal oxide]

In onEnable loop all loaded chunks and (async) load your data for those chunks.
in ChunkLoadEvent load any data you have for that chunk.
in ChunkUnloadEvent save any data which has changed and unload all junk data for the unloading chunk

[tender shard]

can you send the code I shall try?

[sterile breach]

Okay thanks

[tawdry echo]

How to create an invisible glowing slime and stretch iton a region to mark it for the player for a few seconds?

[young knoll]

You can only increase it's size

Which expands it in all directions

[eternal oxide]

Display Entity has a scale

[pseudo hazel]

why make it invisible

[young knoll]

^ Display entities are a much better option

[lapis schooner]

Hello good people,
Might I enquire how would one sneak own ChannelDuplexHandler into a connection pipeline to sneak on the packers sent to the client? Since the NetworkManager in PlayerConnection is private upwards of version 1.19 I know not of a way to access it

[tawdry echo]

BlockDisplay?

[chrome beacon]

Reflection?

[pseudo hazel]

depends, what kinda slime do you mean

[lapis schooner]

I really don't want to, mayhaps there is a simpler, more legitimate way?

[tender shard]

if it's private, you can only use reflection

[lapis schooner]

Welp, ok then. Thank u

[ivory sleet]

uhm

[quaint mantle]

for (Player player : players.getPlayers()) {
            (((CraftPlayer)player).getHandle()).playerConnection.sendPacket((Packet)packet);
            (((CraftPlayer)player).getHandle()).playerConnection.sendPacket((Packet)new PacketPlayOutEntityVelocity(entityfallingblock.getId(), x, y, z));
        }```
```yaml
Cannot find symbol```

so im getting the error "Cannot find symbol"

[eternal oxide]

?nms

[undone axle]

https://blog.jeff-media.com/nms-use-mojang-mappings-for-your-spigot-plugins/

[tender shard]

which szmbol

but yeah you are not using mojang maps

or you are but your code doesn't

?switchmappings

[undone axle]

https://blog.jeff-media.com/switching-from-spigot-mappings-to-mojang-mappings/

[quaint mantle]

hmm

thats into maven right

[eternal oxide]

we need an ?alexindex 🙂

[lapis schooner]

M?

[quaint mantle]

just clariyfing

[tender shard]

yes

are you using gradle? did you already set up mojang mappings or NMS in the first place?

what even is the symbol that it cannot find?

you either did not correctly import NMS classes in the first place, or you used remapped-mojang but are still trying to use spigot mappings

if it's the first: see first link
if it's the second: see second link

[icy beacon]

how do i mention a role with JDA without it looking awkward? i currently just do "<@$roleId>"

[quaint mantle]

prob its the first one

didnt do the mapping

[tender shard]

it would be very helpful if you could start by showing the full error you get

[quaint mantle]

thats all it said

highlighted .getPlayers

[tender shard]

well what even is "players"?

[quaint mantle]

I have 0 clue

[tender shard]

wow

[quaint mantle]

trying to fix up an abonded project

got everything up but

.getPlayers()

[tender shard]

getAsMention()

[icy beacon]

thx

[tender shard]

well "players" doesnt come out of nowhere. why don't you just check what it is?

[quaint mantle]

alr lemme check

public static void sendVelocityBlock(Location loc, Material mat, byte data, World players, Integer delay, Vector vec) {
        WorldServer worldServer = ((CraftWorld)loc.getWorld()).getHandle();
        EntityFallingBlock entityfallingblock = new EntityFallingBlock((World)worldServer);
        entityfallingblock.setLocation(loc.getX(), loc.getY(), loc.getZ(), 0.0F, 0.0F);
        PacketPlayOutSpawnEntity packet = new PacketPlayOutSpawnEntity((Entity)entityfallingblock, 70, mat.getId() + (data << 12));
        double x = vec.getX();
        double y = vec.getY();
        double z = vec.getZ();
        for (Player player : players.getPlayers()) {
            (((CraftPlayer)player).getHandle()).playerConnection.sendPacket((Packet)packet);
            (((CraftPlayer)player).getHandle()).playerConnection.sendPacket((Packet)new PacketPlayOutEntityVelocity(entityfallingblock.getId(), x, y, z));
        }
        SUtil.delay(() -> removeBlock(entityfallingblock, players), delay.intValue());
    }

SUtil

[tender shard]

"players" must be a field

oh wait

wtf

"players" is a world

why is the world called players

yeah anyway, World#getPlayers() clearly does exist https://hub.spigotmc.org/javadocs/spigot/org/bukkit/World.html#getPlayers()

[quaint mantle]

nope got nothing

[ivory sleet]

((CraftPlayer) target).getHandle().connection.connection.channel gives u the netty channel

then just inject

[quaint mantle]

o

that is

spigot 1.20

and im on

1.18

dang my servers gonna die

[tender shard]

https://helpch.at/docs/1.18/org/bukkit/World.html#getPlayers()

getPlayers has existed for ages

[quaint mantle]

how does it work tho

[lapis schooner]

Unless i got smth wrong, since 1.19 NetworkManager is private and u can't do that

[tender shard]

how does what work?

even in 1.8.8, World#getPlayers() exists

[quaint mantle]

Cannot resolve symbol 'player'

whats with this

[ivory sleet]

ru coding against spigot?

[tender shard]

?learnjava

[undone axle]

Here are some links to get you started on learning Java:

• https://www.codecademy.com/learn/learn-java
• https://www.sololearn.com/learning/1068
• https://www.learnjavaonline.org/
• https://programmingbydoing.com/
• https://docs.oracle.com/javase/tutorial/java/index.html

The last one is the only official one, however some of those concepts assume that you already know a bit about programming.

[tender shard]

"connection" in ServerGamePacketListenerImpl is private

[ivory sleet]

weird

[tender shard]

that means you decided to use "player" somewhere without ever declaring what it is anywhere

[eternal oxide]

it changed

[ivory sleet]

in 1.20 it works just fine

against paper

[tender shard]

?whereami

[undone axle]

https://cdn.discordapp.com/attachments/864180468680360027/944415049462714469/whereami.mp4

[tender shard]

https://nms.screamingsandals.org/1.20.1/net/minecraft/server/network/ServerGamePacketListenerImpl.html

[quaint mantle]

hmmm

I swear I did

[lapis schooner]

Maybe it's patched in paper

[eternal oxide]

its public in 1.19.2. I remember it changed around then https://nms.screamingsandals.org/1.19.2/net/minecraft/server/network/ServerGamePacketListenerImpl.html

[lapis schooner]

I host on purpur so it should work, gonna try it

[tender shard]

yes in 1.19.2

but not in recent versions

[eternal oxide]

nope

[tender shard]

1.19.4 made it private

[eternal oxide]

1.19.2 was the last time I saw it public

[tender shard]

1.19.3 its still public

just checked

[eternal oxide]

k

[shadow gazelle]

Are teams still the preferred method for hiding nametags?

[tender shard]

I think so

[lapis schooner]

I am pretty sure u can use a separate scoreboard and put everyone on the same team there. Just don't forget to disable teamate invis pot visibility

[lilac dagger]

network or something became private

[echo basalt]

17 interfaces, 8 abstract classes and 70 regular classes

I wonder if I'm going overboard with interfaces

[quaint mantle]

hi
how can i create a holograms (im using dh holograms) for show the timing remaining to a mine spawn with realmines

[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing D:\STUFF\189server\plugins\Spectaculation-0.2-SNAPSHOT.jar with C:\Users\xxx\Downloads\Skyblock-main\Skyblock-main\target\Skyblock-0.2-SNAPSHOT-shaded.jar

any reason this happens?

[tender shard]

because you're using the maven-shade-plugin

and have declared an execution for it, probably during package

the question should rather be, why did you use a totally different name for the .jar

[lapis schooner]

there is no such thing

[lilac dagger]

make sure to use decorators

[lapis schooner]

Every class and every method has to have an interface of it

[echo basalt]

ehh

[lilac dagger]

and bridges

[tender shard]

and blackjack

[echo basalt]

I do have an adapter somewhere

[lilac dagger]

good enough

[echo basalt]

but it's getting funky

got the biggest headache lmao

[quaint mantle]

is it me or do some images just appear blur when I click on them

[echo basalt]

might be the resolution

[tender shard]

looks fine to me

[echo basalt]

Because my monitor's 2k and it might be downscaling

first pic looks blurry on my 1080p monitor

And I also have really strong contrast settings on my 2k monitor which means sharex might be tripping

[tender shard]

looks fine

here too

[echo basalt]

mans flexing his 4k screen

I do want to get one

but I'm not in the right financial situation for that

[lilac dagger]

mac looks so fancy

[eternal oxide]

2k is plenty

[tender shard]

on 16 inches lol

[eternal oxide]

I already use 120% on everything at 2k

[echo basalt]

I paid mad money for my 17 inch 1440p 16:10 screen on my laptop

Was nice for coding in class

but now I'm done with school

[tender shard]

only time I've seen a school from inside during the last 10 years was once when I was drunk and visited my old school, and when there's elections going on

[shadow gazelle]

as in getScoreboardManager().getNewScoreboard()?

[eternal oxide]

I use a 32" 1440

[echo basalt]

ayy reached 30 stars

[lapis schooner]

Yup

[shadow gazelle]

Nice

I looked at my mod that other day and it had 41k downloads lmao

[echo basalt]

bruh

[tender shard]

probably you also have to set the "general" visibility or sth

[lilac dagger]

don't you need protocollib?

[tender shard]

i would just use TextDisplays for holograms btw

[shadow gazelle]

You never "need" protocol lib

[echo basalt]

well

sometimes it helps

[lilac dagger]

i'm pretty sure you do for per player stuff

[shadow gazelle]

Well, holographic displays maybe since it requires it if I remember correctly

[echo basalt]

not quite

but sometimes

There's native API for setting entity visibility in bukkit

But no native api for per-player metadata

[tender shard]

can always use NMS. but for per player stuff, theres api for that

[echo basalt]

maybe wait a tick

holodisplays wack

[tender shard]

idk, never used holographic displays

i always use armorstands or textdisplays

[lunar wigeon]

I recommend using decentholograms

🙂

[echo basalt]

never expected that to work lmao

I need sunlight exposure, might go our for a walk

[eternal oxide]

I live in the UK. I miss the sun.

[echo basalt]

I live in a coastal city

but I honestly can't focus on anything rn

and got a weird headache so I might just go out for a walk

[eternal oxide]

we get about 4 weeks of sun, and 47 of rain

[echo basalt]

it's the opposite here

Like 5 days of rain per year

and summer for the other 360 days

[shadow gazelle]

How should I make a countdown?

[lunar wigeon]

using HashMap or Cache and System.currentTimeMillis

[quaint mantle]

for database
is it a small query that happens every second
or is it a big query that happens every hour?

[shadow gazelle]

no

[quaint mantle]

wut

to me ?

[shadow gazelle]

yes

it's not for a db

[quaint mantle]

wydm

[shadow gazelle]

just a countdown from whatever amount that sends a message every second

[quaint mantle]

i ask for myself

btw

[shadow gazelle]

???

[tall dragon]

you can easily do that with a scheduler

?scheduling

[undone axle]

https://www.spigotmc.org/wiki/scheduler-programming/

[quaint mantle]

for database which one am i need use ?

• is it a small query that happens every second?
• or is it a big query that happens every hour?

[shadow gazelle]

Is there a way to make a repeating task stop after x amount of times or x amount of seconds?

[ancient plank]

Think about it, and you'll find your answer

[tall dragon]

by cancelling it

its all on the page

[ancient plank]

That theme coloring for the code block is cursed

[tall dragon]

haha yes it is

[ancient plank]

Dark blue, dark green, and black against a dark gray background

[echo basalt]

Only do the queries you need

When a player joins, do a query, fetch their data, save once in a while

and when the player quits you save once more and remove from the cache

[quaint mantle]

what if I do both at the same time?

i mean save datas per hour and save datas per left

is it necessary ?

[echo basalt]

https://www.spigotmc.org/threads/working-with-data.562421/

[quaint mantle]

ah this smiley 😄

[cinder abyss]

Hello, is there an easy way to store a persistent data in a Block ?

[tender shard]

?blockpdc

[undone axle]

Learn about CustomBlockData here:
https://www.spigotmc.org/threads/custom-block-data-persistentdatacontainer-for-blocks.512422/

[cinder abyss]

okay thanks

[quaint mantle]

he made it btw 😄

[lunar wigeon]

you can also use metadata

[tender shard]

metadata is not persistent

[cinder abyss]

I know

[cinder abyss]

I want to make custom blocks using ItemDisplay (packet-based) and I need to identify the block inside the ItemDisplay (to resend the custom block after a restart for example)

[tender shard]

but itemdisplays are entities and hence already implement PersistentDataHolder

[cinder abyss]

but they'll be packet based

[tender shard]

aah yeah

[cinder abyss]

so I can't retreive it after a restart

[tender shard]

then you can just use CustomBlockData

[cinder abyss]

that's what I'm going to do 😄

'cause that's useful

[quaint mantle]

Cannot resolve method 'getPlayers' in 'World'

for (Player player : players.getPlayers()) {
            (((CraftPlayer) player).getHandle()).playerConnection.sendPacket((Packet) packet);
            (((CraftPlayer) player).getHandle()).playerConnection.sendPacket((Packet) new PacketPlayOutEntityVelocity(entityfallingblock.getId(), x, y, z));
        }```

what I did wrong

[eternal oxide]

getPlayers() exists in World.

your players variable can;t be a world

[tender shard]

Or wrong import

[eternal oxide]

for a start name it world if it IS a world

[tender shard]

Or they are using bukkit 1.2 or sth lol

[eternal oxide]

true

[quaint mantle]

hi ElgarL

[eternal oxide]

hi

[tender shard]

Hello elgar

[eternal oxide]

hi too

[quaint mantle]

they said i need use uuid in hashmap for save datas at offline server
i got my reply but i wonder ur reply
why i can't use player in offline server?

im not offline player

i just wonder

[eternal oxide]

uuid is persistent. Player is not

[quaint mantle]

but in offline server

player isnt persistent ?

[eternal oxide]

if the player relogs the current Player object will not be valid

a new one is created

[chrome beacon]

Offline mode?

[quaint mantle]

ahh

alright

[eternal oxide]

use UUID and get a Player when you need it

[shadow night]

Wait, in offline mode servers, is the uuid a random uuid or the actual uuid of the player?

[eternal oxide]

its a UUID based upon their name in offline mode

[shadow night]

And that means?

[quaint mantle]

you answered my other question

[eternal oxide]

if two players log in with the same name at different times they use the same UUID

[shadow night]

But is the UUID the UUID the player with that name would usually have in online mode? Sorry for me being stupid

[eternal oxide]

no

its somethign like UUID.fromString("OfflinePlayer:" + name)

online UUID is assigned by Mojang and has no relation to a players name

an online UUID is always the same for an account

[shadow night]

Hmm, but is it possible to change the uuid of a player before they are logged into the server fully? I don't have any use for this, just curious

[eternal oxide]

if using bungee, yes

[quaint mantle]

How does spigot work with offline uuid?

how does it perceive

[lilac dagger]

like this

nothing more

[shadow night]

And if spigot, no? Or can you maybe change it inside the packet or somrthing?

[eternal oxide]

probably not.

as the UUID doesn't come from the client

[twilit roost]

heY!
I just realized that spigotmc supports only x mb of plugin size
but my plugin needs to have some stuff shaded

is there some way to upload it and bypass the limit?

[eternal oxide]

in thoery you could assign yoru own ids

[shadow night]

Hmm, ig. Well, I don't really know what to use that info for anyways lol

[eternal oxide]

use libraires entry in plugin.yml

[twilit roost]

I have this
but for example JDA and SQLITE-JDBC isn't a plugin
or is there some other "param" ?

[hazy parrot]

It's param called libraries, search it up, it downloads dependencies from maven central

[twilit roost]

oh!
oke
tysm

[hazy parrot]

And inside of your pom change scope to provided

[shadow night]

Hmm, wait. Could you in theory make a plugin that would allow offline mode people to join an online mode server?

[quaint mantle]

What do u prefer for caching and save player data ?

on left the server save datas from hashmap
or save datas from hashmap every 1 hour ?

[eternal oxide]

In thoery you can replace all teh minecraft server code and do whatever you want

[shadow night]

Mixins

[hazy parrot]

No, online mode servers authenticate on mojang first, that is why you sometimes get session expired

I mean yes, if you change server code lol

[shadow night]

But as far as I'm concerned of spigot got no mixins

Time to switch to sponge lol

[quaint mantle]

😄 why u use schnitzel ?

[shadow night]

It is my religion

[hazy parrot]

Fair enough

[shadow night]

I'm a follower of the great and holy, of the schnitzel

[quaint mantle]

am i save player data on left server

or every 1 hour ?

[eternal oxide]

what data specifically?

[shadow night]

Well, I would do both to make sure the data is safe

[quaint mantle]

money, level

[eternal oxide]

do you need access to that offline?

[quaint mantle]

wydm for offline

offline mode ?

[shadow night]

Offline player ig

[eternal oxide]

no, when the player is not logged in

[quaint mantle]

actually i will get this

but for bungeecord

[eternal oxide]

ok

[quaint mantle]

@eternal oxide if u wanna

wait

[eternal oxide]

then save when log out and every x minutes

[quaint mantle]

i will explain u better? my project