help-development

[undone axle]

Bootstrap Jar
The main spigot-1.18.jar is now a bootstrap jar which contains all libraries. You cannot directly depend on this jar. You should depend on Spigot/Spigot-API/target/spigot-api-1.18-R0.1-SNAPSHOT-shaded.jar, or the entire contents of the bundler directory from your server, or use a dependency manager such as Maven or Gradle to handle this automatically.

Please read the release notes for further information: https://www.spigotmc.org/threads/9-years-of-spigotmc-spigot-bungeecord-1-18-1-18-1-release.534760/#post-4305163

[wet breach]

another link as well

[silver robin]

wait what

[shadow owl]

Is there any way to have an AttributeModifuer on an item apply to a player without them wearing/holding it?

EDIT: nevermind, figured this out, you can apply attributemodifier directly to player.getAttribute() since that returns an AttributeInstance

[silver robin]

buildtools --remapped which basically gives a jar, with unobfuscated names, but comments and docs are lost, right?
so it's not possbile in any other way?

[wet breach]

there is no documentation for spigot-server

only api has documentation

[silver robin]

alright, and how do I get craftbukkit? (i assume it's the bridge between spigot and nms)

[wet breach]

but you wanted to use NMS, so you need spigot-server jar

[wet breach]

spigot is craftbukkit

[eternal oxide]

?nms just follow the tutorial

[undone axle]

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

[eternal oxide]

Do exactly as it says

[silver robin]

should I remove the other spigot-api dependency from pom or not then?

[wet breach]

spigot api isn't needed as a dependency if you are going to depend on spigot-server since the api is shaded into the server jar

[silver robin]

BuildTools will install all dependencies to your local maven repository.
I'm getting this error, unsure where I'm supposed to put the jar after buildtools finishes it's job?

[tender shard]

1.16.5 has no remapped version

[eternal oxide]

nowhere, follow the tutorial word for word

1.16 ah

[silver robin]

I'm okay with using obfuscated names, i'd just like to be able to use org.bukkit.craftbukkit, net.minecraft.server, and com.mojang.authlib classes

[wet breach]

oh, 1.16 then you just need to have spigot-server as a dependency and either let intellij install it or put it in your local maven repo

[tender shard]

1.16.5 is like 2.5 years old already D:

why does anyone still use it

[silver robin]

performance 😦 I'm running a cheap server

[icy beacon]

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Client does not support authentication protocol requested by server; consider upgrading MySQL client (full error and other info: https://paste.md-5.net/vipumabaxa.makefile)
any idea why this is happening? mysql select version(); outputs 10.4.27-MariaDB, dependency is com.mysql:mysql-connector-j:8.0.33

[tender shard]

1.16.5 uses spigot mappings, which is a mixture of obfsucated and random names

just remove the <classifier>

[silver robin]

how do I get it?
this: <artifactId>spigot-server</artifactId> doesn't work; intellij says ```Could not find artifact org.spigotmc:spigot-server:pom:1.16.5-R0.1-SNAPSHOT in spigot-repo (https://hub.spigotmc.org/nexus/content/repositories/snapshots/)

[tender shard]

run buildtools

[silver robin]

yeah, I got the jar

[tender shard]

run buildtools

[wet breach]

don't think buildtools installs the server jar at that version

[silver robin]

run buildtools in which directory?

[tender shard]

doesnt matter

[icy beacon]

wherever

[tender shard]

just urn buildtools for 1.16.5

and then add spigot 1.16.5 as dependency

that's it

[native bramble]

How can i check that item was renamed by plugin, not by player?

[silver robin]

the jar itself? I'm asking how to do it through maven (if possible) because in the directory where buildtools ran there are .java classes and its much better to use those than to let intellij decompile the jar

[icy beacon]

buildtools will magically add the dependency to your local repo

wherever you run it

[tender shard]

1. run buildtools for 1.16.5
2. add spigot 1.16.5 as dependency to you rpom.xml

[icy beacon]

and it'll be available in maven

just run buildtools

please

mysql problem

[tender shard]

there is literally no need to mess with any files that buildtools generated

just run it, and then use maven to add org.spigotmc:spigot:1.16.5-R0.1-SNAPSHOT

<dependency>
  <groupId>org.spigotmc</groupId>
  <artifactId>spigot</artifactId>
  <version>1.16.5-R0.1-SNAPSHOT</version>
  <scope>provided</scope>
</dependency>

[silver robin]

that's what I'm not sure about Cannot resolve org.spigotmc:spigot:1.16.5-R0.1-SNAPSHOTspecifically

[tender shard]

how often do you want me to tell you to run buildtools for 1.16.5

[silver robin]

wait nevermind

it was okay

I had the mojang remapped thing in <dependency> left, my bad

[tender shard]

^

remapped-mojang is only available in 1.17+

[silver robin]

eh, I thought it's not going to do anything and that it would matter where buildtools is ran, but intellij indexed it now, thanks

[tender shard]

no, you can run it anywhere, buildtools automatically mvn installs the dependencies it has built

[silver robin]

does that "local maven repo" point back to the buildtools folder or is it copied? (is it safe to delete buildtools folder now?)

[icy beacon]

it doesn't point back to anything

[tender shard]

your maven repository is at $HOME/.m2/repository. maven copies the files there

[icy beacon]

it stores your local dependencies

[tender shard]

tl;dr you can remove buildtools after it's finished

[icy beacon]

whenever you add some dependency in your project and then refresh the pom, if the dependency was not yet in your local repo, it gets downloaded

almost same with buildtools, you run it and it's now in your local repo

which means that you can use it in any of your projects

maven will look for the dependencies in your local repo

[icy beacon]

which is here ^

[silver robin]

so it looks locally first?

[tender shard]

yes

[icy beacon]

i'd say it only looks locally

[tender shard]

and if something's not there, it looks in maven central and all your declared repositories

[icy beacon]

if it's not there it downloads

yep

[silver robin]

makes sense

[icy beacon]

🙂

[silver robin]

I thought "local maven repository" refers to where my intellij project is for some reason, mb

[icy beacon]

lol

[wet breach]

technically, if you have no repos listed in the pom, it looks at maven central first. If you do have a repo listed, it will look at that repo first, then maven central then locally

unless you specify to only look locally

in either case, maven will eventually find it

[tender shard]

it always uses the local repository first

[wet breach]

no

[icy beacon]

or not 🙂

if it doesn't exist at all

nitpicking

[wet breach]

well if it doesn't exist at all, yeah won't find it

but I was just detailing the order in which maven looks for dependencies lol

local is always last unless you configured maven for offline in which case it will only look locally lol

[native bramble]

How can i check that item was renamed by plugin, not by player?

[tender shard]

ofc it uses the local repo first

[smoky anchor]

Is the item being renamed by your plugin ?

[native bramble]

yeah

[smoky anchor]

Then just give it some flag with

?pdc

[undone axle]

https://www.spigotmc.org/threads/a-guide-to-1-14-persistentdataholder-api.371200/

[native bramble]

i saw that getlocalizedname give another output than getdisplayname

[native bramble]

i cant

[smoky anchor]

don't tell me

[native bramble]

i need to rename itemframe when it placed

[tender shard]

the only case when maven attempts to download something from a remote repo that you already have in your local repository is to attempt to update snapshots

which is by default once per day

[smoky anchor]

I don't see how those are related
Can you please explain what exactly you're trying to do
With your best English if possible

[wet breach]

have mine set to never unless I specify. Don't like it randomly updating lmao

[native bramble]

I need to realize invisible item frames. When player cst a splash potion frames, which in radius of potion, should be always invisible, so i need not only setVisible, but also smth data in frame, that i will check and make it invivisble on hangingplaceevent

https://pastebin.com/GbC7urqv

here is code

i also have this event:

@EventHandler
    public void onPlayerPlaceFrame(HangingPlaceEvent e){
        ItemStack item = e.getItemStack();
        if(item == null) return;
        if(item.getType() == Material.ITEM_FRAME){
            ItemFrame frame = (ItemFrame) e.getEntity();
            if(!item.hasItemMeta()) return;
            if(!item.getItemMeta().hasDisplayName()) return;
            System.out.println(Arrays.toString(item.getItemMeta().getLocalizedName().getBytes()));
            if(item.getItemMeta().getDisplayName().equals(ChatColor.RESET + "Невидимая рамка")){
                frame.setVisible(false);
            }

        } else if (item.getType() == Material.GLOW_ITEM_FRAME) {
            GlowItemFrame frame = (GlowItemFrame) e.getEntity();
            frame.setVisible(false);
        }
    }

[tender shard]

Dont use display names to identify items

[native bramble]

now im experimenting with localizedname

[tender shard]

Use pdc tags

[native bramble]

man

read pls

[native bramble]

..

i know that i should use NOT name, like custommodeldata and another

[tender shard]

I did read your code and you use the items name

[native bramble]

not code

read what i want to do

[tender shard]

I did

[native bramble]

i cant get itemmeta of itemframe

[tender shard]

You still keep using the itemmeta‘s name

[native bramble]

which is placed

[tender shard]

Ofc not, its not an itemstack

[young knoll]

It’s an entity

[native bramble]

so

[young knoll]

Entities can also have pdc

[native bramble]

yes i know

https://hub.spigotmc.org/javadocs/spigot/org/bukkit/persistence/PersistentDataContainer.html ?

[young knoll]

Yes

[smoky anchor]

onPlayerDropItems(PotionSplashEvent e)
A bit confusing method name

[native bramble]

i was trying other methods

[smoky anchor]

I assume you will try to implement something like:
When player breaks item frame, check if it is the custom "invisible" item frame, if so give player the custom "invisible" item frame item.
For that you can use PDC as mentioned before.

[native bramble]

i was tried pdc and trying now but i get null when checks the item pdc

private static final NamespacedKey invisibleKey = new NamespacedKey(WhitePlus.getInstance(), "invisible");
    public static void changeFrameVisibility(Entity entity) {
        if(entity == null) return;
        if(entity.getType() == EntityType.ITEM_FRAME){
            ItemFrame frame = (ItemFrame) entity;
            frame.setVisible(false);
            frame.setCustomName(itemFrameName);
            frame.getPersistentDataContainer().set(invisibleKey, PersistentDataType.BYTE, (byte) 1);
        } else if (entity.getType() == EntityType.GLOW_ITEM_FRAME) {
            GlowItemFrame frame = (GlowItemFrame) entity;
            frame.setVisible(false);
            frame.setCustomName(glowItemFrameName);
            frame.getPersistentDataContainer().set(invisibleKey, PersistentDataType.BYTE, (byte) 1);
        }
    }```

@EventHandler
    public void onPlayerPlaceFrame(HangingPlaceEvent e){
        ItemStack item = e.getItemStack();
        if(item == null) return;
        if(item.getType() == Material.ITEM_FRAME){
            ItemFrame frame = (ItemFrame) e.getEntity();
            System.out.println(frame.getPersistentDataContainer()
                    .get(InvisibleItemFramesMain.getInvisibleKey(), PersistentDataType.BYTE));
            //if()){
            //    frame.setVisible(false);
            //}

        } else if (item.getType() == Material.GLOW_ITEM_FRAME) {
            GlowItemFrame frame = (GlowItemFrame) e.getEntity();
            frame.setVisible(false);
        }
    }

[smoky anchor]

where are you getting it and is it an error or a warning?

[native bramble]

or pdc not saves after block breaks?

[native bramble]

its null

[smoky anchor]

that.. doesn't explain anything

[native bramble]

here i have line: System.out.println(frame.getPersistentDataContainer() .get(InvisibleItemFramesMain.getInvisibleKey(), PersistentDataType.BYTE));

and it output null

always

[smoky anchor]

ah ok gotcha

Uuhh you need to get the PDC from the item, not the entity

[native bramble]

can i get item of entity?

no, i think

or u about ItemFrame, not ItemStack?

ohh, no

[smoky anchor]

get pdc from ```java
ItemStack item = e.getItemStack();

wait am I doing a dumb
guys help XD

[remote swallow]

item meta

[native bramble]

i cant get

[smoky anchor]

you can
you have the item

[native bramble]

but it always null

i was trying this

[smoky anchor]

it can't be null unless it's air

[native bramble]

u want to get itemmeta from ItemFrame?

[smoky anchor]

no, from your item

[native bramble]

in which event?

[smoky anchor]

so you can check if it is your custom item

[native bramble]

hangingplace?

[smoky anchor]

this one

[native bramble]

man

i cant create custom item

custom item is creating in onPlayerCastSplashPotion

in PotionSplashEvent

sry

problem is

i cant do nothing with placed itemframe except of setCustomName

[smoky anchor]

What is this method supposed to do

I might be misunderstanding

[native bramble]

i wanted to check item name, check if this item was renamed by plugin, not by player and frame.setVisible(true) if true

[smoky anchor]

Ok, how do players get this item

[native bramble]

oh sry

i didnt send one more event

my sry

@EventHandler
    public void onPlayerCastSplashPotion(PotionSplashEvent e){
        if(((PotionMeta)e.getPotion().getItem().getItemMeta())
                .getBasePotionData().getType() != PotionType.INVISIBILITY) return;
        for(Entity entity: e.getPotion().getNearbyEntities(4,4,4)){
            InvisibleItemFramesMain.changeFrameVisibility(entity);
        }

    }

[native bramble]

changeFrameVisibility is this

player cast splash potion on default item frames -> default item frames become invisible item frames

[smoky anchor]

yes, that looks correct
so does changeFrameVisibility

[native bramble]

so that because my question was "How check if item was renamed by plugin?"

[smoky anchor]

This event checks when player places the itemframe with the item
how can player get this item

Is it by breaking the invisible item frame ?
If so, then you're missing an event

[native bramble]

if player want to get invisible items, he need to cast splash potion (invisible) to item frames, which will be setVisible(false) and than player can break itemframe to get

[native bramble]

yeah

[smoky anchor]

ok so.. create that event now

[native bramble]

i was trying to check HangingBreakEvent

and check if itemframe was invisible

like setVisible(false)

but i cant

[smoky anchor]

send what you tried

[umbral ridge]

In Material class in values(), is it possible to extract Blocks only?

and not eg. spawn eggs books, eggs, etc

[remote swallow]

stream it, filter to isBlock

do that in a static final field too thanks

[umbral ridge]

Oh that's a great idea lol

[native bramble]

@smoky anchor ty, its working with hangingbreakevent

at first i didnt see that its inherits getEntity from hangingevent

[smoky anchor]

ok.. so now uhm... you send it here and..
who here knows how to change the item the entity drops

My idea is to cancel the event, destroy the entity and spawn a new item.

[native bramble]

i will send what i write

[silver robin]

Entity death event has a loot table that you can modify afaik

[icy beacon]

i'm dying to find out why this is not fucking working

  fun update(query: String, vararg arguments: Any) {
    println("A")
    connect()
    println("B")

    val statement = connection.prepareStatement(query)
    println("C")
    arguments.forEachIndexed { index, argument ->
      println("D ${index+1} $argument")
      statement.setObject(index + 1, argument)
    }
    println("E")

    statement.executeUpdate()
  }

it never outputs "E", and moreover it halts the code (e.g.):

    CompletableFuture.supplyAsync {
      println(1)
      plugin.database.update(Commands.ADD_PLAYER_IF_NOT_EXISTS, uuid)

      println(2) // never happens
      // *snip*
    }

command in question:

    const val ADD_PLAYER_IF_NOT_EXISTS = """
      INSERT IGNORE INTO kitpvp (uuid, locale, kills, deaths, playtime, totalxp)
      VALUES ('?', 'en_US', 0, 0, 0, 0);
    """

please help me i'm going insane

[smoky anchor]

wouldn't HangingBreakEvent override that ?

[silver robin]

I never used java mysql, only in python, where parametrized queries used just a question marks without the quotation marks so maybe thats the problem, it's possibly trying to insert a literal question mark into the uuid field in your mysql?

[icy beacon]

it could be

[remote swallow]

the question mark would be replaced with hikari most likely

[silver robin]

Triggered when a hanging entity is removed
to be fair I never heard of entities hanging in Minecraft, so i'm not sure, I just wanted to answer the original question

[smoky anchor]

GlowItemFrame, ItemFrame, LeashHitch, Painting

[icy beacon]

yes, indeed, the question mark in quotations was the problem, thanks a lot haha

another problem that i've been encountering is that i can't seem to get resultsets to actually return what i need, it gets stuck again:

val localeResultSet = plugin.database.fetch(Commands.GET_LOCALE, uuid)
println(2.05)
println(localeResultSet.getObject(1)) // this is never printed

command is in the attachment and here:

const val GET_LOCALE = """
  SELECT locale
  FROM kitpvp
  WHERE uuid = ?;
"""

(the fetch function should be working i think, i debugged it and it goes through successfully, but here it is just in case)

  fun fetch(query: String, vararg arguments: Any): ResultSet {
    connect()

    val statement = connection.prepareStatement(query)
    arguments.forEachIndexed { index, argument ->
      statement.setObject(index + 1, argument)
    }

    return statement.executeQuery()
  }

[echo basalt]

localeResultSet.next()

[icy beacon]

oh let me try that

[hazy parrot]

Just friendly reminder, as kotlin doesn't require you to catch exceptions, always do it so you can evade situations like this

Sqlexception should be thrown, that is why your code "stopped" working

[icy beacon]

oh, i assumed that when it's not caught, it's just thrown and the stack trace is outputted

will keep that in mind, ty

[hazy parrot]

Iirc that is case for runtime exceptions, might be wrong

[icy beacon]

it very well could be

[icy beacon]

yup, that's what i forgot to do

thanks!

[tender shard]

that's a PreparedStatement and you should rather be worried if you see values being added without those

[echo basalt]

Gotta love having random people following me on git

You look at their profile and it's just some kid from egypt with a tiktok bot made in python

[silver robin]

i'd like to recommend (if possible, before production) to store uuids as BINARY(16) (to save space and possibly use faster indexing on uuids) mysql INSERT INTO my_table(uuid) VALUES (unhex(replace(?, '-', '')))

[silver robin]

isn't mysql engine the one parsing the parameters instead of java library (so like that's why you cannot use parametrized queries as table names for example)?

[echo basalt]

Makes it harder to debug

[icy beacon]

i'll consider that, ty

i think the project will undergo a lot of optimisation before prod

i'm just getting it to work now

[silver robin]

how so? mysql client will show them as large hexadecimal numbers, and you can always use SELECT HEX(a), ... to convert it back to (non-dashed) uuid after querying

[echo basalt]

Just debugging tables in general

[tender shard]

String sql = "SELECT * FROM users WHERE user = " + userName;

if "userName" is mfnalex; DROP TABLE users then RIP

using preparedstatements, this cannot happen

[echo basalt]

^ sql injection is the term for this

[tender shard]

hence you do SELECT * FROM users WHERE user = ? and then it'll auto escape my "username"

[silver robin]

I understand that lmao

wait what was my message about

ah, the parametrized queries
seems like there's a whole object for those prepated statements in java

[worthy moat]

Hey I saved a HashMap in my YML with <ENUM, Object> .... It has a Problem with the Enum

org.bukkit.configuration.InvalidConfigurationException: Global tag is not allowed: tag:yaml.org,2002:de.marvn.alphablock.alphawars.util.objects.TeamType
 in 'reader', line 5, column 5:
        &id001 !!de.marvn.alphablock.alp ...```

How can I serialize Enums?

[tender shard]

save their names instead of the actual instance

turn your map into a String,Object

[worthy moat]

ok

[tender shard]

example

    {
        // Original map: Map<Material,Integer>
        Map<Material,Integer> map = new HashMap<>();
        map.put(Material.DIRT, 1);
        map.put(Material.STONE, 2);

        // Turn to Map<String,Integer>
        Map<String,Integer> stringMap = map.entrySet().stream().collect(Collectors.toMap(e -> e.getKey().name(), Map.Entry::getValue));
        
        // Turn it back into the original map:
        Map<Material,Integer> map2 = stringMap.entrySet().stream().collect(Collectors.toMap(e -> Material.valueOf(e.getKey()), Map.Entry::getValue));
    }

[silver robin]

sorry for bringing this back now, but just randomly intellij started decompiling the jar again, when I click Download Sources it says Sources not found for: org.spigotmc:spigot:1.16.5-R0.1-SNAPSHOT, and Choose Sources opens up a file dialog, isn't that stuff supposed to be automatic now?

[tender shard]

there is no sources jar for spigot

[silver robin]

huh? I swear they were loaded (the same docs comments as in the javadoc)

[tender shard]

the javadocs yes, but not the sources

[fluid river]

is a = b + c actually compiling to temp = b, temp = temp + c, a = temp?

[silver robin]

wait i'll give an example
this is the bukkit Vector class, now that I put spigot-api as dependency in pom.xml (instead of just 'spigot'), it has comments
and the arguments of every function are nice and not var1, var2...
where's that coming from then?

[native bramble]

@smoky anchor https://pastebin.com/pkP777Xe

[smoky anchor]

Oh that actually looks good!
Small suggestion for onPlayerBreakFrame and onPlayerPlaceFrame

if(itemStack.getType() == Material.ITEM_FRAME || itemStack.getType() == Material.GLOW_ITEM_FRAME)```
Casting to `ItemFrame` is enough since `GlowItemFrame` extends `ItemFrame`

[native bramble]

ohh, thank u

[smoky anchor]

Otherwise, does it work as you expect ?

[native bramble]

yeah

[smoky anchor]

Great!

[native bramble]

also its works nice with items in frame

[quaint mantle]

Hello, Is there any simple way of checking if an entity is "inside" a location?
I've tried checking entity bounding box, but didn't work as expected

[tender shard]

wdym with "didnt work as expected"?

[quaint mantle]

Well, it doesn't work, I check if the boundingbox contains the location, but doesn't work

AtomicBoolean work = new AtomicBoolean(true);
            for (int i = 0; i < distance; i++) {
                if (!work.get()) break;

                int currentI = i;
                scheduler.runTaskLater((task) -> {
                    double offsetX = currentI * projectileDirection.getX();
                    double offsetY = currentI * projectileDirection.getY();
                    double offsetZ = currentI * projectileDirection.getZ();

                    Location particleLocation = startLocation.clone().add(offsetX, offsetY, offsetZ);
                    Block block = particleLocation.getBlock();
                    if (!block.getType().name().contains("AIR")) {
                        work.set(false);
                        ProjectileHitEvent event = new ProjectileHitEvent(magicTrace, block);
                        server.getPluginManager().callEvent(event);

                        return;
                    }

                    Entity hitEntity = null;
                    for (Entity ent : world.getEntities()) {
                        if (ent.getBoundingBox().contains(particleLocation.getX(), particleLocation.getY(), particleLocation.getZ())) {
                            hitEntity = ent;
                            break;
                        }
                    }
                    if (hitEntity != null) {
                        work.set(false);
                        ProjectileHitEvent event = new ProjectileHitEvent(magicTrace, hitEntity);
                        server.getPluginManager().callEvent(event);

                        return;
                    }

                    world.spawnParticle(Particle.CRIT, particleLocation, 10, 0.15, 0.15, 0.15, 0);
                    world.spawnParticle(Particle.EGG_CRACK, particleLocation, 2, 0, 0, 0, 0);
                }, magicTrace.tracePeriod() * i);
            }

[tender shard]

why are you checking if the material contains "AIR"?

OAK_STAIRS

check if the material .isAir()

what are actually trying to do btw?

[quaint mantle]

Yes, that's right

I don't know where my mind is

[quaint mantle]

I'm spawning like a "magic" trace

Let me show you

It should stop when it hits an entity, and call the "ProjectileHitEvent"

But it doesn't

That's the ProjectileHitEvent

@EventHandler(priority = EventPriority.LOWEST)
    public void onEntityHit(ProjectileHitEvent e) {
        Projectile projectile = e.getEntity();
        if (projectile instanceof MagicTrace trace) {
            CraftMagicTrace cmt = (CraftMagicTrace) trace;

            Entity hitEntity = e.getHitEntity();
            if (hitEntity instanceof LivingEntity living) {
                e.setCancelled(true);

                double tracePeriod = trace.tracePeriod();
                double baseDamage = cmt.getHandle().getBaseDamage();

                AttributeInstance attribute = living.getAttribute(Attribute.GENERIC_MAX_HEALTH);
                if (attribute != null) {
                    double scaledTrace = attribute.getBaseValue() / tracePeriod;
                    double scaledDamage = baseDamage * scaledTrace;

                    living.damage(scaledDamage, projectile);
                }
            }

            cmt.getHandle().remove(net.minecraft.world.entity.Entity.RemovalReason.KILLED);
        }
    }

Just to clarify, CraftMagicTrace and MagicTrace are just "dummy" classes I created modifying spigot source code

CraftMagicTrace

public class CraftMagicTrace extends CraftArrow implements MagicTrace {

    private long speed = 0L;

    public CraftMagicTrace(CraftServer server, EntityTippedArrow entity) {
        super(server, entity);
    }

    @Override
    public EntityTippedArrow getHandle() {
        return (EntityTippedArrow) entity;
    }

    @Override
    public String toString() {
        return "CraftMagicTrace";
    }

    @Override
    public EntityType getType() {
        return EntityType.ARROW;
    }

    /**
     * Set the magic trace speed
     *
     * @param speed the speed
     */
    @Override
    public void setTracePeriod(final long speed) {
        this.speed = speed;
    }

    /**
     * Get the magic trace speed
     *
     * @return the magic trace speed
     */
    @Override
    public long tracePeriod() {
        return speed;
    }
}

MagicTrace

/**
 * Represents a magic trace
 */
public interface MagicTrace extends DummyProjectile {

    /**
     * Set the magic trace speed
     *
     * @param speed the speed
     */
    void setTracePeriod(final long speed);

    /**
     * Get the magic trace speed
     *
     * @return the magic trace speed
     */
    long tracePeriod();
}

[young knoll]

🙃

[worthy moat]

wHow could I make a Vote System? Players should Vote for something and then I pick the thing with the most votes
how could I achieve this?

[tender shard]

create a Map<Whatever,Integer> where Whatever is what they voted vor, and integer is the amounts of votes it got

and another set with the UUID of people who already voted

or a Map<Whatever,Set<UUID>>

[keen charm]

But that data would last temporarily

If you need something for a bigger network, like it should get saved on even restarts, you need to use databases

[tender shard]

i'd just save the map to a yaml

[quaint mantle]

Wasn't yaml not a database and so it shouldn't be use as it?

[tender shard]

yaml is for serializing whatever you want to serialize

[quaint mantle]

I would use json to store data instead

[tender shard]

well json is valid yaml, doesn't really make any difference

[quaint mantle]

I know, but idk, I feel like json is "better" even though both are valid

||I'm a JSON lover||

[tender shard]

idk imho json is just yaml in "hard to edit" lol

[quaint mantle]

json is not hard to edit 😔

[echo basalt]

no point in doing all of this

World#rayTrace

Make a fancy predicate and all

[tender shard]

harder than yaml. forget a "quote" or a comma or a { or a [and it's broken

[worthy moat]

And how would I check if someone already voted ? So I can remove the old map vote?

[tender shard]

by looping over the map's entryset and check whether any of the value sets contains the UUID

[worthy moat]

ok thx

[young knoll]

map.containsKey

Silly alex

Ah wait it's a value

Could use a bimap ig

[tender shard]

    private final Map<String, Set<UUID>> votes = new HashMap<>();
    
    public void addVote(String name, UUID uuid) {
        removeVote(uuid);
        Set<UUID> uuids = votes.computeIfAbsent(name, __ -> new HashSet<>());
        uuids.add(uuid);
    }
    
    public boolean hasVoted(UUID uuid) {
        return votes.values().stream().anyMatch(uuids -> uuids.contains(uuid));
    }
    
    public void removeVote(UUID uuid) {
        votes.values().forEach(uuids -> uuids.remove(uuid));
    }

idk sth like that

[quaint mantle]

RayTraceResult doesn't has a method to fetch "all" the hit entities

[tender shard]

the predicate could just always return false to catch all entities but that's a hacky solution

[echo basalt]

You want to get all the entities in a bounding box or something?

[young knoll]

There's a method for that

[quaint mantle]

I want to fetch all entities that are in the trace

[young knoll]

https://hub.spigotmc.org/javadocs/spigot/org/bukkit/World.html#getNearbyEntities(org.bukkit.util.BoundingBox)

[quaint mantle]

Doesn't RayTraceResult #getEntity return always the latest/first hit entity only?

[echo basalt]

It does but that's what the predicate is for

You can just make a basic for loop, range checks and have an entity collection

[tender shard]

    private final class BadPredicate implements Predicate<Entity> {

        private final List<Entity> hitEntities = new ArrayList<>();
        private final Predicate<Entity> predicate;

        private BadPredicate(Predicate<Entity> predicate) {
            this.predicate = predicate;
        }

        @Override
        public boolean test(Entity entity) {
            if(predicate == null || predicate.test(entity)) {
                hitEntities.add(entity);
            }
            return false;
        }

        public List<Entity> getHitEntities() {
            return hitEntities;
        }
    };

    {
        Player player = null;
        BadPredicate predicate = new BadPredicate(null);
        RayTraceResult ignored = player.getWorld().rayTrace(..., predicate);
        List<Entity> hitEntities = predicate.getHitEntities();
    }

very hacky solution

[young knoll]

lol

[echo basalt]

That seems like an icky solution

[quaint mantle]

Or like this?

List<Entity> tracedEntities = new ArrayList<>();
            world.rayTrace(startLocation, direction, distance, FluidCollisionMode.NEVER, true, 1, (ent) -> {
                tracedEntities.add(ent);
                return true;
            });

[tender shard]

yeah but it'll work just fine

[echo basalt]

Yeah but return false

[quaint mantle]

Aight

And the raytrace itself will stop when it hits a solid block right?

[echo basalt]

Yea

[river oracle]

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Duplicate key 1 (attempted merging values Enchantment[minecraft:unbreaking, DURABILITY] and Enchantment[minecraft:mending, MENDING]) wtf is this supposed to mean

oh nvm I get it now

I'm dumb

[tender shard]

Remember this one dude who always replied Objects.requireNonNull when someone posted a stacktrace

[worthy moat]

How can I get the arena by its biggest int?

[river oracle]

no who was that xD

IntellIJ really loves Objects.requireNonNull

[tender shard]

Stream the maps entryset, sort it with a custom comparator

[river oracle]

even though its kinda shit in most cases imho

[worthy moat]

custom comparator?

[tender shard]

Yes

[worthy moat]

whats that?

[zenith gate]

{
  "parent": "minecraft:item/handheld",
  "textures": {
    "layer0": "minecraft:item/stick"
  },
  "overrides": [
    {
      "predicate": {
        "custom_model_data": 2
      },
      "model": "minecraft:item/woh",
      "textures": {
        "layer0": "minecraft:item/woh"
      }
    },
    {
      "predicate": {
        "custom_model_data": 1
      },
      "model": "minecraft:item/BrokenWand",
      "textures": {
        "layer0": "minecraft:item/BrokenWand"
      }
    }
  ]
}

Why isn't this working? I am using a stick with a custom model data number, its applying the BrokenWand texture to both of the items. woh has its own texture called woh.png.

[river oracle]

do you even need a custom comparator their? pretty sure you can just use the default int one than reverse it for common sense ordering

[tender shard]

It must be in correct order

You got 2 before 1

[tender shard]

there's no builtin comparator for Map.Entry<String,Integer> though

[worthy moat]

How can I sort them if I stgream the entry set

[river oracle]

Stream#sorted

[tender shard]

    private String getHighestVote() {
        return votes.entrySet().stream().max(Comparator.comparingInt(entry -> entry.getValue().size())).map(Map.Entry::getKey).orElse(null);
    }

[worthy moat]

but this one doesnt sort with the highest int in the map

[river oracle]

you have to reverse it

[tender shard]

just use max(Comparator) on the stream ^

[river oracle]

oh :| I totally knew that

time to go fix my code

[worthy moat]

ah thx

[river oracle]

I can't believe I was doing Map<Integer, Enchantment> smh I'ma throw myself off the highest cliff in my state

[onyx fjord]

arent enchants a multimap

[tender shard]

no? every enchantment can only have one level

[zenith gate]

So i reordered it, now it just only shows the black and purple texture. It wont give the model number 2 the texture. I did try my new texture on data model number 1 and it worked, its just for the 2nd id of stick, no texture is displayed.

[tender shard]

BrokenWand probably won't work, it must be all lowercase iirc

[zenith gate]

that one does work

its just WoH

for the Custom Data Model 2 nothing ever gets set.

both my PNGs do work, its just the 2nd data model wont show.

[tender shard]

idk, hard to tell without having your full resource pack

[gleaming grove]

Does minecraft provides now some featue I can use do draw mesh(3d box) outline, or still paricles are the only option?

[rare rover]

Particles

[tender shard]

or blockdisplays if you wanna make it fancy

[gleaming grove]

that sounds fun, hmm maybe I can use structure block, to get this nice outline

I've never use that stuff has spigot some API for structure blocks?

[tender shard]

yes

I'd try to experiment with glowing blockdisplays though

you only set the placeholders once, in the for loop in line 17

you would have to call that in your scheduled runnable everytime instead

but you always reuse the same strings

imagine you do this:

1. my string is "name is %player_name%"
2. apply placeholders to that string -> "name is mfnalex"
3. now you tell FastBoard once per second "set scoreboard to "name is mfnalex""

ofc it will never change afterwards

you gotta do step 2 inside the scheduler task, too

[worldly ingot]

We have API for structure blocks, yes, but you can't really control the wireframe outline, at least as far as I'm aware

[gleaming grove]

right, so I stick to mfnalex glowing blockdisplays idea

[sour folio]

how can i use a custom hexcode for a chatcolor?

[worthy moat]

Got a problem

    private Map<Arena, Integer> votes = new ConcurrentHashMap<>();
    private Map<Arena, List<UUID>> whoVotedFor = new ConcurrentHashMap<>();

    public void vote(Arena arena, Player p) {

        whoVotedFor.forEach((votedArena, uuids) -> {

            if (arena == votedArena) {
                MessageManager.sendMessage(p, "<red>You already voted for this map");
                return;
            }

            if (uuids.contains(p.getUniqueId())) {
                votes.put(votedArena, votes.get(votedArena) - 1);
            }
        });

        if (votes.get(arena) == null) {
            votes.put(arena, 1);
            whoVotedFor.put(arena, List.of(p.getUniqueId()));
            return;
        }

        votes.put(arena, votes.get(arena) + 1);
        var list = whoVotedFor.get(arena);
        list.add(p.getUniqueId());
        whoVotedFor.put(arena, list);
        MessageManager.sendMessage(p, "<green>Sucessfully voted for <aqua><bold>" + arena.getName());

        setChosenArena(votes.entrySet().stream().max(Comparator.comparingInt(Map.Entry::getValue)).map(Map.Entry::getKey).orElse(null));
    }```

[tender shard]

https://javadoc.io/doc/net.md-5/bungeecord-chat/latest/net/md_5/bungee/api/ChatColor.html#of-java.awt.Color-

[sour folio]

ty

[worthy moat]

the 3. Last Lines gives me an null

java.lang.UnsupportedOperationException: null

[tender shard]

the third last line is empty

[worthy moat]

yeah

Thats the thing

at de.marvn.alphablock.alphawars.cache.MiniGame.vote(MiniGame.java:54) ~[AlphaWars-1.0-all.jar:?]

[ivory sleet]

This is not good

I mean sure you use CHM

But like, no atomicity

[worthy moat]

what?

[ivory sleet]

And taking advantage of the higher order functions that are specially implemented

[tender shard]

and what is line 54?

[worthy moat]

how could I fix this?

[worthy moat]

nothing

[tender shard]

then your .jar doesn't match the source code

recompile, restart server, try again

[worthy moat]

Ok so the error lies in this code

As soon as I change my vote this error pops up

AH now the line is correct

list.add(p.getUniqueId()); this is null

[twilit roost]

how could I limit Vector angle?

so player couldn't launch themself straight up? but only to 70 degrees?

[ivory sleet]

The vector has some rotation methods, you can use those in combination with some checks

[worthy moat]

Can I do an Map<Arena, List<UUIDS>> and then just get the Arena with the most UUIDs?

[ivory sleet]

Sounds like you could use a tree map in that case

[tender shard]

isnt that what you're already doing?

well Set, List, doesn't matter

[worthy moat]

no I had two maps

one with an integer

[tender shard]

why did you have two?

[worthy moat]

and one with the players

[worthy moat]

you mentioned it xD

[tender shard]

I told you you can do either/or, and then I sent you code that uses a Map<Arena,Set<UUID>>

well I used a string instead of arena

[worthy moat]

oh haha

    private Arena chosenArena;

    public Map<Arena, List<UUID>> getVotes() {
        return votes;
    }

    private Map<Arena, List<UUID>> votes = new ConcurrentHashMap<>();

    public void vote(Arena arena, Player p) {
        setChosenArena(arena);
        p.sendMessage(arena.getName());

        votes.values().forEach(list-> {
            if (list.contains(p.getUniqueId())) {
                list.remove(p.getUniqueId());
            }
        });

        if (votes.get(arena).isEmpty()) {
            votes.put(arena, List.of(p.getUniqueId()));
            MessageManager.sendMessage(p, "<green>Sucessfully voted for <aqua><bold>" + arena.getName());
            return;
        }

        var list = votes.get(arena);
        list.add(p.getUniqueId());
        votes.put(arena, list);
        MessageManager.sendMessage(p, "<green>Sucessfully voted for <aqua><bold>" + arena.getName());

        setChosenArena(votes.entrySet().stream().max(Comparator.comparingInt(entry -> entry.getValue().size())).map(Map.Entry::getKey).orElse(null));```

[vital sandal]

what is the event which is called even cactus naturally break or cane break if break from the lowest layer?

[worthy moat]

Do you see any logic errors in thsi new vote thing?

[vital sandal]

votes.values().forEach(list-> {
            if (list.contains(p.getUniqueId())) {
                list.remove(p.getUniqueId());
            }
        });

[worthy moat]

whats with that?

[vital sandal]

1> I don't think that is a great way to remove items without iterators
2> you can just do remove without checking if it exist

[trim creek]

Do you want a NPE?

[worthy moat]

what iterators whould I use?

[trim creek]

If so, then do not check if it exists or not 😹

[vital sandal]

It will skip if the key is not there

[worthy moat]

I am getting a UnsupportedOperationException with a normal List<>

Hows That

[vital sandal]

https://stackoverflow.com/questions/223918/iterating-through-a-collection-avoiding-concurrentmodificationexception-when-re

[icy bone]

Question, im using TabExecutor to make my commands more cleaner, for example now it will auto complete all options. So this way the user knows what kind of options there are. But if noticed that when my options are done (for example: /seek [player/mob] <- for example my options follow up by [close/far]) i noticed it always try to put a username on the end. So with the example given, i use /seek player far, then it will give the auto complete option to add players form the server. Is there a way to block this?

Oh i fixed it by returning an empty list when checking for the last args, but is there a nicer way?

[tender shard]

there is no "normal" list, list is an interface

[worthy moat]

I just used ArrayList and now it works

If I save a Location in a world in my config and then restart my server it tells me this

[quaint mantle]

That's true
Lists uses array objects (object[])
(At least ArrayList, the most common array interface)

[worthy moat]

[17:15:47 ERROR]: [org.bukkit.configuration.serialization.ConfigurationSerialization] Could not call method 'public static org.bukkit.Location org.bukkit.Location.deserialize(java.util.Map)' of class org.bukkit.Location for deserialization
java.lang.IllegalArgumentException: unknown world```

How could I fix this?

[quaint mantle]

Are you trying to store a location?

[worthy moat]

I already stored one

[quaint mantle]

Then are you trying to load it?

How are you storing it btw?

Ah, yes, you are trying to load a location

Why don't you store the values you need separately, then create a location instance out of those values?

Like storing the world UUID/name, X, Y, Z, yaw and pitch

Then create a location with those values

Bukkit#getServer#getWorld(UUID)

Bukkit#getServer#getWorld(String)

Check if the world is null, and if so, it means the world no longer exists

So the location is not longer "valid"

[eternal oxide]

You probably accessed your config too early, before worlds are loaded

[sage patio]

any idea how i can hide this icons in IntelliJ?

adds a kilometer of space after each line number

[worthy moat]

yml

[torn shuttle]

I swear...

[worthy moat]

Too late xD

How can I load every world?

[eternal oxide]

what worlds?

[worthy moat]

The worlds I stored the locations from

[eternal oxide]

What worlds? Multiverse or default?

[sterile token]

Its a mess working with self worlds load, i remember i used to use Slime World Manager. When working for mini games which required loading custom maps / worlds

[worthy moat]

Slime World Managee

Ok thx

[umbral ridge]

XD

[sterile token]

But i recommend it for big projects where you need to load many worlds and work with them around. Specially for mini games where its a mess

[gleaming grove]

Why m'I getting out of memory exception? Sever is only using 2GB of ram

[sterile token]

Probably an infinity loop

[gleaming grove]

That would be StackOverflowException

[tender shard]

once you replaced the lines in replacedLines, they are done

use a separate array or list

String[] original = new String[] { "name: %player_name%" };

// in scheduler:
String[] replaced = new String[original.length];
for(int i = 0; i < original.length; i++) {
  replaced[i] = PlaceholderAPI.setPlaceholders(player, original[i]);
}
FastBoard.updateBoard(board, replaced);

sth like this

tl;dr: keep the "original" lines that contain the placeholders

[gleaming grove]

nvm ye it's infinite loop

[torn shuttle]

hey uh

when I do $ java -jar BuildTools.jar --rev 1.20 --remapped I'm getting 1.20.1, is anyone else experiencing this?

[young knoll]

https://hub.spigotmc.org/jira/browse/BUILDTOOLS-658

See MD's response

[torn shuttle]

erm

how do I do the mappings then

if one field and one method were added then the reobfuscation won't match somewhere, right?

[vital sandal]

I want to change blockdrop of some specific blocks (like special canes)

what are the events should I listen to :l

I got the idea but just wanna hear from you guys

[chrome beacon]

MD said no mappings changed

[tender shard]

well if 1.20 builds 1.20.1, then nobody will be using 1.20 anyway, but 1.20.1 too

[torn shuttle]

:'^)

[tender shard]

yikes why do people never update

yeah anyway md said "No names changed"

[torn shuttle]

I mean is this a surprise to literally any dev that has been doing this for more than a month

[ivory sleet]

Truly heartbreaking

[torn shuttle]

well then if md said it... whatever changed is probably not what I want to mess with anyway

I swear I did not have this much white hair when I first started looking at NMS code

[worthy moat]

I am currently sitting on a BedWars minigame

[worthy moat]

So I just need to add the Worlds in the world.yml oder how do I use it to load my worlds I use in my Plug-in?

[eternal oxide]

your plugin shoudl load it's own worlds, the same way it created them

[quaint mantle]

Shout out to rick0wens

[chilly hearth]

Howe to make custom item by using itemstack

[eternal oxide]

create a new ItemStack, add a pdc tag, done. Custom item

[tender shard]

wdym? custom texture? custom behaviour? or just a stick with "my fancy item" name?

[chilly hearth]

Consider it a stick ig

[chilly hearth]

We can make it's utils right

[chilly hearth]

Yes custom behaviour

[eternal oxide]

as alex said, it really depends on what you want to do with your item

[tender shard]

then as elgar said, apply a custom PDC tag to identify your item

thethen listen to the specific events, e.g. PlayerInteractEvent, and check if the item in use has your PDC tag

if yes, do your stuff

[chilly hearth]

Oh what will be the event of using the item?

[tender shard]

depends what you consider "using"

[chilly hearth]

Ok what if I Wana spawn thunder upon right clicking it

[tender shard]

PlayerInteractEvent

then check if the action is RIGHT_CLICK_AIR or RIGHT_CLICK_BLOCK

[worthy moat]

It doesnt create them. I add them into the package...Loaded them with multiverse and placed my spawn locations

[chilly hearth]

@tender shard one more thing how do I make mobs attract players

[tender shard]

tell your players that the mobs are cute anime girls

[worthy moat]

hahahahahaha

[worthy moat]

package = Server dir sry

[eternal oxide]

To get a WorldCreator Instance, then call createWorld().https://hub.spigotmc.org/javadocs/spigot/org/bukkit/WorldCreator.html#<init>(java.lang.String)

that will load whatever world you specify

[worthy moat]

so I need to add those worlds manually

[eternal oxide]

are you writing a plugin?

[sage patio]

if i have a FileConfiguration variable, its not getting updated when the file is changed right?

[tender shard]

correct

[sage patio]

thanks

[worthy moat]

yes

[eternal oxide]

This will load (or create if it doesn't exist)java WorldCreator("yourWorldName").createWorld()

[worthy moat]

hmm ok

thx

[eternal oxide]

it may be WorldCreator.name("... I forget

[worthy moat]

Are you talking about SWM or original spigot

[eternal oxide]

no idea what SWM is. This is Spigot

[worthy moat]

Slime World Manager

[eternal oxide]

Spigot

[tender shard]

both, it's either new WorldCreator(String) or static WorldCreator.name(...)

[eternal oxide]

no point in using a manager to load your own worlds

[worthy moat]

ok

[sage patio]

any idea why placeholder is not getting the updated value?

but the same method in a command gets the updated one

[tender shard]

slime worlds use another region format, it's different from normal worlds

[worthy moat]

hmm ok

[eternal oxide]

Yeah, never used it

[sage patio]

case test is the command and balance_comma is the placeholder

[worthy moat]

You mean that? createWorld().https://hub.spigotmc.org/javadocs/spigot/org/bukkit/WorldCreator.html#<init>(java.lang.String)

[tender shard]

how does your PAPI code look like

[sage patio]

public class PAPIExpansion extends PlaceholderExpansion {
    public PAPIExpansion(Plugin plugin) {
        Plugin p = NLBank.getInstance();
    }

    @Override
    public @NotNull String getIdentifier() {
        return "nlbank";
    }

    @Override
    public @NotNull String getAuthor() {
        return "xii69";
    }

    @Override
    public @NotNull String getVersion() {
        return "1.0.0";
    }

    @Override
    public boolean canRegister() {
        return true;
    }

    @Override
    public boolean persist() {
        return true;
    }

    @Override
    public @Nullable String onPlaceholderRequest(Player player, @NotNull String params) {
        switch (params) {
            case "balance" -> {
                return String.valueOf(AccountUtils.getBalance(player.getName()));
            }
            case "balance_comma" -> {
                return Utils.formatNumber(AccountUtils.getBalance(player.getName()));
            }
        }
        return null;
    }
}

[eternal oxide]

WorldCreator.name("customWorld").createWorld()

[modern badge]

Hello! Why, after canceling the InventoryClickEvent, the player can still put the item in the inventory by clicking frequently?

[worthy moat]

ok thx

[tender shard]

i dont really understand what oyu mean with "placeholder not getting the updated value"

[tender shard]

InventoryDragEvent

you know, like when you drag an item over 10 slots and it divides the stack into all those slots? the same can happen if they move the mouse over just one slot

[modern badge]

and how to find out from it that the player dragged the item in the inventory created using the script?

[sage patio]

using AccountUtils.getBalance in a Command returns the correct number from my config file, but using the same method (AccountUtils.getBalance) in a PlaceHolder using PAPI returns a value which it was on the first server boot

[tender shard]

by listening to InventoryDragEvent and doing the same stuff that you do in InventoryClickEvent

then your AccountUtils method must be messed up

[sage patio]

public static Integer getBalance(String player) {
        return NLBank.getFileManager().getConfig().getInt(player + ".balance");
    }

well this works on a command, but not on a placeholder?

[tender shard]

is it the same plugin? the command and the placeholder?

[sage patio]

yes

and i use papi parse for testing it

[tender shard]

what does getFileManager() do?

or getConfig() in that

[sage patio]

well returns a FileManager class, getConfig returns a FileConfiguration

is it because of i'm reloading my plugin using a plugin?

[tender shard]

yes probably. your PAPI extension keeps loaded because you return true for persistent(), and then it uses the old FileManager from your previous plugin instance

[sage patio]

any idea how i can fix it?

[tender shard]

restart your server

[sage patio]

maybe i just have to reboot the server

alright, thanks

[tender shard]

or at least unregister your extension in onDisable

[worthy moat]

        arenas.getArenas().forEach((file, fileConfiguration) -> {
            var arena = (Arena) fileConfiguration.get("Arena");
            if (arena.getTeams() != null) {
                arena.getTeams().entrySet().stream().findFirst().ifPresent(teamTypeTeamEntry -> {
                    WorldCreator.name(teamTypeTeamEntry.getValue().getSpawnBlock().getWorld().getName()).createWorld();
                    Bukkit.getLogger().log(Level.INFO, "Sucessfully loaded " + teamTypeTeamEntry.getValue().getSpawnBlock().getWorld().getName());
                });
            }
        });``` So this should load my worlds?

[eternal oxide]

um? getSpawnBlock().getWorld().getName()

[worthy moat]

Yeah thats something from my Object

[eternal oxide]

is that a Bukkit world object?

[worthy moat]

Nope

My own

[eternal oxide]

ok

[worthy moat]

But this should work?

[modern badge]

@tender shard thanks

[eternal oxide]

seems a little overboard but shoudl work

[worthy moat]

Yeah i have to load all this like that...

[eternal oxide]

why only the first?

[worthy moat]

Because every team has the same world...I only need one

[eternal oxide]

ok

[tender shard]

if every team has the same world, then the world belongs to the arena and not the team, I guess

[worthy moat]

Yep...But I dont save the Worldname in my Arena object haha

[tender shard]

lol ok

[worthy moat]

Yeah xD

Dont want to store that extra if I already can get them somehow

ah got a new question

        ProtocolManager manager = AlphaWars.protocolManager;
        BlockPosition position = new BlockPosition(player.getLocation().getBlockX(), 255,
                player.getLocation().getBlockZ());

        PacketContainer blockChange = manager.createPacket(PacketType.Play.Server.BLOCK_CHANGE);
        blockChange.getBlockPositionModifier().write(0, position);
        blockChange.getBlockData().write(0, WrappedBlockData.createData(Material.OAK_WALL_SIGN));
        PacketContainer updateSign = manager.createPacket(PacketType.Play.Server.UPDATE_SIGN);
        updateSign.getBlockPositionModifier().write(0, position);
        updateSign.getChatComponentArrays().write(0, new WrappedChatComponent[]{WrappedChatComponent.fromText(lines[0]), WrappedChatComponent.fromText(lines[1]), WrappedChatComponent.fromText(lines[2]), WrappedChatComponent.fromText(lines[3])});
        PacketContainer open = manager.createPacket(PacketType.Play.Server.OPEN_SIGN_ENTITY);
        open.getBlockPositionModifier().write(0, position);

        manager.sendServerPacket(player, blockChange);
        manager.sendServerPacket(player, updateSign);
        manager.sendServerPacket(player, open);``` this is how I open a Sign Inv

But this SignInv is now despawning instantly

No errors nothing

It comes and goes

[chilly hearth]

Lmfao

[buoyant viper]

?stash for self

[undone axle]

https://hub.spigotmc.org/stash/

[chilly hearth]

No is there a way?

[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.

[chilly hearth]

Oh

[tender shard]

I dont get what you mean

[chilly hearth]

Like mobs follow players

[tender shard]

Add a custom pathfindergoal

That requires NMS though

[chilly hearth]

If they reach a certain radius

Nms?

[tender shard]

Internal minecraft code

?nms

[undone axle]

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

[tender shard]

Here‘s how to setup maven to use NMS

[chilly hearth]

Oh

Alr thx

[tender shard]

Jefflib also includes code for custom pathfinders if you dont wanna use NMS: https://github.com/JEFF-Media-GbR/JeffLib

You can extend this class https://hub.jeff-media.com/javadocs/jefflib/com/jeff_media/jefflib/ai/goal/CustomGoal.html

[worthy moat]

anyone else know how I can open an SignGUI?

[flint coyote]

https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/Player.html#openSign(org.bukkit.block.Sign)

[worthy moat]

yeah but I have to use a fake Sign

openSign needs a real sign

[flint coyote]

You will have to create a sign either way (could use packets aswell). You can despawn it. Whether you have to keep it "alive" while the GUI is open in order to get the SignChangeEvent is something you'd have to test.

[fluid river]

best way to check player entered a BoundingBox/Zone(not region)?

[worthy moat]

I didnt need to create the Sign in the world back in 1.8

[novel pendant]

Does anyone know of an effective way to make item displays and block displays in spigot?

[worthy moat]

After I migrated to 1.20 it instantly despawns

maby this is the issue

[flint coyote]

yeah afaik you need one now

[worthy moat]

How can I create a Sign with Spigot?

[flint coyote]

A real one or packet based?

[worthy moat]

a real one

[flint coyote]

Just use World#getBlockAt()#setType()

[worthy moat]

hmm

[flint coyote]

You can store the block in a variable and then cast it to a Sign once you changed its type

[tender shard]

maybe sending a blockchange to the client is enough

[flint coyote]

It is

[worthy moat]

        ProtocolManager manager = AlphaWars.protocolManager;
        BlockPosition position = new BlockPosition(player.getLocation().getBlockX(), 255,
                player.getLocation().getBlockZ());

        PacketContainer blockChange = manager.createPacket(PacketType.Play.Server.BLOCK_CHANGE);
        blockChange.getBlockPositionModifier().write(0, position);
        blockChange.getBlockData().write(0, WrappedBlockData.createData(Material.OAK_WALL_SIGN));
        PacketContainer updateSign = manager.createPacket(PacketType.Play.Server.TILE_ENTITY_DATA);
        updateSign.getBlockPositionModifier().write(0, position);
        updateSign.getChatComponentArrays().write(0, new WrappedChatComponent[]{WrappedChatComponent.fromText(lines[0]), WrappedChatComponent.fromText(lines[1]), WrappedChatComponent.fromText(lines[2]), WrappedChatComponent.fromText(lines[3])});
        PacketContainer open = manager.createPacket(PacketType.Play.Server.OPEN_SIGN_EDITOR);
        open.getBlockPositionModifier().write(0, position);

        manager.sendServerPacket(player, blockChange);
        manager.sendServerPacket(player, updateSign);
        manager.sendServerPacket(player, open);``` This is how I sent that

But the Sign despawns instantly

[flint coyote]

You can just use Player#sendBlockChange
https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/Player.html#sendBlockChange(org.bukkit.Location,org.bukkit.block.data.BlockData)

[eternal oxide]

if you are creating a sign using packets then it will disapear th einstant anyone interacts with it

[flint coyote]

From what I read a packet sign should be enough. I did not test that though

[flint coyote]

I just use

boundingBox.contains(loc.getX(), loc.getY(), loc.getZ())

[fluid river]

yeah and in which condition

playermove

runnable

[worthy moat]

So just send this instead of all the code above?

[flint coyote]

On a scheduler as I don't need a 1 tick precision

[fluid river]

i would have to loop through all players and all boxes then

[flint coyote]

Well and the openSign obviously

[flint coyote]

Yup that's why I do. And that's what WorldGuard did for years aswell

You can optimize it by tracking which chunks contain a region and whether they get loaded/unloaded

[fluid river]

worldguard is using some code under the hood

anyways

which can also be runnable

or moveevent

[flint coyote]

yeah they did optimize it. They did just loop for a long time though

[worthy moat]

so this and then the UpdateSign and Open Sign packet?

[flint coyote]

You can use the openSign() Function of Player. Don't need to deal with packets yourself.
If you want to set Text beforehand you will probably still require that packet. Or you create a real one and actually change the text

[worthy moat]

        player.sendBlockChange(player.getLocation(), );
        player.openSign();``` so just this?

[flint coyote]

If you complete the parameters, yes

[worthy moat]

How can I create a block instanze

because I need a BlockData

[flint coyote]

Bukkit.createBlockData(material)

[worthy moat]

thx

[chilly hearth]

?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.

[chilly hearth]

Where is that gif they removed it bruh

[chrome beacon]

?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. https://media.discordapp.net/attachments/694661573125472256/998143126373941248/6n0v4g.gif

[chrome beacon]

It's a different command 🙂

[worthy moat]

openSign needs a Sign instance...How can I make the BlockData to a Sign instance?

[worthy moat]

I love the gif with try and test it out

[flint coyote]

?tas

[undone axle]

https://tryitands.ee/

[worthy moat]

hahaha

[tender shard]

call createBlockState() on the blockdata

[chrome beacon]

You can take a look at or use https://github.com/Rapha149/SignGUI

[worthy moat]

This one does not return a Sign instance

[tender shard]

it does

[odd cobalt]

CraftWorld craftWorld = (CraftWorld) player.getLocation().getWorld();
EntityArmorStand armorStand = new EntityArmorStand(craftWorld.getHandle(), loc.getX(), loc.getY(), loc.getZ());

'EntityArmorStand(net.minecraft.world.level.World, double, double, double)' in 'net.minecraft.world.entity.decoration.EntityArmorStand' cannot be applied to '(net.minecraft.server.level.ServerLevel, double, double, double)'

please help me

[worthy moat]

        player.openSign((Sign) block.createBlockState());``` So like that? Do I need to cast that??

[tender shard]

yep

[odd cobalt]

1.20

[chrome beacon]

I guess that constructor doesn't exist

Open the class and take a look

Also why are you using unmapped

That's going to be a pain

?nms

[undone axle]

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

[worthy moat]

There is no event.setCancelled with BlockBreakEvent

[worthy moat]

java.lang.IllegalArgumentException: Sign must be placed

[young knoll]

There is

[worthy moat]

oh yeah

your right

[flint coyote]

meh, guess you'll actually need a real one

[worthy moat]

Then I just spawn one at 250 ig

[flint coyote]

or check what's used to determine it's placed and check that via reflection. I'd just find a spot between bedrock in spawn chunks and actually place it

[worthy moat]

via reflection?

[flint coyote]

It's probably a variable

and that will be private

[worthy moat]

I think the best case is to place a sign in the air above the player and then remove it after I needed it

[flint coyote]

You might be able to place it, open the GUI and instantly remove it

[tender shard]

sad noises

[worthy moat]

wouldnt that also remove the sign?

[flint coyote]

you mean the GUI?

Not sure, something you'd have to test

[worthy moat]

ok how do I spawn a block?

World.setBlock?

[flint coyote]

getblockat.settype

[worthy moat]

And this one places a block?

[flint coyote]

yes

Or you use setBlockData

[worthy moat]

        BlockData block = Bukkit.createBlockData(Material.OAK_SIGN);
        
        player.getWorld().setBlockData(
                player.getLocation().getBlockX(),
                200, player.getLocation().getBlockZ(),
                block
        );
        
        Sign sign = (Sign) block.createBlockState();
        sign.getSide(Side.FRONT).setLine(1, "^^^^");
        sign.getSide(Side.FRONT).setLine(2, "Enter how many");
        sign.getSide(Side.FRONT).setLine(3, "players per team");
        player.sendBlockChange(player.getLocation(), block);
        player.openSign(sign, Side.FRONT);``` Like that? Lets try

It does spawn the sign but still an error that it must be placed

[tender shard]

just set the sign to the world, call openSign, and one line later, remove the sign again

[worthy moat]

thats what the code already does except removing it

But the error persists

[flint coyote]

No the code only sends packets

it never actually places it

[worthy moat]

setBlockData does

It spawns and flies in the world

[flint coyote]

don't see that anywhere up there

[eternal night]

createBlockState creates a virtual block state

[flint coyote]

oh nvm I'm blind lol

[eternal night]

you need to actively retrieve the block state of the sign placed in the world

[worthy moat]

how?

[tender shard]

by placing the sign, and then call getBlockState

[worthy moat]

thx

[tender shard]

maybe sth like this

    public static void openSign(Player player) {
        Block block = player.getWorld().getBlockAt(player.getLocation());
        block.setType(Material.OAK_SIGN);
        Sign sign = (Sign) block.getState();
        player.openSign(sign, Side.FRONT);
        block.setType(Material.AIR); // Actually, save the original BlockData and set it back here
    }

[rose trail]

Is it possible to find out if the player is online on some server connected by a proxy server?

[worthy moat]

java.lang.IllegalStateException: Tile is null, asynchronous access? CraftBlock{pos=BlockPosition{x=-144, y=200, z=-291},type=OAK_SIGN,data=Block{minecraft:oak_sign}[rotation=0,waterlogged=false],fluid=net.minecraft.world.level.material.FluidTypeEmpty@5d0d9a4d}```

[worthy moat]

        Block block = player.getWorld().getBlockAt(new Location(player.getWorld(), player.getLocation().getX(),
                200, player.getLocation().getZ()));
        block.setType(Material.OAK_SIGN);
        signBlock = block;

        Sign sign = (Sign) player.getWorld().getBlockState(signBlock.getLocation());
        sign.getSide(Side.FRONT).setLine(1, "^^^^");
        sign.getSide(Side.FRONT).setLine(2, "Enter how many");
        sign.getSide(Side.FRONT).setLine(3, "players per team");
        player.sendBlockChange(player.getLocation(), block.getBlockData());
        player.openSign(sign, Side.FRONT);```

This is my code

[worthy moat]

Player Diamantenritter just tried to change non-editable sign

The SignGUI closes instantly

[eternal oxide]

are you doing anything after player.openSign ?

[worthy moat]

.nope

If the sign closes I retrieve a packet…And this packet gets retrieved after opening so I get kicked out

I think I spawn the wrong sign

There is an TitleEntitySign

Nvm

Hmm

I don’t know any further

[worthy moat]

this is still my code

[worthy moat]

How could I make a timer? I want that if enough Players are on the Lobb it should count down from 20 and then execute some stuff

Its for a Minigame

[river oracle]

don't really think you need a timer for this

[worthy moat]

How can I achieve this then?

[river oracle]

just listen to PlayerJoinEvent, PlayerLeaveEvent, though I suppose you'll need a timer for the countdown

[worthy moat]

yeah

[river oracle]

?scheduler

?schedule

fuck

I'l just pull it up

?jd-s

[undone axle]

https://hub.spigotmc.org/javadocs/spigot

[eternal oxide]

ing

[worthy moat]

runTaskDelayed

[chrome beacon]

?scheduling

[undone axle]

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

[river oracle]

why is it ing

[worthy moat]

But I want a countdown

[river oracle]

ye schedulers do that

[river oracle]

see Scheduling a Repeating Task in the link above

[worthy moat]

But I only want to execute it once after 20s for example

[river oracle]

yeah just cancel it after 20 seconds

I don't see the issue

run it every tick after 20 seconds worth of ticks cancel it

usually I wrap this into a nice easy to use class

[worthy moat]

You mean the repeating task as long as 20s and one delayed task running the code?

[eternal oxide]

You want a countdown so run it per second (20 ticks)

[pseudo hazel]

if you want to run something once you just use a delayed task

[worthy moat]

yeah but i want a countdown until this delayed task runs

[river oracle]

yeah but its a countdown

[remote swallow]

so have a repeating runnable that sends them the message while counting to whatever

[pseudo hazel]

okay

[remote swallow]

then when it reaches it run ur code and cancel the task

[pseudo hazel]

then do that

[river oracle]

i find it easiest to just wrap this logic into a class tbh

[pseudo hazel]

same I have a CountdownTimer class

[eternal oxide]

if you are going to use it in a few places, create a task which accepts countdown(int) and a runnable

your task does the countdown adn then executes the runnable

[worthy moat]

so a repeating task which cancels after reaching 20s?

[remote swallow]

yeah

[worthy moat]

How do I cancel such a task?

[remote swallow]

task.cancel

[pseudo hazel]

task.cancel

[remote swallow]

use the consumer method

[eternal oxide]

read the link

[pseudo hazel]

ur a consumer

[river oracle]

aren't we all consumers

[worthy moat]

ah yeah

just found it

Can I somehow store it somewherre else? Because if another player joins it would create another instance

xD

[eternal oxide]

you only start it when you hit the correct number of players

set a flag to show it's started

so you don;t start it again

[worthy moat]

ah ok so if the flag is for example RUNNING Countdown it wont start another instance

[umbral ridge]

https://tenor.com/view/wtf-wtf-cat-cat-wtf-cat-face-cat-fun-gif-17569572

[worthy moat]

if I set the initial delay to 0 it instantly starts?

[worthy moat]

How could I recognize if 20s is reached?

[trim creek]

Make a loop, and a few variables.
You need a variable for the countdown, and for the players.

In the loop, if the player's is minimum, then the loop should remove 1 from countdown each second, otherwise, just make the loop itself. If countdown is X, then do event you want.

[worthy moat]

I already have a task running every second

[trim creek]

Good, then do the countdown loop.

Where if player's minimum is met, remove one from countdown each second

and if countdown is X, do what you need

[worthy moat]

I cant place an var in there because its a lambda

            if (!MiniGame.getInstance().isInitializing()) {
                if (p.getServer().getOnlinePlayers().size() >= MiniGame.getInstance().getChosenArena().getTeams().size()) {
                    MiniGame.getInstance().setInitializing(true);
                    MessageManager.sendMessage(Bukkit.getServer(), "<green>The game is starting in 20 seconds");
                    Bukkit.getScheduler().runTaskTimer(AlphaWars.getAPI(), bukkitTask -> {

                        if (p.getServer().getOnlinePlayers().size() < MiniGame.getInstance().getChosenArena().getTeams().size()) {
                            bukkitTask.cancel();
                            MiniGame.getInstance().setInitializing(false);
                            MessageManager.sendMessage(Bukkit.getServer(), "<red>Countdown stopped! <bold>Not enough players!");
                            return;
                        }

                        MessageManager.sendMessage(Bukkit.getServer(), "<green>The game is starting in 20 seconds");

                    }, 1, 20);
                }
            }```

[mortal hare]

so im trying to setup spock on my java gradle project

and for some reason gradle doesnt detect testLogging as a valid property

even though it reloads successfully

what's the problem here?

[tender shard]

works fine for me

it also claims it can't find it but that's normal lol

[odd cobalt]

please help:
craftPlayer.getHandle().connection.send(packet)

java.lang.NoSuchFieldError: connection

[tender shard]

you didn't remap your .jar

?nms

[undone axle]

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

[river oracle]

you're not remapping

[odd cobalt]

im use gradle how to remap my jar

[remote swallow]

painfully

[river oracle]

you don't do that

unless you made a remap plugin yourself

or use paperweight

and if youre using paperweight you should probably ask paper

[tender shard]

there's no official gradle plugin for that

spigot uses maven

you can ofc just manually run the specialsource-plugin .jar

https://www.spigotmc.org/threads/spigot-bungeecord-1-17-1-17-1.510208/#post-4184317

java -cp $HOME/.m2/repository/net/md-5/SpecialSource/1.10.0/SpecialSource-1.10.0-shaded.jar:$HOME/.m2/repository/org/spigotmc/spigot/1.17-R0.1-SNAPSHOT/spigot-1.17-R0.1-SNAPSHOT-remapped-mojang.jar \
net.md_5.specialsource.SpecialSource --live -i $PLUGIN.jar -o $PLUGIN-obf.jar -m $HOME/.m2/repository/org/spigotmc/minecraft-server/1.17-R0.1-SNAPSHOT/minecraft-server-1.17-R0.1-SNAPSHOT-maps-mojang.txt --reverse

java -cp $HOME/.m2/repository/net/md-5/SpecialSource/1.10.0/SpecialSource-1.10.0-shaded.jar:$HOME/.m2/repository/org/spigotmc/spigot/1.17-R0.1-SNAPSHOT/spigot-1.17-R0.1-SNAPSHOT-remapped-obf.jar net.md_5.specialsource.SpecialSource \
--live -i $PLUGIN-obf.jar -o $PLUGIN.jar -m $HOME/.m2/repository/org/spigotmc/minecraft-server/1.17-R0.1-SNAPSHOT/minecraft-server-1.17-R0.1-SNAPSHOT-maps-spigot.csrg

ofc you gotta adjust the version and change $PLUGIN to your .jar file's path

could just write a gradle task that runs those 2 commands

[mortal hare]

fixed it

just add Test as a class name

it shows errors because it uses generics

to determine the type

[tender shard]

weird, it worked without that for me

[mortal hare]

it works without it

but this way is better since its more correct

basically it uses generics to provide methods

when you dont specify this, it would refer IDE to the generic type with a wildcard ? and it doesnt recognize all of those methods

im not an expert in groovy but i think that's what happens

[tender shard]

isn't 'test' the only task of type Test? i usually use withType

if I am forced to use gradle

[mortal hare]

this is the code from the wiki

so idk

[tacit drift]

https://learn.microsoft.com/en-us/minecraft/creator/documents/cameracommandintroduction

🤡🤡👹👹👹👹

[mortal hare]

👏 port 👏 this 👏 to 👏 java 👏 please 👏

imagine authme

without all of those shenanigans of reducing walkspeed and cancelling move events

[worldly ingot]

I prefer to imagine AuthMe not existing at all

[buoyant viper]

true

[tender shard]

i never understood the purpose of authme

[buoyant viper]

offline mode

[mortal hare]

to play on cracked

[worldly ingot]

buit yes, camera command and it being registerable on the server would be cool

[tender shard]

imagine playing on a cracked server lol

/register asd asd

so useful

[worldly ingot]

Could open up the possibility of top-down game modes

[sterile token]

haha i suppoused it was something related to that haha

[mortal hare]

yea imagine buying 20$ game in the third world country

you're saying that because you can afford it

some people cant unfortunately

I have premium account also

but i think authme has a reasonable place in the plugin marketplace

[worldly ingot]

Just weird to me that cracked players spend more money on cracked servers than it would cost for a Minecraft account

but I digress. Not the point here

[worldly ingot]

This is a cool command I'd like to see in Java

[mortal hare]

same

cutscenes

custom gui scenes

[worldly ingot]

Potentially, yeah. Like I said, top-down games as well

[sterile token]

Yes but authme isnt no well designed, they have password issues, which make them vulnerable to brute force attacks, isnt it?

[hazy parrot]

what

[sterile token]

I remember also a dev explained me you can dictionary attack it too

[tender shard]

but how did they buy a computer then

[sterile token]

Wait wait im really confused i thought you were talking about auhtme reload plugin

[tender shard]

we are talking about this weird /register asd asd and /login asd plugin

[sterile token]

oh right i wasnt wrong

I was told that authme reload has many vulnerability issues related to password, you can brute force them and also attack them by dictionary

[hazy parrot]

isn't bruteforce and dictionary attack same thing

[tender shard]

dictionary tries normal words, bruteforce can either mean "trying out a lot of stuff" or really just "starting at a and ending at zzzzzzzzzzzzz"

[hazy parrot]

never saw anyone do bruteforce without predefined list of "possible passwords"

starting at a and ending at zzzzzzzzzzzzz seems really long and inefficient lol

[wet breach]

authme doesn't stop packets

[tender shard]

Yeah but thats the classic „bruteforce“ lol

It does work offline for short passwords eg /etc/shadow

[worthy moat]

Ive got a JoinListener running and everytime someone joins he gets teleported to the Location I want....BUT! If someone new joins, the person spawns exactly where the worldSpawn is set...How can I override that without doing that manually with a command?

[tender shard]

how do you teleport them?

just by calling teleport in the event?

[worthy moat]

Yes

[umbral ridge]

Why does right click on PlayerInteractEvent fire twice again?

[undone axle]

The PlayerInteractEvent may be called once per hand. If you only want code to be executed once, you can check the result of https://hub.spigotmc.org/javadocs/spigot/org/bukkit/event/player/PlayerInteractEvent.html#getHand(), then decide functionality.

For example, only executing code if the main hand was used:

@EventHandler
public void onPlayerInteract(PlayerInteractEvent event) {
    if (event.getHand() != EquipmentSlot.HAND) { // * if the hand used is NOT the main hand:
        return; // do not progress past this point  |
    }
    // provide functionality
}

[umbral ridge]

Clicking with an axe

[umbral ridge]

Thanks

[white root]

How expensive is checking permissions via vault?
Do I need to worry about caching permissions and not checking them too often?

[tender shard]

don't worry about it

[rare rover]

Anyone got any good tutorials on Function, and Predicate? I'm wanting to expand my knowledge with it. I've seen them in many API's on github and noticed they could be quite useful for me

[hazy parrot]

What exactly are you struggling with

Function is just generic function where you can decide both argument and return type

And predicate is basically same, but it's defined that it must return boolean

As its used for filters

Just part of java functional interfaces, which are usually used to pass some kind of functions to method arguments

That is called higher order functions ^

[rare rover]

I'm just wondering how it would be beneficial for me

[rare rover]

Ahhh I see

[hazy parrot]

There are much more functional interfaces you can explore, probably most commonly used others are Runnable and Consumer

And it's common for all func interfaces that they only have one non-default method

[rare rover]

Ah, yeah ik how to use Runnable, Consumers, and Suppliers

[buoyant viper]

just wait until u hear about BiConsumers and BiFunctions

[hazy parrot]

Bibibibifunction

[buoyant viper]

but no BiSupplier 😔

[hazy parrot]

Well that would make no sense, as supplier have no args 😛

[buoyant viper]

dont need em

just raw Power and Will

[hazy parrot]

🫡

[buoyant viper]

like a month or 2 ago i was actually talking abt BiSupplier

not realizing just why they didnt exist

[rare rover]

Oh yeah I've seen the BiFunction<K, U, V> lol

Seems wonderful

[buoyant viper]

#general message lol

the BiSupplier would have to have just been a Supplier<Object[]> lol

[hazy parrot]

It's same as function, but have 2 argument instead of one

[young knoll]

Gotta get your supply of bi

[buoyant viper]

true

[rare rover]

So what's the upside to them? Like why should I use them?

If you've already answered that srry lol

[hazy parrot]

If you need to pass function somehow or somewhere

And depends on what that function have to do, you will chose corresponding functional interface

[rare rover]

Where the TriFunction at 🙄😭

Love to see it lol

[young knoll]

You can always make one

:p

[rare rover]

True thay

That*

[rare rover]

ohhh i see

public class Main {

    public static void main(String[] args) {
        int testing = testing(1, integer -> integer * 2);
        Predicate<Integer> check = check(testing);
        if (check.test(2)) {
            System.out.println("Test passed");
        } else {
            System.out.println("Test failed");
        }
    }

    public static int testing(int apply, Function<Integer, Integer> function) {
        return function.apply(apply);
    }

    public static Predicate<Integer> check(int test) {
        return integer -> integer == test;
    }
}``` kinda like this?

[worldly ingot]

Sure but you can forego the check() method and in-line your predicate

Predicate<Integer> check = (integer) -> integer == test; will work fine

Or, well, I suppose the better way to go about that would be to turn your method into a predicate target

Oh, nevermind. I see why you put it in a method lol

[rare rover]

i still don't fully get the reason why people use this?

Predicate atleast

i get why Function

[worldly ingot]

Take Collection#removeIf() for example which takes in a Predicate<T> (where T is the element in the collection)

That allows you to pass in some arbitrary condition which will remove any values that match the predicate

[young knoll]

Yeah lambda stuff is pretty cool

I find myself using consumer the most

[rare rover]

oh i see

so i could do

        int testing = testing(1, integer -> {
            if (integer == 1) {
                return 2;
            } else {
                return 3;
            }
        });``` bad example but

[worldly ingot]

It's when you want to pass on decision making to the caller rather than having to implement very specific methods and limiting your API

[rare rover]

so literally lambda lol

i see why people use this now

😆

[worldly ingot]

A lambda is just syntax sugar for implementing an interface with a single method

[rare rover]

ah

default boolean removeIf(Predicate<? super E> filter) {```

ahhh

i can see why this is useful

[young knoll]

Now you get to learn default methods :p

[rare rover]

this explains it somewhat

[rare rover]

ik default lol

its like public in a class

but in an interface

[worldly ingot]

Not necessarily

[rare rover]

basically

instead of using static boolean removeIf

[rare rover]

oh?

[worldly ingot]

default is just a default implementation. They introduced it in Java 8 so they could add methods like removeIf() and forEach() without breaking API that implemented the Collection interfaces

[rare rover]

ahh

[worldly ingot]

Before then interfaces didn't provide any implementation whatsoever. It was all up to implementing classes. Now they can provide default behaviour and implementations can override it if they'd like

[young knoll]

And now interfaces are just glorified abstract classes

||/s||

[worldly ingot]

[rare rover]

hmm

so

somewhat like this?

public class Main {

    public static void main(String[] args) {
        List<Integer> ints = List.of(1, 2, 3, 4, 5);
        check(ints, integer -> integer > 0);
    }

    public static void check(Iterable<Integer> iterable, Predicate<? super Integer> predicate) {
        iterable.forEach(integer -> {
            if (predicate.test(integer)) {
                System.out.println("Test passed");
            } else {
                System.out.println("Test failed");
            }
        });

    }
}```

i could do Integer

in the Predicate

but

instead of ? super integer

makes me feel special doing that

🤣

just for testing purposes i wont do this in my actual API

obviously

[worldly ingot]

Yeah that looks right. Though as a note, there is an IntPredicate which accepts a primitive int instead of a wrapped Integer which will avoid boxing

public class Main {

    public static void main(String[] args) {
        List<Integer> ints = List.of(1, 2, 3, 4, 5);
        check(ints, value -> value > 0);
    }

    public static void check(Iterable<Integer> iterable, IntPredicate predicate) {
        iterable.forEach(integer -> {
            if (predicate.test(integer)) {
                System.out.println("Test passed");
            } else {
                System.out.println("Test failed");
            }
        });

    }
}```

Same thing just a different type

A lot of the stdlib functional interfaces have primitive sister types

[blazing flare]

How would I serialize an ItemStack, but to json? I got that itemStack.serialize() returns a Map<String, Object> but I'm then trying to use GSON to serialize that. Initially, it appears to work, until I go to serialize what was deserialized and then it chokes due to java.util.Optional#value, wherever that came from I have no clue but it likely didn't deserialize correctly.

[worldly ingot]

Serializing to JSON isn't really something we expose in Bukkit because it's subject to changing and isn't very version-independent. Bukkit tries to retain version compatibility

The best way to serialize an ItemStack is probably via the BukkitObjectInput/OutputStreams, which isn't JSON, but it's a byte stream representation of the Map

[rare rover]

okay so i changed it to:

public class Main {

    public static void main(String[] args) {
        Testing<Integer> testing = new Testing<>();
        testing.check(List.of(1, 2, 3, 4, 5), integer -> integer > 0);
    }

    public static class Testing<K extends Integer> {

        public void check(Iterable<K> iterable, Predicate<K> predicate) {
            iterable.forEach(integer -> {
                if (predicate.test(integer)) {
                    System.out.println("Test passed");
                } else {
                    System.out.println("Test failed");
                }
            });

        }
    }
}``` at least im somewhat getting the hang of this

[rare rover]

oh i see

[worldly ingot]

Here you actually don't need the class. You can generify the method itself