Death event and freezing a player

ok so I want to freeze a player with out using Player move event. Also I want to stop the death event on the killing blow only by a player. also I get an error when a player is struck by an entity not a player.

Code:

package andrew.Knockout;
 
import java.util.HashSet;
import java.util.logging.Logger;
 
import org.bukkit.ChatColor;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.block.BlockIgniteEvent;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.entity.EntityDamageEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.event.player.PlayerTeleportEvent;
 
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;
 
public class Knockout extends JavaPlugin implements Listener {
    public static Knockout plugin;
 
    public final Logger logger = Logger.getLogger("Minecraft");
    public final BukkitLogger blo = new BukkitLogger(this);
 
    private HashSet<String> knockout = new HashSet<String>();
 
   
    @Override
    public void onEnable(){
        blo.enabled(true);
        PluginManager pm = this.getServer().getPluginManager();
        pm.registerEvents(this, this);
    }   
 
    @Override
    public void onDisable() {
        blo.enabled(false);
    }
 
    @EventHandler
    public void onEntityDamageByEntity(EntityDamageByEntityEvent event) {
        Entity e = event.getEntity();
        Entity damager = event.getDamager();
       
        if (e instanceof Player && damager instanceof Player) {
            Player player = (Player) e;
            int health = player.getHealth();
           
            if (health <= 7 ) {
                knockout.add(player.getName());
                event.setCancelled(true);
                               
                if(knockout.contains(player.getName())) {
                    event.setCancelled(true);
                    player.addPotionEffect(new PotionEffect(PotionEffectType.BLINDNESS, 400, 4));
                    player.sendMessage(ChatColor.DARK_RED + "You were hit over the head and knocked out!");
                    player.setHealth(20);
                    startTimer(player);
                }
 
            }
        }
    }
   
    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent event) {
        Player player = event.getPlayer();
       
        if(knockout.contains(player.getName())) {
            event.setCancelled(true);
        }
    }
 
    @EventHandler
    public void onBlockBreak(BlockBreakEvent event) {
        Player player = event.getPlayer();
        if(knockout.contains(player.getName())) {
            event.setCancelled(true);
        }
    }
 
    @EventHandler
    public void onBlockIgnite(BlockIgniteEvent event)
    {
        Player player = event.getPlayer();
        if(knockout.contains(player.getName())) {
            event.setCancelled(true);
        }
    }
 
    @EventHandler   
    public void onBlockPlace(BlockPlaceEvent event)
    {
        Player player = event.getPlayer();
        if(knockout.contains(player.getName())) {
            event.setCancelled(true);
        }
    }
 
    @EventHandler
    public void onPlayerTeleport(PlayerTeleportEvent event)
    {
        Player player = event.getPlayer();
        if(knockout.contains(player.getName())) {
            event.setCancelled(true);
        }
    }
 
    @EventHandler
    public void onEntityDamageEvent(EntityDamageEvent event) {
        Entity e = event.getEntity();
        Player player = (Player) e;
       
        if(knockout.contains(player.getName())) {
            event.setCancelled(true);
        }
    }
 
    @EventHandler
    public void onPlayerMove(PlayerMoveEvent event) {
        Player player = event.getPlayer();
       
        if (knockout.contains(player.getName())){
              event.setCancelled(true);
 
        }
    }
   
    public void startTimer(Player player) {
        final String name = player.getName();
        final Player player1 = (Player) player;
 
               
            getServer().getScheduler().scheduleAsyncDelayedTask(this, new Runnable() {
                public void run() {
                    if (knockout.contains(name)) {
                        knockout.remove(name);
                       
                        player1.sendMessage(ChatColor.DARK_RED + "You awake feeling dizzy and confused!");   
                    }
                }
            }, 400);
    }
}

that was the source

here is the error

Code:

18:38:41 [SEVERE] Could not pass event EntityDamageEvent to Knockout v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:341)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:462)
        at net.minecraft.server.EntityLiving.z(EntityLiving.java:301)
        at net.minecraft.server.Entity.h_(Entity.java:216)
        at net.minecraft.server.EntityLiving.h_(EntityLiving.java:435)
        at net.minecraft.server.EntitySlime.h_(EntitySlime.java:72)
        at net.minecraft.server.World.entityJoinedWorld(World.java:1245)
        at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:5
11)
        at net.minecraft.server.World.playerJoinedWorld(World.java:1227)
        at net.minecraft.server.World.tickEntities(World.java:1125)
        at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:428)
        at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:547)
        at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
        at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.entity.CraftSlim
e cannot be cast to org.bukkit.entity.Player
        at andrew.Knockout.Knockout.onEntityDamageEvent(Knockout.java:118)
        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:339)
        ... 17 more
18:39:11 [INFO] Read timed out

 

Code:

if (e instanceof Player && damager instanceof Player) 

To

Code:

if ((e instanceof Player) && (damager instanceof Player)) 

Nvm mind about that: on your entity damage event, check if its a player

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I thought thats what I was doing? how do i freeze a player with out PlayerMoveEvent

 

On your EntityDamageEvent

 

Yea I need them to freeze but PlayerMoveEvent cant be used.

 

You need to use playermoveevent.

 

Wrong!

Create a repeating task that checks their location every couple ticks and teleports them back?

 

That's an absolutely terrible idea.

 

PlayerMoveEvent is way to often it becomes unreliable with hundreds of players using the plugin 24/7.

 

You got any other ideas without using the move event, then?

 

Then a repeating synchronous task is the way to go. Look up scheduler programming on the bukkit wiki, but be warned it may produce odd results with freezing players as ticks per second varies. I honestly think that you may be better off with using the move event and just keeping your code as efficient as possible. If you give us more details about what you want to accomplish we may be able to give you more specific advice.

 

Why would you not use the move event? There's literally NO need for an extra thread here.

 

Argue with the OP, not the helpful person. OP says:

 

Ok well when a player get struck by another player I want them to be frozen for 20 seconds. also can someone help with the error

 

Use the move event, it's more reliable than a thread that's going to be iterating through your so called "hundreds of players" every few ticks.

if(hashset.contains(e.getPlayer().getName())) e.getPlayer().teleport(e.getFrom());

 

ok im gonna stick with player move event. now what about the error

 

fourthbrook
I told you what to change!
EnitityDamageEvent
not EntityDamageByEntityEvent!

 

ah sorry will do thanks. also my cancel event for damage by player only works if the most damage possible is 7 but lets say my server has a plugin that can theoretically do 500 damage. how would that work? cause the player would die. how can I make it so that it doesn't mater how much damage is done but if it is possible the blow could kill them it cancels it. any suggestions

*edit* also I changed to EntityDamageEvent but Eclipse throws an error.

 

I do not think this is possible. However, I put a link here earlier about what you CAN do
What is the error?

 

The EntityDamageByEntity event was right, because EntityDamage doesn't have a .getDamager() that returns an entity which you're using.

 

right but the server throws an error when none player entities hit a player.

what link?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Sorry, I gave it to you on your last thread
So here is the link:
http://forums.bukkit.org/threads/canceling-death-event-alternative.86531/#post-1215405

 

I might have to do that.

any advice on the server error at the top of the post.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

It is simply a non player entity cannot be cast to a player.
It's in EntityDamageEvent

 

yes but Entity damage event doesn't have getDamager.

 

All I did was tell you exactly what your error said

 

oh ok sorry. do you know how to fix it?

 

You did this:

Code:java

Entity e = event.getEntity();
Player player = (Player) event.getEntity();

Check for instanceof player, or something along those lines

 

do you think there is anyway to add location to the code on this page? http://forums.bukkit.org/threads/canceling-death-event-alternative.86531/#post-1215405

 

Please be more specific