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Calculation of /balancetop is now async to prevent slowdown of the server

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This commit is contained in:
snowleo 2011-11-28 18:53:38 +01:00
parent 7268e1965d
commit eea7785b7f
2 changed files with 138 additions and 36 deletions
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20
Essentials/src/com/earth2me/essentials/UserMap.java
View File

@ -5,12 +5,10 @@ import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.collect.ConcurrentHashMultiset;
import java.io.File;
import java.util.HashSet;
import java.util.Collections;
import java.util.Locale;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.logging.Level;
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
@ -104,21 +102,9 @@ public class UserMap extends CacheLoader<String, User> implements IConf
users.invalidate(name.toLowerCase(Locale.ENGLISH));
}
public Set<User> getAllUsers()
public Set<String> getAllUniqueUsers()
{
final Set<User> userSet = new HashSet<User>();
for (String name : keys)
{
try
{
userSet.add(users.get(name));
}
catch (ExecutionException ex)
{
Bukkit.getLogger().log(Level.INFO, "Failed to load user " + name, ex);
}
}
return userSet;
return Collections.unmodifiableSet(keys.elementSet());
}
public int getUniqueUsers()

154
Essentials/src/com/earth2me/essentials/commands/Commandbalancetop.java
View File

@ -1,10 +1,10 @@
package com.earth2me.essentials.commands;
import static com.earth2me.essentials.I18n._;
import com.earth2me.essentials.User;
import com.earth2me.essentials.Util;
import java.util.*;
import java.util.Map.Entry;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.bukkit.Server;
import org.bukkit.command.CommandSender;
@ -15,6 +15,12 @@ public class Commandbalancetop extends EssentialsCommand
{
super("balancetop");
}
private static final int CACHETIME = 5 * 60 * 1000;
public static final int MINUSERS = 50;
private static List<String> cache = new ArrayList<String>();
private static long cacheage = 0;
private static ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
@Override
protected void run(final Server server, final CommandSender sender, final String commandLabel, final String[] args) throws Exception
@ -24,7 +30,7 @@ public class Commandbalancetop extends EssentialsCommand
{
try
{
if (Integer.parseInt(args[0]) < 10)
if (Integer.parseInt(args[0]) < 19)
{
max = Integer.parseInt(args[0]);
}
@ -34,31 +40,141 @@ public class Commandbalancetop extends EssentialsCommand
//catch it because they tried to enter a string not number.
}
}
final Map<User, Double> balances = new HashMap<User, Double>();
for (User u : ess.getUserMap().getAllUsers())
if (lock.readLock().tryLock())
{
balances.put(u, u.getMoney());
try
{
if (cacheage > System.currentTimeMillis() - CACHETIME)
{
outputCache(sender, max);
return;
}
if (ess.getUserMap().getUniqueUsers() > MINUSERS)
{
sender.sendMessage("Calculating results");
}
}
finally
{
lock.readLock().unlock();
}
ess.scheduleAsyncDelayedTask(new Viewer(sender, max));
}
else
{
if (ess.getUserMap().getUniqueUsers() > MINUSERS)
{
sender.sendMessage("Calculating results");
}
ess.scheduleAsyncDelayedTask(new Viewer(sender, max));
}
final List<Map.Entry<User, Double>> sortedEntries = new ArrayList<Map.Entry<User, Double>>(balances.entrySet());
Collections.sort(sortedEntries, new Comparator<Map.Entry<User, Double>>()
{
@Override
public int compare(final Entry<User, Double> entry1, final Entry<User, Double> entry2)
{
return -entry1.getValue().compareTo(entry2.getValue());
}
});
int count = 0;
}
private static void outputCache(final CommandSender sender, int max)
{
sender.sendMessage(_("balanceTop", max));
for (Map.Entry<User, Double> entry : sortedEntries)
for (String line : cache)
{
if (count == max)
if (max == 0)
{
break;
}
sender.sendMessage(entry.getKey().getDisplayName() + ", " + Util.formatCurrency(entry.getValue(), ess));
count++;
max--;
sender.sendMessage(line);
}
}
private class Calculator implements Runnable
{
private final transient Viewer viewer;
public Calculator(final Viewer viewer)
{
this.viewer = viewer;
}
@Override
public void run()
{
lock.writeLock().lock();
try
{
if (cacheage < System.currentTimeMillis() - 5 * 60 * 1000)
{
final Map<String, Double> balances = new HashMap<String, Double>();
for (String u : ess.getUserMap().getAllUniqueUsers())
{
try
{
balances.put(u, ess.getUserMap().getUser(u).getMoney());
}
catch (NullPointerException ex)
{
}
}
final List<Map.Entry<String, Double>> sortedEntries = new ArrayList<Map.Entry<String, Double>>(balances.entrySet());
Collections.sort(sortedEntries, new Comparator<Map.Entry<String, Double>>()
{
@Override
public int compare(final Entry<String, Double> entry1, final Entry<String, Double> entry2)
{
return -entry1.getValue().compareTo(entry2.getValue());
}
});
int count = 0;
for (Map.Entry<String, Double> entry : sortedEntries)
{
if (count == 20)
{
break;
}
cache.add(entry.getKey() + ", " + Util.formatCurrency(entry.getValue(), ess));
count++;
}
cacheage = System.currentTimeMillis();
}
}
finally
{
lock.writeLock().unlock();
}
ess.scheduleAsyncDelayedTask(viewer);
}
}
private class Viewer implements Runnable
{
private final transient CommandSender sender;
private final transient int max;
public Viewer(final CommandSender sender, final int max)
{
this.sender = sender;
this.max = max;
}
@Override
public void run()
{
lock.readLock().lock();
try
{
if (cacheage > System.currentTimeMillis() - 5 * 60 * 1000)
{
outputCache(sender, max);
return;
}
}
finally
{
lock.readLock().unlock();
}
ess.scheduleAsyncDelayedTask(new Calculator(new Viewer(sender, max)));
}
}
}