From e8d9951ee8873b1a9be769655e970bdfb509d586 Mon Sep 17 00:00:00 2001
From: KHobbits <rob@khobbits.co.uk>
Date: Wed, 17 Jul 2013 01:56:27 +0100
Subject: [PATCH] Add scaling object cap for usermap, prevent huge memory
 usage, also config file configurable.

---
 .../src/com/earth2me/essentials/ISettings.java     | 14 ++++++++------
 .../src/com/earth2me/essentials/Settings.java      |  7 +++++++
 .../src/com/earth2me/essentials/UserMap.java       |  3 ++-
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/Essentials/src/com/earth2me/essentials/ISettings.java b/Essentials/src/com/earth2me/essentials/ISettings.java
index b9d7c1ed0..bbf11fcb1 100644
--- a/Essentials/src/com/earth2me/essentials/ISettings.java
+++ b/Essentials/src/com/earth2me/essentials/ISettings.java
@@ -146,7 +146,7 @@ public interface ISettings extends IConf
 
 	boolean areDeathMessagesEnabled();
 
-	public void setDebug(boolean debug);
+	void setDebug(boolean debug);
 
 	Set<String> getNoGodWorlds();
 
@@ -184,15 +184,17 @@ public interface ISettings extends IConf
 
 	double getMaxWalkSpeed();
 
-	public int getMailsPerMinute();
+	int getMailsPerMinute();
 
-	public long getEconomyLagWarning();
+	long getEconomyLagWarning();
 
-	public void setEssentialsChatActive(boolean b);
+	void setEssentialsChatActive(boolean b);
 
 	long getMaxTempban();
 
-	public Map<String, Object> getListGroupConfig();
+	Map<String, Object> getListGroupConfig();
 
-	public int getMaxNickLength();
+	int getMaxNickLength();
+	
+	int getMaxUserCacheCount();
 }
diff --git a/Essentials/src/com/earth2me/essentials/Settings.java b/Essentials/src/com/earth2me/essentials/Settings.java
index e3916ddde..a10477e43 100644
--- a/Essentials/src/com/earth2me/essentials/Settings.java
+++ b/Essentials/src/com/earth2me/essentials/Settings.java
@@ -1105,4 +1105,11 @@ public class Settings implements net.ess3.api.ISettings
 	{
 		return config.getInt("max-nick-length", 30);
 	}
+	
+	
+	public int getMaxUserCacheCount()
+	{
+		long count = Runtime.getRuntime().maxMemory() / 1024 / 96;
+		return config.getInt("max-user-cache-count", (int)count);
+	}
 }
diff --git a/Essentials/src/com/earth2me/essentials/UserMap.java b/Essentials/src/com/earth2me/essentials/UserMap.java
index c2912f377..6ee46b907 100644
--- a/Essentials/src/com/earth2me/essentials/UserMap.java
+++ b/Essentials/src/com/earth2me/essentials/UserMap.java
@@ -17,13 +17,14 @@ import org.bukkit.entity.Player;
 public class UserMap extends CacheLoader<String, User> implements IConf
 {
 	private final transient IEssentials ess;
-	private final transient Cache<String, User> users = CacheBuilder.newBuilder().softValues().build(this);
+	private final transient Cache<String, User> users;
 	private final transient ConcurrentSkipListSet<String> keys = new ConcurrentSkipListSet<String>();
 
 	public UserMap(final IEssentials ess)
 	{
 		super();
 		this.ess = ess;
+		users = CacheBuilder.newBuilder().maximumSize(ess.getSettings().getMaxUserCacheCount()).softValues().build(this);		
 		loadAllUsersAsync(ess);
 	}