Add spawn location cache to reduce blocking on player respawn.

EssentialsSpawn/src/com/earth2me/essentials/spawn/SpawnStorage.java

@@ -8,18 +8,29 @@ import java.io.File;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 import org.bukkit.Location;
 import org.bukkit.World;
 
 
 public class SpawnStorage extends AsyncStorageObjectHolder<Spawns> implements IEssentialsModule
 {
+	private ConcurrentMap<String, Location> spawns;
+
 	public SpawnStorage(final IEssentials ess)
 	{
 		super(ess, Spawns.class);
 		reloadConfig();
 	}
 
+	@Override
+	public final void reloadConfig()
+	{
+		super.reloadConfig();
+		spawns = new ConcurrentHashMap<String, Location>();
+	}
+
 	@Override
 	public File getStorageFile()
 	{
@@ -52,6 +63,8 @@ public class SpawnStorage extends AsyncStorageObjectHolder<Spawns> implements IE
 			unlock();
 		}
 
+		spawns.clear();
+
 		if ("default".equalsIgnoreCase(group))
 		{
 			loc.getWorld().setSpawnLocation(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ());
@@ -59,6 +72,13 @@ public class SpawnStorage extends AsyncStorageObjectHolder<Spawns> implements IE
 	}
 
 	public Location getSpawn(final String group)
+	{
+		Location spawnLocation;
+		if (spawns.containsKey(group))
+		{
+			spawnLocation = spawns.get(group);
+		}
+		else
 		{
 			acquireReadLock();
 			try
@@ -75,14 +95,21 @@ public class SpawnStorage extends AsyncStorageObjectHolder<Spawns> implements IE
 				}
 				if (!spawnMap.containsKey(groupName))
 				{
-				return getWorldSpawn();
+					spawnLocation = getWorldSpawn();
+				}
+				else
+				{
+					spawnLocation = spawnMap.get(groupName);
 				}
-			return spawnMap.get(groupName);
 			}
 			finally
 			{
 				unlock();
 			}
+
+			spawns.put(group, spawnLocation);
+		}
+		return spawnLocation;
 	}
 
 	private Location getWorldSpawn()