From 78f4820876f42f7b50bf88f64afd45bee939e4e4 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@bigpond.com>
Date: Mon, 12 Mar 2012 10:39:36 +1100
Subject: Initial formatted and slightly tweaked version of @evenprime 's
 NoCheat. Will be intergrated into the main Essentials as soon as possible

---
 .../essentials/anticheat/debug/LagMeasureTask.java | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 EssentialsAntiCheat/src/com/earth2me/essentials/anticheat/debug/LagMeasureTask.java

(limited to 'EssentialsAntiCheat/src/com/earth2me/essentials/anticheat/debug/LagMeasureTask.java')

diff --git a/EssentialsAntiCheat/src/com/earth2me/essentials/anticheat/debug/LagMeasureTask.java b/EssentialsAntiCheat/src/com/earth2me/essentials/anticheat/debug/LagMeasureTask.java
new file mode 100644
index 000000000..4acb5a5f2
--- /dev/null
+++ b/EssentialsAntiCheat/src/com/earth2me/essentials/anticheat/debug/LagMeasureTask.java
@@ -0,0 +1,99 @@
+package com.earth2me.essentials.anticheat.debug;
+
+import com.earth2me.essentials.anticheat.NoCheat;
+import org.bukkit.World;
+
+
+/**
+ * A task running in the background that measures tick time vs. real time
+ *
+ */
+public class LagMeasureTask implements Runnable
+{
+	private int ingameseconds = 1;
+	private long lastIngamesecondTime = System.currentTimeMillis();
+	private long lastIngamesecondDuration = 2000L;
+	private boolean skipCheck = false;
+	private int lagMeasureTaskId = -1;
+	private final NoCheat plugin;
+
+	public LagMeasureTask(NoCheat plugin)
+	{
+		this.plugin = plugin;
+	}
+
+	public void start()
+	{
+		// start measuring with a delay of 10 seconds
+		lagMeasureTaskId = plugin.getServer().getScheduler().scheduleSyncRepeatingTask(plugin, this, 20, 20);
+	}
+
+	public void run()
+	{
+		try
+		{
+			boolean oldStatus = skipCheck;
+			// If the previous second took to long, skip checks during
+			// this second
+			skipCheck = lastIngamesecondDuration > 2000;
+
+			if (plugin.getConfig((World)null).logging.debugmessages)
+			{
+				if (oldStatus != skipCheck && skipCheck)
+				{
+					plugin.getLogger().warning("detected server lag, some checks will not work.");
+				}
+				else if (oldStatus != skipCheck && !skipCheck)
+				{
+					plugin.getLogger().info("server lag seems to have stopped, reenabling checks.");
+				}
+			}
+
+			long time = System.currentTimeMillis();
+			lastIngamesecondDuration = time - lastIngamesecondTime;
+			if (lastIngamesecondDuration < 1000)
+			{
+				lastIngamesecondDuration = 1000;
+			}
+			else if (lastIngamesecondDuration > 3600000)
+			{
+				lastIngamesecondDuration = 3600000; // top limit of 1
+				// hour per "second"
+			}
+			lastIngamesecondTime = time;
+			ingameseconds++;
+
+			// Check if some data is outdated now and let it be removed
+			if (ingameseconds % 62 == 0)
+			{
+				plugin.cleanDataMap();
+			}
+		}
+		catch (Exception e)
+		{
+			// Just prevent this thread from dying for whatever reason
+		}
+
+	}
+
+	public void cancel()
+	{
+		if (lagMeasureTaskId != -1)
+		{
+			try
+			{
+				plugin.getServer().getScheduler().cancelTask(lagMeasureTaskId);
+			}
+			catch (Exception e)
+			{
+				plugin.getLogger().warning("Couldn't cancel LagMeasureTask: " + e.getMessage());
+			}
+			lagMeasureTaskId = -1;
+		}
+	}
+
+	public boolean skipCheck()
+	{
+		return skipCheck;
+	}
+}
-- 
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