1 files changed, 121 insertions, 0 deletions
diff --git a/Essentials/src/com/earth2me/essentials/EssentialsErrorHandler.java b/Essentials/src/com/earth2me/essentials/EssentialsErrorHandler.java
new file mode 100644
index 000000000..60512737b
--- /dev/null
+++ b/Essentials/src/com/earth2me/essentials/EssentialsErrorHandler.java
@@ -0,0 +1,121 @@
+package com.earth2me.essentials;
+
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.logging.Handler;
+import java.util.logging.Level;
+import java.util.logging.LogRecord;
+
+
+class EssentialsErrorHandler extends Handler
+{
+	HashMap<BigInteger, String> errors = new HashMap<BigInteger, String>();
+	private final LinkedList<LogRecord> records = new LinkedList<LogRecord>();
+
+	public EssentialsErrorHandler()
+	{
+	}
+
+	@Override
+	public void publish(LogRecord lr)
+	{
+		if (lr.getThrown() == null || lr.getLevel().intValue() < Level.WARNING.intValue())
+		{
+			return;
+		}
+		synchronized (records)
+		{
+			records.add(lr);
+		}
+	}
+
+	@Override
+	public void flush()
+	{
+		synchronized (records)
+		{
+			sortRecords();
+		}
+	}
+
+	@Override
+	public void close() throws SecurityException
+	{
+		synchronized (records)
+		{
+			sortRecords();
+		}
+	}
+
+	private void sortRecords()
+	{
+		for (LogRecord lr : records)
+		{
+			try
+			{
+				if (lr.getThrown() == null)
+				{
+					return;
+				}
+				Throwable tr = lr.getThrown();
+				StackTraceElement[] elements = tr.getStackTrace();
+				if (elements == null || elements.length <= 0)
+				{
+					return;
+				}
+				boolean essentialsFound = false;
+				for (StackTraceElement stackTraceElement : elements)
+				{
+					if (stackTraceElement.getClassName().contains("com.earth2me.essentials"))
+					{
+						essentialsFound = true;
+						break;
+					}
+				}
+				if (essentialsFound == false && tr.getCause() != null)
+				{
+					Throwable cause = tr.getCause();
+					StackTraceElement[] elements2 = cause.getStackTrace();
+					if (elements2 != null)
+					{
+						for (StackTraceElement stackTraceElement : elements2)
+						{
+							if (stackTraceElement.getClassName().contains("com.earth2me.essentials"))
+							{
+								essentialsFound = true;
+								break;
+							}
+						}
+					}
+				}
+				StringBuilder sb = new StringBuilder();
+				sb.append("[").append(lr.getLevel().getName()).append("] ").append(lr.getMessage()).append("\n");
+				sb.append(tr.getMessage()).append("\n");
+				for (StackTraceElement stackTraceElement : tr.getStackTrace())
+				{
+					sb.append(stackTraceElement.toString()).append("\n");
+				}
+				if (tr.getCause() != null && tr.getCause().getStackTrace() != null)
+				{
+					sb.append(tr.getCause().getMessage()).append("\n");
+					for (StackTraceElement stackTraceElement : tr.getCause().getStackTrace())
+					{
+						sb.append(stackTraceElement.toString()).append("\n");
+					}
+				}
+				String errorReport = sb.toString();
+				byte[] bytesOfMessage = errorReport.getBytes("UTF-8");
+				MessageDigest md = MessageDigest.getInstance("MD5");
+				BigInteger bi = new BigInteger(md.digest(bytesOfMessage));
+				errors.put(bi, errorReport);
+			}
+			catch (Throwable t)
+			{
+				//Ignore all exceptions inside the exception handler
+			}
+		}
+		records.clear();
+	}
+}