--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/eclipse/jetty/util/log/AbstractLogger.java	Wed Sep 07 21:15:48 2016 -0600
@@ -0,0 +1,77 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.util.log;
+
+
+/* ------------------------------------------------------------ */
+/** Abstract Logger.
+ * Manages the atomic registration of the logger by name.
+ */
+public abstract class AbstractLogger implements Logger
+{
+    public final Logger getLogger(String name)
+    {
+        if (isBlank(name))
+            return this;
+
+        final String basename = getName();
+        final String fullname = (isBlank(basename) || Log.getRootLogger()==this)?name:(basename + "." + name);
+        
+        Logger logger = Log.getLoggers().get(fullname);
+        if (logger == null)
+        {
+            Logger newlog = newLogger(fullname);
+            
+            logger = Log.getMutableLoggers().putIfAbsent(fullname,newlog);
+            if (logger == null)
+                logger=newlog;
+        }
+
+        return logger;
+    }
+    
+
+    protected abstract Logger newLogger(String fullname);
+
+    /**
+     * A more robust form of name blank test. Will return true for null names, and names that have only whitespace
+     *
+     * @param name
+     *            the name to test
+     * @return true for null or blank name, false if any non-whitespace character is found.
+     */
+    private static boolean isBlank(String name)
+    {
+        if (name == null)
+        {
+            return true;
+        }
+        int size = name.length();
+        char c;
+        for (int i = 0; i < size; i++)
+        {
+            c = name.charAt(i);
+            if (!Character.isWhitespace(c))
+            {
+                return false;
+            }
+        }
+        return true;
+    }
+}