Make Recorder facility usable independent of special crawler threads

* Recorder.java
    store reusable per-thread Recorder instance in Recorder static thread-local
* ToeThread.java
    setup reusable instance into Recorder
* RecorderMarker.java
    deleted -- unnecessary

commons/src/main/java/org/archive/util/Recorder.java

@@ -251,6 +251,13 @@ public class Recorder {
         }
     }
 
+    
+    static ThreadLocal<Recorder> currentRecorder = new ThreadLocal<Recorder>();
+    
+    public static void setHttpRecorder(Recorder httpRecorder) {
+        currentRecorder.set(httpRecorder);
+    } 
+    
     /**
      * Get the current threads' HttpRecorder.
      *
@@ -258,12 +265,7 @@ public class Recorder {
      * HttpRecorder in current instance.
      */
     public static Recorder getHttpRecorder() {
-        Recorder recorder = null;
-        Thread thread = Thread.currentThread();
-        if (thread instanceof RecorderMarker) {
-            recorder = ((RecorderMarker)thread).getHttpRecorder();
-        }
-        return recorder;
+        return currentRecorder.get(); 
     }
 
     /**

commons/src/main/java/org/archive/util/RecorderMarker.java

@@ -1,34 +0,0 @@
-/*
- *  This file is part of the Heritrix web crawler (crawler.archive.org).
- *
- *  Licensed to the Internet Archive (IA) by one or more individual 
- *  contributors. 
- *
- *  The IA licenses this file to You under the Apache License, Version 2.0
- *  (the "License"); you may not use this file except in compliance with
- *  the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.archive.util;
-
-
-/**
- * A marker interface to denote a class with a gettable HttpRecorder.
- *
- * @author stack
- * @version $Id$
- */
-public interface RecorderMarker
-{
-	/**
-     * @return An instance of HttpRecorder.
-	 */
-    public Recorder getHttpRecorder();
-}