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    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
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   * without modification, are permitted provided that the following
   * conditions are met:
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   *   notice, this list of conditions and the following disclaimer.
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  package org.eclipse.jgit.junit.http;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.Semaphore;
  
  import javax.servlet.DispatcherType;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.eclipse.jetty.server.Request;
  import org.eclipse.jetty.server.Response;
  import org.eclipse.jetty.server.handler.HandlerWrapper;
  
  /** Logs request made through {@link AppServer}. */
  class TestRequestLog extends HandlerWrapper {
    private static final int MAX = 16;
  
    private final List<AccessEvent> events = new ArrayList<>();
  
    private final Semaphore active = new Semaphore(MAX);
  
    /** Reset the log back to its original empty state. */
    void clear() {
      try {
        for (;;) {
          try {
            active.acquire(MAX);
            break;
          } catch (InterruptedException e) {
            continue;
          }
        }
  
        synchronized (events) {
          events.clear();
        }
      } finally {
        active.release(MAX);
      }
    }
  
    /** @return all of the events made since the last clear. */
    List<AccessEvent> getEvents() {
      try {
        for (;;) {
          try {
            active.acquire(MAX);
            break;
          } catch (InterruptedException e) {
            continue;
          }
        }
  
       synchronized (events) {
         return events;
       }
     } finally {
       active.release(MAX);
     }
   }
 
   @Override
   public void handle(String target, Request baseRequest, HttpServletRequest request,
       HttpServletResponse response) throws IOException, ServletException {
     try {
       for (;;) {
         try {
           active.acquire();
           break;
         } catch (InterruptedException e) {
           continue;
         }
       }
 
       super.handle(target, baseRequest, request, response);
 
       if (DispatcherType.REQUEST.equals(baseRequest.getDispatcherType()))
         log((Request) request, (Response) response);
 
     } finally {
       active.release();
     }
   }
 
   private void log(Request request, Response response) {
     synchronized (events) {
       events.add(new AccessEvent(request, response));
     }
   }
 }