RequestContextListener


1   // Copyright (c) 2003-2007, Jodd Team (jodd.sf.net). All Rights Reserved.
2   
3   package jodd.servlet;
4   
5   import javax.servlet.ServletRequestListener  ;
6   import javax.servlet.ServletRequestEvent  ;
7   import javax.servlet.http.HttpServletRequest  ;
8   
9   /**
10   * Store request in current and all child threads, so it can be easily accessible.
11   */
12  public class RequestContextListener implements ServletRequestListener   {
13  
14      private static final ThreadLocal   requestHolder = new InheritableThreadLocal  ();
15  
16      public void requestInitialized(ServletRequestEvent   requestEvent) {
17          if ((requestEvent.getServletRequest() instanceof HttpServletRequest  ) == false) {
18              throw new IllegalArgumentException  ("Request is not an HttpServletRequest: " + requestEvent.getServletRequest());
19          }
20          HttpServletRequest   request = (HttpServletRequest  ) requestEvent.getServletRequest();
21          requestHolder.set(request);
22      }
23  
24      public void requestDestroyed(ServletRequestEvent   servletRequestEvent) {
25          requestHolder.set(null);
26      }
27  
28      /**
29       * Returns current http servlet request.
30       */
31      public static HttpServletRequest   getRequest() {
32          return (HttpServletRequest  ) requestHolder.get();
33      }
34  }

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