コード例 #1
0
  /**
   * Return an <code>Action</code> instance that will be used to process the current request,
   * creating a new one if necessary.
   *
   * @param request The servlet request we are processing
   * @param response The servlet response we are creating
   * @param mapping The mapping we are using
   * @return An <code>Action</code> instance that will be used to process the current request.
   * @throws IOException if an input/output error occurs
   */
  protected Action processActionCreate(
      HttpServletRequest request, HttpServletResponse response, ActionMapping mapping)
      throws IOException {
    // Acquire the Action instance we will be using (if there is one)
    String className = mapping.getType();

    if (log.isDebugEnabled()) {
      log.debug(" Looking for Action instance for class " + className);
    }

    // If there were a mapping property indicating whether
    // an Action were a singleton or not ([true]),
    // could we just instantiate and return a new instance here?
    Action instance;

    synchronized (actions) {
      // Return any existing Action instance of this class
      instance = (Action) actions.get(className);

      if (instance != null) {
        if (log.isTraceEnabled()) {
          log.trace("  Returning existing Action instance");
        }

        return (instance);
      }

      // Create and return a new Action instance
      if (log.isTraceEnabled()) {
        log.trace("  Creating new Action instance");
      }

      try {
        instance = (Action) RequestUtils.applicationInstance(className);

        // Maybe we should propagate this exception
        // instead of returning null.
      } catch (Exception e) {
        log.error(getInternal().getMessage("actionCreate", mapping.getPath()), e);

        response.sendError(
            HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
            getInternal().getMessage("actionCreate", mapping.getPath()));

        return (null);
      }

      actions.put(className, instance);
    }

    if (instance.getServlet() == null) {
      instance.setServlet(this.servlet);
    }

    return (instance);
  }
コード例 #2
0
  /** Clean up in preparation for a shutdown of this application. */
  public void destroy() {
    synchronized (this.actions) {
      Iterator actions = this.actions.values().iterator();

      while (actions.hasNext()) {
        Action action = (Action) actions.next();

        action.setServlet(null);
      }

      this.actions.clear();
    }

    this.servlet = null;
  }