Class AbstractHandlerExceptionResolver

Field Detail

• logger

  protected final Log logger

  Logger available to subclasses

Constructor Detail

• AbstractHandlerExceptionResolver

  public AbstractHandlerExceptionResolver()

Method Detail

• setOrder

  public void setOrder​(int order)

• getOrder

  public int getOrder()

  Description copied from interface: Ordered
  Get the order value of this object.

  Higher values are interpreted as lower priority. As a consequence, the object with the lowest value has the highest priority (somewhat analogous to Servlet load-on-startup values).

  Same order values will result in arbitrary sort positions for the affected objects.

  Specified by:

  getOrder in interface Ordered

  Returns:

  the order value

  See Also:

  Ordered.HIGHEST_PRECEDENCE, Ordered.LOWEST_PRECEDENCE

• setMappedHandlers

  public void setMappedHandlers​(Set<?> mappedHandlers)

  Specify the set of handlers that this exception resolver should apply to.

  The exception mappings and the default error view will only apply to the specified handlers.

  If no handlers or handler classes are set, the exception mappings and the default error view will apply to all handlers. This means that a specified default error view will be used as a fallback for all exceptions; any further HandlerExceptionResolvers in the chain will be ignored in this case.

• setMappedHandlerClasses

  public void setMappedHandlerClasses​(Class<?>... mappedHandlerClasses)

  Specify the set of classes that this exception resolver should apply to.

  The exception mappings and the default error view will only apply to handlers of the specified types; the specified types may be interfaces or superclasses of handlers as well.

  If no handlers or handler classes are set, the exception mappings and the default error view will apply to all handlers. This means that a specified default error view will be used as a fallback for all exceptions; any further HandlerExceptionResolvers in the chain will be ignored in this case.

• setWarnLogCategory

  public void setWarnLogCategory​(String loggerName)

  Set the log category for warn logging. The name will be passed to the underlying logger implementation through Commons Logging, getting interpreted as a log category according to the logger's configuration.

  Default is no warn logging. Specify this setting to activate warn logging into a specific category. Alternatively, override the logException(java.lang.Exception, javax.portlet.PortletRequest) method for custom logging.

  See Also:

  LogFactory.getLog(String), Logger.getLogger(String), Logger.getLogger(String)

• setRenderWhenMinimized

  public void setRenderWhenMinimized​(boolean renderWhenMinimized)

  Set if the resolver should render a view when the portlet is in a minimized window. The default is "false".

  See Also:

  PortletRequest.getWindowState(), WindowState.MINIMIZED

• resolveException

  public ModelAndView resolveException​(RenderRequest request,
                                       RenderResponse response,
                                       Object handler,
                                       Exception ex)

  Checks whether this resolver is supposed to apply (i.e. the handler matches in case of "mappedHandlers" having been specified), then delegates to the doResolveException(javax.portlet.PortletRequest, javax.portlet.MimeResponse, java.lang.Object, java.lang.Exception) template method.

  Specified by:

  resolveException in interface HandlerExceptionResolver

  Parameters:

  request - current portlet request

  response - current portlet response

  handler - the executed handler, or null if none chosen at the time of the exception (for example, if multipart resolution failed)

  ex - the exception that got thrown during handler execution

  Returns:

  a corresponding ModelAndView to forward to, or null for default processing

• resolveException

  public ModelAndView resolveException​(ResourceRequest request,
                                       ResourceResponse response,
                                       Object handler,
                                       Exception ex)

  Description copied from interface: HandlerExceptionResolver
  Try to resolve the given exception that got thrown during on handler execution, returning a ModelAndView that represents a specific error page if appropriate.

  Specified by:

  resolveException in interface HandlerExceptionResolver

  Parameters:

  request - current portlet request

  response - current portlet response

  handler - the executed handler, or null if none chosen at the time of the exception (for example, if multipart resolution failed)

  ex - the exception that got thrown during handler execution

  Returns:

  a corresponding ModelAndView to forward to, or null for default processing

• shouldApplyTo

  protected boolean shouldApplyTo​(PortletRequest request,
                                  Object handler)

  Check whether this resolver is supposed to apply to the given handler.

  The default implementation checks against the specified mapped handlers and handler classes, if any, and also checks the window state (according to the "renderWhenMinimize" property).

  Parameters:

  request - current portlet request

  handler - the executed handler, or null if none chosen at the time of the exception (for example, if multipart resolution failed)

  Returns:

  whether this resolved should proceed with resolving the exception for the given request and handler

  See Also:

  setMappedHandlers(java.util.Set<?>), setMappedHandlerClasses(java.lang.Class<?>...)

• logException

  protected void logException​(Exception ex,
                              PortletRequest request)

  Log the given exception at warn level, provided that warn logging has been activated through the "warnLogCategory" property.

  Calls buildLogMessage(java.lang.Exception, javax.portlet.PortletRequest) in order to determine the concrete message to log.

  Parameters:

  ex - the exception that got thrown during handler execution

  request - current portlet request (useful for obtaining metadata)

  See Also:

  setWarnLogCategory(java.lang.String), buildLogMessage(java.lang.Exception, javax.portlet.PortletRequest), Log.warn(Object, Throwable)

• buildLogMessage

  protected String buildLogMessage​(Exception ex,
                                   PortletRequest request)

  Build a log message for the given exception, occurred during processing the given request.

  Parameters:

  ex - the exception that got thrown during handler execution

  request - current portlet request (useful for obtaining metadata)

  Returns:

  the log message to use

• doResolveException

  protected abstract ModelAndView doResolveException​(PortletRequest request,
                                                     MimeResponse response,
                                                     Object handler,
                                                     Exception ex)

  Actually resolve the given exception that got thrown during on handler execution, returning a ModelAndView that represents a specific error page if appropriate.

  Must be overridden in subclasses, in order to apply specific exception checks. Note that this template method will be invoked after checking whether this resolved applies ("mappedHandlers" etc), so an implementation may simply proceed with its actual exception handling.

  Parameters:

  request - current portlet request

  response - current portlet response

  handler - the executed handler, or null if none chosen at the time of the exception (for example, if multipart resolution failed)

  ex - the exception that got thrown during handler execution

  Returns:

  a corresponding ModelAndView to forward to, or null for default processing