This description is off the top of my head, but I know for sure that I had problems when I didn't set it.
There are some places in MyFaces where it needs to cast
ExternalContext.getContext() as either a PortletContext or a
ServletContext. MyFaces shouldn't require having a portlet.jar so it
cannot make the determination of the type of request based on
"instanceof" checks and casting. So it determines the request type with
an attribute flag. setPortletRequestFlag() sets that.
I figured this out by looking at the source and reading some discussion
in the JIRA issue tracker regarding the initial creation of
MyFacesGenericPortlet. Look into those areas if you want more info.
Dave
Patrick Dalla Bernardina wrote:
> What is setPortletRequestFlag(request); for?
>
>
>
> Dave Brondsema wrote:
>
>> Cool. Make sure you call setPortletRequestFlag(request); before
>> nonFacesRequest.
>>
>> It might be useful to include part of this on the wiki page as an
>> example for anyone else who wants to do that.
>>
>> Patrick Dalla Bernardina wrote:
>>
>>
>>> With your help I've made an improvement to the implementation in wiki
>>> page.
>>>
>>> Before calling nonFacesRequest I call an action of an bean called
>>> PortletBackBean.
>>> If this bean is not declared in managed beans, no method is called.
>>> I'm showing only doEdit, but the same can be applied to doView.
>>>
>>>
>>> public void doEdit(RenderRequest request, RenderResponse
>>> response)throws PortletException, IOException {
>>> Boolean isPortletModeChanged =
>>> (Boolean)request.getAttribute(ATTR_PORTLET_MODE_CHANGED);
>>>
>>> if (isPortletModeChanged.booleanValue()) {
>>> response.setContentType("text/html");
>>>
>>> FacesContext fctx = facesContext(request, response);
>>> if(fctx!=null){
>>> MethodBinding mb =
>>> fctx.getApplication().createMethodBinding("#{PortletBackBean.edit}",
>>> null);
>>> if(mb!=null){
>>> try{
>>> Object methodResult = mb.invoke(fctx, null);
>>> }catch(PropertyNotFoundException e){
>>> /* if the managed bean is not faound ignore the
>>> calling*/
>>> }
>>> }
>>> }
>>>
>>> nonFacesRequest(request, response, defaultEdit);
>>> return;
>>> }
>>>
>>> facesRender(request, response);
>>> }
>>>
>>>
>>>
>>>
>>> Dave Brondsema wrote:
>>>
>>>
>>>
>>>> Patrick Dalla Bernardina wrote:
>>>>
>>>>
>>>>
>>>>
>>>>> How can I call an managed bean action when portlet mode (EDIT,VIEW) is
>>>>> changed and process the navigation rules to discover the page to be
>>>>> rendered?
>>>>>
>>>>>
>>>>
>>>> You can use http://wiki.apache.org/myfaces/UsingPortletModes as a
>>>> starting point.
>>>>
>>>> To invoke a managed bean action, something like this will work I think:
>>>>
>>>> ValueBinding binding =
>>>> FacesContext.getCurrentInstance().getApplication().createValueBinding("#{myBean.someAction}");
>>>>
>>>>
>>>> Object methodResult =
>>>> binding.getValue(FacesContext.getCurrentInstance());
>>>>
>>>>
>>>>
>>>>
>>>>
>>
>>
>>
>>
>>
>
--
Dave Brondsema
Software Developer
Cornerstone University
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