Prerender() in backing file... setting desktop titles dynamically

I have a link in page1 (with pageflow1 and portlet1), clicking on which the user is taken to page2 (with pageflow2 and portlet2) and the begin action method gets called in pageflow2. The begin action forwards to another another action (say, action2). action2 sets some request attributes, then finally forwards to the JSP that needs to be rendered. I have a backing file for portlet2 that has the prerender method implemented. The prerender() checks the request attribute set in action2() and accordingly sets the desktop title.
Now my problem is, the prerender is getting called BEFORE begin action is invoked. Shouldn't the prerender get invoked just beofre the JSP is rendered? If not, then how can I set the desktop title dynamically based on some data in an action?
Thanks in advance!

There are two backing files you can give for a portlet.
1. Backing file for a portlet
2. Backing file for a JSP
Try giving the backing file reference in JSP instead of portlet.
-sampath

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Attachments:
Unbenannt 2_LV80.vi ‏13 KB

Changing shell, look & feel dynamically in desktop backing file

(I apologize if this post is showing up twice - I tried posting with
google groups but it doesn't appear at forums.bea.com, so I wanted to
post again using xnews to make sure it shows up.)
I have a backing file that I am using with my desktop and I need to be
able to change the shell and look & feel dynamically, based on the page
that is currently active. I am doing the following in the preRender()
method:
String newLAF = "myLookAndFeel";
String newShell = "myShell";
// here is where I would determine the appropriate LAF and shell based on the current page
customizationContext = new CustomizationContext(Locale.getDefault(), request);
customizationContext.setVisitorMode(true);
DesktopView desktopView =
PortalBeanManager.getPortalCustomizationManager().getDesktopView(customizationContext, webAppName, new PortalPath(portalPath), new DesktopPath(desktopPath));
DesktopInstanceId dii = desktopView.getDesktopInstanceId();
DesktopInstance di = PortalBeanManager.getPortalCustomizationManager().getDesktopInstance(customizationContext, dii);
LookAndFeelDefinitionId lookAndFeelId = null;
for(int i = 0, n = lookAndFeelDefinitions.length; i < n; i++) {
if(newLAF.equals(lookAndFeelDefinitions.getDefinitionLabel())) {
lookAndFeelId = lookAndFeelDefinitions[i].getLookAndFeelDefinitionId();
break;
di.setLookAndFeelDefinitionId(lookAndFeelId);
ShellDefinitionManager shellManager = PortalBeanManager.getShellDefinitionManager();
ShellDefinitionId shellId = null;
ShellDefinition[] shellDefinitions = getShellDefinitions(webAppName, request.getLocale(), request);
for(int i = 0, n = shellDefinitions.length; i < n; i++) {
String shellName = shellManager.getShellView(customizationContext, shellDefinitions[i].getShellDefinitionId()).getMarkupView().getMarkupDefinition().getName();
if(newShell.equals(shellName)) {
shellId = shellDefinitions[i].getShellDefinitionId();
break;
di.setShellDefinitionId(shellId);
PortalBeanManager.getPortalCustomizationManager().updateDesktopInstance(customizationContext, di);
This works just fine, but I once the portal renders itself in my
browser, I usually have to refresh the page before the changes to the
shell and look & feel are visible. I would like to do this in the
init() method of the backing file but I do not know how to determine
the current active page from within init.
I would appreciate any help you all could give me in finding a solution
so I do not have to refresh the page in order to see the shell and look
& feel changes. Thanks in advance!
Andy

We essentially have 2 "portals" running inside 1 .portal file. We'd
like to be able to use single sign on and entitlements to allow/restrict
access to various parts of the 2 portals (where certain books are
consider part of portal "A" and others part of portal "B"). If you are
logged in as a super-user, you will be able to access everything. If
you are logged in as user type "A" you can only access portal "A," and
similarly for user type "B" and portal "B."
Portals A and B have each have a distinct header, footer (i.e. shell),
and look and feel (skeleton and skin). If a super-user is looking at
portal A, the portal should have portal A's header, footer, and look and
feel, and similarly for portal B.
How would you recommend we accomplish this? Would it make more sense
(and is it possible) to have the header and footer jsps determine what
content to render based on the current book or page, and then use the
code you suggested below to change the look and feel dynamically?
Thanks,
Andy
jolleyc wrote:
in order to pick up the changes for that request you will need to do a redirect back to the server (our login examples shwo you how to do this). this is because the control tree has already been retrieved from the database (so you need to go back and get a new version).
I quick note: If you plan on doing this a lot this is quite a heavy process. if you just need to change the lookAndFeel on the fly you can look at the following ( i t think this is in the tutorial portal)
A) Modify the shell to include a jsp and backing file
<netuix:header>
<netuix:jspContent backingFile="com.acme.DynamicLookAndFeelHeaderBacking" contentUri="/portlets/lookAndFeel/dynamicLookAndFeelHeader/dynamicLookAndFeelHeader.jsp"/>
</netuix:header>
B) backing file looks like
public void init(HttpServletRequest request, HttpServletResponse response)
// Get the session from the request
HttpSession session = request.getSession();
// Get the LookAndFeel object from the PrimaryTheme in the request
LookAndFeel lookAndFeel = LookAndFeel.getLookAndFeel(request);
if (request.getParameter("defaultButton") != null)
session.setAttribute("skin", "default");
if (request.getParameter("textButton") != null)
session.setAttribute("skin", "text");
if (request.getParameter("classicButton") != null)
session.setAttribute("skin", "classic");
String selectedSkin = (String) session.getAttribute("skin");
if (selectedSkin != null)
lookAndFeel.setSkin(selectedSkin);
lookAndFeel.setSkeleton(selectedSkin);
lookAndFeel.reinit();

Can we override the Desktop LAF for Pages using backing Files ?

Hi
I have the following Look And Feel related requirement.
We have an global application level Skin which was applied at the desktop level using the .laf file.
But some of the pages require a totally different Look and Feel apart from the one defined at the desktop level.
To put the question in the other way,
Can we override the skin & skeleton defined at the Desktop level using the backing file (for page or portlet) ?
The following is the code snippet, which i used in the backing file to achive the above.
LookAndFeel lookAndFeel = LookAndFeel.getLookAndFeel(request);
lookAndFeel.setSkin(y_skin);
lookAndFeel.setSkeleton(y_skeleton);
lookAndFeel.reinit();
Here the y_skin & y_skeleton are the new set of skin & skeletion which i have created for the page.
when i ran the above snippet in the portal framework, i found the desktop level skin is getting applied
to the pages insted of the y_skin & y_skeleton.
Any help or directions .... for dynamically changing the skin & skeletion for pages will be appreciated.
Thanks & Regards
- Sachi

What you are doing looks valid.
this is the code that i have
public void init(HttpServletRequest request, HttpServletResponse response)
// Get the session from the request
HttpSession session = request.getSession();
// Get the LookAndFeel object from the PrimaryTheme in the request
LookAndFeel lookAndFeel = LookAndFeel.getLookAndFeel(request);
if (request.getParameter("defaultButton") != null)
//System.out.println("default skin selected");
session.setAttribute("skin", "default");
if (request.getParameter("textButton") != null)
//System.out.println("text skin selected");
session.setAttribute("skin", "text");
if (request.getParameter("classicButton") != null)
//System.out.println("classic skin selected");
session.setAttribute("skin", "classic");
String selectedSkin = (String) session.getAttribute("skin");
if (selectedSkin != null)
//System.out.println("setting skin and skeleton to: '" + selectedSkin + "'");
lookAndFeel.setSkin(selectedSkin);
lookAndFeel.setSkeleton(selectedSkin);
lookAndFeel.reinit();
}

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Hi All,
I have a clipper portlet, and I am setting the preferences(for form based authentication & passing application data dynamically) in the backing file which is then associated to the Clipper portlet. I looked up at the clipper constants that are available; and the example they have given is
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Any input on this would be appreciated.
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G

Hi,
I'm guessing here... but I think that the example is referring to a PortletPreferences object, which can be obtained through a PortletBackingContext with the getPortletPreferences() method. To obtain a PortletBackingContext you just use the static method PortletBackingContext.getPortletBackingContext() and pass in the request in the backing file. See also: Using the Preferences API to Access or Modify Preferences
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Desktop Backing File in Production - How?

Hello.
Is there a way to associate a desktop backing file with a production desktop? (i.e one created entirely out of portal admin - NOT a .portal file).
I know you can create a desktop based upon a .portal file - is this the only way it can be achieved?
Can't find another way...
Any help much appreciated.
Weblogic 8.1 Portal. Service Pack 4.

Hello,
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<script src="fizzbang.js" type="text/javascript"></script>consider using -
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Hope this helps,
John.
Blog: http://jes.blogs.shellprompt.net
Work: http://www.apex-evangelists.com
Author of Pro Application Express: http://tinyurl.com/3gu7cd
REWARDS: Please remember to mark helpful or correct posts on the forum, not just for my answers but for everyone!

Data from itab to be store in text file in desktop

hi
i am tyring to store the data from itab into a text file in desktop,but its now owrking.
i am using open dataset statment,but no where data is storing.My code:
TYPES : BEGIN OF ST_DEMO,
REG_NO(10) TYPE C,
NAME(20)   TYPE C,
ADDR(20)   TYPE C,
END OF ST_DEMO.
DATA : WA_DEMO TYPE ST_DEMO,
IT_DEMO TYPE TABLE OF ST_DEMO,
L_FNAME TYPE dxfile-filename .
PARAMETERS: P_FNAME(128) TYPE C DEFAULT '\usr\sap\put\vipin.txt' OBLIGATORY.
L_FNAME = P_FNAME.
WA_DEMO-REG_NO = '100001'.
WA_DEMO-NAME = 'ANAND'.
WA_DEMO-ADDR = 'NAGARKOVIL'.
APPEND WA_DEMO TO IT_DEMO.
OPEN DATASET L_FNAME FOR OUTPUT IN TEXT MODE ENCODING DEFAULT.
WRITE :5 'REG NUM',16 'NAME',37 'ADDRESS' .
LOOP AT IT_DEMO INTO WA_DEMO.
IF SY-SUBRC = 0.
    TRANSFER WA_DEMO TO L_FNAME.
    WRITE :/5 WA_DEMO-REG_NO,16 WA_DEMO-NAME,37 WA_DEMO-ADDR.
ENDIF.
ENDLOOP.
close DATASET L_FNAME.
please tell me where is the prob?I wan to schedule it for background job.
regds
vipin

hi
here is the code for : "data from itab to be store in text file in desktop"
TABLES: vbak.    " standard table
*                           Type Pools                                 *
TYPE-POOLS: slis.
*                     Global Structure Definitions                     *
*-- Structure to hold data from table CE1MCK2
TYPES: BEGIN OF tp_itab1,
       vbeln LIKE vbap-vbeln,
       posnr LIKE vbap-posnr,
       werks LIKE vbap-werks,
       lgort LIKE vbap-lgort,
       END OF tp_itab1.
*-- Data Declaration
DATA: t_itab1 TYPE TABLE OF tp_itab1.
DATA : i_fieldcat TYPE slis_t_fieldcat_alv.
*                    Selection Screen                                 *
*--Sales document-block
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-t01.
SELECT-OPTIONS: s_vbeln FOR vbak-vbeln.
SELECTION-SCREEN END OF BLOCK b1.
*--Display option - block
SELECTION-SCREEN BEGIN OF BLOCK b2 WITH FRAME TITLE text-t02.
PARAMETERS: alv_list RADIOBUTTON GROUP g1,
            alv_grid RADIOBUTTON GROUP g1.
SELECTION-SCREEN END OF BLOCK b2.
*file download - block
SELECTION-SCREEN BEGIN OF BLOCK b3 WITH FRAME TITLE text-t03.
PARAMETERS: topc AS CHECKBOX,
            p_file TYPE rlgrap-filename.
SELECTION-SCREEN END OF BLOCK b3.
*                      Initialization.                                *
*                      At Selection Screen                            *
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
CALL FUNCTION 'F4_DXFILENAME_4_DYNP'
    EXPORTING
      dynpfield_filename = 'P_FILE'
      dyname             = sy-cprog
      dynumb             = sy-dynnr
      filetype           = 'P'      "P-->Physical
      location           = 'P'     "P Presentation Srever
      server             = space.
AT SELECTION-SCREEN ON s_vbeln.
PERFORM vbeln_validate.
*                           Start Of Selection                         *
START-OF-SELECTION.
*-- Fetching all the required data into the internal table
PERFORM select_data.
*                           End Of Selection                           *
END-OF-SELECTION.
IF t_itab1[] IS NOT INITIAL.
    IF topc IS NOT INITIAL.
      PERFORM download.
      MESSAGE 'Data Download Completed' TYPE 'S'.
    ENDIF.
    PERFORM display.
ELSE.
    MESSAGE 'No Records Found' TYPE 'I'.
ENDIF.
*                           Top Of Page Event                          *
TOP-OF-PAGE.
*& Form           :      select_data
* Description     : Fetching all the data into the internal tables
* parameters    : none
FORM select_data .
SELECT vbeln
     posnr
     werks
     lgort
     INTO CORRESPONDING FIELDS OF TABLE t_itab1
     FROM vbap
     WHERE vbeln IN s_vbeln.
IF sy-subrc <> 0.
    MESSAGE 'Enter The Valid Sales Document Number'(t04) TYPE 'I'.
    EXIT.
ENDIF.
ENDFORM.                    " select_data
*& Form        : display
* decription : to display data in given format
* parameters   : none
FORM display .
IF alv_list = 'X'.
    PERFORM build_fieldcat TABLES i_fieldcat[]
                           USING :
*-Output-field Table      Len Ref fld Ref tab Heading    Col_pos
   'VBELN'       'T_ITAB1'     10   'VBAP' 'VBELN'    ''            1,
   'POSNR'       'T_ITAB1'     6    'VBAP' 'POSNR'    ''            2,
   'WERKS'       'T_ITAB1'     4    'VBAP' 'WERKS'    ''            3,
   'LGORT'       'T_ITAB1'     4    'VBAP' 'LGORT'    ''            4.
    CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
      EXPORTING
        i_callback_program       = sy-repid
*        i_callback_pf_status_set = c_pf_status
        i_callback_user_command = 'USER_COMMAND '
*        it_events                = t_alv_events[]
        it_fieldcat              = i_fieldcat[]
      TABLES
        t_outtab                 = t_itab1[]
      EXCEPTIONS
        program_error            = 1
        OTHERS                   = 2.
    IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
    ENDIF.
ENDIF.
IF alv_grid = 'X'.
    PERFORM build_fieldcat TABLES i_fieldcat[]
                             USING :
*-Output-field Table      Len Ref fld Ref tab Heading    Col_pos
     'VBELN'       'T_ITAB1'     10   'VBAP' 'VBELN'    ''            1,
     'POSNR'       'T_ITAB1'     6    'VBAP' 'POSNR'    ''            2,
     'WERKS'       'T_ITAB1'     4    'VBAP' 'WERKS'    ''            3,
     'LGORT'       'T_ITAB1'     4    'VBAP' 'LGORT'    ''            4.
    CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
      EXPORTING
        i_callback_program       = sy-repid
*        i_callback_pf_status_set = c_pf_status
        i_callback_user_command = 'USER_COMMAND '
        it_fieldcat              = i_fieldcat
      TABLES
        t_outtab                 = t_itab1[]
    EXCEPTIONS
   program_error                     = 1
   OTHERS                            = 2.
    IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
    ENDIF.
ENDIF.
ENDFORM.                    " display
*& Form        : vbeln_validate
* description : to validate sales document number
* parameters   : none
FORM vbeln_validate .
DATA: l_vbeln TYPE vbak-vbeln.
SELECT SINGLE vbeln
    FROM vbak
    INTO l_vbeln
    WHERE vbeln IN s_vbeln.
IF sy-subrc NE 0.
    MESSAGE 'ENTER THE VALID SALES DOCUMENT NO:' TYPE 'I'.
    EXIT.
ENDIF.
ENDFORM.                    " vbeln_validate
*& Form       :build_fieldcat
* Description : This routine fills field-catalogue
* Prameters : none
FORM build_fieldcat TABLES fpt_fieldcat TYPE slis_t_fieldcat_alv
                    USING   fp_field     TYPE slis_fieldname
                            fp_table     TYPE slis_tabname
                            fp_length    TYPE dd03p-outputlen
                            fp_ref_tab   TYPE dd03p-tabname
                            fp_ref_fld   TYPE dd03p-fieldname
                            fp_seltext   TYPE dd03p-scrtext_l
                            fp_col_pos   TYPE sy-cucol.
*-- Local data declaration
DATA:   wl_fieldcat TYPE slis_fieldcat_alv.
*-- Clear WorkArea
wl_fieldcat-fieldname       = fp_field.
wl_fieldcat-tabname         = fp_table.
wl_fieldcat-outputlen       = fp_length.
wl_fieldcat-ref_tabname     = fp_ref_tab.
wl_fieldcat-ref_fieldname   = fp_ref_fld.
wl_fieldcat-seltext_l       = fp_seltext.
wl_fieldcat-col_pos         = fp_col_pos.
*-- Update Field Catalog Table
APPEND wl_fieldcat TO fpt_fieldcat.
ENDFORM.                    "build_fieldcat
*& Form        : download
* description : To Download The Data
* Parameters : none
FORM download .
DATA: l_file TYPE string.
l_file = p_file.
CALL FUNCTION 'GUI_DOWNLOAD'
    EXPORTING
      filename                = l_file
      filetype                = 'ASC'
    TABLES
      data_tab                = t_itab1
    EXCEPTIONS
      file_write_error        = 1
      no_batch                = 2
      gui_refuse_filetransfer = 3
      invalid_type            = 4
      no_authority            = 5
      unknown_error           = 6.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDFORM.                    " download
hope it will help you
regards
rahul

No backing file methods in dropdown

I am working through the <b>Establishing Interportlet Communications by Using Custom and Page Flow Event Handlers: An Example</b>http://edocs.bea.com/wlp/docs81/ipcguide/custevent.html#999127
I have created my backing files in step2 and have completed much of step 3. However, when I get to the point in the tutorial where I am to choose the backing file method, there is nothing in the dropdown. The backing files have been compiled and the classes are in WEB-INF/classes/backing folder.
Any ideas what might be causing this?

Stephen Davidson wrote:
I am working through the <b>Establishing Interportlet Communications by Using Custom and Page Flow Event Handlers: An Example</b>http://edocs.bea.com/wlp/docs81/ipcguide/custevent.html#999127
I have created my backing files in step2 and have completed much of step 3. However, when I get to the point in the tutorial where I am to choose the backing file method, there is nothing in the dropdown. The backing files have been compiled and the classes are in WEB-INF/classes/backing folder.
Any ideas what might be causing this?I think that you just point to the backing file and not a method
specifically. If you override the preRender method, it always gets
executed prior to rendering whatever resource (desktop, book, page or
portlet you have it bound to) and if you override the handlePostBack
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Changing current page from backing file

Using WL 8.1 SP4
I have a User Acceptance Policy page in my portal, and I want to ensure that users have viewed this page before I allow them to view any other content.
When users have viewed the UAP, I set a session variable. I then use the session variable in my entitlements, so there's no problem with them viewing content they shouldn't.
The problem I have is that if users try to access a page directly (or their session has expired), they're left with a blank page (as they're not entitled to see anything), rather than being sent to something helpful (i.e. the UAP).
So I need a backing file. It can either be on every page (except the UAP), or I can put it on the book - whatever is recommended.
I've tried this as a page backing file:
public class UAPCheck extends AbstractJspBacking {
public boolean handlePostbackData(HttpServletRequest request, HttpServletResponse response){
PageBackingContext pbc = PageBackingContext.getPageBackingContext(request);
if (pbc.getLabel().equals("uap_page")
|| request.getSession().getAttribute("UAP Accepted") != null){
return true;
} else {
pbc.setupPageChangeEvent("uap_page");
return true;
I've applied this to pages in my book, however nothing happens - the page change request never fires!
So what's happening here? Am I misunderstanding what setupPageChangeEvent is for?
Help is appreciated.
darren

In the past I have done it as follows:
1. Create a backing file for the book that has these pages.
2. In the preRender of the backing file do the following
BookBackingContext bbc=
BookBackingContext.getBookBackingContext(getRequest());
if( //check to see if page change event is needed)
{PageBackingContext pbc_current =
        bbc.getActivePageBackingContext();
    pbc_default.setActive(false);
    PageBackingContext pbc_pageToBeShown=
        bbc.getPageBackingContextByDefinitionLabel("//
        def label of page to be shown, in your
        case 'uap_page'");
    pbc_pageToBeShown.setActive(true);
    return true;
else return true;
3. link the backing file to book
Recommendations:
* Don't use backing files for Portal components if they are not needed. (From your post, if I am not wrong, you are using backing files for all pages in the book which is not necessary and can cause unnecessary complications)
* Read this doc to understand life-cycle methods of portal components http://edocs.bea.com/wlp/docs81/pdf/taxonomy.pdf
Peruse the above document to understand what is going wrong with your code.
* Remember that the life cycle methods for components that are not active will not be rendered if treeOptimizationEnable parameter is set to true ( this parameter can be seen in workshop under property editor)
* When calling one of the setupxxevent methods, it must be done on the backing context that the backing file is tied to. If you do not do this the event may not get fired. For more info click http://e-docs.bea.com/wlp/docs81/whitepapers/netix/body.html
Seenu
Seenu.

Backing file init method always called for proxy portlets

Hello,
We are currently using Weblogic Portal 10 MP1. Deployed within our Portal EAR is a local proxy portlet and attached to this proxy portlet is a backing file, which currently implements the init() and prerender() methods from the backing interface.
When this is placed in a page that is within a desktop, the init() method is always invoked no matter which page you access within the desktop. As I understand it from the documentation, if you have "tree optimization" turned on, then the init() method will only be called when rendering the actual page the proxy portlet is in. But this doesn't seem to be the case. However, if I define a standard Java portlet within the EAR and attach a backing file, then the init() follows the rules when tree optimization is turned on or off.
Does anyone know if this is a defect within the portal framework, or is this expected and proxy portlets do not follow this rule?
And I guess, if it is a defect or known limitation, is there a possible workaround? I assume the simplest workaround will be to move the logic into the prerender() method.
Regards,
Jonathan

Hello Jonathan,
Tree optimization is a tricky thing- some portlets may still be initialized even when the page they are on isn't visible. The rules for which get initialized and which don't are very complicated and depend on a number of things, so it is just best to not rely on the init() method not getting called.
By far the best option for your use-case is to have the proxy portlet listen to the "onRefresh" event, and move the logic from the backing file's init() method into an event-handling method in the backing file, then have this method called when the refresh event is received. Here's a sample portion of the .portlet file for doing this:
<netuix:handlePortalEvent event="onRefresh" eventLabel="onRefreshEvent">
<netuix:invokeBackingFileMethod method="handleRefreshEvent"/>
</netuix:handlePortalEvent>The "onRefresh" event is sent to the portlet only when it is visible on the page, so it should work perfectly for your use-case.
Kevin

Prerender() in backing file... setting desktop titles dynamically

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