Disadvantages of using page flows

Hello Friends,
I am using page flows for the first time. I would also need to run the web application under another j2ee server. I know that we can use the portability kit to do this transformation.Even though I understand that using page flows have certain advantages, I wanted to know whether there are disadvantages to using it too?
Some specific questions I had was:
1. Does using page flows slow down the web application?
2. Does using page flows increase the web app size?
3. Does it make it difficult to maintain?
4. Does using the portability kit have some disadvantages?

Hi Gabriel,
using BPm is always advantageous only thing is that complex scenarios are named as BPM.So it is complex
once you get the idea of BPM then no disadvanges.
/people/krishna.moorthyp/blog/2005/06/09/walkthrough-with-bpm - Walk through BPM
/people/siva.maranani/blog/2005/05/22/schedule-your-bpm - Schedule BPM
/people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi - Use of Synch - Asynch bridge in ccBPM
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] - Use of Synch - Asynch bridge in ccBPM
**PS:Reward points if useful**
Regards,
Sumit Gupta

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Kar,
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kar piyush wrote:
Eddie
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http://www.oracle.com/technetwork/developer-tools/adf/learnmore/adfinsider-093342.html#a2

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>
Here you go :
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normal
request object.
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keith shacks wrote:
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Using Task Flow in the template page

Dear all,
I am beginer and I work with JDev 11.1.1.3.0
In my application I've got a template page called 'templateDef1.jspx'. In this page on the top facet I've got two commands link: 'Asort' and 'Reports'.
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Edited by: kojot on 2011-01-13 03:55

Thank you a lot for you replies.
Amit, I tried your solution but something doesn't work. I think the parameter isn't passing into the task flow.
In my template page, after I added <af:setActionListener> I got two warnings: Reference "PageFlowScope.Flow" not found.
The ref Center facet is refreshing properly, but it always displays the assort.jsff, because it is marked as default activity in my task flow.
Here is the fragment of code of template page:
<af:commandLink id="clAsort">
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                                       valign="middle" layout="vertical">
                    <af:image source="/ikony/asortyment.jpg" id="pt_i1"
                              shortDesc="Asortyment"/>
                    <af:outputLabel value="Asortyment" id="pt_ol1"
                                    inlineStyle="color:Blue;"/>
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                  <af:setActionListener from="#{'A'}"
                                        to="#{pageFlowScope.Flow}"/>
                </af:commandLink>
                <af:spacer width="30" height="10" id="pt_s1"/>
                <af:commandLink id="clReport">
                  <af:panelGroupLayout id="pt_pgl3" halign="center"
                                       valign="middle" layout="vertical">
                    <af:image source="/ikony/raporty.jpg" shortDesc="Raporty"
                              id="pt_i2"/>
                    <af:outputLabel value="Raporty" id="pt_ol2"
                                    inlineStyle="color:Blue;"/>
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                  <af:setActionListener from="#{'R'}"
                                        to="#{pageFlowScope.Flow}"/>
                </af:commandLink>And the code of the whole task flow definition:
<?xml version="1.0" encoding="windows-1250" ?>
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
<task-flow-definition id="page-frag-task-flow">
    <default-activity id="__1">asort</default-activity>
    <data-control-scope id="__24">
      <shared/>
    </data-control-scope>
    <input-parameter-definition id="__12">
      <name id="__13">Flow</name>
      <value>#{pageFlowScope.Flow}</value>
      <class>java.lang.String</class>
    </input-parameter-definition>
    <view id="asort">
      <page>/fragments/asort.jsff</page>
    </view>
    <view id="raport">
      <page>/fragments/raport.jsff</page>
    </view>
    <router id="router1">
      <case>
        <expression>#{pageFlowScope.Flow == 'A'}</expression>
        <outcome id="__18">asortView</outcome>
      </case>
      <case>
        <expression>#{pageFlowScope.Flow == 'R'}</expression>
        <outcome id="__23">raportView</outcome>
      </case>
      <default-outcome>raportView</default-outcome>
    </router>
    <control-flow-rule id="__2">
      <from-activity-id id="__3">asort</from-activity-id>
      <control-flow-case id="__4">
        <from-outcome id="__6">viewRaport</from-outcome>
        <to-activity-id id="__5">raport</to-activity-id>
      </control-flow-case>
    </control-flow-rule>
    <control-flow-rule id="__7">
      <from-activity-id id="__8">raport</from-activity-id>
      <control-flow-case id="__10">
        <from-outcome id="__11">viewAsort</from-outcome>
        <to-activity-id id="__9">asort</to-activity-id>
      </control-flow-case>
    </control-flow-rule>
    <control-flow-rule id="__14">
      <from-activity-id id="__15">router1</from-activity-id>
      <control-flow-case id="__17">
        <from-outcome id="__19">asortView</from-outcome>
        <to-activity-id id="__16">asort</to-activity-id>
      </control-flow-case>
      <control-flow-case id="__20">
        <from-outcome id="__22">raportView</from-outcome>
        <to-activity-id id="__21">raport</to-activity-id>
      </control-flow-case>
    </control-flow-rule>
    <use-page-fragments/>
</task-flow-definition>
</adfc-config>In main.jspx page, after I dropped the task flow as region, I left the parametersMap blank and I set the value to the parameter Flow as #{pageFlowScope.Flow}. Am I doing it right ? I have to missed something becuase it doesn't work.
I also read ADF Handbook and some blogs to get know how to pass parameters into bounded task flow, but I couldn't solve my problem.
Regards,
Wojtek.

Page flow exception

I have one serious problem when handling exception in page flow. ie.
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// Generated by WebLogic Workshop
// Created on: Mon Dec 01 15:31:45 GMT+05:30 2003
// By: kshashishekar
package portlets.validation.validation;
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import com.bea.wlw.netui.pageflow.Forward;
import com.bea.wlw.netui.pageflow.PageFlowController;
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import javax.servlet.http.HttpServletRequest;
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import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.*;
import com.login.CustomLogin;
import com.bea.p13n.controls.login.UserLoginControl;
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* 
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* <property value="East_1" name="toPort"/>
* </pageflow-object>
* <pageflow-object id="page:validate1Page1.jsp">
* <property value="420" name="x"/>
* <property value="180" name="y"/>
* </pageflow-object>
* <pageflow-object id="action-call:@page:Result.jsp@#@action:validate1.do#portlets.validation.validation.validationController.ValidateForm@">
* <property value="156,170,170,184" name="elbowsX"/>
* <property value="332,332,203,203" name="elbowsY"/>
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* <property value="West_2" name="toPort"/>
* </pageflow-object>
* <pageflow-object id="page:Result.jsp">
* <property value="120" name="x"/>
* <property value="340" name="y"/>
* </pageflow-object>
* <pageflow-object id="page:/error.jsp">
* <property value="40" name="x"/>
* <property value="180" name="y"/>
* </pageflow-object>
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* <property value="316,350,350,384" name="elbowsX"/>
* <property value="52,52,172,172" name="elbowsY"/>
* <property value="East_1" name="fromPort"/>
* <property value="West_1" name="toPort"/>
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* </pageflow-object>
* <pageflow-object id="forward:path#success#Result.jsp#@action:validate1.do#portlets.validation.validation.validationController.ValidateForm@">
* <property value="184,170,170,156" name="elbowsX"/>
* <property value="192,192,332,332" name="elbowsY"/>
* <property value="West_1" name="fromPort"/>
* <property value="East_1" name="toPort"/>
* <property value="success" name="label"/>
* </pageflow-object>
* <pageflow-object id="forward:path#success#validate1Page1.jsp#@action:logout.do#portlets.validation.validation.validationController.ValidateForm@">
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* <property value="92,92,172,172" name="elbowsY"/>
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* <property value="West_1" name="toPort"/>
* <property value="success" name="label"/>
* </pageflow-object>
* <pageflow-object id="control:com.bea.p13n.controls.login.UserLoginControl#myControl">
* <property value="28" name="x"/>
* <property value="34" name="y"/>
* </pageflow-object>
* <pageflow-object id="formbeanprop:portlets.validation.validation.validationController.ValidateForm#username#java.lang.String"/>
* <pageflow-object id="formbeanprop:portlets.validation.validation.validationController.ValidateForm#password#java.lang.String"/>
* <pageflow-object id="formbean:portlets.validation.validation.validationController.ValidateForm"/>
* </view-properties>
public class validationController extends PageFlowController
* This is the control used to generate this pageflow
* @common:control
private UserLoginControl myControl;
// Uncomment this declaration to access Global.app.
// protected global.Global globalApp;
// For an example of page flow exception handling see the example "catch"
and "exception-handler"
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* @jpf:forward name="success" path="validate1Page1.jsp"
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private String username;
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this.username = username;
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return this.username;
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ActionErrors errors = null;
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}catch (Exception e)
e.printStackTrace();
if (errors ==null) {
System.out.println ("errors = "+errors);
} else
System.out.println ("errors= "+errors);
return errors;
in the above code when we call "validate1" action, it will authenticate successfully
when we enter valid username and passowrd.
But when i enter invalid credentials page flow controller should execute "handleException"
method but at this time i am getting an error
Page Flow Unhandled Exception
Exception: java.lang.IllegalArgumentException
Message: argument type mismatch
A java.lang.IllegalArgumentException exception was thrown and not handled by any
Page Flow. See the console for the exception stack trace.
please help us on how to rectify this error.
thanks,
shashi
[validationController.jpf]

Hi-
That may be on the right track, but the /index.jsp page gets displayed in the
portlet...I am still within the portal framework, so I don't think I am loosing
the context...
-Howie
"Khurram Zafar" <[email protected]> wrote:
>
you are most likely redirecting to the /error.jsp page and losing the
context for
your portal app. The index.jsp page may be defined as your <welcome-file>
in your
web.xml file. The best thing to do is to save the context before visiting
error.jsp
and then provide a link in error.jsp to go back. Look at javadoc for
PageURL for
obtaining the URL to a portal page, you can then save it in session of
pass it
to your error page.
"Howie Oakes" <[email protected]> wrote:
Hello-
I have a page flow portlet that I am testing some exception handling
on. Right
now when I catch an exception, I display the global /error.jsp page,
using the
@jpf:catch tag. The problem is when I refresh the page after viewing
the error
page, the pageflow always pulls up the /index.jsp page at the root of
the webapp.
I have to get a new session to see the original page flow.
This only happens when I am running the Jpf as a portlet...I don't see
this behavior
with it stand-alone.
I am not sure why the index.jsp page is being called...there are noreferences
to it in my jpf code...
thanks,
Howie

Multiple Browsers with the same Page Flow

I have a legacy application that I am working on migrating to Weblogic. The
legacy application allowed the user to have multiple windows of the same
module open at the same time. Users found this useful if they wanted to look
at two different records in the same module. For example, if you had a
registration app and you wanted to look at Joe's registration information
and Sue's registration. Is it possible to have two browsers within the same
session open and pointing to the same RegistrationController.jpf?
Thank You.
Michelle

I believe our problem is that our form beans are class members of the page
flow thus when you open another instance of the same controller the form
beans are overwritten. Our GUI is displayed as modules containing multiple
tabs with a form bean for each tab. The module has a controller, signifying
the page flow for the module. So, one record in a module will span multiple
tabs. We did not want to have one big form bean that is why we multiple
form beans. But it now looks like we will need to store these form beans
perhaps to the session in a collection identified by the window instance
they belong to.
We also need to do multiple different page flows but I don't think nested
page flows will not work here because the page flows would almost need to be
nested of each other. I guess you could almost think of as each module is
an independent application however some can be invoked by others.
<Rich Feit> wrote in message news:[email protected]..
Hi Michelle,
Yes, that should be just fine. That page flow will remain the "current
page flow" as requests from both browser windows hit it. The NetUI
runtime synchronizes the action methods, so you don't need to worry about
thread-safety within them.
There's also a way to have multiple different active page flows at the
same time, but in this case you don't need to do anything special.
Rich

Multiple instances of Page Flows

I have a legacy application that I am working on migrating to Weblogic. The
legacy application allowed the user to have multiple windows of the same
module open at the same time. Users found this useful if they wanted to look
at two different records in the same module. For example, if you had a
registration app and you wanted to look at Joe's registration information
and Sue's registration. Is it possible to have two browsers within the same
session open and pointing to the same RegistrationController.jpf?
We currently have our form beans stored in the page flow which seems to
cause a problem as when we open another browser instance in the same session
pointing to the same page flow, the form beans from the first window are
overwritten. An approach we are possbily looking at is to store the form
beans in an object in the session and identify a set of form beans as
belonging to a particular window instance - perhaps by uniquely naming the
windows as they are opened.
Has anyone done this before with needing to have multiple instances of the
same page flow or multiple instances of different non-nested page flows open
at the same time?
Michelle

Hi Vijay,
Thanks for the reply, But that's not the right aproach.
I cannot change the application to stateless, Since the standard application where the page resides is statefull.
Also some of the business logic I cannot achive with stateless application
Regards
Geogy

Disadvantages of using page flows

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