Shared Data Control

Dear All,
I often find myself reading documents regarding
shared data control and transaction in taskflow but I often
scratch my head what does it mean?
I googled about it but cant find a good resource othat explains the relevance of the topic
in ADF programming.
Can somebody please share a link or a resource where I could read about it?
Thanks.

http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/taskflows_parameters.htm#ADFFD1693
http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/bclookups.htm#ADFFD1596
"Use Existing Transaction if Possible and Shared data control scope options should be used, as, this option will reuse an existing transaction if available from the calling task flow, or, establish a new transaction if one isn't available."

Similar Messages

Clarification?: Frank & Lynn's book - task flow "shared" data control scope

I'm seeking clarification around shared data control scopes please, regarding a point made in Frank Nimphius and Lynn Munsinger's "Oracle Fusion Developer Guide" McGraw-Hill book.
On page 229 there is a note that states "The data control scope can be shared only if the transaction is also shared". Presumably this implies that only the transaction options "Always Use Existing Transaction" or "Use Existing Transaction if Possible" are applicable for a shared data control scope.
However this seems at odds with what the IDE supports, as you can also select the transaction options "<No Controller Transaction>" and "Always Begin New Transaction" when the data control scope is set to shared.
What's correct? The IDE or the book?
Your assistance appreciated.
CM.

Chris,
"The data control scope can be shared only if the transaction is also shared"
At least the book stands correct for what I could test in a simple test case:
1. no transaction - no sharing
- no master/detail synchronization. DC are bot shared
- commit in called btf does not commit caller task flow
2. "always use existing" transaction selects shared Data Control and automatically disables this field so there is no other option for this
3. Share DataControl and "Always begin transaction"
Committing transaction in called btf also commits the transaction in calling TF
So bottom line is that the transaction handling in ADFc appears to be confusing as it only is a directive for the DataControl to interpret.
Also see page 14 "Task flow "new transaction" vs. "new db connection"" of : http://www.oracle.com/technetwork/developer-tools/adf/learnmore/march2011-otn-harvest-351896.pdf
In ADF BC it seems that separated transactions only exist if you use isolated mode. If you use shared and new transaction then basically the transactions are not isolated.
Frank
Ps.: I took an action item to follow up with development about what the expected ADF BC behavior for the controller settings are.

Sharing Data control Frame

Guys,
I have a issue with sharing data control frame.
I have a search page. From the search results, if the users clicks on a result row, i have to open a NEW TAB providing details of the row. So everytime the user can go back to search tab, and click on the row to open in a new tab.
For that, I'm launching a new Taskflow everytime the user clicks on the row in the serch rsults table. That taskflow is set to Transaction : <No Controller Transaction>. so each time you gonna lauch a new tab, it gonna consume a new data control frame. (and use as many DB connections)
But i dont want that. so i set the Transaction to 'share the data controls with the calling taskflow' and '<always use existing transaction>'. But the problem is all the tabs showing the same information, which i dont want.
How can i overcome the issue without using multiple Data source connections(i mean holding multiple data control frame)?
Any help appreciated...

@shay, we can't use that configuration. When using <always use existing transaction>, we need to share data control.
otherwise, we will endup in this error, "Existing transaction is required when calling task flow"
@amseth -> which means it shows the data for last selected row in the search results.
I'm working to find a solution. Any help, appreciated..

Shared data controls and Ctrl+N

Hi,
From the oracle docs page mentioned below
http://docs.oracle.com/cd/E14571_01/web.1111/b31974/taskflows_parameters.htm#CHDIEDEH
I have a question regarding the line "However, if an end user uses the Ctrl+N keys to open a new browser window, the two windows have the same server-side state and share data control instances." from shared data control instances topic.
If we issue Ctrl+N, it opens a new window and the default being a blank page we would be required to navigate to our application once again. Wouldnt that create a new server session anyways?
Under what circumstance would Ctrl+N reuse the same server session from the old window and share the same instance of data control? Can someone tell me a test case to verify if the new window is using the same data control instance?

Hi,
the doc basically says that you work in a separate data control frame, which means you are in the same session but a new transaction. read this for best practices and some more background information
http://one-size-doesnt-fit-all.blogspot.com/2011/10/pageflowscope-with-unbounded-task-flows.html
Frank

How best 2 use Shared AM in taskflow -new transaction/isolated data control

Hi all
I have nearly 800 screens in my app (under 20 or so different AMs), in which I access some Common VOs to work with by applying filtering (on Secondary Rowset, on Default Rowset using View criteria) on that, Used as View Accessor VO (List of Values) & Sorting. These common VOs are not DB driven but custom java datasource implemented and once it is loaded with data, data will not change. I use Dynamic tab shell to load the screens as separate task-flows. These task-flows are defined to be opened with New Tansaction/Isolated Datacontrol. Right now these Common VOs are shuttled in a default scoped AM (Say 'LookupAM') and attached the same as nested AM for the other AMs.
With the above design, the current behavior is whenever I load a task-flow in Dynamic tab shell, it creates a fresh instance for Shreen AM as well as LookUpAM (I tested by including println inside prepareSession() API of AM Implementation class).
I feel I'll get benefitted in terms of memory saving/performance when I use only one instance of LookupAM for all the screens. I prepared a sample app that mimic our actual application, but made the LookupAM to be a Application scoped shared AM (lets say SharedLookupAM). I've also made all the LOV View accessors comes from this Shared AM. When I run this sample, the behavior is every time I load the task-flow, still the framework creates Am instance for both screen AM and SharedLookupAM! Why so?
Question:
1. Considering my application design (i.e. consuming Shared AM instance from inside the task-flow which are desinged to be opened with new transaction/isolated datacontrol), will I get benefitted in any way If i use Shared AM. If so, what are all the possible type of usages of shared AM for my design?
2. Why framework creates instance of Shared AM everytime I load the task-flow. Does it meant task-flow settings takes the precedence over the Shared AM configuration and it overrides that?
Thanks in advance.
Raghu
Edited by: Raguraman on Apr 9, 2013 3:25 AM

Hi,
+1. Considering my application design (i.e. consuming Shared AM instance from inside the task-flow which are desinged to be opened with new transaction/isolated datacontrol), will I get benefitted in any way If i use Shared AM. If so, what are all the possible type of usages of shared AM for my design?+
Isolated data control settings are the most expensive settings you can have in ADF. They should be used only if the requirement for the task flow is to be atomic in that it can be committed or rolled back independently. If this is not the case for your use cases, then using shared data control is a better option to use. Note that my expectation to application scope AM is that the AM instance is created per user but that the data cache is only queried once.
+2. Why framework creates instance of Shared AM everytime I load the task-flow. Does it meant task-flow settings takes the precedence over the Shared AM configuration and it overrides that?+
Well, you tell it to do so. With the setting of isolated to the Data Control you explicitly tell it to open a new transaction in which case a new instance is created.
Frank

Data-control-scope=shared is not working

Steve Muench said in January 2010 in that post {thread:id=1012099}
"In order to share the connection/transaction when data-control-scope=shared, today as an implementation detail we do AM nesting for you at runtime when using task flow calls”
From that thread I understood that: by setting *"data-control-scope"* to *"shared"* +(this is the default in 11.1.1.3.0)+ in _task flow definition file_ +(in behavior section)+, it should make the task-flow using the same database connection than the _parent’s application module_.
*Is that true?*
If so, it is not working for me.
<li>I’ve created 2 _independents_ ADF Fusion Applications : *MyMainApp* and *MyTFlow* </li>
<li>Each application has a Model and a ViewController projects.</li>
<li>Each application has one ViewObject and one Application Module.</li>
<li>MyMainApp/Model contains MyMainService Application Module & AllEmployeesView ViewObject </li>
<li>MyTFlow/Model contains MyTFlowService Application Module & AllDepartmentView ViewObject</li>
<li>MyMainService and MyTFlowService have the same JDBC Datasource (jdbc/GCCDS).</li>
<li>_In MyTFlow/ViewController project_</li>
<li>I’ve created one page fragment and dragged & dropped AllDepartmentView as an ADF Read-Only Table</li>
<li>I’ve created one Task Flow (allDept-task-flow-definition) and added the pageFragment onto it.</li>
<li>I’ve set the “data-control-scope” to “shared” (it was the default) </li>
<li>I’ve created a new deployment profile (ADF Library Jar) and deployed the jar file </li>
<li>_In MyMainApp/ViewController project_</li>
<li>I’ve created a JSF Page (home.jspx)</li>
<li>I’ve dragged & dropped AllEmployeesView as an ADF Read-Only Form. </li>
<li>I’ve dragged & dropped the “allDept-task-flow-definition” from “Resource Palette” onto the JSF Page. It automatically put it inside an af:region and imports the jar file to the Libraries (ADF Library)</li>
<li>I run the home.jspx page. It works fine but with *2 database connections!*</li>
I think I’ve missed something.
Best Regards
Nicolas

Hi,
the problem is that the Application Modules are root modules and therefore open a new database connection. Only nested application modules reuse the connection of the parent AM. Andrejus Baranovski did blog about this and came up with the suggestion to build reusable projects such that the model and the view controller parts are deployed separately into ADF Libraries and then combined in a super ADF Librery. This way you can use nested application modules (a single datase connection)
http://andrejusb.blogspot.com/2010/10/how-to-reduce-database-connections-and.html
http://andrejusb.blogspot.com/2010/06/adf-regions-and-nested-application.html
Note that IMO the real power of shared Data Controls comes when you use ADF Regions in an application as a mean of modularization.
Frank

Managed Beans vs. POJO Data Control for sharing data

Hi,
I am currently using JAX-WS proxy client and POJO Data Controls to retrieve data from web services. This data needs to be shared across users. Normally I would use application scoped managed beans for this, but since I prefer using data controls and the binding layer, would using static POJO Data Control classes achieve the same thing?

Hi,
Data Controls don't exist across user sessions so in your use case use a managed bean in application scope. If you want to make this available from a Data Control
- create a POJO
- Use EL in the POJO to access the managed bean
- Create a DataControl from the POJO
This way the Data Control exposes the data as an API but itself always reaches out to the managed bean as a data store/cache
Frank

NPE when using POJO Data Control deployed as webcenter shared Lib

Hello everyone,
I am using Jdevelopper 11.1.1.7...
I have a methodAction Binding defined for a JSFF. I am executing this methodAction in a managed bean. When doing so I have the following exception:
Caused By: oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.lang.NullPointerException, msg=null
at oracle.adf.model.binding.DCDataControlReference.getDataControl(DCDataControlReference.java:118)
at oracle.adf.model.BindingContext.instantiateDataControl(BindingContext.java:1128)
at oracle.adf.model.dcframe.DataControlFrameImpl.doFindDataControl(DataControlFrameImpl.java:1638)
at oracle.adf.model.dcframe.DataControlFrameImpl.internalFindDataControl(DataControlFrameImpl.java:1507)
at oracle.adf.model.dcframe.DataControlFrameImpl.findDataControl(DataControlFrameImpl.java:1467)
at oracle.adf.model.BindingContext.internalFindDataControl(BindingContext.java:1261)
at oracle.adf.model.BindingContext.get(BindingContext.java:1211)
at oracle.adf.model.binding.DCUtil.findSpelObject(DCUtil.java:304)
at oracle.adf.model.binding.DCBindingContainer.evaluateParameterWithElCheck(DCBindingContainer.java:1466)
at oracle.adf.model.binding.DCBindingContainer.evaluateParameter(DCBindingContainer.java:1511)
at oracle.jbo.uicli.binding.JUCtrlActionBinding.getResult(JUCtrlActionBinding.java:1968)
at oracle.adfinternal.view.faces.model.binding.FacesCtrlActionBinding._execute(FacesCtrlActionBinding.java:267)
at oracle.adfinternal.view.faces.model.binding.FacesCtrlActionBinding.execute(FacesCtrlActionBinding.java:210)
at com.euroscript.platon.reporting.view.ReportingBean.getListLanguages(ReportingBean.java:661)
at com.euroscript.platon.reporting.view.ReportingBean.getParamLabelsNeedingCustomLov(ReportingBean.java:87)
at com.euroscript.platon.reporting.view.ReportingBean.initParams(ReportingBean.java:151)
at com.euroscript.platon.reporting.view.ReportingBean.onSelectReport(ReportingBean.java:110)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.sun.el.parser.AstValue.invoke(AstValue.java:187)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:53)
at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodBinding(UIXComponentBase.java:1415)
at org.apache.myfaces.trinidad.component.UIXEditableValue.broadcast(UIXEditableValue.java:216)
at oracle.adf.view.rich.component.fragment.UIXRegion.broadcast(UIXRegion.java:181)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)
at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:103)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)
at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:97)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.broadcastEvents(LifecycleImpl.java:1086)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:478)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:207)
This methodAction calls a Data Contol based on a POJO which is using a JAX-WS Proxy. This Data Control POJO is packaged in a separate JAR file named ServicesProxy.jar.
Both ServicesProxy.jar and the ADF application using it are deployed as two distinct shared libraries used by webcenter portal application.
An important information is that the error does not happen when debugging the ADF application on my IntegratedServer. The error happens only when deployed as a shared Lib used by webcenter portal application.
This jar file ServicesProxy is used by other applications within our portal, so I think that the data control is properly created.
Do you have any idea what could be the cause of such error?

vinaykumar2 wrote:
not really.May be you can check log in EM to find out some warning or error.try that..
I have checked in the EM, I don't really find more helpful info...
Here is the full stacktrace found in the EM (WC_Spaces1-diagnostic.log)
dfd51:69a509b6:142a48c6891:-8000-0000000000000ffd,0] [APP: webcenter#11.1.1.4.0] [DSID: 0000KA^^HbLDc_l6wvicMG1IaBTa000009] ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase PROCESS_VALIDATIONS 3[[
javax.faces.el.EvaluationException: oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.lang.NullPointerException, msg=null
        at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:58)
        at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodBinding(UIXComponentBase.java:1415)
        at org.apache.myfaces.trinidad.component.UIXEditableValue.broadcast(UIXEditableValue.java:216)
        at oracle.adf.view.rich.component.fragment.UIXRegion.broadcast(UIXRegion.java:181)
        at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)
        at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)
        at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)
        at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:103)
        at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)
        at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)
        at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)
        at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:97)
        at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.broadcastEvents(LifecycleImpl.java:1086)
        at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:478)
        at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:207)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.portlet.client.adapter.adf.ADFPortletFilter.doFilter(ADFPortletFilter.java:32)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.webcenter.framework.events.dispatcher.EventDispatcherFilter.doFilter(EventDispatcherFilter.java:44)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.wcps.client.PersonalizationFilter.doFilter(PersonalizationFilter.java:74)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.webcenter.content.integration.servlets.ContentServletFilter.doFilter(ContentServletFilter.java:168)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.webcenter.generalsettings.model.provider.GeneralSettingsProviderFilter.doFilter(GeneralSettingsProviderFilter.java:85)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.webcenter.webcenterapp.internal.view.webapp.WebCenterShellPageRedirectionFilter.doFilter(WebCenterShellPageRedirectionFilter.java:342)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.webcenter.webcenterapp.internal.view.webapp.WebCenterShellFilter.doFilter(WebCenterShellFilter.java:953)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.adf.view.page.editor.webapp.WebCenterComposerFilter.doFilter(WebCenterComposerFilter.java:117)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.adf.share.http.ServletADFFilter.doFilter(ServletADFFilter.java:71)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:128)
        at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
        at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
        at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
        at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271)
        at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177)
        at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:180)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.webcenter.webcenterapp.internal.view.webapp.WebCenterLocaleWrapperFilter.processFilters(WebCenterLocaleWrapperFilter.java:369)
        at oracle.webcenter.webcenterapp.internal.view.webapp.WebCenterLocaleWrapperFilter.doFilter(WebCenterLocaleWrapperFilter.java:265)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.adfinternal.view.faces.caching.filter.AdfFacesCachingFilter.doFilter(AdfFacesCachingFilter.java:126)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
        at java.security.AccessController.doPrivileged(Native Method)
        at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:324)
        at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:460)
        at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
        at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
        at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:163)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
        at java.security.AccessController.doPrivileged(Native Method)
        at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:324)
        at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:460)
        at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
        at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
        at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3730)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3696)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2273)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2179)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Caused by: oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.lang.NullPointerException, msg=null
        at oracle.adf.model.binding.DCDataControlReference.getDataControl(DCDataControlReference.java:118)
        at oracle.adf.model.BindingContext.instantiateDataControl(BindingContext.java:1128)
        at oracle.adf.model.dcframe.DataControlFrameImpl.doFindDataControl(DataControlFrameImpl.java:1638)
        at oracle.adf.model.dcframe.DataControlFrameImpl.internalFindDataControl(DataControlFrameImpl.java:1507)
        at oracle.adf.model.dcframe.DataControlFrameImpl.findDataControl(DataControlFrameImpl.java:1467)
        at oracle.adf.model.BindingContext.internalFindDataControl(BindingContext.java:1261)
        at oracle.adf.model.BindingContext.get(BindingContext.java:1211)
        at oracle.adf.model.binding.DCUtil.findSpelObject(DCUtil.java:304)
        at oracle.adf.model.binding.DCBindingContainer.evaluateParameterWithElCheck(DCBindingContainer.java:1466)
        at oracle.adf.model.binding.DCBindingContainer.evaluateParameter(DCBindingContainer.java:1511)
        at oracle.jbo.uicli.binding.JUCtrlActionBinding.getResult(JUCtrlActionBinding.java:1968)
        at oracle.adfinternal.view.faces.model.binding.FacesCtrlActionBinding._execute(FacesCtrlActionBinding.java:267)
        at oracle.adfinternal.view.faces.model.binding.FacesCtrlActionBinding.execute(FacesCtrlActionBinding.java:210)
        at com.euroscript.platon.reporting.view.ReportingBean.getListLanguages(ReportingBean.java:463)
        at com.euroscript.platon.reporting.view.ReportingBean.getParamLabelsNeedingCustomLov(ReportingBean.java:87)
        at com.euroscript.platon.reporting.view.ReportingBean.initParams(ReportingBean.java:151)
        at com.euroscript.platon.reporting.view.ReportingBean.onSelectReport(ReportingBean.java:110)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.sun.el.parser.AstValue.invoke(AstValue.java:187)
        at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
        at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:53)
        ... 84 more
Caused by: java.lang.NullPointerException
        at oracle.adf.model.binding.DCDataControlReference.getDataControl(DCDataControlReference.java:113)
        ... 107 more
any suggestion???

"Shared Variable Control" combo box on Front Panel is empty after Build

Hello;
I have a project using shared variables and the DSC module. I am working on building a .exe application now that the project seems to run well.
I have several places on the front panel where I have shared variable controls. These combo boxes allow the user to click the drop down button and browse the list of shared variables in the project, as well as "browse". When I run the VI from the project, the combo boxes fully populate with all of the deployed tags in the project (I have only one .lvlib in the project).
When I build the project and run the executable, the only item in the combo box list is the "browse..." selection. I can click on that and browse to my variables, but it is much more time consuming to do so than to simply select the desired variable from the drop down list.
So, how can I populate the list of shared variables from a particular library ino the Shared Variable Control combo box in a project build?
A couple of things I have done to try to esolve th problem are ensure that the "Enable Enhanced DSC Run-Time Support" box is checked in the advanced tab of the build window, added the appropriate .lvlib file to the "Dynamic VI's and SUpport Files" window under the "Source Files" tab of the build window, and properly deployed the tag library programmatically in the project.
Thanks,
Michael Hampson
Michael Hampson
President
XL Automation, Inc.

Hi Michael,
What you see in the development environment is to make it easier for developers, and as far as I know, there's no way to automatically populate the shared variable control during run time in an executable. The reason being that the shared variable control would have no way to know which process it should be using to get the variables from. The attached vi demostrate how you can acquire the list of shared variables in a process. You can also set the default values of the shared variable control by right clicking it on the front pannel, go to Data Operations->Make Current Value Default. I can do some more research on this, but I'm about 95% sure that there's no way to convert the array of shared variables to populate the shared variable control, as the shared variable control is a special type of xControl.
Yi Y.
Applications Engineer
http://www.ni.com/support
Message Edited by Yi Y on 07-02-2007 01:27 AM
Attachments:
SharedVariableList.vi ‏15 KB

Using UCM data controls in ADF application

Using *.6 Jdeveloper/UCM/Protal Application/UCM
Calling all the experts in Webcenter/Spaces/UCM/ADF.
We have a requirement to design search inteface for Documents stored in UCM for Webcenter Portal and Spaces application.
Our approach is
Design simple ADF application (no security/templates)
Bounded task flows using fragments.
Framents to use UCM data controls (provided by oracle)
UCM data control definition is extended to use custom metadata.
package the application.
Added as ADF library jar to portal application
Added as Shared Library to Spaces application.
Question.
Is this approach sound?
Does UCM data controls provide all the functionality, for example if we want to read a option list for custom metadata or need custom metadata in return table?
Can we add other methods to UCM data control provided by Oracle or should we create different one?
Is there good documentation for such requirements. We have acces Webcenter developers guide which throws some light on UCM data controls.
Let me know if more clarity is needed...
Regards

Hi.
One of my last components was a custom "Document Explorer" and I used for first time JCR Data Control (Custom UCM Data Control provided by Oracle).
Sharing my experience I did something similar to you:
1) Create a ADF Bounded Task Flow and test it individually.
2) Add generated ADF JAR Library to WebCenter Spaces shared-lib.
3) Add your Task Flow to Resource Catalog.
Challenges that I found using custom Data Control:
1) When items retrieved are content/files all custom metadata can be retrieved OOTB.
2) When retrieving folders don't provide custom metadata like files. I used RIDC with JCR Data Control to provide all the information relative to folders. If you don't need more information about folders than the name, URI and icons then is OK :).
3) Using JCR Data Control registers in DataControls.dcx UCM Connection name used when generate JCR Data Control. After deploy your ADF JAR Library in WebCenter Spaces you'll have problems if you don't have a WebCenter Content Connection created with the same name. (Not talking about export UCM Connection with ADF JAR Library, Data Control uses a Connection name by itself :)).
I added extra functionallity with RIDC (not extending JCR Data Control).
I hope this help you.
Regards.

How to drag component from data control palette and drop in a line of text?

Hi,
I am using JDeveloper 10.1.3.4 and get frustrated with my attempt to drag a component from the data control palette and drop it in a line of text in a .jspx page. What I need to accomplish is to display a line of text to the use on a page:
Get clearance for the Spring 2009 semester.This is a line of static text except "Spring 2009" is the {color:green}Term{color} attribute of a view object dragged from the data control palette. I found that if I try to type some text on a page, as soon as I create a new line, a <f:verbatim> is created. So when I tryped the first part of the text, the code is:
<f:verbatim>

 Get clearance for the

</f:verbatim>Then drag-and-drop the bound data from the data control palette:
<f:verbatim>

 Get clearance for the
 <af:outputText value="#{bindings.Term.inputValue}"
 binding="#{backing_student_printOrQuit.outputText6}"
 id="outputText6"/>

</f:verbatim>And then add the last word:
<f:verbatim>

 Get clearance for the
 <af:outputText value="#{bindings.Term.inputValue}"
 binding="#{backing_student_printOrQuit.outputText6}"
 id="outputText6"/> term.

</f:verbatim>This looks OK in the Source tab. But in the Design tab the bound data jumps above the text line. Both the bound data and the <f:verbatim> appear to be block elements in the page. And so is it when the line is displayed in the browser:
Spring 2009
Get clearance for the term.How to overcome this problem?
Thanks for sharing your experience.
Newman

Shay,
Waht a surprise! Just now I had already finished typing the posting to tell that it did not work. I tried changing the original code to
<f:verbatim>

 Get clearance for the #{bindings.Term.inputValue} term.

</f:verbatim>and got the display:
Get clearance for the #{bindings.Term.inputValue} term.I tried various ways, putting single quotes around the whole expression in single quotes, around part of it, using square brackets, ... I was going to click the "Post Message" button, but gave it one last try:
<f:verbatim>

 Get clearance for the ${bindings.Term.inputValue} term.

</f:verbatim>and I got it! --
Get clearance for the Spring 2009 term.It was my gut feeling that I was quite close because the dot-separated hierarchy {color:green}bindings.Term.inputValue{color} looks right, only some tiny bit in syntax narrowly missing it. I was lucky.
Thank you for the suggestion!
Newman

Clear all rows in a Bean Data Control

I am using JDeveloper 11.1.1.6
In my use case I have a screen that interacts with a Bean Data Control I have followed the steps in the following URL to create a Bean Data Control
http://docs.oracle.com/cd/E18941_01/tutorials/jdtut_11r2_36/jdtut_11r2_36.html
My screen successfully interacts with the Bean Data Control. This screen lives in a Bounded Task Flow (BTF). I can add rows using a Create Insert binding and can delete Rows as well. Once the user gets all rows into the Bean Data Control that they want inserted to a DB table, I can iterate through the Bean Data Control and post those records to the DB. It is possible for the users to add rows to the Bean Data Control and then link to a brand new screen which is in a different BTF which leaves rows in the Bean Data Control. Now the user goes back to the original screen. Upon returning, I want to empty (clear all rows) for the Bean Data Control so that they have a fresh start. Could you please provide guidance on what I might need to do to be able to clear a Bean Data Control when entering a BTF

Hi,
You can create a method to clear your Bean Data Control and call it with an invokeAction with property refresh="ifNeeded" and refreshCondition="#{pageFlowScope.isTimeToClearAll}", so pageFlowScope.isTimeToClearAll must be true only when you need to clear the BDC.
Check this article: http://www.gebs.ro/blog/oracle/oracle-adf-invokeaction/
AP

Not able to drag new data control to my jsf

hi am not able to drag Queriable Attributes into the new query.jsf page and abl to Create it as a Query > ADF Query Panel.
this is what i have done
1.In the Application Navigator locate the adfc-config file under the Page Flows node in the ViewController project. Double-click it to open it in the editor. This is where you are going to define the application's navigation.
2.Drag the DeptEmpPage.jsf file from the Application Navigator into the empty adfc-config diagram.
3.From the Component Palette drag and drop a View component into the adf-config diagram, and rename it query. This represents the new JSF page that you are about to create.
4.From the Component Palette select Control Flow Case and then click on the DeptEmpPage and drag a line to the query page.
Name this line goQuery.
5.From the Component Palette choose another Control Flow Case and then create an opposite flow from the query page to the DeptEmpPage. Name this flow back.
6.Double-click the query view in the diagram to create the new page. In the Create JSF Page dialog accept the default Facelets radio button, and with the Quick Start Layout radio button selected, click Browse.
7.In the Component Gallery, retain the default One Column category, type and layout, but check the Apply Themes checkbox in the Options pane.
Click OK and OK again to create the page.
8.To add the employees search functionality to the page, open the Data Controls accordion, and locate EmpDetails1. (If you do not see it click the Refresh button).
am not able to Select All Queriable Attributes and drag it into the new query.jsf page. Create it as a Query > ADF Query Panel.
Edited by: user603350 on 2011/12/06 3:34 PM
Edited by: user603350 on 2011/12/06 3:39 PM

... and this solved the problem ?

I can not find (see) the Data Control Accordion

Hello all,
I cannot find (see) the Data Control Accordion, I just installed the Jdeveloper 11g (Oracle JDeveloper 11g (11.1.1.2.0) - November 2009) from this link http://www.oracle.com/technology/software/products/jdev/htdocs/soft11.html
I started a new ADF BC application, but I cannot find the data control accordion to drag and drop the components I created in the application model. Is there anything I must do after installation (post installation), is there any libraries need to be installed? Please, I need a help to create my application, I’m totally stuck, many thanks for any help.
Kind regards,
Nabil

Shay Shmeltzer wrote:
Can you post an image of your screen so we can see how it looks like?
If you delete the JDeveloper\system11.1.1.2.36.55.36 directory - does your IDE get back to the right way of displaying the data control?Hello,
Many thanks for your reply, kindly find attached screenshots for the two installation of Jdeveloper 11g I have (release 1 & 2), it shows clearly that the “Data Control” is available for release 1, but not available for release 2, even we are talking about the same application!
Regarding the “JDeveloper\system11.1.1.2.36.55.36”, I’m not sure if I have it (attached a list of directories installed), I was not able to find it under my installation directory, therefore I can’t answer your question, but please advise if it could be the reason, how I may have it, do you think there is something wrong with the installation? I noticed that some persons having the same problem before me, so what was wrong, and how they solve it? I appreciate any help please, many thanks.
Regards,
Nabil
P.S. regarding the attached files, sorry I don't know how to attach files to my reply (you may email me at [email protected] so I can send you the screenshots through email, if you please), any help regarding that too will be appreciated.
Directory     Location
o.adf-faces-query-and-lov-dt.11.1.1.2.36.55.36     E:\Oracle11MW\Middleware\jdeveloper\jdev\unit-tests\system11.0.0.0.0
o.adfdt.swingcore.11.1.1.2.36.55.36     E:\Oracle11MW\Middleware\jdeveloper\jdev\unit-tests\system11.0.0.0.0
o.adfm.11.1.1.2.36.55.36
o.adfm.11.1.1.2.36.55.36
o.BC4J.11.1.1.2.36.55.36
o.bm.11.1.1.2.36.55.36
o.css.11.1.1.2.36.55.36
o.diagram.javadoc.11.1.1.2.36.55.36
o.dynamic.faces.11.1.1.2.36.55.36
o.ide.11.1.1.2.36.55.36
o.j2ee.11.1.1.2.36.55.36
o.jdeveloper.11.1.1.2.36.55.36
o.jdeveloper.esdk.11.1.1.2.36.55.36
o.struts.11.1.1.2.36.55.36
o.struts.adf.11.1.1.2.36.55.36
o.xsqldt-ide.11.1.1.2.36.55.36

Not able to Control the Data Control

Hi, I have a bar chart which is bound to datacontrol through one iterator and one access iterator, and is placed on one splitter. Now on moving splitter and resizing the chart datacontrol re-fetches the data from the server. Why ? Cant it just re-size the chart without any connection with server. Also, i tried putting refreshCondition, and as it get calls two times everytime (one for JSF and another for ADF) and set refreshCondtion to false after second call. In that case i got no data. Also i tried refresh Ifneeded in both interators/accessIterator, still No Data. Is there any way i just execute data control only one time and henceforth can avoid its execution ?

Hi Shay,
PageDef Entries :
<accessorIterator MasterBinding="Query1Iterator" Binds="Query" RangeSize="-1" DataControl="Query1" BeanClass="testing.test.datacontrol.definition.Query1.Query" id="QueryIterator" *RefreshCondition="#{pageFlowScope.myEditor.refreshNeeded}"* xmlns="http://xmlns.oracle.com/adfm/uimodel"/>
<iterator Binds="root" DataControl="Query1" id="Query1Iterator" RangeSize="-1" xmlns="http://xmlns.oracle.com/adfm/uimodel"/>
<graph IterBinding="Query1Iterator" id="Query6" xmlns="http://xmlns.oracle.com/adfm/dvt" type="BAR_VERT_CLUST" ChangeEventPolicy="none">
This was the RefreshCondition i was talking about, but after putting this i am not getting any data. And removing this condition will invoke the datacontrol each time i move the splitter. I want to be it like when i order to refresh then only it should execute.
Everytime execution till the server unnecessary makes my application very slow, and i want to be as faster than we see charts in other technologies.
Any help would be appreciated.
Thanks-
Mangal

Shared Data Control

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