ADF dynamic region - Browser is blank

Question

Hi All,
I am following a hands-on practice in Oracle JDeveloper 11g Handbook. I have created two bounded task flows named "searchEmployee-flow.xml" and "departmentTee-flow.xml". I want to call these task flows from af:commandLink in a dynamic region. In the Choose Managed Bean for Dynamic Scope dialog I have provided following steps:
1. Click New (green “+”) to add a managed bean. Set Bean Name as “searchScreenBB,” Class Name as “SearchScreenBean,” and Package as “tuhra.view.backing.” Click OK. Click OK.
2. I wrote UIManager class to switch page fragments:
package tuhra.view;
public class UIManager implements Serializable
public enum Screen {EMPLOYEE_SEARCH, DEPARTMENT_TREE}
private Screen searchScreenFocus = Screen.EMPLOYEESEARCH;
public void setSearchScreenFocus(String focus) {
this._searchScreenFocus = Screen.valueOf(focus);
public void setSearchScreenFocus(UIManager.Screen focus){
this._searchScreenFocus = focus;
public UIManager.Screen getSearchScreenFocus() {
return _searchScreenFocus;
3.
I opened adfc-config (under Page Flows in the Application Navigator). On the Overview tab, selected Managed Beans and added a bean (using the green “+”) and fill in Name as “uiState,” Class as “tuhra.view.UIManager,” and Scope as “session.”
4.
Updated SearchScreenBean.java to read as in the following code listing (without the line numbers).
package tuhra.view.backing;
import java.util.HashMap;
import oracle.adf.controller.TaskFlowId;
import tuhra.view.UIManager;
public class SearchScreenBean {
private static final HashMap<UIManager.Screen,String> REGIONMAP;
static {
REGIONMAP = new HashMap<UIManager.Screen,String>(2);
REGIONMAP.put(UIManager.Screen.EMPLOYEE_SEARCH,
"/WEB-INF/searchEmployees-flow.xml#searchEmployees-flow");
REGIONMAP.put(UIManager.Screen.DEPARTMENT_TREE,
"/WEB-INF/departmentTree-flow.xml#departmentTree-flow");
private UIManager _uiManager;
public TaskFlowId getDynamicTaskFlowId(){
return TaskFlowId.parse(
REGIONMAP.get(_uiManager.getSearchScreenFocus()));
public void setUiManager(UIManager _uiManager){
this._uiManager = _uiManager;
6.
To have JSF inject the UI manager value, I switched back to the adfc-config.xml editor and locate the Managed Beans area on the Overview tab and performed folliwing steps as told in book:
6.1. Select the searchScreenBB bean and then click Add (green “+”) in the Managed Properties: searchScreenBB table. Set the managed property Name to “uiManager” (to match the setUiManager() method in the bean), the Class to tuhra.view.UIManager, and the Value to “#{uiState}.”
6.2. Now that the logic to switch the screens is in place, you can define how the UI will activate the change in searchScreenFocus values. You could of course use a custom method in SearchScreenBean, but using a af:setPropertyListener is simpler. In the employeeSearch.jspx file, locate the af:commandLink that surrounds the “Search for Employees” image.
6.3. Drop into the af:commandLink a Set Property Listener (Operations panel). Set From as “#{'EMPLOYEE_SEARCH'},” To as “#{uiState.searchScreenFocus},” and Type as “action.” Click OK.
6.4. Repeat the preceding step for the “View by Department” link. This time, fill in From as “#{'DEPARTMENT_TREE'}.”
6.5. Click Save All.
When I run the form as directed, It is blank and is giving following error messages:
[Application tuhra2 deployed to Server Instance IntegratedWebLogicServer]
Target URL -- http://127.0.0.1:7101/tuhra2/faces/employeeSearch.jspx
Caused by: oracle.adf.controller.ControllerException: ADFC-02001: The ADF Controller cannot find '/WEB-INF/searchEmployees-flow.xml'.
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getMetadataObjects(MdsMetadataResourceProvider.java:473)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.loadUnmutalbeMetadataResources(MdsMetadataResourceProvider.java:372)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getResources(MdsMetadataResourceProvider.java:183)
     at oracle.adf.controller.internal.metadata.MetadataService.getTaskFlowDefinition(MetadataService.java:239)
     at oracle.adfinternal.controller.activity.TaskFlowCallActivityLogic.findTaskFlowDefinition(TaskFlowCallActivityLogic.java:1072)
     at oracle.adfinternal.controller.activity.TaskFlowCallActivityLogic.invokeTaskFlow(TaskFlowCallActivityLogic.java:224)
     at oracle.adfinternal.controller.engine.ControlFlowEngine.invokeTaskFlow(ControlFlowEngine.java:217)
     ... 82 more
Caused by: oracle.mds.core.MetadataNotFoundException: MDS-00013: no metadata found for metadata object "/WEB-INF/searchEmployees-flow.xml"
     at oracle.mds.core.MetadataObject.getBaseMO(MetadataObject.java:1279)
     at oracle.mds.core.MDSSession.getBaseMO(MDSSession.java:3040)
     at oracle.mds.core.MDSSession.getMetadataObject(MDSSession.java:1211)
     at oracle.mds.core.MOResolver.getMetadataObjects(MOResolver.java:213)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getMetadataObjects(MdsMetadataResourceProvider.java:421)
     ... 88 more
<Jul 7, 2011 11:21:14 AM PKT> <Error> <HTTP> <BEA-101020> <[ServletContext@18426608[app:tuhra2 module:tuhra2 path:/tuhra2 spec-version:2.5]] Servlet failed with Exception
oracle.adf.controller.ControllerException: ADFC-06002: unhandled exception
     at oracle.adfinternal.controller.util.Utils.createAndLogControllerException(Utils.java:208)
     at oracle.adfinternal.controller.engine.ControlFlowEngine.handleException(ControlFlowEngine.java:640)
     at oracle.adfinternal.controller.engine.ControlFlowEngine.invokeTaskFlow(ControlFlowEngine.java:235)
     at oracle.adfinternal.controller.state.ChildViewPortContextImpl.invokeTaskFlow(ChildViewPortContextImpl.java:104)
     at oracle.adfinternal.controller.state.ControllerState.createChildViewPort(ControllerState.java:1380)
     Truncated. see log file for complete stacktrace
Caused By: oracle.adf.controller.ControllerException: ADFC-02001: The ADF Controller cannot find '/WEB-INF/searchEmployees-flow.xml'.
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getMetadataObjects(MdsMetadataResourceProvider.java:473)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.loadUnmutalbeMetadataResources(MdsMetadataResourceProvider.java:372)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getResources(MdsMetadataResourceProvider.java:183)
     at oracle.adf.controller.internal.metadata.MetadataService.getTaskFlowDefinition(MetadataService.java:239)
     at oracle.adfinternal.controller.activity.TaskFlowCallActivityLogic.findTaskFlowDefinition(TaskFlowCallActivityLogic.java:1072)
     Truncated. see log file for complete stacktrace
Caused By: oracle.mds.core.MetadataNotFoundException: MDS-00013: no metadata found for metadata object "/WEB-INF/searchEmployees-flow.xml"
     at oracle.mds.core.MetadataObject.getBaseMO(MetadataObject.java:1279)
     at oracle.mds.core.MDSSession.getBaseMO(MDSSession.java:3040)
     at oracle.mds.core.MDSSession.getMetadataObject(MDSSession.java:1211)
     at oracle.mds.core.MOResolver.getMetadataObjects(MOResolver.java:213)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getMetadataObjects(MdsMetadataResourceProvider.java:421)
     Truncated. see log file for complete stacktrace
>
<Jul 7, 2011 11:21:14 AM PKT> <Notice> <Diagnostics> <BEA-320068> <Watch 'UncheckedException' with severity 'Notice' on server 'DefaultServer' has triggered at Jul 7, 2011 11:21:14 AM PKT. Notification details:
WatchRuleType: Log
WatchRule: (SEVERITY = 'Error') AND ((MSGID = 'WL-101020') OR (MSGID = 'WL-101017') OR (MSGID = 'WL-000802') OR (MSGID = 'BEA-101020') OR (MSGID = 'BEA-101017') OR (MSGID = 'BEA-000802'))
WatchData: DATE = Jul 7, 2011 11:21:14 AM PKT SERVER = DefaultServer MESSAGE = [ServletContext@18426608[app:tuhra2 module:tuhra2 path:/tuhra2 spec-version:2.5]] Servlet failed with Exception
oracle.adf.controller.ControllerException: ADFC-06002: unhandled exception
     at oracle.adfinternal.controller.util.Utils.createAndLogControllerException(Utils.java:208)
     at oracle.adfinternal.controller.engine.ControlFlowEngine.handleException(ControlFlowEngine.java:640)
     at oracle.adfinternal.controller.engine.ControlFlowEngine.invokeTaskFlow(ControlFlowEngine.java:235)
     at oracle.adfinternal.controller.state.ChildViewPortContextImpl.invokeTaskFlow(ChildViewPortContextImpl.java:104)
     at oracle.adf.view.rich.component.fragment.UIXRegion$RegionContextChange.doChangeImpl(UIXRegion.java:1199)
     at jsp_servlet.__employeesearch_jspx._jspService(__employeesearch_jspx.java:65)
     at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
     at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:416)
     at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:253)
     at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:410)
     at com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:469)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:106)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
     at java.security.AccessController.doPrivileged(Native Method)
Caused By: oracle.adf.controller.ControllerException: ADFC-02001: The ADF Controller cannot find '/WEB-INF/searchEmployees-flow.xml'.
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getMetadataObjects(MdsMetadataResourceProvider.java:473)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.loadUnmutalbeMetadataResources(MdsMetadataResourceProvider.java:372)
     at oracle.adfinternal.controller.metadata.provider.MdsMetadataResourceProvider.getResources(MdsMetadataResourceProvider.java:183)
     at oracle.adf.controller.internal.metadata.MetadataService.getTaskFlowDefinition(MetadataService.java:239)
     at oracle.adfinternal.controller.activity.TaskFlowCallActivityLogic.findTaskFlowDefinition(TaskFlowCallActivityLogic.java:1072)
     at oracle.adfinternal.controller.activity.TaskFlowCallActivityLogic.invokeTaskFlow(TaskFlowCallActivityLogic.java:224)
     at oracle.adfinternal.controller.engine.ControlFlowEngine.invokeTaskFlow(ControlFlowEngine.java:217)
     at oracle.adfinternal.controller.state.ChildViewPortContextImpl.invokeTaskFlow(ChildViewPortContextImpl.java:104)
     at oracle.adfinternal.controller.state.ControllerState.createChildViewPort(ControllerState.java:1380)
     at oracle.adfinternal.controller.ControllerContextImpl.createChildViewPort(ControllerContextImpl.java:78)
     at oracle.adf.controller.internal.binding.DCTaskFlowBinding.createRegionViewPortContext(DCTaskFlowBinding.java:440)
     at oracle.adf.controller.internal.binding.DCTaskFlowBinding.getViewPort(DCTaskFlowBinding.java:358)
     at oracle.adf.controller.internal.binding.TaskFlowRegionModel.doProcessBeginRegion(TaskFlowRegionModel.java:164)
     at oracle.adf.controller.internal.binding.TaskFlowRegionModel.processBeginRegion(TaskFlowRegionModel.java:112)
     at oracle.adf.view.rich.component.fragment.UIXRegion$RegionContextChange.doChangeImpl(UIXRegion.java:1199)
     at oracle.adf.view.rich.context.DoableContextChange.doChange(DoableContextChange.java:91)
     at oracle.adf.view.rich.component.fragment.UIXRegion._beginInterruptibleRegion(UIXRegion.java:693)
     at oracle.adf.view.rich.component.fragment.UIXRegion.processRegion(UIXRegion.java:498)
     at oracle.adfinternal.view.faces.taglib.region.RegionTag.doStartTag(RegionTag.java:127)
     at jsp_servlet.__employeesearch_jspx._jspx___tag21(__employeesearch_jspx.java:1036)
     at jsp_servlet.__employeesearch_jspx._jspService(__employeesearch_jspx.java:65)
     at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
     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:300)
     at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:416)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:326)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:183)
SUBSYSTEM = HTTP USERID = <WLS Kernel> SEVERITY = Error THREAD = [ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)' MSGID = BEA-101020 MACHINE = bilal-PC TXID = CONTEXTID = d87127fb8baddada:4155b820:130fd94af8a:-8000-00000000000006c4 TIMESTAMP = 1310019674635
WatchAlarmType: AutomaticReset
WatchAlarmResetPeriod: 30000
>
<Jul 7, 2011 11:21:20 AM PKT> <Alert> <Diagnostics> <BEA-320016> <Creating diagnostic image in c:\users\administrator\appdata\roaming\jdeveloper\system11.1.1.5.37.60.13\defaultdomain\servers\defaultserver\adr\diag\ofm\defaultdomain\defaultserver\incident\incdir_16 with a lockout minute period of 1.>
Any help will be highly appreciated.
Thanks

Answer 1

Hi
This error occurs on account of the scope of backing bean Taskflow id not set up correctly and taskflow id leads to null pointer exception.
Open EmplloyeeSearch.jspx - go to bindings. click taskflow - dynamic region in binding. Set the property as follows:
#{backingBeanScope.searchScreenBB.dynamicTaskFlowId}
This should resolve the issue.
Edited by: Krithivasan N on Mar 6, 2012 11:52 AM