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RE: [grouper-users] Lists Returning but Not Rendering in UI

Chronological Thread 
  • From: Monica Crawford <>
  • To: "'GW Brown, Information Systems and Computing'" <>
  • Cc:
  • Subject: RE: [grouper-users] Lists Returning but Not Rendering in UI
  • Date: Fri, 22 Sep 2006 16:57:25 -0500
  • Importance: Normal

Hi Gary,

I replaced ObjectAsMap with the attached and it didn't work in JBoss or
Weblogic I get an NPE in the browseStems.jsp. Did it work for you? See stack
below this message.

However, it does lead me to believe that is part of another core issue. In
addition to the OjbjectAsMap the MapBundleWrapper is also not returning
values when accessed via jstl.

I performed a few tests in Weblogic. Looks like the ${map['value']} works
fine if you are using a map that contains name/value pairs. But somehow,
the empty map of the MapBundleWraper isn't really working in the jstl
Weblogic. I even removed the jstl1.1.jar file from WEB-INF/lib to see if
there was another instance loaded from another classloader but it really
does need the jar file in web-inf.

I'm still investigating the issues, let me know if the ObjectAsMap works for
your environment. Also what are the chances of changing MapBundleWrapper to
not extend the HashMap either? It isn't necessarily being used as a true
'Map' but maybe there is another reason to have it extend HashMap beyond the
convenience of fooling clients into thinking it is a Map :)?


javax.servlet.jsp.JspException: ServletException in '/WEB-INF/jsp/body.jsp':
ServletException in '/WEB-INF/jsp/content.jsp': ServletException in
'/WEB-INF/jsp/MyGroups.jsp': ServletException in
'/WEB-INF/jsp/browseStems.jsp': null at
va:921) at
org.apache.struts.taglib.tiles.InsertTag.doEndTag( at
ache.jsp.WEB_002dINF.jsp.template_jsp:417) at
02dINF.jsp.template_jsp:167) at
org.apache.jasper.runtime.HttpJspBase.service( at
javax.servlet.http.HttpServlet.service( at
22) at
org.apache.jasper.servlet.JspServlet.serviceJspFile( at
org.apache.jasper.servlet.JspServlet.service( at
javax.servlet.http.HttpServlet.service( at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh at
java:672) at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDis at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatch at
.java:301) at
56) at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcesso at
org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRe at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequ at

-----Original Message-----
From: GW Brown, Information Systems and Computing

Sent: Wednesday, September 20, 2006 11:37 AM
To: Monica Crawford

Subject: Re: [grouper-users] Lists Returning but Not Rendering in UI

Hi Monica,

Would you try replacing
with the version attached, and rebuild.

I've re-implemented ObjectAsMap so that it doesn't extend HashMap. I expect
the changes will either fix the problem in Weblogic - or, possibly, make
them worse. If there is still a problem would you send me the equivalent
source files as before?



--On 15 September 2006 14:43 +0100 "GW Brown, Information Systems and

> Hi Monica,
> Thanks for sending the html. I'm not sure if I'm more, or less, confused
> than before, but here are some deductions/observations:
> 1) The Struts actions are creating objects as expected
> 2) The webapp loads the correct dynamic templates - which shows that the
> objects are working in the Java layer
> 3) Some JSTL is working. Looking at the 'Welcome' message we get
> <span class="applicationSubject"></span>. This indicates that:
> <c:out value="${viewObject.subjectType}"/> is working, but
> <c:out value="${viewObject.desc}" /> is not working.
> subjectType is a direct key in the Map, but desc maps to description,
> which, internally, calls Subject.getDescription() - which isn't
> returning a printable value. Ordinarily I would suspect that the
> description attribute had not been set, however, for GrouperSystem, it
> would be available, and, in any case, you see Subjects in Tomcat.
> In the case of Stems, <c:out value="${viewObject.displayExtension}"/> is
> failing to return a printable value. In this case, a WrapDynaBean is
> invoked to request 'displayExtension'. Unfortunately, if there is an
> exception I'm discarding it, but I'm suspicious that accessing Maps
> directly appears to work, but when the Maps try to invoke methods on the
> objects they wrap, this is failing - some sort of security layer?
> I'll try and come up with a test of some sort to to confirm the last
> supposition, but I won't get a chance to do that until next week.
> Gary
> --On 13 September 2006 18:07 -0500 Monica Crawford
> <>
> wrote:
>> Apologies for the delay, See inline and attached. Thanks.
>> GW Brown, Information Systems and Computing wrote:
>>> Hi Monica,
>>> Very strange!
>> Yes very. I'll try loading some simple lists using jstl under wl
>> (weblogic) as soon as possible.
>> Would you send me the HTML source of the screens? You can
>>> also include a search results page.
>>> If you create groups and add members using Tomcat, can you display
>>> memberships in Weblogic?
>> Well, I can't get to a membership page. After I create the group I can't
>> select it.
>> If you log on as a user from the LDAP
>>> directory, does the welcome message show their name? If you login as
>>> GrouperSystem does the welcome message show GrouperSystem?
>> Yes tomcat. No weblogic.
>>> The majority of objects that the UI deals with are Maps - usually
>>> subclasses of ObjectAsMap. It looks like the Maps are behaving
>>> differently between Tomcat and Weblogic, or that JSTL is treating them
>>> differently. Do you know if Weblogic uses the reference JSTL
>>> implementation or one of their own?
>> Weblogic has a jstl instance of its own (I'm thinking this is integrated
>> with jsp 2.0). However, it appears that having jstl in the webapp it will
>> load from WEB-INF lib.
>> I tested where javax.servlet.jsp.jstl.core.Config class is loaded on my
>> sample helloworld app... which has the same jstl jar as my modified
>> grouper app. Later, I will modify the grouper app to ensure the same
>> behavior but I'm pretty confident it would load in the same fashion; from
>> WEB-INF lib first.
>> file:/C:/tools/bea/weblogic92/samples/domains/wl_server/./servers/example
>> sServer/tmp/_WL_user/_appsdir_helloworld_war/q284bk/war/WEB-INF/lib/jstl1
>> .1.jar
>>> Gary
>>> --On 11 September 2006 18:41 -0500 Monica Crawford
>>> <>
>>> wrote:
>>>> Hi,
>>>> I have a few questions regarding the UI and the behavior I'm noticing.
>>>> I'm running 1.0 grouper-ui in Weblogic 9.2 and experience a couple
>>>> strange things. I've attached screen shots because there are no error
>>>> messages in the log files and I get an error with the
>>>> Now, this same behavior doesn't appear to
>>>> happen in my Tomcat instance with the same .war file.
>>>> * When searching for People (going against an ldap directory) it
>>>> reaches the directory server and returns results but they don't display
>>>> * When creating groups or stems the stems and groups get created in
>>>> the database, but don't display back on 'All Groups' 'Subject
>>>> Results'. But I see the name of the group and stem in the 'Add
>>>> Composite' section * When adding a group or stem I get 3 submit
>>>> buttons.
>>>> Thanks for the second set of eyes. Much appreciated.
>>>> Monica
>>> ----------------------
>>> GW Brown, Information Systems and Computing
>> --
>> Monica Crawford
>> University of Wisconsin-Madison
>> Division of Information Technology
>> 1210 West Dayton Street, Rm 3159
>> Madison, Wisconsin 53706
>> 608.890.0782
> ----------------------
> GW Brown, Information Systems and Computing

GW Brown, Information Systems and Computing

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