Grouper Users - Open Discussion List

["GW Brown, Information Systems and Computing" <>]

Hi Monica,

Responses below.

Gary

--On 22 September 2006 16:57 -0500 Monica Crawford <> 
wrote:

> 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.
It worked Ok in Tomcat.
> 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 noticed that from your source files.
> 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.
It definitely looks like some level of abstraction is being broken. I'd 
hoped the JSTL was making 'assumptions' about HashMaps, and that 
implementing the Map interface directly would get around this
> 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 :)?
Extending HashMap is a convenience, and I could rework it - but if the new 
ObjectAsMap doesn't work, I doubt changing MapBundleWrapper would work 
either.

I think the only way to crack this is to step through the code in a 
debugger to see exactly what is happening. JSTL really ought to call 'get' 
on the Map - and for Tomcat it appears to.

I'll have a go at downloading Weblogic or JBoss, but it may take me a few 
days to find the time.
> ERROR STACK WHEN REPLACING ObjectAsMap
>
> 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
> org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag
> .ja va:921) at
> org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:460) at
> org.apache.jsp.WEB_002dINF.jsp.template_jsp._jspx_meth_tiles_insert_2(org
> .ap ache.jsp.WEB_002dINF.jsp.template_jsp:417) at
> org.apache.jsp.WEB_002dINF.jsp.template_jsp._jspService(org.apache.jsp.WE
> B_0 02dINF.jsp.template_jsp:167) at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:810) at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.jav
> a:3 22) at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:810) at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applicat
> ion FilterChain.java:252) at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilte
> rCh ain.java:173) at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatch
> er. java:672) at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(Application
> Dis patcher.java:463) at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispa
> tch er.java:398) at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatc
> her .java:301) at
> org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java
> :10 56) at
> org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProce
> sso r.java:261) at
> org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(Tile
> sRe questProcessor.java:237) at
> org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesR
> equ estProcessor.java:300) at
> org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:2
> 31) at
I need to add some better error handling. Unfortunately the stack trace 
doesn't pin down where the actual NullPointerException originated.
> Smiles,
> Monica
> -----Original Message-----
> From: GW Brown, Information Systems and Computing
> [mailto:]
> Sent: Wednesday, September 20, 2006 11:37 AM
> To: Monica Crawford
> Cc: 
>
> Subject: Re: [grouper-users] Lists Returning but Not Rendering in UI
>
> Hi Monica,
>
> Would you try replacing
>   grouper-ui/java/src/edu/internet2/middleware/grouper/ui/util/ObjectAsMap
> 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?
>
> Thanks,
>
> Gary
>
>
> --On 15 September 2006 14:43 +0100 "GW Brown, Information Systems and
> Computing" 
> <>
>  wrote:
>
> > 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/examp
> > > le
> > > sServer/tmp/_WL_user/_appsdir_helloworld_war/q284bk/war/WEB-INF/lib/jst
> > > l1 .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
> > > > > populateDebugPrefs.do.  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



----------------------
GW Brown, Information Systems and Computing