You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cayenne.apache.org by Robert Zeigler <ro...@puregumption.com> on 2006/06/27 00:54:15 UTC
various exceptions with cayenne 1.2RC2
Hi all,
Way back when 1.2B1 was released, I reported a weird fault resolving
exception. I didn't have time then to look into it further. I just tried
out cayenne 1.2RC2 and am still seeing the same weird behavior (maybe
I'm doing something weird. ;). I do have time now to look into it
further, but am getting stuck before I can get started by a separate issue.
My code:
public List getTransactionsForCourse(Course course) {
List ret = this.getAssignmentTransactions();
ret =
ExpressionFactory.matchExp("assignment.course.name",course.getName()).filterObjects(ret);
List orderings = new ArrayList();
orderings.add(new Ordering("assignment.name",true));
orderings.add(new Ordering("scoreAsFloat",false));
Ordering.orderList(ret,orderings);
return ret;
}
assignmentTransactions is a one to many relationship.
Calling said code is resulting in the following exception:
* org.objectstyle.cayenne.property.AbstractCollectionProperty.ensureCollectionValueHolderSet(AbstractCollectionProperty.java:159)
* org.objectstyle.cayenne.property.AbstractCollectionProperty.injectValueHolder(AbstractCollectionProperty.java:142)
* org.objectstyle.cayenne.property.BaseClassDescriptor.injectValueHolders(BaseClassDescriptor.java:218)
* org.objectstyle.cayenne.access.DataContext.localObject(DataContext.java:1924)
* org.objectstyle.cayenne.access.ObjectResolver.objectFromDataRow(ObjectResolver.java:237)
* org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows(ObjectResolver.java:155)
* org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFromDataRows(ObjectResolver.java:134)
* org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:373)
* org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:151)
* org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:766)
* org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:253)
* org.objectstyle.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:90)
* org.objectstyle.cayenne.access.DataContext.onQuery(DataContext.java:1422)
* org.objectstyle.cayenne.access.DataContext.performQuery(DataContext.java:1411)
* org.objectstyle.cayenne.access.ToManyList.resolvedObjectList(ToManyList.java:343)
* org.objectstyle.cayenne.access.ToManyList.size(ToManyList.java:296)
* org.objectstyle.cayenne.exp.Expression.filterObjects(Expression.java:458)
* org.eledge.domain.User.getTransactionsForCourse(User.java:92)
* org.eledge.domain.User.getGradebookGradedResponses(User.java:197)
* org.eledge.domain.User.getGradedGradebookGradedResponses(User.java:192)
* org.eledge.domain.User.getHasGradedGradebookGradedResponses(User.java:188)
* sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
* sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
* sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
* java.lang.reflect.Method.invoke(Method.java:585)
* ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
* ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:785)
* ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:61)
* ognl.OgnlRuntime.callMethod(OgnlRuntime.java:819)
* ognl.ASTMethod.getValueBody(ASTMethod.java:75)
* ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
* ognl.SimpleNode.getValue(SimpleNode.java:210)
* ognl.ASTChain.getValueBody(ASTChain.java:109)
* ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
* ognl.SimpleNode.getValue(SimpleNode.java:210)
* ognl.Ognl.getValue(Ognl.java:333)
* ognl.Ognl.getValue(Ognl.java:310)
* org.apache.tapestry.binding.ExpressionBinding.resolveProperty(ExpressionBinding.java:201)
* org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:194)
* org.apache.tapestry.binding.AbstractBinding.getBoolean(AbstractBinding.java:77)
* org.apache.tapestry.param.BooleanParameterConnector.setParameter(BooleanParameterConnector.java:51)
* org.apache.tapestry.param.ParameterManager.setParameters(ParameterManager.java:105)
* org.apache.tapestry.AbstractComponent.prepareForRender(AbstractComponent.java:898)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:853)
* org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
* org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
* org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
* org.apache.tapestry.html.Body.renderComponent(Body.java:269)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
* org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
* org.apache.tapestry.html.Shell.renderComponent(Shell.java:124)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
* org.mb.tapestry.base.IfBean.renderComponent(IfBean.java:83)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
* org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:300)
* org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:368)
* org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:749)
* org.apache.tapestry.engine.PageService.service(PageService.java:77)
* org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:889)
* org.eledge.EledgeEngine.service(EledgeEngine.java:60)
* org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
* org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
* javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
* javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
* org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
* org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
* org.eledge.OldEledgePagesFilter.doFilter(OldEledgePagesFilter.java:64)
* org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
* org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
* org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
* org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
* org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
* org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
* org.mortbay.http.HttpServer.service(HttpServer.java:909)
* org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
* org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
* org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
* org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
* org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
* org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
This is a tapestry (3.0.3) webapp, running with the JettyLauncher. I've
done a clean recompile, but no good. I dug into the code, and it looks
like ensureCollectionValueHolderSet is trying to cast an ArrayList as a
ValueHolder. In poking around, I saw a place where if something was
transient, an ArrayList was returned... but I can't find it again at the
moment; I'll look later tonight when I have a bit of time and see if I
can find it again. Anyway... thoughts? Cayenne bug? Something I've
screwed up?
Robert
Re: various exceptions with cayenne 1.2RC2
Posted by Robert Zeigler <ro...@puregumption.com>.
Andrus Adamchik wrote:
>
> On Jun 28, 2006, at 3:46 PM, Robert Zeigler wrote:
>
>> Interesting. I've created a bug report and attached a reproducible test
>> case.
>
> Thanks!
>
>
> Actually no. See Craig Russell's recent posts on a similar topic here
> - the framework has to have a backdoor access to the persistent
> objects and it has to be distinct from the user access. BTW JPA spec
> provides support for explicitly defining such policy (setters vs.
> direct field access, no matter whether the field is private or not).
> Another example would be Java serialization mechanism.
>
Fair enough. But it still seems funny to me, in a way... probably
because I don't have much knowledge in the field-based persistence
stuff. Looks like it's time to do some reading. =) I think the thing
that gets me is that the private variable in question isn't supposed to
be persisted. Granted, it's being built from a persistent list, but it's
fundamentally separate from the internal list that cayenne is, in fact,
using to store information about the relationship. Using the same setup
described previously (X, Y, Z, and K; also the setup for the test code),
we have the following series of events:
List ylistfromx = xinstance.getY();//no exception
for(Iterator it = ylistfromx.iterator();it.hasNext();) {//no exception...
Y yinstance = (Y) it.next();//fine... no exception...
yinistance.getK();//fine; this wll /not/ use the private List k member
of Y.
}
List ylistfromz = zinstance.getY();
//no exception, because the private List k; field in the shared Y
instance isn't initialized.
for(Iterator it = ylistfromz.iterator();it.hasNext();) {
Y yinstance = (Y) it.next();//no exception.
yinstance.getK();//fine; won't use the private List k member of Y.
}
//now that the list of Y objects is initialized and faulted for both
objects, we can safely initialize and use the private variable.
for(Iterator it = ylistfromx.iterator();it.hasNext();) {
Y yinstance = (Y) it.next();//fine... no exception...
yinstance.initPrivateK();//fine.
}
System.out.println(zinstance.getY().size());//fine.
The above code will execute without exception. You could go on your
merry way, and cayenne wouldn't be confused about the non-persistent
local variable wiith the same name as the persistent relationship. It's
/only/ when the relationships aren't initialized, and you do something like:
/*forces cayenne to resolve the objectList stored in the toManyList
representing the y relationship; this involves examining the k
relationship inside of Y...*/
for(iterator it = xinstance.getY().iterator;it.hasNext();) {
Y y = (Y) it.next();
y.doSomethingThatInitializesPrivateK();
}
/*this is fine because it's using the already resolved list, in which
cayenne uses a ToManyList to hold the relationship, instead of the local
variable. We could even loop through and do getK() for all y's in
getY(), and cayenne would be perfectly happy.*/
xinstance.getY().size();
/*exception thrown because in resolving the list of Y's, the y
properties will be examined,
and now that private List k is not null, it will be used as the
relationship field, rather than a ToManyList. If the List is, eg, an
ArrayList, we'll get a class cast exception...*/
system.out.println(zinstance.getY().size());
It's the inconsistency that gets me. =)
Robert
Re: various exceptions with cayenne 1.2RC2
Posted by Andrus Adamchik <an...@objectstyle.org>.
On Jun 28, 2006, at 3:46 PM, Robert Zeigler wrote:
> Interesting. I've created a bug report and attached a reproducible
> test
> case.
Thanks!
> Obviously, it's a simple matter for me to change my variable name. =)
> But, given the situation:
> X has a public "property" getX(), and a private field "x", doesn't it
> seem reasonable that cayenne should be using getX(), rather than the
> private x?
Actually no. See Craig Russell's recent posts on a similar topic here
- the framework has to have a backdoor access to the persistent
objects and it has to be distinct from the user access. BTW JPA spec
provides support for explicitly defining such policy (setters vs.
direct field access, no matter whether the field is private or not).
Another example would be Java serialization mechanism.
> Otherwise, it seems, to me at least, that cayenne is
> violating the contract of the "private" modifier.
Andrus
Re: various exceptions with cayenne 1.2RC2
Posted by Robert Zeigler <ro...@puregumption.com>.
Interesting. I've created a bug report and attached a reproducible test
case.
Obviously, it's a simple matter for me to change my variable name. =)
But, given the situation:
X has a public "property" getX(), and a private field "x", doesn't it
seem reasonable that cayenne should be using getX(), rather than the
private x? Otherwise, it seems, to me at least, that cayenne is
violating the contract of the "private" modifier.
Robert
Andrus Adamchik wrote:
> I see. In 1.2 Cayenne supports field-based persistence (albeit only on
> the remote client at the moment). As we move forward, this may become
> the default way to store properties (especially in light of JPA spec
> compliance). So the runtime has to work with both DataObject and POJO
> classes. The problem seems to be in the attempt to combine both
> approaches for the same entity class. Probably we shouldn't be mixing
> them when compiling ClassDescriptors.
>
> I'd appreciate a bug report - with a reproducible test case, I'll take
> another look at how the ClassDescriptors are implemented.
>
> Andrus
>
>
> On Jun 28, 2006, at 2:07 PM, Robert Zeigler wrote:
>
>> Found the issue.
>> AssignmentTransaction has a one-to-many relationship named
>> "studentResponses". It also had a private variable:
>> private List studentResponses. In certain situations (described
>> momentarily), it appears that the field accessor class is "seeing" the
>> private variable instead of the relationship. When I changed the name of
>> the private variable, the problem disappeared. I was also able to
>> duplicate the issue in an entirely unrelated (and much simpler) data
>> map. This seems like a bug to me; seems like FieldAccessor shouldn't be
>> able to grab/use my private variables. :) If you want, I can open up a
>> jira issue and attach a really simple map and bit of code that will
>> illustrate the issue.
>>
>> In any event, here is the situation where the invalid access occurs:
>> X has a to-many relationship to Y. Z also has a to-many relationship
>> to Y.
>> Y has a to-many relationship named k, and also has a private List k;
>> declaration.
>> xinstance, zinstance , and yinstance are instances of X, Z and Y,
>> respectively, and xinstance and zinstance share a yinstance.
>> X loads its list of Y via xinstance.getY(). xinstance does some
>> processing that results in
>> k's initialization in the shared yinstance. zinstance now does
>> zinstance.getY() and attempts to perform some operation on the list
>> (size(), get(0), iterator(), etc... something that forces cayenne to
>> fault the toManyList). While processing the shared yinstance, cayenne
>> will choke with a ClassCastException because it will see the private
>> variable k (now initialized, eg, to an ArrayList) rather than the
>> relationship with the same name.
>>
>> Apologies if the explanation is a bit opaque... again... I'll work up a
>> trivial data map + code example that triggers the error.
>>
>> Robert
>>
>> Robert Zeigler wrote:
>>> Didn't get back to this last night, sorry. Ok, I sat down and wrote a
>>> quick test to call the same code, external of tapestry.
>>> The code outside of tapestry didn't result in a class cast exception.
>>> Instead, it resulted in an ExpressionException (unable to evaluate
>>> assignment.name). Turns out that the assignment object doesn't have a
>>> "name" property (it's "title"). The thing that seems odd here is that
>>> the code throws no exceptions with M5 (I suspect this has to do with
>>> removing BeanUtils as a dependency?).
>>>
>>> Anyway... the lack of a ClassCastException says that something weird
>>> must be happening in tapestry or my code somewhere. I'll keep looking.
>>> I don't define collection setters in the DO; neither my code nor
>>> tapestry should be initializing the relationship, but I'll keep digging
>>> to see what I can find.
>>>
>>> Robert
>>>
>>>
>>> Andrus Adamchik wrote:
>>>
>>>>> In poking around, I saw a place where if something was
>>>>> transient, an ArrayList was returned... but I can't find it again
>>>>> at the
>>>>> moment; I'll look later tonight when I have a bit of time and see
>>>>> if I
>>>>> can find it again.
>>>>>
>>>> Let us know if you find those - this shouldn't happen in DataObjects.
>>>> The code below looks clean, so the cause is somewhere else. Is it
>>>> possible that Tapestry or the user code initializes the relationship
>>>> list on its own? Do you define collection setters in your DO's
>>>> (Cayenne does not by default)?
>>>>
>>>> Andrus
>>>>
>>>>
>>>>
>>>> On Jun 27, 2006, at 2:54 AM, Robert Zeigler wrote:
>>>>
>>>>
>>>>> Hi all,
>>>>>
>>>>> Way back when 1.2B1 was released, I reported a weird fault resolving
>>>>> exception. I didn't have time then to look into it further. I just
>>>>> tried
>>>>> out cayenne 1.2RC2 and am still seeing the same weird behavior (maybe
>>>>> I'm doing something weird. ;). I do have time now to look into it
>>>>> further, but am getting stuck before I can get started by a separate
>>>>> issue.
>>>>>
>>>>> My code:
>>>>> public List getTransactionsForCourse(Course course) {
>>>>> List ret = this.getAssignmentTransactions();
>>>>> ret =
>>>>> ExpressionFactory.matchExp("assignment.course.name",course.getName()).filterObjects(ret);
>>>>>
>>>>>
>>>>> List orderings = new ArrayList();
>>>>> orderings.add(new Ordering("assignment.name",true));
>>>>> orderings.add(new Ordering("scoreAsFloat",false));
>>>>> Ordering.orderList(ret,orderings);
>>>>> return ret;
>>>>> }
>>>>>
>>>>> assignmentTransactions is a one to many relationship.
>>>>>
>>>>> Calling said code is resulting in the following exception:
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.property.AbstractCollectionProperty.ensureCollectionValueHolderSet(AbstractCollectionProperty.java:159)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.property.AbstractCollectionProperty.injectValueHolder(AbstractCollectionProperty.java:142)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.property.BaseClassDescriptor.injectValueHolders(BaseClassDescriptor.java:218)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataContext.localObject(DataContext.java:1924)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.ObjectResolver.objectFromDataRow(ObjectResolver.java:237)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows(ObjectResolver.java:155)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFromDataRows(ObjectResolver.java:134)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:373)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:151)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:766)
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:253)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:90)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataContext.onQuery(DataContext.java:1422)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.DataContext.performQuery(DataContext.java:1411)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.ToManyList.resolvedObjectList(ToManyList.java:343)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.objectstyle.cayenne.access.ToManyList.size(ToManyList.java:296)
>>>>> *
>>>>> org.objectstyle.cayenne.exp.Expression.filterObjects(Expression.java:458)
>>>>>
>>>>>
>>>>>
>>>>> * org.eledge.domain.User.getTransactionsForCourse(User.java:92)
>>>>> *
>>>>> org.eledge.domain.User.getGradebookGradedResponses(User.java:197)
>>>>> *
>>>>> org.eledge.domain.User.getGradedGradebookGradedResponses(User.java:192)
>>>>>
>>>>>
>>>>> *
>>>>> org.eledge.domain.User.getHasGradedGradebookGradedResponses(User.java:188)
>>>>>
>>>>>
>>>>>
>>>>> * sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>> *
>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>>
>>>>>
>>>>>
>>>>> * java.lang.reflect.Method.invoke(Method.java:585)
>>>>> * ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
>>>>> * ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:785)
>>>>> *
>>>>> ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:61)
>>>>> * ognl.OgnlRuntime.callMethod(OgnlRuntime.java:819)
>>>>> * ognl.ASTMethod.getValueBody(ASTMethod.java:75)
>>>>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>>>>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>>>>> * ognl.ASTChain.getValueBody(ASTChain.java:109)
>>>>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>>>>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>>>>> * ognl.Ognl.getValue(Ognl.java:333)
>>>>> * ognl.Ognl.getValue(Ognl.java:310)
>>>>> *
>>>>> org.apache.tapestry.binding.ExpressionBinding.resolveProperty(ExpressionBinding.java:201)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:194)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.binding.AbstractBinding.getBoolean(AbstractBinding.java:77)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.param.BooleanParameterConnector.setParameter(BooleanParameterConnector.java:51)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.param.ParameterManager.setParameters(ParameterManager.java:105)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.prepareForRender(AbstractComponent.java:898)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:853)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>>>
>>>>>
>>>>>
>>>>> * org.apache.tapestry.html.Body.renderComponent(Body.java:269)
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>>>
>>>>>
>>>>>
>>>>> * org.apache.tapestry.html.Shell.renderComponent(Shell.java:124)
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>>>
>>>>>
>>>>>
>>>>> * org.mb.tapestry.base.IfBean.renderComponent(IfBean.java:83)
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:300)
>>>>> *
>>>>> org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:368)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:749)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.engine.PageService.service(PageService.java:77)
>>>>> *
>>>>> org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:889)
>>>>>
>>>>>
>>>>>
>>>>> * org.eledge.EledgeEngine.service(EledgeEngine.java:60)
>>>>> *
>>>>> org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
>>>>>
>>>>>
>>>>>
>>>>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>>>>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>>>>> *
>>>>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
>>>>>
>>>>>
>>>>> *
>>>>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.eledge.OldEledgePagesFilter.doFilter(OldEledgePagesFilter.java:64)
>>>>>
>>>>>
>>>>> *
>>>>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
>>>>>
>>>>>
>>>>>
>>>>> *
>>>>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
>>>>>
>>>>>
>>>>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
>>>>> *
>>>>> org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
>>>>>
>>>>>
>>>>>
>>>>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
>>>>> * org.mortbay.http.HttpServer.service(HttpServer.java:909)
>>>>> *
>>>>> org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
>>>>> *
>>>>> org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
>>>>> * org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
>>>>> *
>>>>> org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
>>>>>
>>>>>
>>>>>
>>>>> * org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
>>>>> * org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
>>>>>
>>>>>
>>>>> This is a tapestry (3.0.3) webapp, running with the JettyLauncher.
>>>>> I've
>>>>> done a clean recompile, but no good. I dug into the code, and it
>>>>> looks
>>>>> like ensureCollectionValueHolderSet is trying to cast an ArrayList
>>>>> as a
>>>>> ValueHolder. In poking around, I saw a place where if something was
>>>>> transient, an ArrayList was returned... but I can't find it again
>>>>> at the
>>>>> moment; I'll look later tonight when I have a bit of time and see
>>>>> if I
>>>>> can find it again. Anyway... thoughts? Cayenne bug? Something I've
>>>>> screwed up?
>>>>>
>>>>> Robert
>>>>>
>>>>>
>>>
>>>
>>
>>
>
Re: various exceptions with cayenne 1.2RC2
Posted by Andrus Adamchik <an...@objectstyle.org>.
I see. In 1.2 Cayenne supports field-based persistence (albeit only
on the remote client at the moment). As we move forward, this may
become the default way to store properties (especially in light of
JPA spec compliance). So the runtime has to work with both DataObject
and POJO classes. The problem seems to be in the attempt to combine
both approaches for the same entity class. Probably we shouldn't be
mixing them when compiling ClassDescriptors.
I'd appreciate a bug report - with a reproducible test case, I'll
take another look at how the ClassDescriptors are implemented.
Andrus
On Jun 28, 2006, at 2:07 PM, Robert Zeigler wrote:
> Found the issue.
> AssignmentTransaction has a one-to-many relationship named
> "studentResponses". It also had a private variable:
> private List studentResponses. In certain situations (described
> momentarily), it appears that the field accessor class is "seeing" the
> private variable instead of the relationship. When I changed the
> name of
> the private variable, the problem disappeared. I was also able to
> duplicate the issue in an entirely unrelated (and much simpler) data
> map. This seems like a bug to me; seems like FieldAccessor
> shouldn't be
> able to grab/use my private variables. :) If you want, I can open up a
> jira issue and attach a really simple map and bit of code that will
> illustrate the issue.
>
> In any event, here is the situation where the invalid access occurs:
> X has a to-many relationship to Y. Z also has a to-many
> relationship to Y.
> Y has a to-many relationship named k, and also has a private List k;
> declaration.
> xinstance, zinstance , and yinstance are instances of X, Z and Y,
> respectively, and xinstance and zinstance share a yinstance.
> X loads its list of Y via xinstance.getY(). xinstance does some
> processing that results in
> k's initialization in the shared yinstance. zinstance now does
> zinstance.getY() and attempts to perform some operation on the list
> (size(), get(0), iterator(), etc... something that forces cayenne to
> fault the toManyList). While processing the shared yinstance, cayenne
> will choke with a ClassCastException because it will see the private
> variable k (now initialized, eg, to an ArrayList) rather than the
> relationship with the same name.
>
> Apologies if the explanation is a bit opaque... again... I'll work
> up a
> trivial data map + code example that triggers the error.
>
> Robert
>
> Robert Zeigler wrote:
>> Didn't get back to this last night, sorry. Ok, I sat down and wrote a
>> quick test to call the same code, external of tapestry.
>> The code outside of tapestry didn't result in a class cast exception.
>> Instead, it resulted in an ExpressionException (unable to evaluate
>> assignment.name). Turns out that the assignment object doesn't
>> have a
>> "name" property (it's "title"). The thing that seems odd here is that
>> the code throws no exceptions with M5 (I suspect this has to do with
>> removing BeanUtils as a dependency?).
>>
>> Anyway... the lack of a ClassCastException says that something weird
>> must be happening in tapestry or my code somewhere. I'll keep
>> looking.
>> I don't define collection setters in the DO; neither my code nor
>> tapestry should be initializing the relationship, but I'll keep
>> digging
>> to see what I can find.
>>
>> Robert
>>
>>
>> Andrus Adamchik wrote:
>>
>>>> In poking around, I saw a place where if something was
>>>> transient, an ArrayList was returned... but I can't find it
>>>> again at the
>>>> moment; I'll look later tonight when I have a bit of time and
>>>> see if I
>>>> can find it again.
>>>>
>>> Let us know if you find those - this shouldn't happen in
>>> DataObjects.
>>> The code below looks clean, so the cause is somewhere else. Is it
>>> possible that Tapestry or the user code initializes the relationship
>>> list on its own? Do you define collection setters in your DO's
>>> (Cayenne does not by default)?
>>>
>>> Andrus
>>>
>>>
>>>
>>> On Jun 27, 2006, at 2:54 AM, Robert Zeigler wrote:
>>>
>>>
>>>> Hi all,
>>>>
>>>> Way back when 1.2B1 was released, I reported a weird fault
>>>> resolving
>>>> exception. I didn't have time then to look into it further. I
>>>> just tried
>>>> out cayenne 1.2RC2 and am still seeing the same weird behavior
>>>> (maybe
>>>> I'm doing something weird. ;). I do have time now to look into it
>>>> further, but am getting stuck before I can get started by a
>>>> separate
>>>> issue.
>>>>
>>>> My code:
>>>> public List getTransactionsForCourse(Course course) {
>>>> List ret = this.getAssignmentTransactions();
>>>> ret =
>>>> ExpressionFactory.matchExp
>>>> ("assignment.course.name",course.getName()).filterObjects(ret);
>>>>
>>>> List orderings = new ArrayList();
>>>> orderings.add(new Ordering("assignment.name",true));
>>>> orderings.add(new Ordering("scoreAsFloat",false));
>>>> Ordering.orderList(ret,orderings);
>>>> return ret;
>>>> }
>>>>
>>>> assignmentTransactions is a one to many relationship.
>>>>
>>>> Calling said code is resulting in the following exception:
>>>>
>>>> *
>>>> org.objectstyle.cayenne.property.AbstractCollectionProperty.ensureC
>>>> ollectionValueHolderSet(AbstractCollectionProperty.java:159)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.property.AbstractCollectionProperty.injectV
>>>> alueHolder(AbstractCollectionProperty.java:142)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.property.BaseClassDescriptor.injectValueHol
>>>> ders(BaseClassDescriptor.java:218)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataContext.localObject
>>>> (DataContext.java:1924)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.ObjectResolver.objectFromDataRow
>>>> (ObjectResolver.java:237)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows
>>>> (ObjectResolver.java:155)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFr
>>>> omDataRows(ObjectResolver.java:134)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjec
>>>> tConversion(DataDomainQueryAction.java:373)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.execute
>>>> (DataDomainQueryAction.java:151)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataDomain.onQuery
>>>> (DataDomain.java:766)
>>>>
>>>> *
>>>> org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery
>>>> (ObjectContextQueryAction.java:253)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataContextQueryAction.execute
>>>> (DataContextQueryAction.java:90)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataContext.onQuery
>>>> (DataContext.java:1422)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.DataContext.performQuery
>>>> (DataContext.java:1411)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.ToManyList.resolvedObjectList
>>>> (ToManyList.java:343)
>>>>
>>>>
>>>> *
>>>> org.objectstyle.cayenne.access.ToManyList.size(ToManyList.java:296)
>>>> *
>>>> org.objectstyle.cayenne.exp.Expression.filterObjects
>>>> (Expression.java:458)
>>>>
>>>>
>>>> * org.eledge.domain.User.getTransactionsForCourse(User.java:92)
>>>> * org.eledge.domain.User.getGradebookGradedResponses
>>>> (User.java:197)
>>>> *
>>>> org.eledge.domain.User.getGradedGradebookGradedResponses
>>>> (User.java:192)
>>>>
>>>> *
>>>> org.eledge.domain.User.getHasGradedGradebookGradedResponses
>>>> (User.java:188)
>>>>
>>>>
>>>> * sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>> *
>>>> sun.reflect.NativeMethodAccessorImpl.invoke
>>>> (NativeMethodAccessorImpl.java:39)
>>>>
>>>>
>>>> *
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke
>>>> (DelegatingMethodAccessorImpl.java:25)
>>>>
>>>>
>>>> * java.lang.reflect.Method.invoke(Method.java:585)
>>>> * ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
>>>> * ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:785)
>>>> * ognl.ObjectMethodAccessor.callMethod
>>>> (ObjectMethodAccessor.java:61)
>>>> * ognl.OgnlRuntime.callMethod(OgnlRuntime.java:819)
>>>> * ognl.ASTMethod.getValueBody(ASTMethod.java:75)
>>>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>>>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>>>> * ognl.ASTChain.getValueBody(ASTChain.java:109)
>>>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>>>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>>>> * ognl.Ognl.getValue(Ognl.java:333)
>>>> * ognl.Ognl.getValue(Ognl.java:310)
>>>> *
>>>> org.apache.tapestry.binding.ExpressionBinding.resolveProperty
>>>> (ExpressionBinding.java:201)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.binding.ExpressionBinding.getObject
>>>> (ExpressionBinding.java:194)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.binding.AbstractBinding.getBoolean
>>>> (AbstractBinding.java:77)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.param.BooleanParameterConnector.setParameter
>>>> (BooleanParameterConnector.java:51)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.param.ParameterManager.setParameters
>>>> (ParameterManager.java:105)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.prepareForRender
>>>> (AbstractComponent.java:898)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:853)
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.renderBody
>>>> (AbstractComponent.java:624)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.components.RenderBody.renderComponent
>>>> (RenderBody.java:45)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.renderBody
>>>> (AbstractComponent.java:624)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.components.RenderBody.renderComponent
>>>> (RenderBody.java:45)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.renderBody
>>>> (AbstractComponent.java:624)
>>>>
>>>>
>>>> * org.apache.tapestry.html.Body.renderComponent(Body.java:269)
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.renderBody
>>>> (AbstractComponent.java:624)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.components.RenderBody.renderComponent
>>>> (RenderBody.java:45)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.renderBody
>>>> (AbstractComponent.java:624)
>>>>
>>>>
>>>> * org.apache.tapestry.html.Shell.renderComponent(Shell.java:
>>>> 124)
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.BaseComponent.renderComponent
>>>> (BaseComponent.java:118)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.BaseComponent.renderComponent
>>>> (BaseComponent.java:118)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.renderBody
>>>> (AbstractComponent.java:624)
>>>>
>>>>
>>>> * org.mb.tapestry.base.IfBean.renderComponent(IfBean.java:83)
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.BaseComponent.renderComponent
>>>> (BaseComponent.java:118)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> *
>>>> org.apache.tapestry.BaseComponent.renderComponent
>>>> (BaseComponent.java:118)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.AbstractComponent.render
>>>> (AbstractComponent.java:857)
>>>>
>>>> * org.apache.tapestry.AbstractPage.renderPage
>>>> (AbstractPage.java:300)
>>>> *
>>>> org.apache.tapestry.engine.RequestCycle.renderPage
>>>> (RequestCycle.java:368)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.engine.AbstractEngine.renderResponse
>>>> (AbstractEngine.java:749)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.engine.PageService.service(PageService.java:77)
>>>> *
>>>> org.apache.tapestry.engine.AbstractEngine.service
>>>> (AbstractEngine.java:889)
>>>>
>>>>
>>>> * org.eledge.EledgeEngine.service(EledgeEngine.java:60)
>>>> *
>>>> org.apache.tapestry.ApplicationServlet.doService
>>>> (ApplicationServlet.java:198)
>>>>
>>>>
>>>> *
>>>> org.apache.tapestry.ApplicationServlet.doGet
>>>> (ApplicationServlet.java:159)
>>>>
>>>>
>>>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>>>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>>>> *
>>>> org.mortbay.jetty.servlet.ServletHolder.handle
>>>> (ServletHolder.java:428)
>>>>
>>>> *
>>>> org.mortbay.jetty.servlet.WebApplicationHandler
>>>> $CachedChain.doFilter(WebApplicationHandler.java:830)
>>>>
>>>>
>>>> *
>>>> org.eledge.OldEledgePagesFilter.doFilter
>>>> (OldEledgePagesFilter.java:64)
>>>>
>>>> *
>>>> org.mortbay.jetty.servlet.WebApplicationHandler
>>>> $CachedChain.doFilter(WebApplicationHandler.java:821)
>>>>
>>>>
>>>> *
>>>> org.mortbay.jetty.servlet.WebApplicationHandler.dispatch
>>>> (WebApplicationHandler.java:471)
>>>>
>>>>
>>>> *
>>>> org.mortbay.jetty.servlet.ServletHandler.handle
>>>> (ServletHandler.java:568)
>>>>
>>>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
>>>> *
>>>> org.mortbay.jetty.servlet.WebApplicationContext.handle
>>>> (WebApplicationContext.java:633)
>>>>
>>>>
>>>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
>>>> * org.mortbay.http.HttpServer.service(HttpServer.java:909)
>>>> * org.mortbay.http.HttpConnection.service
>>>> (HttpConnection.java:816)
>>>> *
>>>> org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
>>>> * org.mortbay.http.HttpConnection.handle(HttpConnection.java:
>>>> 833)
>>>> *
>>>> org.mortbay.http.SocketListener.handleConnection
>>>> (SocketListener.java:244)
>>>>
>>>>
>>>> * org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:
>>>> 357)
>>>> * org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:
>>>> 534)
>>>>
>>>>
>>>> This is a tapestry (3.0.3) webapp, running with the
>>>> JettyLauncher. I've
>>>> done a clean recompile, but no good. I dug into the code, and it
>>>> looks
>>>> like ensureCollectionValueHolderSet is trying to cast an
>>>> ArrayList as a
>>>> ValueHolder. In poking around, I saw a place where if something
>>>> was
>>>> transient, an ArrayList was returned... but I can't find it
>>>> again at the
>>>> moment; I'll look later tonight when I have a bit of time and
>>>> see if I
>>>> can find it again. Anyway... thoughts? Cayenne bug? Something I've
>>>> screwed up?
>>>>
>>>> Robert
>>>>
>>>>
>>
>>
>
>
Re: various exceptions with cayenne 1.2RC2
Posted by Robert Zeigler <ro...@puregumption.com>.
Found the issue.
AssignmentTransaction has a one-to-many relationship named
"studentResponses". It also had a private variable:
private List studentResponses. In certain situations (described
momentarily), it appears that the field accessor class is "seeing" the
private variable instead of the relationship. When I changed the name of
the private variable, the problem disappeared. I was also able to
duplicate the issue in an entirely unrelated (and much simpler) data
map. This seems like a bug to me; seems like FieldAccessor shouldn't be
able to grab/use my private variables. :) If you want, I can open up a
jira issue and attach a really simple map and bit of code that will
illustrate the issue.
In any event, here is the situation where the invalid access occurs:
X has a to-many relationship to Y. Z also has a to-many relationship to Y.
Y has a to-many relationship named k, and also has a private List k;
declaration.
xinstance, zinstance , and yinstance are instances of X, Z and Y,
respectively, and xinstance and zinstance share a yinstance.
X loads its list of Y via xinstance.getY(). xinstance does some
processing that results in
k's initialization in the shared yinstance. zinstance now does
zinstance.getY() and attempts to perform some operation on the list
(size(), get(0), iterator(), etc... something that forces cayenne to
fault the toManyList). While processing the shared yinstance, cayenne
will choke with a ClassCastException because it will see the private
variable k (now initialized, eg, to an ArrayList) rather than the
relationship with the same name.
Apologies if the explanation is a bit opaque... again... I'll work up a
trivial data map + code example that triggers the error.
Robert
Robert Zeigler wrote:
> Didn't get back to this last night, sorry. Ok, I sat down and wrote a
> quick test to call the same code, external of tapestry.
> The code outside of tapestry didn't result in a class cast exception.
> Instead, it resulted in an ExpressionException (unable to evaluate
> assignment.name). Turns out that the assignment object doesn't have a
> "name" property (it's "title"). The thing that seems odd here is that
> the code throws no exceptions with M5 (I suspect this has to do with
> removing BeanUtils as a dependency?).
>
> Anyway... the lack of a ClassCastException says that something weird
> must be happening in tapestry or my code somewhere. I'll keep looking.
> I don't define collection setters in the DO; neither my code nor
> tapestry should be initializing the relationship, but I'll keep digging
> to see what I can find.
>
> Robert
>
>
> Andrus Adamchik wrote:
>
>>> In poking around, I saw a place where if something was
>>> transient, an ArrayList was returned... but I can't find it again at the
>>> moment; I'll look later tonight when I have a bit of time and see if I
>>> can find it again.
>>>
>> Let us know if you find those - this shouldn't happen in DataObjects.
>> The code below looks clean, so the cause is somewhere else. Is it
>> possible that Tapestry or the user code initializes the relationship
>> list on its own? Do you define collection setters in your DO's
>> (Cayenne does not by default)?
>>
>> Andrus
>>
>>
>>
>> On Jun 27, 2006, at 2:54 AM, Robert Zeigler wrote:
>>
>>
>>> Hi all,
>>>
>>> Way back when 1.2B1 was released, I reported a weird fault resolving
>>> exception. I didn't have time then to look into it further. I just tried
>>> out cayenne 1.2RC2 and am still seeing the same weird behavior (maybe
>>> I'm doing something weird. ;). I do have time now to look into it
>>> further, but am getting stuck before I can get started by a separate
>>> issue.
>>>
>>> My code:
>>> public List getTransactionsForCourse(Course course) {
>>> List ret = this.getAssignmentTransactions();
>>> ret =
>>> ExpressionFactory.matchExp("assignment.course.name",course.getName()).filterObjects(ret);
>>>
>>> List orderings = new ArrayList();
>>> orderings.add(new Ordering("assignment.name",true));
>>> orderings.add(new Ordering("scoreAsFloat",false));
>>> Ordering.orderList(ret,orderings);
>>> return ret;
>>> }
>>>
>>> assignmentTransactions is a one to many relationship.
>>>
>>> Calling said code is resulting in the following exception:
>>>
>>> *
>>> org.objectstyle.cayenne.property.AbstractCollectionProperty.ensureCollectionValueHolderSet(AbstractCollectionProperty.java:159)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.property.AbstractCollectionProperty.injectValueHolder(AbstractCollectionProperty.java:142)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.property.BaseClassDescriptor.injectValueHolders(BaseClassDescriptor.java:218)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataContext.localObject(DataContext.java:1924)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.ObjectResolver.objectFromDataRow(ObjectResolver.java:237)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows(ObjectResolver.java:155)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFromDataRows(ObjectResolver.java:134)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:373)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:151)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:766)
>>>
>>> *
>>> org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:253)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:90)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataContext.onQuery(DataContext.java:1422)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.DataContext.performQuery(DataContext.java:1411)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.ToManyList.resolvedObjectList(ToManyList.java:343)
>>>
>>>
>>> *
>>> org.objectstyle.cayenne.access.ToManyList.size(ToManyList.java:296)
>>> *
>>> org.objectstyle.cayenne.exp.Expression.filterObjects(Expression.java:458)
>>>
>>>
>>> * org.eledge.domain.User.getTransactionsForCourse(User.java:92)
>>> * org.eledge.domain.User.getGradebookGradedResponses(User.java:197)
>>> *
>>> org.eledge.domain.User.getGradedGradebookGradedResponses(User.java:192)
>>>
>>> *
>>> org.eledge.domain.User.getHasGradedGradebookGradedResponses(User.java:188)
>>>
>>>
>>> * sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> *
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>
>>>
>>> *
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>
>>>
>>> * java.lang.reflect.Method.invoke(Method.java:585)
>>> * ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
>>> * ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:785)
>>> * ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:61)
>>> * ognl.OgnlRuntime.callMethod(OgnlRuntime.java:819)
>>> * ognl.ASTMethod.getValueBody(ASTMethod.java:75)
>>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>>> * ognl.ASTChain.getValueBody(ASTChain.java:109)
>>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>>> * ognl.Ognl.getValue(Ognl.java:333)
>>> * ognl.Ognl.getValue(Ognl.java:310)
>>> *
>>> org.apache.tapestry.binding.ExpressionBinding.resolveProperty(ExpressionBinding.java:201)
>>>
>>>
>>> *
>>> org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:194)
>>>
>>>
>>> *
>>> org.apache.tapestry.binding.AbstractBinding.getBoolean(AbstractBinding.java:77)
>>>
>>>
>>> *
>>> org.apache.tapestry.param.BooleanParameterConnector.setParameter(BooleanParameterConnector.java:51)
>>>
>>>
>>> *
>>> org.apache.tapestry.param.ParameterManager.setParameters(ParameterManager.java:105)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.prepareForRender(AbstractComponent.java:898)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:853)
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>
>>>
>>> *
>>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>
>>>
>>> *
>>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>
>>>
>>> * org.apache.tapestry.html.Body.renderComponent(Body.java:269)
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>
>>>
>>> *
>>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>
>>>
>>> * org.apache.tapestry.html.Shell.renderComponent(Shell.java:124)
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>>
>>>
>>> * org.mb.tapestry.base.IfBean.renderComponent(IfBean.java:83)
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> *
>>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>>
>>>
>>> *
>>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>>
>>> * org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:300)
>>> *
>>> org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:368)
>>>
>>>
>>> *
>>> org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:749)
>>>
>>>
>>> *
>>> org.apache.tapestry.engine.PageService.service(PageService.java:77)
>>> *
>>> org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:889)
>>>
>>>
>>> * org.eledge.EledgeEngine.service(EledgeEngine.java:60)
>>> *
>>> org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
>>>
>>>
>>> *
>>> org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
>>>
>>>
>>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>>> *
>>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
>>>
>>> *
>>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
>>>
>>>
>>> *
>>> org.eledge.OldEledgePagesFilter.doFilter(OldEledgePagesFilter.java:64)
>>>
>>> *
>>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
>>>
>>>
>>> *
>>> org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
>>>
>>>
>>> *
>>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
>>>
>>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
>>> *
>>> org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
>>>
>>>
>>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
>>> * org.mortbay.http.HttpServer.service(HttpServer.java:909)
>>> * org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
>>> *
>>> org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
>>> * org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
>>> *
>>> org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
>>>
>>>
>>> * org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
>>> * org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
>>>
>>>
>>> This is a tapestry (3.0.3) webapp, running with the JettyLauncher. I've
>>> done a clean recompile, but no good. I dug into the code, and it looks
>>> like ensureCollectionValueHolderSet is trying to cast an ArrayList as a
>>> ValueHolder. In poking around, I saw a place where if something was
>>> transient, an ArrayList was returned... but I can't find it again at the
>>> moment; I'll look later tonight when I have a bit of time and see if I
>>> can find it again. Anyway... thoughts? Cayenne bug? Something I've
>>> screwed up?
>>>
>>> Robert
>>>
>>>
>
>
Re: various exceptions with cayenne 1.2RC2
Posted by Robert Zeigler <ro...@puregumption.com>.
Didn't get back to this last night, sorry. Ok, I sat down and wrote a
quick test to call the same code, external of tapestry.
The code outside of tapestry didn't result in a class cast exception.
Instead, it resulted in an ExpressionException (unable to evaluate
assignment.name). Turns out that the assignment object doesn't have a
"name" property (it's "title"). The thing that seems odd here is that
the code throws no exceptions with M5 (I suspect this has to do with
removing BeanUtils as a dependency?).
Anyway... the lack of a ClassCastException says that something weird
must be happening in tapestry or my code somewhere. I'll keep looking.
I don't define collection setters in the DO; neither my code nor
tapestry should be initializing the relationship, but I'll keep digging
to see what I can find.
Robert
Andrus Adamchik wrote:
>
>> In poking around, I saw a place where if something was
>> transient, an ArrayList was returned... but I can't find it again at the
>> moment; I'll look later tonight when I have a bit of time and see if I
>> can find it again.
>
> Let us know if you find those - this shouldn't happen in DataObjects.
> The code below looks clean, so the cause is somewhere else. Is it
> possible that Tapestry or the user code initializes the relationship
> list on its own? Do you define collection setters in your DO's
> (Cayenne does not by default)?
>
> Andrus
>
>
>
> On Jun 27, 2006, at 2:54 AM, Robert Zeigler wrote:
>
>> Hi all,
>>
>> Way back when 1.2B1 was released, I reported a weird fault resolving
>> exception. I didn't have time then to look into it further. I just tried
>> out cayenne 1.2RC2 and am still seeing the same weird behavior (maybe
>> I'm doing something weird. ;). I do have time now to look into it
>> further, but am getting stuck before I can get started by a separate
>> issue.
>>
>> My code:
>> public List getTransactionsForCourse(Course course) {
>> List ret = this.getAssignmentTransactions();
>> ret =
>> ExpressionFactory.matchExp("assignment.course.name",course.getName()).filterObjects(ret);
>>
>> List orderings = new ArrayList();
>> orderings.add(new Ordering("assignment.name",true));
>> orderings.add(new Ordering("scoreAsFloat",false));
>> Ordering.orderList(ret,orderings);
>> return ret;
>> }
>>
>> assignmentTransactions is a one to many relationship.
>>
>> Calling said code is resulting in the following exception:
>>
>> *
>> org.objectstyle.cayenne.property.AbstractCollectionProperty.ensureCollectionValueHolderSet(AbstractCollectionProperty.java:159)
>>
>>
>> *
>> org.objectstyle.cayenne.property.AbstractCollectionProperty.injectValueHolder(AbstractCollectionProperty.java:142)
>>
>>
>> *
>> org.objectstyle.cayenne.property.BaseClassDescriptor.injectValueHolders(BaseClassDescriptor.java:218)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataContext.localObject(DataContext.java:1924)
>>
>>
>> *
>> org.objectstyle.cayenne.access.ObjectResolver.objectFromDataRow(ObjectResolver.java:237)
>>
>>
>> *
>> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows(ObjectResolver.java:155)
>>
>>
>> *
>> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFromDataRows(ObjectResolver.java:134)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:373)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:151)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:766)
>>
>> *
>> org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:253)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:90)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataContext.onQuery(DataContext.java:1422)
>>
>>
>> *
>> org.objectstyle.cayenne.access.DataContext.performQuery(DataContext.java:1411)
>>
>>
>> *
>> org.objectstyle.cayenne.access.ToManyList.resolvedObjectList(ToManyList.java:343)
>>
>>
>> *
>> org.objectstyle.cayenne.access.ToManyList.size(ToManyList.java:296)
>> *
>> org.objectstyle.cayenne.exp.Expression.filterObjects(Expression.java:458)
>>
>>
>> * org.eledge.domain.User.getTransactionsForCourse(User.java:92)
>> * org.eledge.domain.User.getGradebookGradedResponses(User.java:197)
>> *
>> org.eledge.domain.User.getGradedGradebookGradedResponses(User.java:192)
>>
>> *
>> org.eledge.domain.User.getHasGradedGradebookGradedResponses(User.java:188)
>>
>>
>> * sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> *
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>>
>> *
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>>
>> * java.lang.reflect.Method.invoke(Method.java:585)
>> * ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
>> * ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:785)
>> * ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:61)
>> * ognl.OgnlRuntime.callMethod(OgnlRuntime.java:819)
>> * ognl.ASTMethod.getValueBody(ASTMethod.java:75)
>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>> * ognl.ASTChain.getValueBody(ASTChain.java:109)
>> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
>> * ognl.SimpleNode.getValue(SimpleNode.java:210)
>> * ognl.Ognl.getValue(Ognl.java:333)
>> * ognl.Ognl.getValue(Ognl.java:310)
>> *
>> org.apache.tapestry.binding.ExpressionBinding.resolveProperty(ExpressionBinding.java:201)
>>
>>
>> *
>> org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:194)
>>
>>
>> *
>> org.apache.tapestry.binding.AbstractBinding.getBoolean(AbstractBinding.java:77)
>>
>>
>> *
>> org.apache.tapestry.param.BooleanParameterConnector.setParameter(BooleanParameterConnector.java:51)
>>
>>
>> *
>> org.apache.tapestry.param.ParameterManager.setParameters(ParameterManager.java:105)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.prepareForRender(AbstractComponent.java:898)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:853)
>>
>> *
>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>
>>
>> *
>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>
>>
>> *
>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>
>>
>> * org.apache.tapestry.html.Body.renderComponent(Body.java:269)
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>
>>
>> *
>> org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:45)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>
>>
>> * org.apache.tapestry.html.Shell.renderComponent(Shell.java:124)
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:624)
>>
>>
>> * org.mb.tapestry.base.IfBean.renderComponent(IfBean.java:83)
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> *
>> org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:118)
>>
>>
>> *
>> org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:857)
>>
>> * org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:300)
>> *
>> org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:368)
>>
>>
>> *
>> org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:749)
>>
>>
>> *
>> org.apache.tapestry.engine.PageService.service(PageService.java:77)
>> *
>> org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:889)
>>
>>
>> * org.eledge.EledgeEngine.service(EledgeEngine.java:60)
>> *
>> org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
>>
>>
>> *
>> org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
>>
>>
>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>> * javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>> *
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
>>
>> *
>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
>>
>>
>> *
>> org.eledge.OldEledgePagesFilter.doFilter(OldEledgePagesFilter.java:64)
>>
>> *
>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
>>
>>
>> *
>> org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
>>
>>
>> *
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
>>
>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
>> *
>> org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
>>
>>
>> * org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
>> * org.mortbay.http.HttpServer.service(HttpServer.java:909)
>> * org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
>> *
>> org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
>> * org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
>> *
>> org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
>>
>>
>> * org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
>> * org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
>>
>>
>> This is a tapestry (3.0.3) webapp, running with the JettyLauncher. I've
>> done a clean recompile, but no good. I dug into the code, and it looks
>> like ensureCollectionValueHolderSet is trying to cast an ArrayList as a
>> ValueHolder. In poking around, I saw a place where if something was
>> transient, an ArrayList was returned... but I can't find it again at the
>> moment; I'll look later tonight when I have a bit of time and see if I
>> can find it again. Anyway... thoughts? Cayenne bug? Something I've
>> screwed up?
>>
>> Robert
>>
>
Re: various exceptions with cayenne 1.2RC2
Posted by Andrus Adamchik <an...@objectstyle.org>.
> In poking around, I saw a place where if something was
> transient, an ArrayList was returned... but I can't find it again
> at the
> moment; I'll look later tonight when I have a bit of time and see if I
> can find it again.
Let us know if you find those - this shouldn't happen in DataObjects.
The code below looks clean, so the cause is somewhere else. Is it
possible that Tapestry or the user code initializes the relationship
list on its own? Do you define collection setters in your DO's
(Cayenne does not by default)?
Andrus
On Jun 27, 2006, at 2:54 AM, Robert Zeigler wrote:
> Hi all,
>
> Way back when 1.2B1 was released, I reported a weird fault resolving
> exception. I didn't have time then to look into it further. I just
> tried
> out cayenne 1.2RC2 and am still seeing the same weird behavior (maybe
> I'm doing something weird. ;). I do have time now to look into it
> further, but am getting stuck before I can get started by a
> separate issue.
>
> My code:
> public List getTransactionsForCourse(Course course) {
> List ret = this.getAssignmentTransactions();
> ret =
> ExpressionFactory.matchExp("assignment.course.name",course.getName
> ()).filterObjects(ret);
> List orderings = new ArrayList();
> orderings.add(new Ordering("assignment.name",true));
> orderings.add(new Ordering("scoreAsFloat",false));
> Ordering.orderList(ret,orderings);
> return ret;
> }
>
> assignmentTransactions is a one to many relationship.
>
> Calling said code is resulting in the following exception:
>
> *
> org.objectstyle.cayenne.property.AbstractCollectionProperty.ensureColl
> ectionValueHolderSet(AbstractCollectionProperty.java:159)
>
> *
> org.objectstyle.cayenne.property.AbstractCollectionProperty.injectValu
> eHolder(AbstractCollectionProperty.java:142)
>
> *
> org.objectstyle.cayenne.property.BaseClassDescriptor.injectValueHolder
> s(BaseClassDescriptor.java:218)
>
> * org.objectstyle.cayenne.access.DataContext.localObject
> (DataContext.java:1924)
>
> *
> org.objectstyle.cayenne.access.ObjectResolver.objectFromDataRow
> (ObjectResolver.java:237)
>
> *
> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows
> (ObjectResolver.java:155)
>
> *
> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFromD
> ataRows(ObjectResolver.java:134)
>
> *
> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectCo
> nversion(DataDomainQueryAction.java:373)
>
> * org.objectstyle.cayenne.access.DataDomainQueryAction.execute
> (DataDomainQueryAction.java:151)
>
> * org.objectstyle.cayenne.access.DataDomain.onQuery
> (DataDomain.java:766)
>
> * org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery
> (ObjectContextQueryAction.java:253)
>
> * org.objectstyle.cayenne.access.DataContextQueryAction.execute
> (DataContextQueryAction.java:90)
>
> * org.objectstyle.cayenne.access.DataContext.onQuery
> (DataContext.java:1422)
>
> * org.objectstyle.cayenne.access.DataContext.performQuery
> (DataContext.java:1411)
>
> * org.objectstyle.cayenne.access.ToManyList.resolvedObjectList
> (ToManyList.java:343)
>
> * org.objectstyle.cayenne.access.ToManyList.size
> (ToManyList.java:296)
> * org.objectstyle.cayenne.exp.Expression.filterObjects
> (Expression.java:458)
>
> * org.eledge.domain.User.getTransactionsForCourse(User.java:92)
> * org.eledge.domain.User.getGradebookGradedResponses(User.java:
> 197)
> * org.eledge.domain.User.getGradedGradebookGradedResponses
> (User.java:192)
>
> * org.eledge.domain.User.getHasGradedGradebookGradedResponses
> (User.java:188)
>
> * sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> * sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:39)
>
> * sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:25)
>
> * java.lang.reflect.Method.invoke(Method.java:585)
> * ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
> * ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:785)
> * ognl.ObjectMethodAccessor.callMethod
> (ObjectMethodAccessor.java:61)
> * ognl.OgnlRuntime.callMethod(OgnlRuntime.java:819)
> * ognl.ASTMethod.getValueBody(ASTMethod.java:75)
> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
> * ognl.SimpleNode.getValue(SimpleNode.java:210)
> * ognl.ASTChain.getValueBody(ASTChain.java:109)
> * ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
> * ognl.SimpleNode.getValue(SimpleNode.java:210)
> * ognl.Ognl.getValue(Ognl.java:333)
> * ognl.Ognl.getValue(Ognl.java:310)
> * org.apache.tapestry.binding.ExpressionBinding.resolveProperty
> (ExpressionBinding.java:201)
>
> * org.apache.tapestry.binding.ExpressionBinding.getObject
> (ExpressionBinding.java:194)
>
> * org.apache.tapestry.binding.AbstractBinding.getBoolean
> (AbstractBinding.java:77)
>
> *
> org.apache.tapestry.param.BooleanParameterConnector.setParameter
> (BooleanParameterConnector.java:51)
>
> * org.apache.tapestry.param.ParameterManager.setParameters
> (ParameterManager.java:105)
>
> * org.apache.tapestry.AbstractComponent.prepareForRender
> (AbstractComponent.java:898)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:853)
>
> * org.apache.tapestry.AbstractComponent.renderBody
> (AbstractComponent.java:624)
>
> * org.apache.tapestry.components.RenderBody.renderComponent
> (RenderBody.java:45)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.AbstractComponent.renderBody
> (AbstractComponent.java:624)
>
> * org.apache.tapestry.components.RenderBody.renderComponent
> (RenderBody.java:45)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.AbstractComponent.renderBody
> (AbstractComponent.java:624)
>
> * org.apache.tapestry.html.Body.renderComponent(Body.java:269)
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.AbstractComponent.renderBody
> (AbstractComponent.java:624)
>
> * org.apache.tapestry.components.RenderBody.renderComponent
> (RenderBody.java:45)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.AbstractComponent.renderBody
> (AbstractComponent.java:624)
>
> * org.apache.tapestry.html.Shell.renderComponent(Shell.java:124)
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.BaseComponent.renderComponent
> (BaseComponent.java:118)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.BaseComponent.renderComponent
> (BaseComponent.java:118)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.AbstractComponent.renderBody
> (AbstractComponent.java:624)
>
> * org.mb.tapestry.base.IfBean.renderComponent(IfBean.java:83)
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.BaseComponent.renderComponent
> (BaseComponent.java:118)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.BaseComponent.renderComponent
> (BaseComponent.java:118)
>
> * org.apache.tapestry.AbstractComponent.render
> (AbstractComponent.java:857)
>
> * org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:
> 300)
> * org.apache.tapestry.engine.RequestCycle.renderPage
> (RequestCycle.java:368)
>
> * org.apache.tapestry.engine.AbstractEngine.renderResponse
> (AbstractEngine.java:749)
>
> * org.apache.tapestry.engine.PageService.service
> (PageService.java:77)
> * org.apache.tapestry.engine.AbstractEngine.service
> (AbstractEngine.java:889)
>
> * org.eledge.EledgeEngine.service(EledgeEngine.java:60)
> * org.apache.tapestry.ApplicationServlet.doService
> (ApplicationServlet.java:198)
>
> * org.apache.tapestry.ApplicationServlet.doGet
> (ApplicationServlet.java:159)
>
> * javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
> * javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> * org.mortbay.jetty.servlet.ServletHolder.handle
> (ServletHolder.java:428)
>
> * org.mortbay.jetty.servlet.WebApplicationHandler
> $CachedChain.doFilter(WebApplicationHandler.java:830)
>
> * org.eledge.OldEledgePagesFilter.doFilter
> (OldEledgePagesFilter.java:64)
>
> * org.mortbay.jetty.servlet.WebApplicationHandler
> $CachedChain.doFilter(WebApplicationHandler.java:821)
>
> * org.mortbay.jetty.servlet.WebApplicationHandler.dispatch
> (WebApplicationHandler.java:471)
>
> * org.mortbay.jetty.servlet.ServletHandler.handle
> (ServletHandler.java:568)
>
> * org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
> * org.mortbay.jetty.servlet.WebApplicationContext.handle
> (WebApplicationContext.java:633)
>
> * org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
> * org.mortbay.http.HttpServer.service(HttpServer.java:909)
> * org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
> * org.mortbay.http.HttpConnection.handleNext
> (HttpConnection.java:982)
> * org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
> * org.mortbay.http.SocketListener.handleConnection
> (SocketListener.java:244)
>
> * org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
> * org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
>
>
> This is a tapestry (3.0.3) webapp, running with the JettyLauncher.
> I've
> done a clean recompile, but no good. I dug into the code, and it looks
> like ensureCollectionValueHolderSet is trying to cast an ArrayList
> as a
> ValueHolder. In poking around, I saw a place where if something was
> transient, an ArrayList was returned... but I can't find it again
> at the
> moment; I'll look later tonight when I have a bit of time and see if I
> can find it again. Anyway... thoughts? Cayenne bug? Something I've
> screwed up?
>
> Robert
>