Is there a way I can throw some error from jxpath when this situation
arises instead of getting stuck in a never ending loop?
On Sun, 24 Sep, 2023, 22:54 Matt Benson, <gudnabr...@gmail.com> wrote:
> Well, to be clear, you can have linked nodes. But if N had both `next` and
> `previous` members is where you'd run into trouble.
>
> On Sun, Sep 24, 2023 at 12:22 PM Matt Benson <gudnabr...@gmail.com> wrote:
>
> > If you're doing a search down the tree you'd need some way to keep JXPath
> > from traversing these relationships, yes.
> >
> > On Sun, Sep 24, 2023 at 11:59 AM Debraj Manna <subharaj.ma...@gmail.com>
> > wrote:
> >
> >> Are you saying that in JxPath we cannot use something like below?
> >>
> >> class A {
> >> int n;
> >> A next;
> >> }
> >>
> >> On Sun, Sep 24, 2023 at 8:43 PM Matt Benson <mben...@apache.org> wrote:
> >>
> >> > Is it possible the proto message (I'm not familiar with this API) is
> >> built
> >> > with internal recursive references, i.e. some child has a property
> that
> >> > points, possibly indirectly, to its parent? That would be the most
> >> probable
> >> > explanation, particularly as you say feeding jxpath the known absolute
> >> path
> >> > works.
> >> >
> >> > Matt
> >> >
> >> > On Sun, Sep 24, 2023, 9:44 AM Debraj Manna <subharaj.ma...@gmail.com>
> >> > wrote:
> >> >
> >> > > It looks like it is getting stuck in some infinite loop. The thread
> >> stack
> >> > > looks like below after ~ 8 hours from the start.
> >> > >
> >> > > main Runnable CPU usage on sample: 979ms
> >> > > jdk.internal.reflect.GeneratedMethodAccessor640.invoke()
> >> > >
> >> > >
> >> > >
> >> >
> >>
> jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> >> > > java.lang.reflect.Method.invoke(Method.java:568)
> >> > >
> >> org.apache.commons.jxpath.util.ValueUtils.getValue(ValueUtils.java:367)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.model.beans.BeanPropertyPointer.getBaseValue(BeanPropertyPointer.java:120)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.model.beans.BeanPropertyPointer.getImmediateNode(BeanPropertyPointer.java:149)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.model.beans.PropertyPointer.getImmediateValuePointer(PropertyPointer.java:161)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.model.NodePointer.getValuePointer(NodePointer.java:297)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.model.beans.PropertyIterator.getNodePointer(PropertyIterator.java:121)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.axes.DescendantContext.nextNode(DescendantContext.java:115)
> >> > >
> >> org.apache.commons.jxpath.ri.EvalContext.nextSet(EvalContext.java:349)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.axes.ChildContext.getSingleNodePointer(ChildContext.java:70)
> >> > >
> >> org.apache.commons.jxpath.ri.compiler.Path.searchForPath(Path.java:201)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.compiler.Path.getSingleNodePointerForSteps(Path.java:176)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.compiler.LocationPath.computeValue(LocationPath.java:87)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.getValue(JXPathContextReferenceImpl.java:353)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.getValue(JXPathContextReferenceImpl.java:313)
> >> > >
> >> > >
> >> > >
> >> >
> >>
> com.spotnana.webhooks.isos.PNRListBuilderTest.testJxPathCtx(PNRListBuilderTest.java:366)
> >> > >
> >> > > On Sun, Sep 24, 2023 at 1:24 AM Debraj Manna <
> >> subharaj.ma...@gmail.com>
> >> > > wrote:
> >> > >
> >> > > > I am trying to search using JxPath on a proto message, My proto
> >> message
> >> > > is
> >> > > > placed here
> >> > > > <
> >> https://gist.github.com/debraj-manna/4a8ded5d79dc9aee8d4c03d460327284
> >> > >.
> >> > > >
> >> > > > val protoStr =
> >> > > >
> getStringFromFile("classpath:BookingEnginePnrUpdateEventProto.txt");
> >> > > > val msgBld = BookingEnginePNRUpdateEvent.newBuilder();
> >> > > > TextFormat.getParser().merge(protoStr, msgBld);
> >> > > > val msgCtx = JXPathContext.newContext(msgBld.build());
> >> > > > System.out.println(msgCtx.getValue("//employeeId"));
> >> > > >
> >> > > > I am observing that msgCtx.getValue("//employeeId") is taking a
> >> lot of
> >> > > > time. Thread dumps at various points are placed in the below gist.
> >> > > >
> >> > > >
> >> https://gist.github.com/debraj-manna/47852fa190075abdacd527969f355cde
> >> > > >
> >> > > > If I specify the entire path like
> >> > > >
> >> > >
> >> >
> >>
> msgCtx.getValue("/metadata/bookerInfo/traveler/userBusinessInfo/employeeId").
> >> > > > It is working fine.
> >> > > >
> >> > > > Can someone let me know what is going wrong? Is this expected?
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> >
>
