Hi Jaideep,
The marshalling code should be threadsafe, so I don't think your problem
relates to that aspect of the application - especially since this occurs
when you're trying to look up the binding factory.
The most puzzling part of this is that the BindingDirectory code is just
using reflection on the class you pass in (always Letter.class in this
case) to get the factory class name, and then a call to loadClass() to
load the factory. The classloader used for attempting to load the
factory class is that used to load the class you pass in (again, always
Letter.class), so the only way I can see to have it work sometimes and
not other times is if you have multiple classloaders in use and somehow
one doesn't have the factory class in its path. The other alternative is
that loadClass() has some thread safety issue, but I find that very hard
to imagine unless you're using some custom classloader. Anything unusual
with your classloader configuration?
Just as a general note, your code takes an ILetter as input, but then
looks up the binding on the assumption that it's an instance of the
Letter class instance. A cleaner approach would be to use:
IBindingFactory bfact =
BindingDirectory./getFactory/(bindingName,
letter.getClass());
so that you're loading the binding from the actual instance class passed
in. I don't see how this could be the cause of your current problem, but
it's better coding for future variations.
- Dennis
Dennis M. Sosnoski
SOA and Web Services in Java
Training and Consulting
http://www.sosnoski.com - http://www.sosnoski.co.nz
Seattle, WA +1-425-939-0576 - Wellington, NZ +64-4-298-6117
Jaideep Deshmukh wrote:
>
> hi,
>
> I have several mappings in our JiBX application which we access by
> binding Name.
> I have got the following Exception
>
> org.jibx.runtime.JiBXException: Unable to access binding information
> for class *entity.businessDomain.letter.Letter*
> Make sure classes generated by the binding compiler are available at
> runtime
>
> Unable to access binding information for class
> entity.businessDomain.letter.Letter
> Make sure classes generated by the binding compiler are available at
> runtime
> java.lang.ClassNotFoundException:
> entity.businessDomain.letter.JiBX_CBP_B1Factory
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1340)
>
>
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
>
>
> at
> org.jibx.runtime.BindingDirectory.getFactoryFromName(BindingDirectory.java:104)
>
>
> at
> org.jibx.runtime.BindingDirectory.getFactory(BindingDirectory.java:178)
> at
> org.jibx.runtime.BindingDirectory.getFactory(BindingDirectory.java:197)
> at
> entity.businessDomain.letter.generation.xml.XmlBinding.toXml(XmlBinding.java:28)
>
>
> at
> entity.businessDomain.letter.generation.LetterCreationService.printLetters(LetterCreationService.java:95)
>
>
> at
> entity.businessDomain.letter.generation.LetterCreationService.run(LetterCreationService.java:68)
>
>
> at java.lang.Thread.run(Thread.java:595)
>
>
> *entity.businessDomain.letter.Letter* is the class for which i have
> written the binding file.
>
> *CBP_B1* is the name of the binding. The thing to note here is that I
> have successfully marshallled another object using the same binding in
> the same run.
>
> But it failed for a perticular object with ClassNotFoundException. I
> also checked the jar files for the class
> *entity.businessDomain.letter.JiBX_CBP_B1Factory*
> and it appears in there.
>
> One more thing I am doing is , I am using 5 threads at a time to pick
> Letter Objects from a BlockingQueue and then Marshall them. The
> marshalling code
> is not synchronised.
>
> The method i Use for Marshalling is
>
> *public* *static* *void* toXml(ILetter letter, String bindingName,
> Writer wr,
> String path) *throws* JiBXException,
> IOException {
> IBindingFactory bfact =
> BindingDirectory./getFactory/(bindingName,
> Letter.*class*);
> IMarshallingContext mctx =
> bfact.createMarshallingContext();
> mctx.setOutput(wr);
> mctx.startDocument("UTF-8", *null*);
> mctx.setIndent(4);
> mctx.getXmlWriter().writeDocType("letter_requests",
> path, *null*, *null*);
> mctx.marshalDocument(letter);
> }
>
> Is JiBX Marshalling Threadsafe?
>
> Is that something which might be causing the problem. I can not think
> of any reason why a ClassNotFoundException should be thrown when it is
> in the classpath.
> Also When in other cases it has been successfully marshalled using the
> same binding, in the same run.
>
>
> We desparately need to find the problem. Any ideas will be a great help.
> I hope i have covered all the information, if you need more please let
> me know.
>
> thaanks & regards,
>
>
>
> Jaideep Deshmukh
> Senior J2EE Developer
>
> e: mailto:jdeshm...@closepf.com
> w: http://www.closepf.com
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