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https://issues.apache.org/jira/browse/CXF-6902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296142#comment-15296142
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Sergey Beryozkin commented on CXF-6902:
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It did not brake the backward compatibility, it fixed a spec compliance issue
which is what I said in my previous comment, a TCK test exists which enforces
that by default numbers are only supported if it is text/plain. Please also
check a JAX-RS 2.0 spec (section on the default providers).
If you think about it, the fact CXF 2.7 was 'supporting' numbers when
application/json was expected by writing them as invalid JSON sequences (by
simply converting them to String) was a genuine bug. Clearly you'd not want
that repeated if you'd like a real application/json sequence be reported.
However if you'd like you can register a custom MBW/MBR or may be Jackson which
will convert these integers. But given the way it worked before for you, where
integers were reported as non-JSON sequences, may be a simpler/better way to
update Produces to text/plain
Thanks for debugging though - it will help you in case you may want to check
some other details in the future. Also as I said earlier - please do direct
such queries to the users list.
Cheers, Sergey
> Problem with resource that returns Object with CXF version == 3.1.2
> -------------------------------------------------------------------
>
> Key: CXF-6902
> URL: https://issues.apache.org/jira/browse/CXF-6902
> Project: CXF
> Issue Type: Bug
> Components: JAXB Databinding
> Affects Versions: 3.1.2
> Reporter: Balarami Reddy
> Assignee: Sergey Beryozkin
>
> Hello,
> We have recently migrated from 2.7 to 3.1.2 and we see a behaviour change in
> CXF which blocked us from making progress.
> The sample code below gives "No message body writer has been found for
> response class Integer" which used to work perfect in CXF 2.7
> This is just sample code only. We have in our product several rest calls
> which return integer/long/Object etc based on some calculations.
> @GET
> @Produces(MediaType.APPLICATION_JSON)
> @Path("/getinteger")
> public Response getInteger() {
> return Response.ok(4).build();
> }
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