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https://issues.apache.org/jira/browse/CXF-8179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andriy Redko resolved CXF-8179.
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Resolution: Fixed
> JSON Jackson does not handle resource returning CompletionStage<X>
> ------------------------------------------------------------------
>
> Key: CXF-8179
> URL: https://issues.apache.org/jira/browse/CXF-8179
> Project: CXF
> Issue Type: Bug
> Components: JAX-RS
> Affects Versions: 3.2.11, 3.3.4
> Reporter: Baptiste AIGLIN
> Assignee: Andriy Redko
> Priority: Major
> Fix For: 3.4.0, 3.3.5, 3.2.12
>
> Attachments: cxf-mp-reproducer.zip, exception.txt
>
>
> Hello,
>
> While testing to integrate the CXF Microprofile implementation in order to
> perform asynchronous client calls using client proxies, I encounter the
> Exception raised by the json provider due to the returned generic type being
> CompletionStage.
>
> It is clear that MicroProfileClientProxyImpl#getReturnType(Method, Message)
> is behaving correctly regarding the returnType, however inside the
> ClientProxyImpl#handleResponse(Message, Class<?>) we also compute the
> genericType based on the method.getGenericReturnType() which is of type
> CompletionStage, therefore the provider is not able to deserialize the String
> correctly as internally it uses the genericType.
> Do you think it could be possible to update the
> InjectionUtils.processGenericTypeIfNeeded to add cases for CompletionStage
> in order to change the genericType returned in this case ?
>
>
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