[jira] [Commented] (CXF-7922) Unable to invoke default interface methods in proxy-based clients

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CXF-7922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16711945#comment-16711945 ] 

ASF GitHub Bot commented on CXF-7922:
-------------------------------------

andymc12 opened a new pull request #480: [CXF-7922] Invoke default interface methods on client interfaces
URL: https://github.com/apache/cxf/pull/480
 
 
   Runtime code changes based on patterns described here:
   https://rmannibucau.wordpress.com/2014/03/27/java-8-default-interface-methods-and-jdk-dynamic-proxies/
   
   This enables default interface methods to be invoked when they are not overridden or annotated with `@GET`-type annotations.

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> Unable to invoke default interface methods in proxy-based clients
> -----------------------------------------------------------------
>
>                 Key: CXF-7922
>                 URL: https://issues.apache.org/jira/browse/CXF-7922
>             Project: CXF
>          Issue Type: Bug
>          Components: JAX-RS
>    Affects Versions: 3.2.7
>            Reporter: Andy McCright
>            Assignee: Andy McCright
>            Priority: Minor
>
> {{When invoking a default method on an interface used as a MicroProfile Rest Client interface (and presumably the JAX-RS proxy-based client), I see the following exception:}}
> {{javax.ws.rs.ProcessingException: Method org.apache.cxf.microprofile.client.mock.MyClient.myDefaultMethod is not a valid resource method}}
> {{ at org.apache.cxf.microprofile.client.CxfTypeSafeClientBuilderTest.testCanInvokeDefaultInterfaceMethods(CxfTypeSafeClientBuilderTest.java:172)}}
>  
> Invoking default interface methods from a dynamic proxy's InvocationHandler is outlined in this article:
> [https://rmannibucau.wordpress.com/2014/03/27/java-8-default-interface-methods-and-jdk-dynamic-proxies/]
>  
> {{This type of operation becomes critical when combining the MicroProfile Rest Client with MP Fault Tolerance annotations like this:}}
> {{public interface MyClient {}}
> {{    @GET}}
> {{    @Fallback(fallbackMethod="useFallback")}}
> {{    String tryActualRemoteRequest();}}
> {{}}{{    default String useFallback() {}}
> {{        return "useful default value";}}
> {{    }}}
> {{}}}



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