Add initial implementation

[pavolloffay]

Initial implementation.

Signed-off-by: Pavol Loffay ploffay@redhat.com

[pavolloffay]

One TCK which invokes async resource is failing https://github.com/eclipse/microprofile-opentracing/blob/master/tck/src/main/java/org/eclipse/microprofile/opentracing/tck/application/TestServerWebServices.java#L208.

It fails because server span is not finished. It should be finished in AsyncListener https://github.com/opentracing-contrib/java-jaxrs/blob/master/opentracing-jaxrs2/src/main/java/io/opentracing/contrib/jaxrs2/server/SpanFinishingFilter.java#L68. However, the AsyncListener is never invoked. The TCK was passing in Swarm correctly.

@kenfinnigan @mkouba do you know why the AsyncListener is not invoked? Can you point somebody from resteasy/undertow who might help?

[pavolloffay]

Is there a way to find out in filter that async request has been completed?
Is there a way to have a globally registered AsyncListener or some completion callbak?

[mkouba]

@pavolloffay Hm, is the filter registered successfully?

[pavolloffay]

It is, otherwise, other TCKs would fail.

[pavolloffay]

Just referencing ML discussions related to the failing TCK, at the moment without resolution:
http://lists.jboss.org/pipermail/resteasy-dev/2018-July/000545.html
https://issues.jboss.org/browse/UNDERTOW-1258
http://lists.jboss.org/pipermail/undertow-dev/2018-July/002234.html

[pavolloffay]

Based on the discussion on ML, there seems to be a bug in the undertow.

@mkouba @kenfinnigan to unblock work on this I would just temporarily skip this one test and track the progress in a separate issue.

[mkouba]

@pavolloffay +1; just exclude the test in tck-suite.xml and create a new github issue.

[pavolloffay]

Done, #5, the link is also in the comment in tck-suite.xml.

Can somebody review/approve?