[resteasy-dev] Microprofile OpenTracing integration for WF Swarm

[Alessio Soldano]

Hi Pavol,
as mentioned on hipchat, an idea could be to rely on the
ResteasyProviderFactory (which has a getInstance static method) and install
a dynamic client feature in it (e.g. using registerProviderInstance(Object
obj) method).
Perhaps you can try that and see if it fits your scenario.
For the executor, I'm afraid I don't see an already existing solution,
besides having your own ClientBuilder that overrides the executorService
setup; perhaps we can make this configurable in the
ResteasyProviderFactory, though.

If someone from the team has further idea, just reply ;-)
Cheers
Alessio


On Tue, Nov 21, 2017 at 5:22 PM, Pavol Loffay <ploffay at redhat.com> wrote:

> Hi,
>
> I am looking at microprofile-opentracing integration for Wildfly Swarm.
> Briefly, it is a distributed tracing for JAX-RS both server and client.
>
> Issue [1] describes what is necessary. But I will repeat here:
>
> Server
> 1. register server jax-rs filters (no problem, server features are
> auto-discovered)
> 2. use servlet filter to finish the span and log any exception to the span
> - because jax-rs filters do not capture exceptions
>
> Client
> 1. register tracing filters
> 2. use OpenTracing-aware ExecutorService - it's needed for async API to
> correctly propagate parent.
> (3.) TCK is not defined yet. However, if they want to create spans for
> UnknownHostException then we cannot use jax-rs client filters because they
> are not executed. Network attempt happens before the filter when the
> exception is thrown. To solve this we have to implement tracing in
> resteasy or supply apache HC with tracing filters enabled (it also has some
> problems).
>
>
> The biggest issue is with client because we need
> `ClientBuilder.newBuilder()` to return client/builder with enabled tracing.
>
> [1] https://issues.jboss.org/browse/SWARM-1691
>
>
> --
>
> PAVOL LOFFAY
>
> Red Hat Česká republika <https://www.redhat.com/>
>
> Purkyňova 115
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>
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> <https://red.ht/sig>
>
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