Re: Reactive Services & CDI

Mon, 05 Feb 2018 02:05:13 -0800 

Hi John
On 04/02/18 19:19, John D. Ament wrote:

On Sun, Feb 4, 2018 at 2:01 PM Sergey Beryozkin <sberyoz...@gmail.com>
wrote:


I thought I'd point to the utility of that module anyway (by the way, in
the updated code below the AsyncResponse is also not needed)



Yep, I know that.  Was seeing the issue either way, and as far as I know
the AsyncResponse approach is the more spec appropriate way.
It is only needed in this case to init a CXF-specific subscriber hence a portability issue while without it one would have a portable code consistent with the way CompletableFuture is supported in 2.1 - where you just return it... 


In the servlet container you may need to enable the async (via the
standard servlet param).



haha, that was it.  Thanks!
Np, sometimes it is probably not needed, I thought I saw some examples before where it just works, may be some servlet containers are stricter... 

Sergey




Cheers, Sergey

On 04/02/18 17:59, John D. Ament wrote:

Sergey,

I think you're mixing emails (the email on dev@ is unrelated).

On Sun, Feb 4, 2018 at 12:53 PM Sergey Beryozkin <sberyoz...@gmail.com>
wrote:


That dependency you referred to should let you do:

    @Path("/")
    public class RestController {
         @GET
         @Produces(MediaType.APPLICATION_JSON)
         public Flux doGet(@Suspended AsyncResponse asyncResponse) {
             ClientBuilder.newClient()
                     .register(MyAppFeature.class)
                     .target("https://postman-echo.com/get";)
                     .queryParam("arg1", "arg1")
                     .queryParam("arg2", "arg2")
                     .request(MediaType.APPLICATION_JSON_TYPE)
                     .rx(ReactorInvoker.class)
                     .get(JsonObject.class);
    }

Not sure why Continuation is not init-ed though, something to do with
the servlet setup



Anything you can suggest to debug through?

I'm following the async example I wrote, but within a servlet container
(I'm assuming the systests are running a jetty instance).




Sergey



On 04/02/18 16:16, John D. Ament wrote:

BTW, sample project can be found @
https://github.com/johnament/cxf-demo-reactive-cdi


On Sun, Feb 4, 2018 at 11:13 AM John D. Ament <johndam...@apache.org>

wrote:



I built a simple webapp (WAR file, deploying to Tomcat) that depends

on

the CXF 3.2.2 libraries + Weld 3.0.2.  I don't believe CDI has

anything

to

do with my problem though.

I registered a feature/server customizer that can deal with the

invoker

logic required, and provided a rest controller that simply invokes the
postman echo service

Feature/Extension:

@ApplicationScoped
public class MyAppFeature implements Feature,
JAXRSServerFactoryCustomizationExtension {
       public boolean configure(FeatureContext featureContext) {
           featureContext.register(JsrProvider.class);
           featureContext.register(ReactorInvokerProvider.class);
           return true;
       }

       @Override
       public void customize(JAXRSServerFactoryBean

jaxrsServerFactoryBean) {

           ReactorInvoker invoker = new ReactorInvoker();
           invoker.setUseStreamingSubscriberIfPossible(false);
           jaxrsServerFactoryBean.setInvoker(invoker);
           StreamingResponseProvider<JsonObject> streamProvider = new
StreamingResponseProvider<>();





streamProvider.setProduceMediaTypes(Collections.singletonList("application/json"));

           jaxrsServerFactoryBean.setProvider(streamProvider);
           jaxrsServerFactoryBean.getOutInterceptors().add(new
LoggingOutInterceptor());
       }
}

RestController:

@RequestScoped
@Path("/")
public class RestController {
       @GET
       @Produces(MediaType.APPLICATION_JSON)
       public void doGet(@Suspended AsyncResponse asyncResponse) {
           ClientBuilder.newClient()
                   .register(MyAppFeature.class)
                   .target("https://postman-echo.com/get";)
                   .queryParam("arg1", "arg1")
                   .queryParam("arg2", "arg2")
                   .request(MediaType.APPLICATION_JSON_TYPE)
                   .rx(ReactorInvoker.class)
                   .get(JsonObject.class)
                   .subscribe(new
JsonStreamingAsyncSubscriber<>(asyncResponse));
       }
}

When I attempt to invoke this endpoint, I see a NPE in the logs

04-Feb-2018 11:07:20.245 WARNING [http-nio-8080-exec-69]
org.apache.cxf.phase.PhaseInterceptorChain.doDefaultLogging

Interceptor

for

{http://rest.mycompany.com/}RestController has thrown exception,
unwinding now
    java.lang.NullPointerException
at




org.apache.cxf.jaxrs.impl.AsyncResponseImpl.initContinuation(AsyncResponseImpl.java:306)

at




org.apache.cxf.jaxrs.impl.AsyncResponseImpl.<init>(AsyncResponseImpl.java:68)

at




org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameter(JAXRSUtils.java:826)

at




org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameters(JAXRSUtils.java:795)

at




org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.processRequest(JAXRSInInterceptor.java:214)

at




org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.handleMessage(JAXRSInInterceptor.java:78)

at




org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)

at




org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)

at




org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267)

at




org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234)

at




org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208)

at




org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160)

at




org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:191)

at




org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301)

at




org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:225)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
at




org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276)

at




org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)

at




org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at




org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

at




org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at




org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)

at




org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at




org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)

at




org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)

at




org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)

at




org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)

at




org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

at




org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)

at




org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)

at




org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

at




org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)

at
org.apache.tomcat.util.net

.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)

at
org.apache.tomcat.util.net

.SocketProcessorBase.run(SocketProcessorBase.java:49)

at




java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at




java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at




org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:748)

Is there anything else that needs to happen to register the invoker to
handle async responses?

John

Reply via email to