Now, it's time to consume our registered service. To achieve this, we implement another REST service, which acts as a client. The project structure for the client is as follows:

ClientInvokerResource is the actual service, with the implementation given in the following code block. We are injecting a Snoop-based client with the help of the @Snoop annotation, and the serviceName attribute matches the name that we used when registering the service:

@Path("/invoke")
@RequestScoped
public class ClientInvokerResource {
    @Inject
    @Snoop(serviceName = "weatherSnoop")
    private SnoopServiceClient client;

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public String invoke() {
       String response = client.simpleGet("temperature")
          .filter(r -> r.getStatus() == 200)
          .map(r -> r.readEntity(String.class))
          .orElse("Problem occurred!");
       return response;
   }
}

The following command sh0ws deploying the application onto Payara micro with port auto-binding enabled:

java -jar /path/to/payara-micro.jar --deploy /path/to/weather-snoop-client.war --autoBindHttp

We can use the URL http://localhost:8081/weather-snoop-client-1.0/client/invoke and it gives us the response from the Temperature service we deployed before.