chore: update Quarkus example (#466)

* Server accepts both: binary and structured encoded events.
* Emitter contains comment describing how to switch between binary and
  structured encoding for emitted events.

Signed-off-by: Matej Vasek <mvasek@redhat.com>

Author: matejvasek

examples/restful-ws-quarkus/src/main/java/io/cloudevents/examples/quarkus/client/UserClient.java

@@ -12,6 +12,8 @@
 @RegisterRestClient
 public interface UserClient {
 
+    // This will emit binary encoded events.
+    // To use structured JSON encoding use @Produces(JsonFormat.CONTENT_TYPE).
     @POST
     @Produces(MediaType.APPLICATION_JSON)
     void emit(CloudEvent event);

examples/restful-ws-quarkus/src/main/java/io/cloudevents/examples/quarkus/resources/UserResource.java

@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.cloudevents.CloudEvent;
 import io.cloudevents.examples.quarkus.model.User;
+import io.cloudevents.jackson.JsonFormat;
 import io.cloudevents.jackson.PojoCloudEventDataMapper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -17,8 +18,8 @@
 import java.util.Map;
 
 @Path("/users")
-@Consumes(MediaType.APPLICATION_JSON)
-@Produces(MediaType.APPLICATION_JSON)
+@Consumes({MediaType.APPLICATION_JSON, JsonFormat.CONTENT_TYPE})
+@Produces({MediaType.APPLICATION_JSON})
 public class UserResource {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(UserResource.class);