Add a section in the doc of Resteasy and Resteasy reactive to describ…

…e the feature

docs/src/main/asciidoc/rest-json.adoc

@@ -605,6 +605,26 @@ If set to `true` (default) then a *single instance* of a resource class is creat
 If set to `false` then a *new instance* of the resource class is created per each request.
 An explicit CDI scope annotation (`@RequestScoped`, `@ApplicationScoped`, etc.) always overrides the default behavior and specifies the lifecycle of resource instances.
 
+== Include/Exclude JAX-RS classes with build time conditions
+
+Quarkus allows to include or exclude root resource, provider and feature classes directly thanks to build time conditions like it is possible with CDI beans.
+Indeed, the different JAX-RS classes can be annotated with profile conditions (`@io.quarkus.arc.profile.IfBuildProfile` or `@io.quarkus.arc.profile.UnlessBuildProfile`) and/or with property conditions (`io.quarkus.arc.properties.IfBuildProperty` or `io.quarkus.arc.properties.UnlessBuildProperty`) to indicate to Quarkus at build time under which conditions the JAX-RS classes should be included.
+
+In the following example, Quarkus includes the endpoint `sayHello` if and only if the build profile `app1` has been enabled.
+
+[source,java]
+----
+@IfBuildProfile("app1")
+public class ResourceForApp1Only {
+
+    @GET
+    @Path("sayHello")
+    public String sayHello() {
+        return "hello";
+     }
+}
+----
+
 == Conclusion
 
 Creating JSON REST services with Quarkus is easy as it relies on proven and well known technologies.

docs/src/main/asciidoc/resteasy-reactive.adoc

@@ -1790,3 +1790,23 @@ Or plain text:
 < 
 < {"name":"roquefort"} 
 ----
+
+== Include/Exclude JAX-RS classes with build time conditions
+
+Quarkus allows to include or exclude root resource, provider and feature classes directly thanks to build time conditions like it is possible with CDI beans.
+Indeed, the different JAX-RS classes can be annotated with profile conditions (`@io.quarkus.arc.profile.IfBuildProfile` or `@io.quarkus.arc.profile.UnlessBuildProfile`) and/or with property conditions (`io.quarkus.arc.properties.IfBuildProperty` or `io.quarkus.arc.properties.UnlessBuildProperty`) to indicate to Quarkus at build time under which conditions the JAX-RS classes should be included.
+
+In the following example, Quarkus includes the endpoint `sayHello` if and only if the build profile `app1` has been enabled.
+
+[source,java]
+----
+@IfBuildProfile("app1")
+public class ResourceForApp1Only {
+
+    @GET
+    @Path("sayHello")
+    public String sayHello() {
+        return "hello";
+     }
+}
+----