Hi, I am facing a problem where jsonb adapter is not invoked. Here is a simplified case.
jaxrs application --------------------------- @ApplicationPath("/app") public class App extends Application{ } adapter ------------------------ public class B implements JsonbAdapter<Book, JsonObject> { @Override public JsonObject adaptToJson(Book obj) throws Exception { return Json.createObjectBuilder() .add("customfield", obj.getId() + " " + obj.getTitle()) .build(); } @Override public Book adaptFromJson(JsonObject obj) throws Exception { throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. } } dto ------------------------ public class Book { private int id; private String title; public Book() { } public Book(int id, String title) { this.id = id; this.title = title; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } } resource ----------------------- @Path("/r") public class R { @GET @Produces({MediaType.APPLICATION_JSON}) public Response response() { Book book = new Book(100, "Apache Tomee"); JsonbConfig config = new JsonbConfig() .withFormatting(true) .withAdapters(new B()); Jsonb jsonb = JsonbBuilder.create(config); String toJson = jsonb.toJson(book); return Response.ok(toJson).build(); } } What am i missing? Thanks.