import ratpack.jackson.Jackson; //导入依赖的package包/类
@Override
public void handle(Context context) throws Exception {
    try {
        Blocking.get(
                () -> config.authenticate(injector, config.getInput(context))
        ).onError(t -> {
            if (t.getClass().equals(AuthenticationFailed.class)) {
                AuthenticationFailed failure = (AuthenticationFailed) t;
                context.getResponse().status(failure.getHttpStatus()).send(failure.getMessage());
            }
        }).then(claims -> {
            String token = jwtSigner.sign(claims.toMap());
            context.render(Jackson.json(token));
        });
    } catch (ParserException e) {
        LOGGER.info("Failed to parse Credential", e);
        context.getResponse().status(400).send();
    }
}
 

import ratpack.jackson.Jackson; //导入依赖的package包/类
@Override
public void render(Context context, Book book) throws Exception {
  context.byContent(byContentSpec -> byContentSpec
    .json(() ->
      context.render(Jackson.json(book))
    )
    .xml(() -> {
      XmlMapper xmlMapper = new XmlMapper();
      xmlMapper.configure(WRITE_XML_DECLARATION, true);
      context.render(xmlMapper.writeValueAsString(book));
    })
  );
}
 

import ratpack.jackson.Jackson; //导入依赖的package包/类
public void handle(final Context ctx, final BotOrchestrationService botOrchestrationService, final HipChatRequestValidator requestValidator) throws Exception {
    ctx.byMethod(m -> m
            .post(() -> ctx.parse(Jackson.fromJson(RoomMessage.class))
                    .next(msg -> botOrchestrationService.getActiveInstallationByOauthId(msg.getOauthId()).ifPresent(installation -> requestValidator.validate(ctx.getRequest(), installation.getOauthSecret())))
                    .next(botOrchestrationService::onRoomMessage)
                    .then(msg -> ctx.getResponse().status(Status.OK).send())
            )
    );
}
 

import ratpack.jackson.Jackson; //导入依赖的package包/类
@Override
public <T> T getInput(Context context, Class<T> javaType) throws Exception {
    return Blocking.on(context.parse(Jackson.fromJson(javaType)));
}