Spring Reactive get body JSONObject using ServerRequest

I think you can try to register a kind of 'callback' in the next way:

        return request.bodyToMono(JSONObject.class)
                  .doOnNext(jsonObject -> // testing..)
                  .then(ServerResponse.ok().build());

Also, I noticed that you are casting ServerResponse.ok() to Mono<ServerResponse>. I think it will not cast. Use ServerResponse.ok().build() to make Mono<ServerResponse>.

thank you. Alexander Terekhov

Your answer has been a lot of help in solving the problem.

My Test Code.

RouterFunction = Same as existing code.

Handler

public Mono<ServerResponse> toRESTInVerticle(ServerRequest serverRequest) {
    String uri = serverRequest.uri().toString();
    String method = serverRequest.methodName();
    String contentType = serverRequest.headers().contentType().get().toString();
    String characterSet = serverRequest.headers().acceptCharset().get(0).toString();
    JSONObject bodyData = serverRequest.bodyToMono(JSONObject.class).toProcessor().peek();

    System.out.println("==========toRESTInVerticle Data Check==========");
    System.out.println(uri);
    System.out.println(method);
    System.out.println(contentType);
    System.out.println(characterSet);
    System.out.println(bodyData);
    System.out.println("======toRESTInVerticle Data Check Complete======");

    return Mono.empty();
}

and the result in console as provided below :-

==========toRESTInVerticle Data Check==========
http://localhost:8082/input/event/check
POST
application/json
UTF-8
{"event_type":"12","event_name_order":["aa","bb","cc"],"event_query":"","event_name":"aaaa","init_value":"","init_value_yn":"N","event_descp":"ddd"}
======toRESTInVerticle Data Check Complete======

Happy Coding Thank you.