How to read request body from HttpAsyncRequestProducer?

Question

I am unable to get request body from this HttpAsyncRequestProducer of org.apache.http.nio.protocol.

I also want to read the request body multiple times.

My Usecase:

I am intercepting execute method of InternalHttpAsyncClient of org.apache.http.impl.nio.client (which has an argument called HttpAsyncRequestProducer) using Bytebuddy and trying to capture request and response and save it.

Since ElasticSearch using High level rest-client is ultimately using this client's method only. So, for this purpose I want to read the request body multiple times.

public <T> Future<T> execute(HttpAsyncRequestProducer requestProducer, HttpAsyncResponseConsumer<T> responseConsumer, HttpContext context, FutureCallback<T> callback) {
        this.ensureRunning();
        BasicFuture<T> future = new BasicFuture(callback);
        HttpClientContext localcontext = HttpClientContext.adapt((HttpContext)(context != null ? context : new BasicHttpContext()));
        this.setupContext(localcontext);
        DefaultClientExchangeHandlerImpl<T> handler = new DefaultClientExchangeHandlerImpl(this.log, requestProducer, responseConsumer, localcontext, future, this.connmgr, this.connReuseStrategy, this.keepaliveStrategy, this.exec);

        try {
            handler.start();
        } catch (Exception var9) {
            handler.failed(var9);
        }

        return new FutureWrapper(future, handler);
    }

Above is the actual method i am intercepting with the below interceptor.

 @RuntimeType
    public static Future<Object> doProceed(@Origin Method method, @SuperCall Callable<Future<Object>> callable, @AllArguments Object[] args) throws Exception {
        System.out.println("Inside ElasticSearchInterceptor");

        System.out.println("ElasticSearchInterceptor: Method-> " + method);

        int i = 0;
        for (Object obj : args) {
            System.out.println("Argument[" + i + "]: " + obj);
            i++;
        }

        HttpAsyncRequestProducer requestProducer = (HttpAsyncRequestProducer) args[0];

   // how to read the request body?????


        HttpRequest httpRequest = requestProducer.generateRequest();

        System.out.println("ElasticSearchInterceptor: Request Headers-> " + Arrays.toString(httpRequest.getAllHeaders()));



        System.out.println("ElasticSearchInterceptor: Before call");
        Future<Object> call = callable.call();
        HttpResponse res = (HttpResponse) call.get();
        System.out.println("Response in elastic search " + res);

        System.out.println("ElasticSearchInterceptor: After call");

        return call;
    }

Any help would be appreciated.