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Classes for organizing async web applications

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package com.fnklabs.splac;

import com.google.common.util.concurrent.FutureCallback;
import com.google.gson.JsonIOException;
import com.google.gson.JsonSyntaxException;
import org.eclipse.jetty.continuation.Continuation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ResponseCallback implements FutureCallback> {
    private static final Logger LOGGER = LoggerFactory.getLogger(ResponseCallback.class);

    private final Continuation continuation;
    private final Request request;

    public ResponseCallback(Request request, Continuation continuation) {
        this.request = request;
        this.continuation = continuation;
    }

    public void onSuccess(Response result) {
        continuation.setAttribute("response", result);
        continuation.resume();
    }

    @Override
    public void onFailure(Throwable t) {
        LOGGER.warn("Cant execute request");

        if (t instanceof JsonIOException || t instanceof JsonSyntaxException) {
            Response response = new Response<>(request.getId());
            response.setCode(StatusCode.SERIALIZATION_ERROR);

            continuation.setAttribute("response", response);
            continuation.resume();
        } else {
            Response response = new Response(request.getId());
            response.setCode(StatusCode.ERROR);

            continuation.setAttribute("response", response);
            continuation.resume();
        }
    }
}