Java - AsyncHttpClient - 中止正在进行的异步调用

Question

我正在使用HttpAsyncClient来GET一些url。在某些情况下，假设当我收到状态 HTTP-304 时，我想放弃正在进行的调用。我不想等待尸体，我不想在它上面花费机器资源。有什么办法可以取消这个吗？显然，诸如 futureResponse.cancel(true) 或 futureResponse.finalize() 之类的东西不起作用。

Future<Response> futureResponse = httpClient.prepareGet("some-url").addHeader("some", "header").execute(new AsyncCompletionHandler<Response>() {
    @Override
    public State onStatusReceived(HttpResponseStatus status) throws Exception {
        logger.info("status {}", status);
        // CONDITIONAL FINISH THIS CALL
        return super.onStatusReceived(status);
    }

    @Override
    public Response onCompleted(Response response) throws Exception {
        logger.info("its ok");
        return response;
    }

    @Override
    public void onThrowable(Throwable t) {
        logger.error(t);
    }
});

Answer 1

来自doc :

您可以返回 ABORT 来关闭连接。

    @Override
    public State onStatusReceived(HttpResponseStatus responseStatus) throws Exception {
        Integer status = responseStatus.getStatusCode();
        if (304 == status) {  // CONDITIONAL FINISH THIS CALL
            return State.ABORT;
        } else {
            doSomething()
            return ...
        }           
    }