CloseableHttpAsyncClient asyncHttpClient = ClientFactory.getAsyncHttpClient();
if (!asyncHttpClient.isRunning()) {
asyncHttpClient.start();
AsyncIdleConnectionMonitorThread asyncIdleConnectionMonitorThread = (AsyncIdleConnectionMonitorThread) Options.getOption(Option.ASYNC_MONITOR);
asyncIdleConnectionMonitorThread.start();
}
final Future<org.apache.http.HttpResponse> future = asyncHttpClient.execute(requestObj,
prepareCallback(responseClass, callback));