我已经实现了一个java消费者，它使用来自kafka主题的消息，然后将这些消息与post请求一起发送到restapi。

while (true) {
        ConsumerRecords<String, Object> records = consumer.poll(200);
        for (ConsumerRecord<String, Object> record : records) {
            CloseableHttpClient httpClient = HttpClientBuilder.create().build();  
            Object message = record.value();
            JSONObject jsonObj = new JSONObject(message.toString());
            try {
                HttpPost request = new HttpPost(this.getConsumerProperties().getProperty("api.url"));
                StringEntity params = new StringEntity(message.toString());
                request.addHeader("content-type", "application/json");
                request.addHeader("Accept", "application/json");
                request.setEntity(params);

                CloseableHttpResponse response = httpClient.execute(request);
                HttpEntity entity = response.getEntity();
                String responseString = EntityUtils.toString(entity, "UTF-8");
                System.out.println(message.toString());
                System.out.println(responseString);
            } catch(Exception ex) {
              ex.printStackTrace();
            }  finally {
                try {   
                    httpClient.close(); 
                } catch(IOException ex) {
                    ex.printStackTrace();
                } 
            }                  
        } 
    }

假设消息已被使用，但java类未能访问restapi。消息将永远不会被传递，但它将被标记为已使用。处理此类案件的最佳方法是什么？当且仅当restapi的响应成功时，我能以某种方式确认消息吗？