kafka的生产者配置以及发送信息的三种方式

1、Fire-and-forget

这种方式是不管发送成功与否，客户端都会返回成功。尽管大多数的时候Kafka 在发送失败后，会自己重新自动再一次发送消息，但是也会存在丢失消息的风险

ProducerRecord<String, String> record = new ProducerRecord<String, String>(TOPIC, "Msg-Fire-Forget",
                "Welcome to my home!!! ");
        try {
            producer.send(record);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            producer.close();

        }

2、Synchronous send---同步

这种方式是同步发送的方式，会等待future 对象的返回来判断是否发送成功。

ProducerRecord<String, String> record = new ProducerRecord<String, String>(TOPIC, "Msg-Sync",
                "Sync Message");
        try {
            RecordMetadata rec = producer.send(record).get();
            System.out.println(rec.topic());
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            producer.close();

        }

3、Asynchronous send---异步回调

异步发送基于实现了send() 方法的回调函数

ProducerRecord<String, String> record = new ProducerRecord<String, String>(TOPIC, "Msg-Async",
                "Sync Message");
        try {
            System.out.println("Staring Sending....");
            producer.send(record,new Callback() {
                @Override
                public void onCompletion(RecordMetadata metadata, Exception exception) {
                    System.out.println("Got FeedBack....");
                }});
            System.out.println("Stop Sending....");
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            producer.close();

        } 

参考：https://blog.csdn.net/chenxu_0209/article/details/84775959