我使用下面的代码块发送Kafka消息，我需要初始化吗 CallBack 每次发送信息时？我只能使用单示例回调吗？

@Override
    public void produce(String txnLogStr) {
      ProducerRecord<String, String> record = new ProducerRecord<String, String>(topic, txnLogStr);
      producer.send(record, new ProducerCallback());
   }

pom.xml文件

<!-- KAFKA-QUEUE -->
    <dependency>
        <groupId>org.apache.kafka</groupId>
        <artifactId>kafka_2.11</artifactId>
        <version>0.10.2.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.kafka</groupId>
        <artifactId>kafka-clients</artifactId>
        <version>0.10.2.0</version>
    </dependency>