Netty是一个高性能的异步事件驱动的网络应用框架,主要用于快速开发可维护的高性能协议服务器和客户端。Kafka是一个分布式流处理平台,主要用于构建实时数据管道和流应用程序,可以处理高吞吐量的数据,并且具备良好的可扩展性和容错性。以下是搭建Netty和Kafka的基本步骤:
public class NettyKafkaProducer {
public static void main(String[] args) throws InterruptedException {
// 创建Kafka生产者配置
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
// 创建Kafka生产者
Producer<String, String> producer = new KafkaProducer<>(props);
// 发送消息到Kafka
ProducerRecord<String, String> record = new ProducerRecord<>("my-topic", "key", "value");
producer.send(record, new Callback() {
public void onCompletion(RecordMetadata metadata, Exception exception) {
if (exception != null) {
exception.printStackTrace();
} else {
System.out.println("Sent message to topic: " + metadata.topic() + " partition: " + metadata.partition() + " offset: " + metadata.offset());
}
}
});
// 关闭生产者
producer.close();
}
}
public class NettyKafkaConsumer {
public static void main(String[] args) throws InterruptedException {
// 创建Kafka消费者配置
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("group.id", "my-group");
props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
// 创建Kafka消费者
KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
// 订阅主题
consumer.subscribe(Arrays.asList("my-topic"));
// 消费消息
while (true) {
ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<String, String> record : records) {
System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
}
}
}
}
以上步骤和代码示例展示了如何搭建Netty和Kafka环境,并实现简单的消息发送和接收。请根据实际需求调整配置和代码。