public class ConcurrentServer {
public static void main(String[] args) throws IOException {
ServerSocket serverSocket = new ServerSocket(8080);
while (true) {
Socket clientSocket = serverSocket.accept();
Thread thread = new Thread(new ClientHandler(clientSocket));
thread.start();
}
}
}
class ClientHandler implements Runnable {
private Socket clientSocket;
public ClientHandler(Socket clientSocket) {
this.clientSocket = clientSocket;
}
@Override
public void run() {
// ...
}
}
ExecutorService executorService = Executors.newFixedThreadPool(10);
executorService.submit(new Runnable() {
@Override
public void run() {
// ...
}
});
executorService.shutdown();
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");
KafkaProducer<String, String> producer = new KafkaProducer<>(props);
ProducerRecord<String, String> record = new ProducerRecord<>("my-topic", "key", "value");
producer.send(record);
producer.close();
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("group.id", "my-consumer-group");
props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
consumer.subscribe(Collections.singletonList("my-topic"));
while (true) {
ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<String, String> record : records) {
// ...
}
}
