Meneroka Aliran Awan Musim Bunga Kafka Binder Pemintas Pengguna

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-stream-kafka</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR10</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter'
    implementation 'org.springframework.cloud:spring-cloud-starter-stream-kafka'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:Hoxton.SR10"
    }
}

spring:
  cloud:
    stream:
      bindings:
        input:
          destination: my-topic
          group: my-group
          consumer:
            interceptor-classes: com.example.MyConsumerInterceptor
      kafka:
        binder:
          brokers: localhost:9092

package com.example;

import org.apache.kafka.clients.consumer.ConsumerInterceptor;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.common.Configurable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Map;

public class MyConsumerInterceptor implements ConsumerInterceptor<String, String>, Configurable {

    private static final Logger logger = LoggerFactory.getLogger(MyConsumerInterceptor.class);

    @Override
    public ConsumerRecords<String, String> onConsume(ConsumerRecords<String, String> records) {
        records.forEach(record -> {
            logger.info("Intercepted record: key = {}, value = {}", record.key(), record.value());
            // Add your custom logic here
        });
        return records;
    }

    @Override
    public void onCommit(Map offsets) {
        // Custom logic on commit
    }

    @Override
    public void close() {
        // Cleanup resources if necessary
    }

    @Override
    public void configure(Map<String, ?> configs) {
        // Configuration logic
    }
}

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.messaging.Message;

@SpringBootApplication
@EnableBinding(KafkaProcessor.class)
public class KafkaConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(KafkaConsumerApplication.class, args);
    }

    @StreamListener("input")
    public void handle(Message<String> message) {
        System.out.println("Received message: " + message.getPayload());
    }
}

package com.example;

import org.springframework.cloud.stream.annotation.Input;
import org.springframework.messaging.SubscribableChannel;

public interface KafkaProcessor {
    String INPUT = "input";

    @Input(INPUT)
    SubscribableChannel input();
}