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import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;
import java.util.concurrent.Future;
public class JavaProducerTest {
public static void main(String[] args) {
String bootstrapServers = args.length > 0 ? args[0] : "localhost:9093";
String topicName = args.length > 1 ? args[1] : "test-topic";
System.out.println("Testing Kafka Producer with broker: " + bootstrapServers);
System.out.println(" Topic: " + topicName);
Properties props = new Properties();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
props.put(ProducerConfig.CLIENT_ID_CONFIG, "java-producer-test");
props.put(ProducerConfig.ACKS_CONFIG, "1");
props.put(ProducerConfig.RETRIES_CONFIG, 0);
props.put(ProducerConfig.MAX_BLOCK_MS_CONFIG, 10000);
System.out.println("Creating Producer with config:");
props.forEach((k, v) -> System.out.println(" " + k + " = " + v));
try (KafkaProducer<String, String> producer = new KafkaProducer<>(props)) {
System.out.println("Producer created successfully");
// Try to send a test message
System.out.println("\n=== Test: Send Message ===");
try {
ProducerRecord<String, String> record = new ProducerRecord<>(topicName, "key1", "value1");
System.out.println("Sending record to topic: " + topicName);
Future<RecordMetadata> future = producer.send(record);
RecordMetadata metadata = future.get(); // This will block and wait for response
System.out.println("Message sent successfully!");
System.out.println(" Topic: " + metadata.topic());
System.out.println(" Partition: " + metadata.partition());
System.out.println(" Offset: " + metadata.offset());
} catch (Exception e) {
System.err.println("Send failed: " + e.getMessage());
e.printStackTrace();
// Print cause chain
Throwable cause = e.getCause();
int depth = 1;
while (cause != null && depth < 5) {
System.err.println(
" Cause " + depth + ": " + cause.getClass().getName() + ": " + cause.getMessage());
cause = cause.getCause();
depth++;
}
}
System.out.println("\nTest completed!");
} catch (Exception e) {
System.err.println("Producer creation or operation failed: " + e.getMessage());
e.printStackTrace();
System.exit(1);
}
}
}
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