code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.integrations.destination.kafka;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.google.common.collect.ImmutableMap;
  import io.airbyte.commons.json.Jsons;
  import io.airbyte.integrations.BaseConnector;
  import io.airbyte.integrations.base.AirbyteMessageConsumer;
  import io.airbyte.integrations.base.Destination;
  import io.airbyte.integrations.base.IntegrationRunner;
  import io.airbyte.integrations.base.JavaBaseConstants;
  import io.airbyte.integrations.destination.StandardNameTransformer;
  import io.airbyte.protocol.models.AirbyteConnectionStatus;
  import io.airbyte.protocol.models.AirbyteConnectionStatus.Status;
  import io.airbyte.protocol.models.AirbyteMessage;
  import io.airbyte.protocol.models.ConfiguredAirbyteCatalog;
  import java.util.UUID;
  import java.util.function.Consumer;
  import org.apache.kafka.clients.producer.KafkaProducer;
  import org.apache.kafka.clients.producer.ProducerRecord;
  import org.apache.kafka.clients.producer.RecordMetadata;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class KafkaDestination extends BaseConnector implements Destination {
  
    private static final Logger LOGGER = LoggerFactory.getLogger(KafkaDestination.class);
  
    public static final String COLUMN_NAME_AB_ID = JavaBaseConstants.COLUMN_NAME_AB_ID;
    public static final String COLUMN_NAME_EMITTED_AT = JavaBaseConstants.COLUMN_NAME_EMITTED_AT;
    public static final String COLUMN_NAME_DATA = JavaBaseConstants.COLUMN_NAME_DATA;
    public static final String COLUMN_NAME_STREAM = "_airbyte_stream";
  
    private final StandardNameTransformer namingResolver;
  
    public KafkaDestination() {
      this.namingResolver = new StandardNameTransformer();
    }
  
    @Override
    public AirbyteConnectionStatus check(final JsonNode config) {
      try {
        final String testTopic = config.has("test_topic") ? config.get("test_topic").asText() : "";
        if (!testTopic.isBlank()) {
          final KafkaDestinationConfig kafkaDestinationConfig = KafkaDestinationConfig.getKafkaDestinationConfig(config);
          final KafkaProducer<String, JsonNode> producer = kafkaDestinationConfig.getProducer();
          final String key = UUID.randomUUID().toString();
          final JsonNode value = Jsons.jsonNode(ImmutableMap.of(
              COLUMN_NAME_AB_ID, key,
              COLUMN_NAME_STREAM, "test-topic-stream",
              COLUMN_NAME_EMITTED_AT, System.currentTimeMillis(),
              COLUMN_NAME_DATA, Jsons.jsonNode(ImmutableMap.of("test-key", "test-value"))));
  
          final RecordMetadata metadata = producer.send(new ProducerRecord<>(
              namingResolver.getIdentifier(testTopic), key, value)).get();
          producer.flush();
  
          LOGGER.info("Successfully connected to Kafka brokers for topic '{}'.", metadata.topic());
        }
        return new AirbyteConnectionStatus().withStatus(Status.SUCCEEDED);
      } catch (final Exception e) {
        LOGGER.error("Exception attempting to connect to the Kafka brokers: ", e);
        return new AirbyteConnectionStatus()
            .withStatus(Status.FAILED)
            .withMessage("Could not connect to the Kafka brokers with provided configuration. \n" + e.getMessage());
      }
    }
  
    @Override
    public AirbyteMessageConsumer getConsumer(final JsonNode config,
                                              final ConfiguredAirbyteCatalog catalog,
                                              final Consumer<AirbyteMessage> outputRecordCollector) {
      return new KafkaRecordConsumer(KafkaDestinationConfig.getKafkaDestinationConfig(config),
          catalog,
          outputRecordCollector,
          namingResolver);
    }
  
    public static void main(final String[] args) throws Exception {
      final Destination destination = new KafkaDestination();
      LOGGER.info("Starting destination: {}", KafkaDestination.class);
      new IntegrationRunner(destination).run(args);
      LOGGER.info("Completed destination: {}", KafkaDestination.class);
    }
  
  }
  