content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.camel.quarkus.component.kafka;
  
  import java.util.Map;
  import java.util.Properties;
  
  import org.apache.camel.component.kafka.DefaultKafkaClientFactory;
  import org.apache.camel.component.kafka.KafkaConfiguration;
  import org.apache.kafka.clients.CommonClientConfigs;
  import org.apache.kafka.clients.consumer.Consumer;
  import org.apache.kafka.clients.consumer.ConsumerConfig;
  import org.apache.kafka.clients.producer.Producer;
  
  /**
   * Custom {@link org.apache.camel.component.kafka.KafkaClientFactory} to enable Kafka configuration properties
   * discovered by the Quarkus Kubernetes Service Binding extension to be merged with those configured from
   * the Camel Kafka component and endpoint URI options.
   */
  public class QuarkusKafkaClientFactory extends DefaultKafkaClientFactory {
  
      private final Map<String, Object> quarkusKafkaConfiguration;
  
      public QuarkusKafkaClientFactory(Map<String, Object> quarkusKafkaConfiguration) {
          this.quarkusKafkaConfiguration = quarkusKafkaConfiguration;
      }
  
      @Override
      public Producer getProducer(Properties camelKafkaProperties) {
          mergeConfiguration(camelKafkaProperties);
          return super.getProducer(camelKafkaProperties);
      }
  
      @Override
      public Consumer getConsumer(Properties camelKafkaProperties) {
          mergeConfiguration(camelKafkaProperties);
          return super.getConsumer(camelKafkaProperties);
      }
  
      @Override
      public String getBrokers(KafkaConfiguration configuration) {
          String brokers = (String) quarkusKafkaConfiguration.get(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG);
          return brokers != null ? brokers : super.getBrokers(configuration);
      }
  
      /**
       * Merges kafka configuration properties discovered by Quarkus with those provided via the
       * component & endpoint URI options. This behaviour can be suppressed via a configuration property.
       */
      public void mergeConfiguration(Properties camelKafkaProperties) {
          if (quarkusKafkaConfiguration != null) {
              for (Map.Entry<String, Object> entry : quarkusKafkaConfiguration.entrySet()) {
                  // Don't overwrite the group id if it has been set
                  if (entry.getKey().equals(ConsumerConfig.GROUP_ID_CONFIG)
                          && camelKafkaProperties.containsKey(ConsumerConfig.GROUP_ID_CONFIG)) {
                      continue;
                  }
                  camelKafkaProperties.put(entry.getKey(), entry.getValue());
              }
          }
      }
  }
  