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.component.kafka;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.support.SynchronizationAdapter;
  import org.apache.kafka.clients.producer.Producer;
  import org.apache.kafka.common.KafkaException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  class KafkaTransactionSynchronization extends SynchronizationAdapter {
      private static final Logger LOG = LoggerFactory.getLogger(KafkaTransactionSynchronization.class);
      private final String transactionId;
      private final Producer kafkaProducer;
  
      public KafkaTransactionSynchronization(String transactionId, Producer kafkaProducer) {
          this.transactionId = transactionId;
          this.kafkaProducer = kafkaProducer;
      }
  
      @Override
      public void onDone(Exchange exchange) {
          try {
              if (exchange.getException() != null || exchange.isRollbackOnly()) {
                  if (exchange.getException() instanceof KafkaException) {
                      LOG.warn("Catch {} and will close kafka producer with transaction {} ", exchange.getException(),
                              transactionId);
                      kafkaProducer.close();
                  } else {
                      LOG.warn("Abort kafka transaction {} with exchange {}", transactionId, exchange.getExchangeId());
                      kafkaProducer.abortTransaction();
                  }
              } else {
                  LOG.debug("Commit kafka transaction {} with exchange {}", transactionId, exchange.getExchangeId());
                  kafkaProducer.commitTransaction();
              }
          } catch (KafkaException e) {
              exchange.setException(e);
          } catch (Exception e) {
              exchange.setException(e);
              LOG.warn("Abort kafka transaction {} with exchange {} due to {} ", transactionId, exchange.getExchangeId(),
                      e.getMessage(), e);
              kafkaProducer.abortTransaction();
          } finally {
              exchange.getUnitOfWork().endTransactedBy(transactionId);
          }
      }
  }
  