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.kafka.clients.producer.internals;
  
  import org.apache.kafka.clients.producer.Callback;
  import org.apache.kafka.clients.producer.RecordMetadata;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.nio.charset.StandardCharsets;
  
  public class ErrorLoggingCallback implements Callback {
      private static final Logger log = LoggerFactory.getLogger(ErrorLoggingCallback.class);
      private final String topic;
      private final byte[] key;
      private final int valueLength;
      private final boolean logAsString;
      private byte[] value;
      public ErrorLoggingCallback(String topic, byte[] key, byte[] value, boolean logAsString) {
          this.topic = topic;
          this.key = key;
  
          if (logAsString) {
              this.value = value;
          }
  
          this.valueLength = value == null ? -1 : value.length;
          this.logAsString = logAsString;
      }
  
      public void onCompletion(RecordMetadata metadata, Exception e) {
          if (e != null) {
              String keyString = (key == null) ? "null" :
                      logAsString ? new String(key, StandardCharsets.UTF_8) : key.length + " bytes";
              String valueString = (valueLength == -1) ? "null" :
                      logAsString ? new String(value, StandardCharsets.UTF_8) : valueLength + " bytes";
              log.error("Error when sending message to topic {} with key: {}, value: {} with error:",
                      topic, keyString, valueString, e);
          }
      }
  }
  