code: /*
   * Copyright 2019 Mitsunori Komatsu (komamitsu)
   *
   * Licensed 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.komamitsu.fluency;
  
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import org.komamitsu.fluency.recordformat.AbstractRecordFormatter;
  
  import java.nio.ByteBuffer;
  import java.util.Map;
  
  public class JsonRecordFormatter
          extends AbstractRecordFormatter
  {
      private ObjectMapper objectMapper = new ObjectMapper();
  
      public JsonRecordFormatter()
      {
          super(new Config());
      }
  
      @Override
      public byte[] format(String tag, Object timestamp, Map<String, Object> data)
      {
          try {
              return objectMapper.writeValueAsBytes(data);
          }
          catch (JsonProcessingException e) {
              throw new RuntimeException(e);
          }
      }
  
      @Override
      public byte[] formatFromMessagePack(String tag, Object timestamp, byte[] mapValue, int offset, int len)
      {
          throw new RuntimeException("Shouldn't be called");
      }
  
      @Override
      public byte[] formatFromMessagePack(String tag, Object timestamp, ByteBuffer mapValue)
      {
          throw new RuntimeException("Shouldn't be called");
      }
  
      @Override
      public String formatName()
      {
          return "json";
      }
  }
  