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 com.alibaba.jstorm.hdfs.avro;
  
  import backtype.storm.Config;
  import org.apache.avro.generic.GenericData;
  
  public class AvroUtils {
      /**
       * A helper method to extract avro serialization configurations from the topology configuration and register
       * specific kryo serializers as necessary.  A default serializer will be provided if none is specified in the
       * configuration.  "avro.serializer" should specify the complete class name of the serializer, e.g.
       * "org.apache.stgorm.hdfs.avro.GenericAvroSerializer"
       *
       * @param conf The topology configuration
       * @throws ClassNotFoundException If the specified serializer cannot be located.
       */
      public static void addAvroKryoSerializations(Config conf) throws ClassNotFoundException {
          final Class serializerClass;
          if (conf.containsKey("avro.serializer")) {
              serializerClass = Class.forName((String)conf.get("avro.serializer"));
          }
          else {
              serializerClass = GenericAvroSerializer.class;
          }
          conf.registerSerialization(GenericData.Record.class, serializerClass);
          conf.setSkipMissingKryoRegistrations(false);
      }
  }
  