jstorm-core/src/main/java/backtype/storm/serialization/DefaultKryoFactory.java

/**
 * 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 backtype.storm.serialization;

import backtype.storm.Config;
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import java.util.Map;

public class DefaultKryoFactory implements IKryoFactory {

    public static class KryoSerializableDefault extends Kryo {
        boolean _override = false;

        public void overrideDefault(boolean value) {
            _override = value;
        }

        @Override
        public Serializer getDefaultSerializer(Class type) {
            if (_override) {
                return new SerializableSerializer();
            } else {
                return super.getDefaultSerializer(type);
            }
        }
    }

    @Override
    public Kryo getKryo(Map conf) {
        KryoSerializableDefault k = new KryoSerializableDefault();
        k.setRegistrationRequired((Boolean) conf.get(Config.TOPOLOGY_KRYO_REGISTER_REQUIRED));
        k.setReferences(false);
        return k;
    }

    @Override
    public void preRegister(Kryo k, Map conf) {
    }

    public void postRegister(Kryo k, Map conf) {
        ((KryoSerializableDefault) k).overrideDefault((Boolean) conf.get(Config.TOPOLOGY_FALL_BACK_ON_JAVA_SERIALIZATION));
    }

    @Override
    public void postDecorate(Kryo k, Map conf) {
    }
}