/*
* Copyright 2013 the original author or authors.
*
* 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.springframework.xd.dirt.integration.redis;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.support.GenericMessage;
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
import org.objenesis.strategy.StdInstantiatorStrategy;
/**
* A Redis Serializer that uses Kryo serialization
*
* @author David Turanski
* @since 1.0
*/
public class KryoMessageSerializer implements RedisSerializer<Message<?>> {
@Override
public byte[] serialize(Message<?> message) throws SerializationException {
Kryo kryo = kryoInstance();
Output output = new Output(2048, -1);
kryo.writeObjectOrNull(output, message, GenericMessage.class);
return output.getBuffer();
}
@Override
public Message<?> deserialize(byte[] bytes) throws SerializationException {
if (bytes == null) {
return null;
}
Kryo kryo = kryoInstance();
Input input = new Input(bytes);
return kryo.readObjectOrNull(input, GenericMessage.class);
}
private Kryo kryoInstance() {
Kryo kryo = new Kryo();
kryo.register(MessageHeaders.class, new KryoMessageHeadersSerializer());
kryo.setInstantiatorStrategy(new StdInstantiatorStrategy());
return kryo;
}
}