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A wide-column store backed by Apache Kafka.

There is a newer version: 2.0.0

/*
 * 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 io.kstore.serialization;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
import com.esotericsoftware.kryo.util.Pool;
import org.apache.hadoop.hbase.util.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayOutputStream;
import java.util.TreeMap;

public class KryoUtils {
    private static final Logger log = LoggerFactory.getLogger(KryoUtils.class);

    // Pool constructor arguments: thread safe, soft references
    private static final Pool kryoPool = new Pool(true, true) {
        protected Kryo create() {
            Kryo kryo = new Kryo();
            // Configure the Kryo instance.
            kryo.register(byte[].class);
            kryo.register(Long.class);
            kryo.register(TreeMap.class);
            kryo.register(Bytes.ByteArrayComparator.class);
            return kryo;
        }
    };

    public static byte[] serialize(final Object obj) {
        Kryo kryo = kryoPool.obtain();
        try {
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            Output output = new Output(stream);
            kryo.writeClassAndObject(output, obj);
            output.close();
            return stream.toByteArray();
        } finally {
            kryoPool.free(kryo);
        }
    }

    @SuppressWarnings("unchecked")
    public static  V deserialize(final byte[] objectData) {
        Kryo kryo = kryoPool.obtain();
        try {
            Input input = new Input(objectData);
            return (V) kryo.readClassAndObject(input);
        } finally {
            kryoPool.free(kryo);
        }
    }
}