FstCodec.java

/**
 * Copyright 2016 Nikita Koksharov
 *
 * 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.redisson.codec;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import org.nustaq.serialization.FSTConfiguration;
import org.nustaq.serialization.FSTObjectInput;
import org.nustaq.serialization.FSTObjectOutput;
import org.redisson.client.codec.Codec;
import org.redisson.client.handler.State;
import org.redisson.client.protocol.Decoder;
import org.redisson.client.protocol.Encoder;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufInputStream;

/**
 * Efficient and speedy serialization codec fully
 * compatible with JDK Serialization codec.
 *
 * https://github.com/RuedigerMoeller/fast-serialization
 *
 * @author Nikita Koksharov
 *
 */
public class FstCodec implements Codec {

    private final FSTConfiguration config;

    public FstCodec() {
        this(FSTConfiguration.createDefaultConfiguration());
    }
    
    public FstCodec(ClassLoader classLoader) {
        this(createConfig(classLoader));
    }

    private static FSTConfiguration createConfig(ClassLoader classLoader) {
        FSTConfiguration def = FSTConfiguration.createDefaultConfiguration();
        def.setClassLoader(classLoader);
        return def;
    }

    public FstCodec(FSTConfiguration fstConfiguration) {
        config = fstConfiguration;
    }

    private final Decoder<Object> decoder = new Decoder<Object>() {
        @Override
        public Object decode(ByteBuf buf, State state) throws IOException {
            try {
                ByteBufInputStream in = new ByteBufInputStream(buf);
                FSTObjectInput inputStream = config.getObjectInput(in);
                return inputStream.readObject();
            } catch (IOException e) {
                throw e;
            } catch (Exception e) {
                throw new IOException(e);
            }
        }
    };

    private final Encoder encoder = new Encoder() {

        @Override
        public byte[] encode(Object in) throws IOException {
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            FSTObjectOutput oos = config.getObjectOutput(os);
            oos.writeObject(in);
            oos.flush();
            return os.toByteArray();
        }
    };

    @Override
    public Decoder<Object> getMapValueDecoder() {
        return getValueDecoder();
    }

    @Override
    public Encoder getMapValueEncoder() {
        return getValueEncoder();
    }

    @Override
    public Decoder<Object> getMapKeyDecoder() {
        return getValueDecoder();
    }

    @Override
    public Encoder getMapKeyEncoder() {
        return getValueEncoder();
    }

    @Override
    public Decoder<Object> getValueDecoder() {
        return decoder;
    }

    @Override
    public Encoder getValueEncoder() {
        return encoder;
    }

}