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/**
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* Copyright 2018 Nikita Koksharov
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.redisson.codec;
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import java.io.IOException;
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import org.redisson.client.codec.BaseCodec;
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import org.redisson.client.codec.Codec;
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import org.redisson.client.handler.State;
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import org.redisson.client.protocol.Decoder;
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import org.redisson.client.protocol.Encoder;
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import org.xerial.snappy.SnappyInputStream;
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import org.xerial.snappy.SnappyOutputStream;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufAllocator;
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import io.netty.buffer.ByteBufInputStream;
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import io.netty.buffer.ByteBufOutputStream;
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/**
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* Google's Snappy compression codec.
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* Uses inner <code>Codec</code> to convert object to binary stream.
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* <code>FstCodec</code> used by default.
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* <p>
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* Based on <a href="https://github.com/xerial/snappy-java">https://github.com/xerial/snappy-java</a>
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*
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* @see org.redisson.codec.FstCodec
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*
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* @author Nikita Koksharov
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*
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*/
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public class SnappyCodecV2 extends BaseCodec {
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private final Codec innerCodec;
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public SnappyCodecV2() {
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this(new FstCodec());
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}
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public SnappyCodecV2(Codec innerCodec) {
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this.innerCodec = innerCodec;
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}
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public SnappyCodecV2(ClassLoader classLoader) {
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this(new FstCodec(classLoader));
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}
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private final Decoder<Object> decoder = new Decoder<Object>() {
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@Override
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public Object decode(ByteBuf buf, State state) throws IOException {
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SnappyInputStream input = new SnappyInputStream(new ByteBufInputStream(buf));
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ByteBuf bf = ByteBufAllocator.DEFAULT.buffer(buf.readableBytes());
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bf.writeBytes(input, buf.readableBytes());
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try {
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return innerCodec.getValueDecoder().decode(bf, state);
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} finally {
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bf.release();
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}
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}
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};
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private final Encoder encoder = new Encoder() {
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@Override
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public ByteBuf encode(Object in) throws IOException {
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ByteBuf encoded = innerCodec.getValueEncoder().encode(in);
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ByteBuf out = ByteBufAllocator.DEFAULT.buffer(encoded.readableBytes());
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try {
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SnappyOutputStream output = new SnappyOutputStream(new ByteBufOutputStream(out));
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encoded.readBytes(output, encoded.readableBytes());
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output.flush();
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} finally {
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encoded.release();
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}
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return out;
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}
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};
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@Override
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public Decoder<Object> getValueDecoder() {
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return decoder;
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}
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@Override
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public Encoder getValueEncoder() {
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return encoder;
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}
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}
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