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/*
* 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 org.apache.dubbo.rpc.protocol.tri.compressor;
import org.apache.dubbo.rpc.RpcException;
import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream;
import org.apache.commons.io.output.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;
/**
* bzip2 compressor, faster compression efficiency
*
* @link https://commons.apache.org/proper/commons-compress/
*/
public class Bzip2 implements Compressor, DeCompressor {
public static final String BZIP2 = "bzip2";
@Override
public String getMessageEncoding() {
return BZIP2;
}
@Override
public byte[] compress(byte[] payloadByteArr) throws RpcException {
if (null == payloadByteArr || 0 == payloadByteArr.length) {
return new byte[0];
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
BZip2CompressorOutputStream cos;
try {
cos = new BZip2CompressorOutputStream(out);
cos.write(payloadByteArr);
cos.close();
} catch (Exception e) {
throw new IllegalStateException(e);
}
return out.toByteArray();
}
@Override
public byte[] decompress(byte[] payloadByteArr) {
if (null == payloadByteArr || 0 == payloadByteArr.length) {
return new byte[0];
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayInputStream in = new ByteArrayInputStream(payloadByteArr);
try {
BZip2CompressorInputStream unZip = new BZip2CompressorInputStream(in);
byte[] buffer = new byte[2048];
int n;
while ((n = unZip.read(buffer)) >= 0) {
out.write(buffer, 0, n);
}
} catch (Exception e) {
throw new IllegalStateException(e);
}
return out.toByteArray();
}
}