HADOOP-10047. Add a direct-buffer based apis for compression. Contributed by Gopal V.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1543456 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
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@ -387,6 +387,9 @@ Release 2.3.0 - UNRELEASED
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HADOOP-9748. Reduce blocking on UGI.ensureInitialized (daryn)
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HADOOP-10047. Add a direct-buffer based apis for compression. (Gopal V via
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acmurthy)
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BUG FIXES
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HADOOP-9964. Fix deadlocks in TestHttpServer by synchronize
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@ -0,0 +1,69 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. 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.apache.hadoop.io.compress;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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@InterfaceAudience.Public
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@InterfaceStability.Evolving
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public interface DirectCompressor extends Compressor {
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/**
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* Example usage
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* <pre> {@code
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* private void compress(DirectCompressor comp, ByteBufferProducer in, ByteBufferConsumer out) throws IOException {
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* ByteBuffer outBB = ByteBuffer.allocateDirect(64*1024);
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* outBB.clear();
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* // returns inBB.remaining() > 0 || inBB == null
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* // if you do a inBB.put(), remember to do a inBB.flip()
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* ByteBuffer inBB = in.get();
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* while(!comp.finished()) {
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* comp.compress(outBB, inBB);
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* if(outBB.remaining() == 0) {
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* // flush when the buffer only when it is full
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* outBB.flip();
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* // has to consume the buffer, because it is reused
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* out.put(outBB);
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* outBB.clear();
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* }
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* if(inBB != null && inBB.remaining() == 0) {
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* inBB = in.get();
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* if(inBB == null) {
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* // EOF
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* comp.finish();
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* }
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* }
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* }
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*
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* if(outBB.position() > 0) {
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* outBB.flip();
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* out.put(outBB);
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* outBB.clear();
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* }
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* }
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* } </pre>
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* @param dst Destination {@link ByteBuffer} for storing the results into. Requires dst.remaining() to be > 0
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* @param src Source {@link ByteBuffer} for reading from. This can be null or src.remaining() > 0
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* @return bytes stored into dst
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* @throws IOException if compression fails
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*/
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public int compress(ByteBuffer dst, ByteBuffer src) throws IOException;
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}
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@ -0,0 +1,71 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. 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.apache.hadoop.io.compress;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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@InterfaceAudience.Public
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@InterfaceStability.Evolving
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public interface DirectDecompressor extends Decompressor {
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/**
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* Example usage
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*
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* <pre>{@code
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* private void decompress(DirectDecompressor decomp, ByteBufferProducer in, ByteBufferConsumer out) throws IOException {
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* ByteBuffer outBB = ByteBuffer.allocate(64*1024);
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* outBB.clear();
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* // returns inBB.remaining() > 0 || inBB == null
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* // if you do a inBB.put(), remember to do a inBB.flip()
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* ByteBuffer inBB = in.get();
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* if(inBB == null) {
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* // no data at all?
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* }
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* while(!decomp.finished()) {
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* decomp.decompress(outBB, inBB);
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* if(outBB.remaining() == 0) {
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* // flush when the buffer is full
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* outBB.flip();
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* // has to consume the buffer, because it is reused
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* out.put(outBB);
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* outBB.clear();
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* }
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* if(inBB != null && inBB.remaining() == 0) {
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* // inBB = null for EOF
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* inBB = in.get();
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* }
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* }
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*
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* if(outBB.position() > 0) {
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* outBB.flip();
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* out.put(outBB);
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* outBB.clear();
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* }
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* }
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* }</pre>
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* @param dst Destination {@link ByteBuffer} for storing the results into. Requires dst.remaining() to be > 0
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* @param src Source {@link ByteBuffer} for reading from. This can be null or src.remaining() > 0
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* @return bytes stored into dst (dst.postion += more)
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* @throws IOException if compression fails
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*/
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public int decompress(ByteBuffer dst, ByteBuffer src) throws IOException;
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}
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@ -24,6 +24,7 @@
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.io.compress.Compressor;
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import org.apache.hadoop.io.compress.DirectCompressor;
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import org.apache.hadoop.util.NativeCodeLoader;
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import org.apache.commons.logging.Log;
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@ -35,7 +36,7 @@
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* http://www.zlib.net/
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*
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*/
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public class ZlibCompressor implements Compressor {
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public class ZlibCompressor implements Compressor,DirectCompressor {
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private static final Log LOG = LogFactory.getLog(ZlibCompressor.class);
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@ -420,6 +421,7 @@ public synchronized void reset() {
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compressedDirectBuf.limit(directBufferSize);
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compressedDirectBuf.position(directBufferSize);
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userBufOff = userBufLen = 0;
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userBuf = null;
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}
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@Override
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@ -435,6 +437,110 @@ private void checkStream() {
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throw new NullPointerException();
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}
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private int put(ByteBuffer dst, ByteBuffer src) {
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// this will lop off data from src[pos:limit] into dst[pos:limit]
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int l1 = src.remaining();
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int l2 = dst.remaining();
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int pos1 = src.position();
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int pos2 = dst.position();
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int len = Math.min(l1, l2);
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if (len == 0) {
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return 0;
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}
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ByteBuffer slice = src.slice();
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slice.limit(len);
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dst.put(slice);
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src.position(pos1 + len);
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return len;
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}
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public int compress(ByteBuffer dst, ByteBuffer src) throws IOException {
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assert dst.remaining() > 0 : "dst.remaining() == 0";
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int n = 0;
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/* fast path for clean state and direct buffers */
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/* TODO: reset should free userBuf? */
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if((src != null && src.isDirect()) && dst.isDirect() && userBuf == null) {
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/*
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* TODO: fix these assumptions in inflateDirect(), eventually by allowing
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* it to read position()/limit() directly
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*/
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boolean cleanDst = (dst.position() == 0 && dst.remaining() == dst.capacity() && dst.capacity() >= directBufferSize);
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boolean cleanState = (keepUncompressedBuf == false && uncompressedDirectBufLen == 0 && compressedDirectBuf.remaining() == 0);
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/* use the buffers directly */
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if(cleanDst && cleanState) {
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Buffer originalCompressed = compressedDirectBuf;
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Buffer originalUncompressed = uncompressedDirectBuf;
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int originalBufferSize = directBufferSize;
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uncompressedDirectBuf = src;
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uncompressedDirectBufOff = src.position();
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uncompressedDirectBufLen = src.remaining();
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compressedDirectBuf = dst;
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directBufferSize = dst.remaining();
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// Compress data
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n = deflateBytesDirect();
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// we move dst.position() forward, not limit()
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// unlike the local buffer case, which moves it when we put() into the dst
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dst.position(n);
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if(uncompressedDirectBufLen > 0) {
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src.position(uncompressedDirectBufOff);
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} else {
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src.position(src.limit());
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}
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compressedDirectBuf = originalCompressed;
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uncompressedDirectBuf = originalUncompressed;
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uncompressedDirectBufOff = 0;
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uncompressedDirectBufLen = 0;
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directBufferSize = originalBufferSize;
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return n;
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}
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}
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// Check if there is compressed data
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if (compressedDirectBuf.remaining() > 0) {
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n = put(dst, (ByteBuffer) compressedDirectBuf);
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}
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if (dst.remaining() == 0) {
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return n;
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} else {
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needsInput();
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// if we have drained userBuf, read from src (ideally, do not mix buffer
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// modes, but sometimes you can)
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if (userBufLen == 0 && src != null && src.remaining() > 0) {
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put((ByteBuffer) uncompressedDirectBuf, src);
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uncompressedDirectBufLen = uncompressedDirectBuf.position();
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}
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// Re-initialize the zlib's output direct buffer
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compressedDirectBuf.rewind();
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compressedDirectBuf.limit(directBufferSize);
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// Compress data
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int more = deflateBytesDirect();
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compressedDirectBuf.limit(more);
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// Check if zlib consumed all input buffer
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// set keepUncompressedBuf properly
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if (uncompressedDirectBufLen <= 0) { // zlib consumed all input buffer
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keepUncompressedBuf = false;
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uncompressedDirectBuf.clear();
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uncompressedDirectBufOff = 0;
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uncompressedDirectBufLen = 0;
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} else { // zlib did not consume all input buffer
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keepUncompressedBuf = true;
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}
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// fill the dst buffer from compressedDirectBuf
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int fill = put(dst, ((ByteBuffer) compressedDirectBuf));
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return n + fill;
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}
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}
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private native static void initIDs();
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private native static long init(int level, int strategy, int windowBits);
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private native static void setDictionary(long strm, byte[] b, int off,
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import java.nio.ByteBuffer;
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import org.apache.hadoop.io.compress.Decompressor;
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import org.apache.hadoop.io.compress.DirectDecompressor;
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import org.apache.hadoop.util.NativeCodeLoader;
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/**
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@ -31,7 +32,7 @@
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* http://www.zlib.net/
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*
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*/
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public class ZlibDecompressor implements Decompressor {
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public class ZlibDecompressor implements Decompressor,DirectDecompressor {
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private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64*1024;
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// HACK - Use this as a global lock in the JNI layer
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@ -280,6 +281,7 @@ public synchronized void reset() {
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uncompressedDirectBuf.limit(directBufferSize);
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uncompressedDirectBuf.position(directBufferSize);
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userBufOff = userBufLen = 0;
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userBuf = null;
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}
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@Override
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@ -299,6 +301,108 @@ private void checkStream() {
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if (stream == 0)
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throw new NullPointerException();
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}
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private int put(ByteBuffer dst, ByteBuffer src) {
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// this will lop off data from src[pos:limit] into dst[pos:limit], using the
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// min() of both remaining()
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int l1 = src.remaining();
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int l2 = dst.remaining();
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int pos1 = src.position();
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int pos2 = dst.position();
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int len = Math.min(l1, l2);
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if (len == 0) {
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return 0;
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}
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ByteBuffer slice = src.slice();
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slice.limit(len);
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dst.put(slice);
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src.position(pos1 + len);
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return len;
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}
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public int decompress(ByteBuffer dst, ByteBuffer src) throws IOException {
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assert dst.remaining() > 0 : "dst.remaining == 0";
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int n = 0;
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/* fast path for clean state and direct buffers */
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if((src != null && src.isDirect()) && dst.isDirect() && userBuf == null) {
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/*
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* TODO: fix these assumptions in inflateDirect(), eventually by allowing
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* it to read position()/limit() directly
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*/
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boolean cleanDst = (dst.position() == 0 && dst.remaining() == dst.capacity() && dst.remaining() >= directBufferSize);
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boolean cleanState = (compressedDirectBufLen == 0 && uncompressedDirectBuf.remaining() == 0);
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/* use the buffers directly */
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if(cleanDst && cleanState) {
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Buffer originalCompressed = compressedDirectBuf;
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Buffer originalUncompressed = uncompressedDirectBuf;
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int originalBufferSize = directBufferSize;
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compressedDirectBuf = src;
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compressedDirectBufOff = src.position();
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compressedDirectBufLen = src.remaining();
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uncompressedDirectBuf = dst;
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directBufferSize = dst.remaining();
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// Compress data
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n = inflateBytesDirect();
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dst.position(n);
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if(compressedDirectBufLen > 0) {
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src.position(compressedDirectBufOff);
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} else {
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src.position(src.limit());
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}
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compressedDirectBuf = originalCompressed;
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uncompressedDirectBuf = originalUncompressed;
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compressedDirectBufOff = 0;
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compressedDirectBufLen = 0;
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directBufferSize = originalBufferSize;
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return n;
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}
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}
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// Check if there is compressed data
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if (uncompressedDirectBuf.remaining() > 0) {
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n = put(dst, (ByteBuffer) uncompressedDirectBuf);
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}
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if (dst.remaining() == 0) {
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return n;
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} else {
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if (needsInput()) {
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// this does not update buffers if we have no userBuf
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if (userBufLen <= 0) {
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compressedDirectBufOff = 0;
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compressedDirectBufLen = 0;
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compressedDirectBuf.rewind().limit(directBufferSize);
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}
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if (src != null) {
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assert src.remaining() > 0 : "src.remaining() == 0";
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}
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}
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// if we have drained userBuf, read from src (ideally, do not mix buffer
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// modes, but sometimes you can)
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if (userBufLen == 0 && src != null && src.remaining() > 0) {
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compressedDirectBufLen += put(((ByteBuffer) compressedDirectBuf), src);
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}
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// Re-initialize the zlib's output direct buffer
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uncompressedDirectBuf.rewind();
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uncompressedDirectBuf.limit(directBufferSize);
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// Compress data
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int more = inflateBytesDirect();
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uncompressedDirectBuf.limit(more);
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// Get atmost 'len' bytes
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int fill = put(dst, ((ByteBuffer) uncompressedDirectBuf));
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return n + fill;
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}
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}
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private native static void initIDs();
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private native static long init(int windowBits);
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@ -19,8 +19,13 @@
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import static org.junit.Assert.*;
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import static org.junit.Assume.*;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.Console;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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import java.util.Random;
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import org.apache.hadoop.conf.Configuration;
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@ -33,8 +38,12 @@
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import org.apache.hadoop.io.compress.CompressDecompressTester.CompressionTestStrategy;
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import org.apache.hadoop.io.compress.zlib.ZlibCompressor.CompressionLevel;
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import org.apache.hadoop.io.compress.zlib.ZlibCompressor.CompressionStrategy;
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import org.apache.log4j.ConsoleAppender;
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import org.junit.Before;
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import org.junit.Test;
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import sun.util.logging.resources.logging;
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import com.google.common.collect.ImmutableSet;
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public class TestZlibCompressorDecompressor {
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@ -150,6 +159,149 @@ public void testZlibCompressDecompress() {
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}
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}
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private void compressDecompressLoop(int rawDataSize, int inSize, int outSize)
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throws IOException {
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byte[] rawData = null;
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rawData = generate(rawDataSize);
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ByteBuffer inBuf = ByteBuffer.allocateDirect(inSize);
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ByteBuffer outBuf = ByteBuffer.allocateDirect(outSize);
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ZlibCompressor compressor = new ZlibCompressor();
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ZlibDecompressor decompressor = new ZlibDecompressor();
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outBuf.clear();
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/* compression loop */
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int off = 0;
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int len = rawDataSize;
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int min = Math.min(inBuf.remaining(), len);
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if (min > 0) {
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inBuf.put(rawData, off, min);
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}
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inBuf.flip();
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len -= min;
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off += min;
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while (!compressor.finished()) {
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compressor.compress(outBuf, inBuf);
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if (outBuf.remaining() == 0) {
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// flush when the buffer is full
|
||||
outBuf.flip();
|
||||
while (outBuf.remaining() > 0) {
|
||||
baos.write(outBuf.get());
|
||||
}
|
||||
outBuf.clear();
|
||||
}
|
||||
if (inBuf != null && inBuf.remaining() == 0) {
|
||||
inBuf.clear();
|
||||
if (len > 0) {
|
||||
min = Math.min(inBuf.remaining(), len);
|
||||
inBuf.put(rawData, off, min);
|
||||
inBuf.flip();
|
||||
len -= min;
|
||||
off += min;
|
||||
} else {
|
||||
inBuf = null;
|
||||
compressor.finish();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
outBuf.flip();
|
||||
if (outBuf.remaining() > 0) {
|
||||
while (outBuf.remaining() > 0) {
|
||||
baos.write(outBuf.get());
|
||||
}
|
||||
outBuf.clear();
|
||||
}
|
||||
|
||||
compressor.end();
|
||||
|
||||
byte[] compressed = baos.toByteArray();
|
||||
ByteBuffer expected = ByteBuffer.wrap(rawData);
|
||||
outBuf.clear();
|
||||
inBuf = ByteBuffer.allocateDirect(inSize);
|
||||
inBuf.clear();
|
||||
|
||||
// zlib always has header
|
||||
if (compressed.length != 0) {
|
||||
off = 0;
|
||||
len = compressed.length;
|
||||
min = Math.min(inBuf.remaining(), len);
|
||||
inBuf.put(compressed, off, min);
|
||||
inBuf.flip();
|
||||
len -= min;
|
||||
off += min;
|
||||
while (!decompressor.finished()) {
|
||||
decompressor.decompress(outBuf, inBuf);
|
||||
if (outBuf.remaining() == 0) {
|
||||
outBuf.flip();
|
||||
while (outBuf.remaining() > 0) {
|
||||
assertEquals(expected.get(), outBuf.get());
|
||||
}
|
||||
outBuf.clear();
|
||||
}
|
||||
|
||||
if (inBuf != null && inBuf.remaining() == 0) {
|
||||
inBuf.clear();
|
||||
if (len > 0) {
|
||||
min = Math.min(inBuf.remaining(), len);
|
||||
inBuf.put(compressed, off, min);
|
||||
inBuf.flip();
|
||||
len -= min;
|
||||
off += min;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
outBuf.flip();
|
||||
if (outBuf.remaining() > 0) {
|
||||
while (outBuf.remaining() > 0) {
|
||||
assertEquals(expected.get(), outBuf.get());
|
||||
}
|
||||
outBuf.clear();
|
||||
}
|
||||
|
||||
assertEquals(0, expected.remaining());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testZlibDirectCompressDecompress() {
|
||||
int[] size = { 4, 16, 4 * 1024, 64 * 1024, 128 * 1024, 256 * 1024,
|
||||
1024 * 1024 };
|
||||
try {
|
||||
// 0-2 bytes results in sizeof(outBuf) > sizeof(inBuf)
|
||||
compressDecompressLoop(0, 4096, 4096);
|
||||
compressDecompressLoop(0, 1, 1);
|
||||
compressDecompressLoop(1, 1, 2);
|
||||
compressDecompressLoop(1, 2, 1);
|
||||
compressDecompressLoop(2, 3, 2);
|
||||
|
||||
for (int i = 0; i < size.length; i++) {
|
||||
compressDecompressLoop(size[i], 4096, 4096);
|
||||
compressDecompressLoop(size[i], 1, 1);
|
||||
compressDecompressLoop(size[i], 1, 2);
|
||||
compressDecompressLoop(size[i], 2, 1);
|
||||
compressDecompressLoop(size[i], 3, 2);
|
||||
compressDecompressLoop(size[i], size[i], 4096);
|
||||
compressDecompressLoop(size[i], size[i] - 1, 4096);
|
||||
compressDecompressLoop(size[i], size[i] + 1, 4096);
|
||||
compressDecompressLoop(size[i], 4096, size[i]);
|
||||
compressDecompressLoop(size[i], 4096, size[i] - 1);
|
||||
compressDecompressLoop(size[i], 4096, size[i] + 1);
|
||||
compressDecompressLoop(size[i], size[i] - 1, size[i] - 1);
|
||||
|
||||
compressDecompressLoop(size[i], size[i] / 2, 4096);
|
||||
compressDecompressLoop(size[i], size[i] / 2 - 1, 4096);
|
||||
compressDecompressLoop(size[i], size[i] / 2 + 1, 4096);
|
||||
compressDecompressLoop(size[i], 4096, size[i] / 2);
|
||||
compressDecompressLoop(size[i], 4096, size[i] / 2 - 1);
|
||||
compressDecompressLoop(size[i], 4096, size[i] / 2 + 1);
|
||||
compressDecompressLoop(size[i], size[i] / 2 - 1, size[i] / 2 - 1);
|
||||
}
|
||||
} catch (IOException ex) {
|
||||
fail("testZlibDirectCompressDecompress ex !!!" + ex);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testZlibCompressorDecompressorSetDictionary() {
|
||||
Configuration conf = new Configuration();
|
||||
|
Loading…
Reference in New Issue
Block a user