[Feature] Add zstd encoder (#11437)

Motivation:

As discussed in #10422, ZstdEncoder can be added separately

Modification:

Add ZstdEncoder separately

Result:

netty supports ZSTD with ZstdEncoder

Signed-off-by: xingrufei <xingrufei@sogou-inc.com>
Co-authored-by: xingrufei <xingrufei@sogou-inc.com>
This commit is contained in:
skyguard1 2021-07-06 20:57:09 +08:00 committed by GitHub
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7 changed files with 546 additions and 1 deletions

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@ -125,6 +125,14 @@ and decompression library, which can be obtained at:
* HOMEPAGE:
* https://github.com/jponge/lzma-java
This product optionally depends on 'zstd-jni', a zstd-jni Java compression
and decompression library, which can be obtained at:
* LICENSE:
* license/LICENSE.zstd-jni.txt (Apache License 2.0)
* HOMEPAGE:
* https://github.com/luben/zstd-jni
This product contains a modified portion of 'jfastlz', a Java port of FastLZ compression
and decompression library written by William Kinney. It can be obtained at:
@ -196,7 +204,7 @@ non-blocking XML processor, which can be obtained at:
* LICENSE:
* license/LICENSE.aalto-xml.txt (Apache License 2.0)
* HOMEPAGE:
* http://wiki.fasterxml.com/AaltoHome
* https://wiki.fasterxml.com/AaltoHome
This product contains a modified version of 'HPACK', a Java implementation of
the HTTP/2 HPACK algorithm written by Twitter. It can be obtained at:

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@ -83,6 +83,11 @@
<artifactId>lzma-java</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.github.luben</groupId>
<artifactId>zstd-jni</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.aayushatharva.brotli4j</groupId>
<artifactId>brotli4j</artifactId>

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@ -0,0 +1,32 @@
/*
* Copyright 2021 The Netty Project
*
* The Netty Project 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:
*
* https://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.netty.handler.codec.compression;
final class ZstdConstants {
static final int DEFAULT_COMPRESSION_LEVEL = 10;
/**
* Max block size
*/
static final int MAX_BLOCK_SIZE = 1 << DEFAULT_COMPRESSION_LEVEL + 0x0F; // 32 M
/**
* Default block size
*/
static final int DEFAULT_BLOCK_SIZE = 1 << 16; // 64 KB
private ZstdConstants() { }
}

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@ -0,0 +1,184 @@
/*
* Copyright 2021 The Netty Project
*
* The Netty Project 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:
*
* https://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.netty.handler.codec.compression;
import com.github.luben.zstd.Zstd;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.EncoderException;
import io.netty.handler.codec.MessageToByteEncoder;
import io.netty.util.internal.ObjectUtil;
import java.nio.ByteBuffer;
import static io.netty.handler.codec.compression.ZstdConstants.DEFAULT_COMPRESSION_LEVEL;
import static io.netty.handler.codec.compression.ZstdConstants.DEFAULT_BLOCK_SIZE;
import static io.netty.handler.codec.compression.ZstdConstants.MAX_BLOCK_SIZE;
/**
* Compresses a {@link ByteBuf} using the Zstandard algorithm.
* See <a href="https://facebook.github.io/zstd">Zstandard</a>.
*/
public final class ZstdEncoder extends MessageToByteEncoder<ByteBuf> {
private final int blockSize;
private final int compressionLevel;
private final int maxEncodeSize;
private ByteBuf buffer;
/**
* Creates a new Zstd encoder.
*
* Please note that if you use the default constructor, the default BLOCK_SIZE and MAX_BLOCK_SIZE
* will be used. If you want to specify BLOCK_SIZE and MAX_BLOCK_SIZE yourself,
* please use {@link ZstdEncoder(int,int)} constructor
*/
public ZstdEncoder() {
this(DEFAULT_COMPRESSION_LEVEL, DEFAULT_BLOCK_SIZE, MAX_BLOCK_SIZE);
}
/**
* Creates a new Zstd encoder.
* @param compressionLevel
* specifies the level of the compression
*/
public ZstdEncoder(int compressionLevel) {
this(compressionLevel, DEFAULT_BLOCK_SIZE, MAX_BLOCK_SIZE);
}
/**
* Creates a new Zstd encoder.
* @param blockSize
* is used to calculate the compressionLevel
* @param maxEncodeSize
* specifies the size of the largest compressed object
*/
public ZstdEncoder(int blockSize, int maxEncodeSize) {
this(DEFAULT_COMPRESSION_LEVEL, blockSize, maxEncodeSize);
}
/**
* @param blockSize
* is used to calculate the compressionLevel
* @param maxEncodeSize
* specifies the size of the largest compressed object
* @param compressionLevel
* specifies the level of the compression
*/
public ZstdEncoder(int compressionLevel, int blockSize, int maxEncodeSize) {
super(true);
this.compressionLevel = ObjectUtil.checkPositive(compressionLevel, "compressionLevel");
this.blockSize = ObjectUtil.checkPositive(blockSize, "blockSize");
this.maxEncodeSize = ObjectUtil.checkPositive(maxEncodeSize, "maxEncodeSize");
}
@Override
protected ByteBuf allocateBuffer(ChannelHandlerContext ctx, ByteBuf msg, boolean preferDirect) {
if (buffer == null) {
throw new IllegalStateException("not added to a pipeline," +
"or has been removed,buffer is null");
}
int remaining = msg.readableBytes() + buffer.readableBytes();
// quick overflow check
if (remaining < 0) {
throw new EncoderException("too much data to allocate a buffer for compression");
}
long bufferSize = 0;
while (remaining > 0) {
int curSize = Math.min(blockSize, remaining);
remaining -= curSize;
bufferSize += Zstd.compressBound(curSize);
}
if (bufferSize > maxEncodeSize || 0 > bufferSize) {
throw new EncoderException("requested encode buffer size (" + bufferSize + " bytes) exceeds " +
"the maximum allowable size (" + maxEncodeSize + " bytes)");
}
return ctx.alloc().directBuffer((int) bufferSize);
}
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) {
if (buffer == null) {
throw new IllegalStateException("not added to a pipeline," +
"or has been removed,buffer is null");
}
final ByteBuf buffer = this.buffer;
int length;
while ((length = in.readableBytes()) > 0) {
final int nextChunkSize = Math.min(length, buffer.writableBytes());
in.readBytes(buffer, nextChunkSize);
if (!buffer.isWritable()) {
flushBufferedData(out);
}
}
}
private void flushBufferedData(ByteBuf out) {
final int flushableBytes = buffer.readableBytes();
if (flushableBytes == 0) {
return;
}
final int bufSize = (int) Zstd.compressBound(flushableBytes);
out.ensureWritable(bufSize);
final int idx = out.writerIndex();
int compressedLength;
try {
ByteBuffer outNioBuffer = out.internalNioBuffer(idx, out.writableBytes());
compressedLength = Zstd.compress(
outNioBuffer,
buffer.internalNioBuffer(buffer.readerIndex(), flushableBytes),
compressionLevel);
} catch (Exception e) {
throw new CompressionException(e);
}
out.writerIndex(idx + compressedLength);
buffer.clear();
}
@Override
public void flush(final ChannelHandlerContext ctx) {
if (buffer != null && buffer.isReadable()) {
final ByteBuf buf = allocateBuffer(ctx, Unpooled.EMPTY_BUFFER, isPreferDirect());
flushBufferedData(buf);
ctx.write(buf);
}
ctx.flush();
}
@Override
public void handlerAdded(ChannelHandlerContext ctx) {
buffer = ctx.alloc().directBuffer(blockSize);
buffer.clear();
}
@Override
public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
super.handlerRemoved(ctx);
if (buffer != null) {
buffer.release();
buffer = null;
}
}
}

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@ -0,0 +1,108 @@
/*
* Copyright 2021 The Netty Project
*
* The Netty Project 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:
*
* https://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.netty.handler.codec.compression;
import com.github.luben.zstd.ZstdInputStream;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.ByteBufInputStream;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.embedded.EmbeddedChannel;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import java.io.InputStream;
import static org.mockito.Mockito.when;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class ZstdEncoderTest extends AbstractEncoderTest {
@Mock
private ChannelHandlerContext ctx;
@BeforeEach
public void setup() {
MockitoAnnotations.initMocks(this);
when(ctx.alloc()).thenReturn(ByteBufAllocator.DEFAULT);
}
@Override
public EmbeddedChannel createChannel() {
return new EmbeddedChannel(new ZstdEncoder());
}
@ParameterizedTest
@MethodSource("largeData")
public void testCompressionOfLargeBatchedFlow(final ByteBuf data) throws Exception {
final int dataLength = data.readableBytes();
int written = 0;
ByteBuf in = data.retainedSlice(written, 65535);
assertTrue(channel.writeOutbound(in));
ByteBuf in2 = data.retainedSlice(65535, dataLength - 65535);
assertTrue(channel.writeOutbound(in2));
assertTrue(channel.finish());
ByteBuf decompressed = readDecompressed(dataLength);
assertEquals(data, decompressed);
decompressed.release();
data.release();
}
@ParameterizedTest
@MethodSource("smallData")
public void testCompressionOfSmallBatchedFlow(final ByteBuf data) throws Exception {
testCompressionOfBatchedFlow(data);
}
@Override
protected ByteBuf decompress(ByteBuf compressed, int originalLength) throws Exception {
InputStream is = new ByteBufInputStream(compressed, true);
ZstdInputStream zstdIs = null;
byte[] decompressed = new byte[originalLength];
try {
zstdIs = new ZstdInputStream(is);
int remaining = originalLength;
while (remaining > 0) {
int read = zstdIs.read(decompressed, originalLength - remaining, remaining);
if (read > 0) {
remaining -= read;
} else {
break;
}
}
assertEquals(-1, zstdIs.read());
} finally {
if (zstdIs != null) {
zstdIs.close();
} else {
is.close();
}
}
return Unpooled.wrappedBuffer(decompressed);
}
}

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@ -0,0 +1,202 @@
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@ -677,6 +677,12 @@
<artifactId>lzma-java</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>com.github.luben</groupId>
<artifactId>zstd-jni</artifactId>
<version>1.5.0-2</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.aayushatharva.brotli4j</groupId>
<artifactId>brotli4j</artifactId>