com.impossibl.postgres.utils.StreamingByteBuf Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of pgjdbc-ng Show documentation
Show all versions of pgjdbc-ng Show documentation
PostgreSQL JDBC - NG - Driver
/**
* Copyright (c) 2013, impossibl.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of impossibl.com nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.impossibl.postgres.utils;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.InvalidMarkException;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
import io.netty.buffer.AbstractReferenceCountedByteBuf;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.DuplicatedByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
public class StreamingByteBuf extends AbstractReferenceCountedByteBuf {
private final ByteBufAllocator allocator;
private final ByteOrder endianness;
private ByteBuf buffer;
private Channel streamChannel;
private ChannelFuture lastStreamChannelWrite;
private int totalWritten;
public StreamingByteBuf(Channel streamChannel, int estimatedLength) {
this(streamChannel, ByteOrder.BIG_ENDIAN, estimatedLength);
}
public StreamingByteBuf(Channel streamChannel, ByteOrder endianness, int estimatedLength) {
this(streamChannel, endianness, estimatedLength, streamChannel.alloc());
}
public StreamingByteBuf(Channel streamChannel, ByteOrder endianness, int estimatedLength, ByteBufAllocator allocator) {
super(Integer.MAX_VALUE);
if (estimatedLength < 0) {
throw new IllegalArgumentException("estimatedLength: " + estimatedLength);
}
if (endianness == null) {
throw new NullPointerException("endianness");
}
if (allocator == null) {
throw new NullPointerException("allocator");
}
this.allocator = allocator;
this.endianness = endianness;
this.streamChannel = streamChannel;
buffer = allocator.buffer(estimatedLength).order(endianness);
}
public void flush() {
ensureWritable(buffer.capacity());
}
@Override
public ByteBuf resetReaderIndex() {
throw new InvalidMarkException();
}
@Override
public ByteBuf resetWriterIndex() {
throw new InvalidMarkException();
}
@Override
public ByteBuf unwrap() {
return buffer;
}
public int getTotalLength() {
return totalWritten + readableBytes();
}
@Override
public ByteBuf ensureWritable(int minWritableBytes) {
if (minWritableBytes > buffer.capacity()) {
throw new IllegalArgumentException("illegal write size");
}
if (minWritableBytes <= writableBytes()) {
return this;
}
if (lastStreamChannelWrite != null)
lastStreamChannelWrite.syncUninterruptibly();
totalWritten += readableBytes();
ByteBuf replacement = alloc().buffer(buffer.capacity()).order(order());
buffer.setIndex(readerIndex(), writerIndex());
lastStreamChannelWrite = streamChannel.writeAndFlush(buffer);
buffer = replacement;
clear();
return this;
}
@Override
public ByteBufAllocator alloc() {
return allocator;
}
@Override
public ByteOrder order() {
return endianness;
}
@Override
public boolean isDirect() {
return buffer.isDirect();
}
@Override
public int capacity() {
return buffer.capacity();
}
@Override
public boolean hasArray() {
return buffer.hasArray();
}
@Override
public byte[] array() {
return buffer.array();
}
@Override
public int arrayOffset() {
return buffer.arrayOffset();
}
@Override
public byte getByte(int index) {
return buffer.getByte(index);
}
@Override
public short getShort(int index) {
return buffer.getShort(index);
}
@Override
public int getUnsignedMedium(int index) {
return buffer.getUnsignedMedium(index);
}
@Override
public int getInt(int index) {
return buffer.getInt(index);
}
@Override
public long getLong(int index) {
return buffer.getLong(index);
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
buffer.getBytes(index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
buffer.getBytes(index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuffer dst) {
buffer.getBytes(index, dst);
return this;
}
@Override
public int getBytes(int index, GatheringByteChannel out, int length) throws IOException {
return buffer.getBytes(index, out, length);
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
buffer.getBytes(index, out, length);
return this;
}
@Override
public ByteBuf setByte(int index, int value) {
buffer.setByte(index, value);
return this;
}
@Override
public ByteBuf setShort(int index, int value) {
buffer.setShort(index, value);
return this;
}
@Override
public ByteBuf setMedium(int index, int value) {
buffer.setMedium(index, value);
return this;
}
@Override
public ByteBuf setInt(int index, int value) {
buffer.setInt(index, value);
return this;
}
@Override
public ByteBuf setLong(int index, long value) {
buffer.setLong(index, value);
return this;
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
buffer.setBytes(index, src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
buffer.setBytes(index, src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuffer src) {
buffer.setBytes(index, src);
return this;
}
@Override
public int setBytes(int index, InputStream in, int length) throws IOException {
return buffer.setBytes(index, in, length);
}
@Override
public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
return buffer.setBytes(index, in, length);
}
@Override
public ByteBuf writeByte(int value) {
ensureWritable(1);
super.writeByte(value);
return this;
}
@Override
public ByteBuf writeShort(int value) {
ensureWritable(2);
super.writeShort(value);
return this;
}
@Override
public ByteBuf writeMedium(int value) {
ensureWritable(3);
super.writeMedium(value);
return this;
}
@Override
public ByteBuf writeInt(int value) {
ensureWritable(4);
super.writeInt(value);
return this;
}
@Override
public ByteBuf writeLong(long value) {
ensureWritable(8);
super.writeLong(value);
return this;
}
@Override
public ByteBuf writeBytes(byte[] src, int srcIndex, int length) {
ensureWritable(length);
super.writeBytes(src, srcIndex, length);
return this;
}
@Override
public ByteBuf writeBytes(ByteBuf src, int srcIndex, int length) {
ensureWritable(length);
super.writeBytes(src, srcIndex, length);
return this;
}
@Override
public ByteBuf writeBytes(ByteBuffer src) {
ensureWritable(src.remaining());
super.writeBytes(src);
return this;
}
@Override
public int writeBytes(InputStream in, int length) throws IOException {
ensureWritable(length);
return super.writeBytes(in, length);
}
@Override
public int writeBytes(ScatteringByteChannel in, int length) throws IOException {
ensureWritable(length);
return super.writeBytes(in, length);
}
@Override
public ByteBuf writeZero(int length) {
ensureWritable(length);
super.writeZero(length);
return this;
}
@Override
public ByteBuf duplicate() {
return new DuplicatedByteBuf(this);
}
@Override
public ByteBuf copy(int index, int length) {
return null;
}
@Override
public ByteBuf slice(int index, int length) {
return null;
}
@Override
public ByteBuffer nioBuffer(int index, int length) {
return null;
}
@Override
protected byte _getByte(int index) {
return buffer.getByte(index);
}
@Override
protected short _getShort(int index) {
return buffer.getShort(index);
}
@Override
protected int _getUnsignedMedium(int index) {
return buffer.getUnsignedMedium(index);
}
@Override
protected int _getInt(int index) {
return buffer.getInt(index);
}
@Override
protected long _getLong(int index) {
return buffer.getLong(index);
}
@Override
protected void _setByte(int index, int value) {
buffer.setByte(index, value);
}
@Override
protected void _setShort(int index, int value) {
buffer.setShort(index, value);
}
@Override
protected void _setMedium(int index, int value) {
buffer.setMedium(index, value);
}
@Override
protected void _setInt(int index, int value) {
buffer.setInt(index, value);
}
@Override
protected void _setLong(int index, long value) {
buffer.setLong(index, value);
}
@Override
public ByteBuf capacity(int newCapacity) {
throw new UnsupportedOperationException();
}
@Override
public int nioBufferCount() {
return 0;
}
@Override
public ByteBuffer internalNioBuffer(int index, int length) {
throw new UnsupportedOperationException();
}
@Override
public ByteBuffer[] nioBuffers(int index, int length) {
throw new UnsupportedOperationException();
}
@Override
public boolean hasMemoryAddress() {
return false;
}
@Override
public long memoryAddress() {
throw new UnsupportedOperationException();
}
@Override
protected void deallocate() {
buffer.release();
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy