com.alibaba.dubbo.remoting.buffer

Class DynamicChannelBuffer

java.lang.Object

com.alibaba.dubbo.remoting.buffer.AbstractChannelBuffer

com.alibaba.dubbo.remoting.buffer.DynamicChannelBuffer

All Implemented Interfaces:

ChannelBuffer, Comparable<ChannelBuffer>

public class DynamicChannelBuffer
extends AbstractChannelBuffer

Constructor Summary

Constructors

Constructor and Description
DynamicChannelBuffer(int estimatedLength)
DynamicChannelBuffer(int estimatedLength, ChannelBufferFactory factory)

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	array() Returns the backing byte array of this buffer.
int	arrayOffset() Returns the offset of the first byte within the backing byte array of this buffer.
int	capacity() Returns the number of bytes (octets) this buffer can contain.
ChannelBuffer	copy(int index, int length) Returns a copy of this buffer's sub-region.
void	ensureWritableBytes(int minWritableBytes) Makes sure the number of the writable bytes is equal to or greater than the specified value.
ChannelBufferFactory	factory() Returns the factory which creates a ChannelBuffer whose type and default ByteOrder are same with this buffer.
byte	getByte(int index) Gets a byte at the specified absolute index in this buffer.
void	getBytes(int index, byte[] dst, int dstIndex, int length) Transfers this buffer's data to the specified destination starting at the specified absolute index.
void	getBytes(int index, ByteBuffer dst) Transfers this buffer's data to the specified destination starting at the specified absolute index until the destination's position reaches its limit.
void	getBytes(int index, ChannelBuffer dst, int dstIndex, int length) Transfers this buffer's data to the specified destination starting at the specified absolute index.
void	getBytes(int index, OutputStream dst, int length) Transfers this buffer's data to the specified stream starting at the specified absolute index.
boolean	hasArray() Returns true if and only if this buffer has a backing byte array.
boolean	isDirect() Returns true if and only if this buffer is backed by an NIO direct buffer.
void	setByte(int index, int value) Sets the specified byte at the specified absolute index in this buffer.
void	setBytes(int index, byte[] src, int srcIndex, int length) Transfers the specified source array's data to this buffer starting at the specified absolute index.
void	setBytes(int index, ByteBuffer src) Transfers the specified source buffer's data to this buffer starting at the specified absolute index until the source buffer's position reaches its limit.
void	setBytes(int index, ChannelBuffer src, int srcIndex, int length) Transfers the specified source buffer's data to this buffer starting at the specified absolute index.
int	setBytes(int index, InputStream src, int length) Transfers the content of the specified source stream to this buffer starting at the specified absolute index.
ByteBuffer	toByteBuffer(int index, int length) Converts this buffer's sub-region into a NIO buffer.
void	writeByte(int value) Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer.
void	writeBytes(byte[] src, int srcIndex, int length) Transfers the specified source array's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).
void	writeBytes(ByteBuffer src) Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer's position reaches its limit, and increases the writerIndex by the number of the transferred bytes.
void	writeBytes(ChannelBuffer src, int srcIndex, int length) Transfers the specified source buffer's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).
int	writeBytes(InputStream in, int length) Transfers the content of the specified stream to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes.

Methods inherited from class com.alibaba.dubbo.remoting.buffer.AbstractChannelBuffer

clear, compareTo, copy, discardReadBytes, equals, getBytes, getBytes, getBytes, markReaderIndex, markWriterIndex, readable, readableBytes, readByte, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readerIndex, readerIndex, resetReaderIndex, resetWriterIndex, setBytes, setBytes, setBytes, setIndex, skipBytes, toByteBuffer, toString, writable, writableBytes, writeBytes, writeBytes, writeBytes, writerIndex, writerIndex

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DynamicChannelBuffer

public DynamicChannelBuffer(int estimatedLength)

DynamicChannelBuffer

public DynamicChannelBuffer(int estimatedLength,
                    ChannelBufferFactory factory)

Method Detail

ensureWritableBytes

public void ensureWritableBytes(int minWritableBytes)

Description copied from interface: ChannelBuffer

Makes sure the number of the writable bytes is equal to or greater than the specified value. If there is enough writable bytes in this buffer, this method returns with no side effect. Otherwise:

• a non-dynamic buffer will throw an IndexOutOfBoundsException.
• a dynamic buffer will expand its capacity so that the number of the writable bytes becomes equal to or greater than the specified value. The expansion involves the reallocation of the internal buffer and consequently memory copy.

Specified by:

ensureWritableBytes in interface ChannelBuffer

Overrides:

ensureWritableBytes in class AbstractChannelBuffer

Parameters:

minWritableBytes - the expected minimum number of writable bytes

capacity

public int capacity()

Description copied from interface: ChannelBuffer

Returns the number of bytes (octets) this buffer can contain.

copy

public ChannelBuffer copy(int index,
                 int length)

Description copied from interface: ChannelBuffer

Returns a copy of this buffer's sub-region. Modifying the content of the returned buffer or this buffer does not affect each other at all. This method does not modify readerIndex or writerIndex of this buffer.

factory

public ChannelBufferFactory factory()

Description copied from interface: ChannelBuffer

Returns the factory which creates a ChannelBuffer whose type and default ByteOrder are same with this buffer.

getByte

public byte getByte(int index)

Description copied from interface: ChannelBuffer

Gets a byte at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.

getBytes

public void getBytes(int index,
            byte[] dst,
            int dstIndex,
            int length)

Description copied from interface: ChannelBuffer

Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

dstIndex - the first index of the destination

length - the number of bytes to transfer

getBytes

public void getBytes(int index,
            ByteBuffer dst)

Description copied from interface: ChannelBuffer

Transfers this buffer's data to the specified destination starting at the specified absolute index until the destination's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer while the destination's position will be increased.

getBytes

public void getBytes(int index,
            ChannelBuffer dst,
            int dstIndex,
            int length)

Description copied from interface: ChannelBuffer

Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.

dstIndex - the first index of the destination

length - the number of bytes to transfer

getBytes

public void getBytes(int index,
            OutputStream dst,
            int length)
              throws IOException

Description copied from interface: ChannelBuffer

Transfers this buffer's data to the specified stream starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

length - the number of bytes to transfer

Throws:

IOException - if the specified stream threw an exception during I/O

isDirect

public boolean isDirect()

Description copied from interface: ChannelBuffer

Returns true if and only if this buffer is backed by an NIO direct buffer.

setByte

public void setByte(int index,
           int value)

Description copied from interface: ChannelBuffer

Sets the specified byte at the specified absolute index in this buffer. The 24 high-order bits of the specified value are ignored. This method does not modify readerIndex or writerIndex of this buffer.

setBytes

public void setBytes(int index,
            byte[] src,
            int srcIndex,
            int length)

Description copied from interface: ChannelBuffer

Transfers the specified source array's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

setBytes

public void setBytes(int index,
            ByteBuffer src)

Description copied from interface: ChannelBuffer

Transfers the specified source buffer's data to this buffer starting at the specified absolute index until the source buffer's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer.

setBytes

public void setBytes(int index,
            ChannelBuffer src,
            int srcIndex,
            int length)

Description copied from interface: ChannelBuffer

Transfers the specified source buffer's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.

srcIndex - the first index of the source

length - the number of bytes to transfer

setBytes

public int setBytes(int index,
           InputStream src,
           int length)
             throws IOException

Description copied from interface: ChannelBuffer

Transfers the content of the specified source stream to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

length - the number of bytes to transfer

Returns:

the actual number of bytes read in from the specified channel. -1 if the specified channel is closed.

Throws:

IOException - if the specified stream threw an exception during I/O

toByteBuffer

public ByteBuffer toByteBuffer(int index,
                      int length)

Description copied from interface: ChannelBuffer

Converts this buffer's sub-region into a NIO buffer. The returned buffer might or might not share the content with this buffer, while they have separate indexes and marks. This method does not modify readerIndex or writerIndex of this buffer.

writeByte

public void writeByte(int value)

Description copied from interface: ChannelBuffer

Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer. The 24 high-order bits of the specified value are ignored.

Specified by:

writeByte in interface ChannelBuffer

Overrides:

writeByte in class AbstractChannelBuffer

writeBytes

public void writeBytes(byte[] src,
              int srcIndex,
              int length)

Description copied from interface: ChannelBuffer

Transfers the specified source array's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).

Specified by:

writeBytes in interface ChannelBuffer

Overrides:

writeBytes in class AbstractChannelBuffer

srcIndex - the first index of the source

length - the number of bytes to transfer

writeBytes

public void writeBytes(ChannelBuffer src,
              int srcIndex,
              int length)

Description copied from interface: ChannelBuffer

Transfers the specified source buffer's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).

Specified by:

writeBytes in interface ChannelBuffer

Overrides:

writeBytes in class AbstractChannelBuffer

srcIndex - the first index of the source

length - the number of bytes to transfer

writeBytes

public void writeBytes(ByteBuffer src)

Description copied from interface: ChannelBuffer

Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer's position reaches its limit, and increases the writerIndex by the number of the transferred bytes.

Specified by:

writeBytes in interface ChannelBuffer

Overrides:

writeBytes in class AbstractChannelBuffer

writeBytes

public int writeBytes(InputStream in,
             int length)
               throws IOException

Description copied from interface: ChannelBuffer

Transfers the content of the specified stream to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes.

Specified by:

writeBytes in interface ChannelBuffer

Overrides:

writeBytes in class AbstractChannelBuffer

length - the number of bytes to transfer

Returns:

the actual number of bytes read in from the specified stream

Throws:

IOException - if the specified stream threw an exception during I/O

array

public byte[] array()

Description copied from interface: ChannelBuffer

Returns the backing byte array of this buffer.

hasArray

public boolean hasArray()

Description copied from interface: ChannelBuffer

Returns true if and only if this buffer has a backing byte array. If this method returns true, you can safely call ChannelBuffer.array() and ChannelBuffer.arrayOffset().

arrayOffset

public int arrayOffset()

Description copied from interface: ChannelBuffer

Returns the offset of the first byte within the backing byte array of this buffer.