org.joyqueue.broker.kafka.util

类 KafkaBufferUtils

java.lang.Object

org.joyqueue.broker.kafka.util.KafkaBufferUtils

public class KafkaBufferUtils
extends Object

Created by zhangkepeng on 16-8-18.

构造器概要

构造器

构造器和说明
KafkaBufferUtils()

方法概要

限定符和类型	方法和说明
static long	crc32(byte[] bytes) Compute the CRC32 of the byte array
static long	crc32(byte[] bytes, int offset, int size) Compute the CRC32 of the segment of the byte array given by the specificed size and offset
static Thread	newThread(String name, Runnable runnable, Boolean daemon) Create a new thread
static byte[]	readBytes(ByteBuffer buffer)
static byte[]	readCompactBytes(io.netty.buffer.ByteBuf buffer)
static String	readCompactString(io.netty.buffer.ByteBuf buffer)
static List<RawTaggedField>	readRawTaggedFields(io.netty.buffer.ByteBuf buffer)
static String	readString(ByteBuffer buffer) read string
static long	readUnsignedInt(ByteBuffer buffer, int index) Read an unsigned integer from the given position without modifying the buffers position
static int	readUnsignedIntLE(byte[] buffer, int offset) Read an unsigned integer stored in little-endian format from a byte array at a given offset.
static int	readUnsignedIntLE(InputStream in) Read an unsigned integer stored in little-endian format from the InputStream.
static long	readUnsignedLongLE(byte[] buffer, int offset)
static int	readUnsignedVarint(io.netty.buffer.ByteBuf buffer)
static int	readUnsignedVarint(ByteBuffer buffer) Read an integer stored in variable-length format using unsigned decoding from Google Protocol Buffers.
static byte[]	readVarBytes(ByteBuffer buffer)
static int	readVarint(io.netty.buffer.ByteBuf buffer)
static int	readVarint(ByteBuffer buffer)
static long	readVarlong(ByteBuffer buffer)
static byte[]	toArray(ByteBuffer buffer) Read the given byte buffer into a byte array
static byte[]	toArray(ByteBuffer buffer, int offset, int size) Read a byte array from the given offset and size in the buffer
static void	writeBytes(byte[] value, io.netty.buffer.ByteBuf buffer)
static void	writeUnsignedInt(ByteBuffer buffer, int index, long value) Write the given long value as a 4 byte unsigned integer.
static void	writeUnsignedIntLE(byte[] buffer, int offset, int value) Write an unsigned integer in little-endian format to a byte array at a given offset.
static void	writeUnsignedIntLE(OutputStream out, int value) Write an unsigned integer in little-endian format to the OutputStream.
static void	writeUnsignedLongLE(byte[] buffer, int offset, long value)
static void	writeVarBytes(byte[] value, io.netty.buffer.ByteBuf buffer)
static void	writeVarint(int value, io.netty.buffer.ByteBuf buffer)
static void	writeVarint(int value, ByteBuffer buffer)
static void	writeVarlong(long value, io.netty.buffer.ByteBuf buffer)
static void	writeVarlong(long value, ByteBuffer buffer)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

KafkaBufferUtils

public KafkaBufferUtils()

方法详细资料

writeUnsignedInt

public static void writeUnsignedInt(ByteBuffer buffer,
                                    int index,
                                    long value)

Write the given long value as a 4 byte unsigned integer. Overflow is ignored.

参数:

buffer - The buffer to write to

index - The position in the buffer at which to begin writing

value - The value to write

readUnsignedInt

public static long readUnsignedInt(ByteBuffer buffer,
                                   int index)

Read an unsigned integer from the given position without modifying the buffers position

参数:

buffer - the buffer to read from

index - the index from which to read the integer

返回:

The integer read, as a long to avoid signedness

readUnsignedVarint

public static int readUnsignedVarint(ByteBuffer buffer)

Read an integer stored in variable-length format using unsigned decoding from Google Protocol Buffers.

参数:

buffer - The buffer to read from

返回:

The integer read

抛出:

IllegalArgumentException - if variable-length value does not terminate after 5 bytes have been read

readUnsignedVarint

public static int readUnsignedVarint(io.netty.buffer.ByteBuf buffer)

crc32

public static long crc32(byte[] bytes)

Compute the CRC32 of the byte array

参数:

bytes - The array to compute the checksum for

返回:

The CRC32

crc32

public static long crc32(byte[] bytes,
                         int offset,
                         int size)

Compute the CRC32 of the segment of the byte array given by the specificed size and offset

参数:

bytes - The bytes to checksum

offset - the offset at which to begin checksumming

size - the number of bytes to checksum

返回:

The CRC32

readString

public static String readString(ByteBuffer buffer)

read string

参数:

buffer -

返回:

writeUnsignedIntLE

public static void writeUnsignedIntLE(byte[] buffer,
                                      int offset,
                                      int value)

Write an unsigned integer in little-endian format to a byte array at a given offset.

参数:

buffer - The byte array to write to

offset - The position in buffer to write to

value - The value to write

writeUnsignedIntLE

public static void writeUnsignedIntLE(OutputStream out,
                                      int value)
                               throws IOException

Write an unsigned integer in little-endian format to the OutputStream.

参数:

out - The stream to write to

value - The value to write

抛出:

IOException

readUnsignedIntLE

public static int readUnsignedIntLE(InputStream in)
                             throws IOException

Read an unsigned integer stored in little-endian format from the InputStream.

参数:

in - The stream to read from

返回:

The integer read (MUST BE TREATED WITH SPECIAL CARE TO AVOID SIGNEDNESS)

抛出:

IOException

readUnsignedIntLE

public static int readUnsignedIntLE(byte[] buffer,
                                    int offset)

Read an unsigned integer stored in little-endian format from a byte array at a given offset.

参数:

buffer - The byte array to read from

offset - The position in buffer to read from

返回:

The integer read (MUST BE TREATED WITH SPECIAL CARE TO AVOID SIGNEDNESS)

writeUnsignedLongLE

public static void writeUnsignedLongLE(byte[] buffer,
                                       int offset,
                                       long value)

readUnsignedLongLE

public static long readUnsignedLongLE(byte[] buffer,
                                      int offset)

newThread

public static Thread newThread(String name,
                               Runnable runnable,
                               Boolean daemon)

Create a new thread

参数:

name - The name of the thread

runnable - The work for the thread to do

daemon - Should the thread block JVM shutdown?

返回:

The unstarted thread

toArray

public static byte[] toArray(ByteBuffer buffer)

Read the given byte buffer into a byte array

toArray

public static byte[] toArray(ByteBuffer buffer,
                             int offset,
                             int size)

Read a byte array from the given offset and size in the buffer

readBytes

public static byte[] readBytes(ByteBuffer buffer)

readVarBytes

public static byte[] readVarBytes(ByteBuffer buffer)

readCompactBytes

public static byte[] readCompactBytes(io.netty.buffer.ByteBuf buffer)

readCompactString

public static String readCompactString(io.netty.buffer.ByteBuf buffer)

writeVarlong

public static void writeVarlong(long value,
                                io.netty.buffer.ByteBuf buffer)

writeVarlong

public static void writeVarlong(long value,
                                ByteBuffer buffer)

readVarlong

public static long readVarlong(ByteBuffer buffer)

writeVarint

public static void writeVarint(int value,
                               io.netty.buffer.ByteBuf buffer)

writeVarint

public static void writeVarint(int value,
                               ByteBuffer buffer)

readVarint

public static int readVarint(ByteBuffer buffer)

readVarint

public static int readVarint(io.netty.buffer.ByteBuf buffer)

writeBytes

public static void writeBytes(byte[] value,
                              io.netty.buffer.ByteBuf buffer)

writeVarBytes

public static void writeVarBytes(byte[] value,
                                 io.netty.buffer.ByteBuf buffer)

readRawTaggedFields

public static List<RawTaggedField> readRawTaggedFields(io.netty.buffer.ByteBuf buffer)