net.tomp2p.message

Class MessageHeaderCodec

java.lang.Object

net.tomp2p.message.MessageHeaderCodec

public final class MessageHeaderCodec
extends Object

Encodes and decodes the header of a Message sing a Netty Buffer.

Author:

Thomas Bocek

Field Summary

Fields

Modifier and Type	Field and Description
static int	HEADER_SIZE

Method Summary

Methods

Modifier and Type	Method and Description
static Message.Content[]	decodeContentTypes(int contentTypes, Message message) Decodes the 8 content types from an integer (32 bit).
static Message	decodeHeader(io.netty.buffer.ByteBuf buffer, InetSocketAddress recipientSocket, InetSocketAddress senderSocket) Decodes a message object.
static int	encodeContentTypes(Message.Content[] contentTypes) Encodes the 8 content types to an integer (32 bit).
static void	encodeHeader(io.netty.buffer.ByteBuf buffer, Message message) Encodes a message object.

Methods inherited from class java.lang.Object

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

Field Detail

HEADER_SIZE

public static final int HEADER_SIZE

See Also:

Constant Field Values

Method Detail

encodeHeader

public static void encodeHeader(io.netty.buffer.ByteBuf buffer,
                Message message)

Encodes a message object. The format looks as follows: 28bit p2p version - 4bit message type - 32bit message id - 8bit message command - 160bit sender id - 16bit sender tcp port - 16bit sender udp port - 160bit recipient id - 32bit content types - 8bit options. It total, the header is of size 58 bytes.

Parameters:

buffer - The buffer to encode to

message - The message with the header that will be encoded

decodeHeader

public static Message decodeHeader(io.netty.buffer.ByteBuf buffer,
                   InetSocketAddress recipientSocket,
                   InetSocketAddress senderSocket)

Decodes a message object. The format looks as follows: 28bit p2p version - 4bit message type - 32bit message id - 8bit message command - 160bit sender id - 16bit sender tcp port - 16bit sender udp port - 160bit recipient id - 32bit content types - 8bit options. It total, the header is of size 58 bytes.

Parameters:

buffer - The buffer to decode from

recipientSocket - The recipient of the message

senderSocket - The sender of the packet, which has been set in the socket class

Returns:

The partial message where only the header fields are set

encodeContentTypes

public static int encodeContentTypes(Message.Content[] contentTypes)

Encodes the 8 content types to an integer (32 bit).

Parameters:

contentTypes - The 8 content types to be encoded. Null means Content.Empty

Returns:

The encoded 32bit integer

decodeContentTypes

public static Message.Content[] decodeContentTypes(int contentTypes,
                                   Message message)

Decodes the 8 content types from an integer (32 bit).

Parameters:

contentTypes - The 8 content types to be decoded. No null values are returned

message -

Returns:

The decoded content types