org.thales.punch.netty.handler.codec

Class SyslogAutoOctetOrEolFrameDecoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

org.thales.punch.netty.handler.codec.SyslogAutoOctetOrEolFrameDecoder

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler

public class SyslogAutoOctetOrEolFrameDecoder
extends io.netty.handler.codec.ByteToMessageDecoder

This decoder ic capable of detecting on the same received buffer an mix of octet-counting or end-of-line SYSLOG messages.

It is a slight variation of the DelimiterBasedFrameDecoder NETTY decoder.

Nested Class Summary

Nested classes/interfaces inherited from class io.netty.handler.codec.ByteToMessageDecoder

io.netty.handler.codec.ByteToMessageDecoder.Cumulator

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable

Field Summary

Fields inherited from class io.netty.handler.codec.ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Constructor and Description
SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength, boolean stripDelimiter, boolean failFast, io.netty.buffer.ByteBuf... delimiters) Creates a new instance.
SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength, boolean stripDelimiter, boolean failFast, io.netty.buffer.ByteBuf delimiter) Creates a new instance.
SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength, boolean stripDelimiter, io.netty.buffer.ByteBuf... delimiters) Creates a new instance.
SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength, boolean stripDelimiter, io.netty.buffer.ByteBuf delimiter) Creates a new instance.
SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength, io.netty.buffer.ByteBuf... delimiters) Creates a new instance.
SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength, io.netty.buffer.ByteBuf delimiter) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
protected Object	decode(io.netty.channel.ChannelHandlerContext ctx, io.netty.buffer.ByteBuf buffer) Create a frame out of the ByteBuf and return it.
protected void	decode(io.netty.channel.ChannelHandlerContext ctx, io.netty.buffer.ByteBuf in, List<Object> out)
protected static int	startWithNumeric(io.netty.buffer.ByteBuf buffer)

Methods inherited from class io.netty.handler.codec.ByteToMessageDecoder

actualReadableBytes, callDecode, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, handlerRemoved0, internalBuffer, isSingleDecode, setCumulator, setDiscardAfterReads, setSingleDecode, userEventTriggered

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, handlerAdded, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.channel.ChannelHandler

handlerAdded

Constructor Detail

SyslogAutoOctetOrEolFrameDecoder

public SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength,
                                        io.netty.buffer.ByteBuf delimiter)

Creates a new instance.

Parameters:

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if the length of the frame exceeds this value.

delimiter - the delimiter

SyslogAutoOctetOrEolFrameDecoder

public SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength,
                                        boolean stripDelimiter,
                                        io.netty.buffer.ByteBuf delimiter)

Creates a new instance.

Parameters:

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if the length of the frame exceeds this value.

stripDelimiter - whether the decoded frame should strip out the delimiter or not

delimiter - the delimiter

SyslogAutoOctetOrEolFrameDecoder

public SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength,
                                        boolean stripDelimiter,
                                        boolean failFast,
                                        io.netty.buffer.ByteBuf delimiter)

Creates a new instance.

Parameters:

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if the length of the frame exceeds this value.

stripDelimiter - whether the decoded frame should strip out the delimiter or not

failFast - If true, a TooLongFrameException is thrown as soon as the decoder notices the length of the frame will exceed maxFrameLength regardless of whether the entire frame has been read. If false, a TooLongFrameException is thrown after the entire frame that exceeds maxFrameLength has been read.

delimiter - the delimiter

SyslogAutoOctetOrEolFrameDecoder

public SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength,
                                        io.netty.buffer.ByteBuf... delimiters)

Creates a new instance.

Parameters:

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if the length of the frame exceeds this value.

delimiters - the delimiters

SyslogAutoOctetOrEolFrameDecoder

public SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength,
                                        boolean stripDelimiter,
                                        io.netty.buffer.ByteBuf... delimiters)

Creates a new instance.

Parameters:

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if the length of the frame exceeds this value.

stripDelimiter - whether the decoded frame should strip out the delimiter or not

delimiters - the delimiters

SyslogAutoOctetOrEolFrameDecoder

public SyslogAutoOctetOrEolFrameDecoder(int maxFrameLength,
                                        boolean stripDelimiter,
                                        boolean failFast,
                                        io.netty.buffer.ByteBuf... delimiters)

Creates a new instance.

Parameters:

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if the length of the frame exceeds this value.

stripDelimiter - whether the decoded frame should strip out the delimiter or not

failFast - If true, a TooLongFrameException is thrown as soon as the decoder notices the length of the frame will exceed maxFrameLength regardless of whether the entire frame has been read. If false, a TooLongFrameException is thrown after the entire frame that exceeds maxFrameLength has been read.

delimiters - the delimiters

Method Detail

decode

protected final void decode(io.netty.channel.ChannelHandlerContext ctx,
                            io.netty.buffer.ByteBuf in,
                            List<Object> out)
                     throws Exception

Specified by:

decode in class io.netty.handler.codec.ByteToMessageDecoder

Throws:

Exception

startWithNumeric

protected static int startWithNumeric(io.netty.buffer.ByteBuf buffer)

decode

protected Object decode(io.netty.channel.ChannelHandlerContext ctx,
                        io.netty.buffer.ByteBuf buffer)
                 throws Exception

Create a frame out of the ByteBuf and return it.

Parameters:

ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

buffer - the ByteBuf from which to read data

Returns:

frame the ByteBuf which represent the frame or null if no frame could be created.

Throws:

Exception