Kamaelia.Protocol.Framing.DataDeChunker

class DataDeChunker(Axon.Component.component)

DataDeChunker([syncmessage]) -> new DataDeChunker component.

Synchronises to a stream of string data, delimited into chunks by a 'sync' sequence. Chunks are buffered until the next 'sync sequence is received and are then passed on.

Keyword arguments: - syncmessage - string to use as 'sync' sequence (default="XXXXXXXXXXXXXXXXXXXXXXXX")

Inboxes

control : shutdown messages (producerFinished)
inbox : partial message chunk strings
flush : instructions to flush the internal buffer

Outboxes

outbox : dechunked message strings
signal : producerFinished shutdown messages

Methods defined here

Warning!

You should be using the inbox/outbox interface, not these methods (except construction). This documentation is designed as a roadmap as to their functionalilty for maintainers and new component developers.

init(self, syncmessage)

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

decodeChunk(self, chunk)

unEscape and return the chunk, sans the 'sync' sequence prefix, or raise IncompleteChunk if the chunk isn't prefixed with the 'sync' sequence (can't guarantee the chunk is whole).

main(self)

Main loop.

shouldFlush(self)

Returns non-zero if a message has been received on the "flush" inbox

shutdown(self)

Shutdown on producerFinished message arriving at "control" inbox.

unEscapeSyncMessage(self, message)

Returns message with escaped occurrences of the 'sync' message unescaped again.

Feedback

Got a problem with the documentation? Something unclear, could be clearer? Want to help with improving? Constructive criticism, preferably in the form of suggested rewording is very welcome.

Please leave the feedback here, in reply to the documentation thread in the Kamaelia blog.

(C) 2006 Kamaelia Contributors, including the British Broadcasting Corporation, All Rights Reserved, This is an ongoing community based development site. As a result the contents of this page is the opinions of the contributors of the pages involved not the organisations involved. Specificially, this page may contain personal views which are not the views of the BBC.