Y::Notifier - Implementation - The networking component

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• Derived from Msg in the "Panther Book" because
• Single threaded
• Message passing
• Non-blocking (mostly) with a mixture of select and syswrite on sockets in non-blocking mode, handling the EWOULDBLOCK/EAGAIN errors correctly
• Event-loop based on select
• Improvements
• Made completely non-blocking
• we can't allow a single threaded server to block for any reason
• Non-blocking recieve() (including packet length)
• Non-blocking connect()
• Added robust error handling
• Client callbacks
• Flow control (high/low watermarks)
• Added broadcast and Later Multicast
• Added timers
• Completely re-written in C/XS
• Renamed Y::Msg

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Y::Notifier - Implementation - The networking component