At 17:52 12.12.2002 -0500, you wrote:
Thanks for the clarification.
Originally, I had the Layout retrieve the hostname, but since logging
events can change machines and I want to record where they came from, I
have to modify LoggingEvent. I have to record the hostname somewhere before
it gets sent over a SocketAppender, and that must be in the LoggingEvent.
And then, I'm very wary of extending LoggingEvent cuz it's called
everywhere. I'll break everything. Thus, the only way to do this is to
either get the patch applied or use the MDC. I can use the MDC. Properties
would work too, but stickiness is obviously better.
Is stickiness really better? The hostname could be looked up once and
subsequently remembered by the SocketAppender. Before sending a logging
event on the wire, the SocketAppender could set the hostname (which it
keeps in its memory). The cost is a method call plus a hash lookup followed
by a variable assignment, in other words "nada" compared to serialization.
And, yeah, not all machines have a hostname. A co-worker was also wondering
if they could have more than one, if they have multiple interfaces in some
complex corporate setting where they have one name from the outside and
another from the inside. I don't know.
dan
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Ceki
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