On Sun, 2 Nov 2003, Ceki Gülcü wrote: | | Domains result from an *internal* refactoring of loggers. In 1.2.8 a logger | is: | | 1) an object where appenders can be attached to, and | 2) an object which can decide whether a log statement is enabled or not | | In the next version of log4j, a logger can be viewed as a shell around one | or more domains, where domains are: | | 1) an object where appenders can be attached to, and | 2) an object which can decide whether a log statement is enabled or not | | A logger just glues multiple domains together. A logger has fixed rules | defining the interaction of the domains it contains. | | A hierarchy is a space where multiple domains live in a hierarchical setup. | It can be viewed as a forrest where multiple trees (i.e. domains linked in | a tree like structure) live. | | I hope this sheds some light on this topic. Much better documentation will | become available in the near future.
Pretty much what I'd expect, but how does a Logger decide if it should log or not? This sounds like a lot of overhead (it has to check its entire list of attached domains? Or is there a way to "quick-return" if the statement shouldn't log?). And definately a 2.0 thing, this is no small refactor. | | Coming back to the TRACE level, I think that domains may offer a better | alternative. The ongoing discussion has raised some very interesting | questions to which I do not have definitive answers. You haven't answered my post on this. a) Performance impacts, as trace is an extremely verbose level. b) Levels define an implicit view of the -importance- of a log-statement - and not "where it comes from", or who should view it, as such. It's a descriptive -importance level-. Domains wont supersede this. c) Trace is something else! -- Mvh, Endre Stølsvik M[+47 93054050] F[+47 51625182] Developer @ CoreTrek AS - http://www.coretrek.com/ CoreTrek corporate portal / EIP - http://www.corelets.com/ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
