I think having a web console plugin provided by the logging implementation that acts like a tail on the configured log files is the best we can come up. So you change the configuration and watch the logs files. (But even this might not provide enough information if the logging is configured in a way to hide the problems or not add them to the log file)
Anything else, like Felix says, is not realistic. Carsten 2013/5/18 Ian Boston <[email protected]> > Hi, > Filter, not parse. > Just present the lines and let the human parse. Generally if there is an > error, there is a problem. What it is is so variable it needs > an intelligent being to parse, not code. > > But your right, wouldn't work anyway, not in a cluster. > Ian > > > On 18 May 2013 11:34, Felix Meschberger <[email protected]> wrote: > > > Hi > > > > > > Am 17.05.2013 um 17:26 schrieb Ian Boston: > > > > > Hi, > > > Would be useful and make it possible to re-config with confidence > > remotely. > > > > > > Why not just monitor sling/logs/error.log over ajax via a servlet > after a > > > config is submitted, ie lines matching a pattern since timestamp... > until > > > the user moves away from the page. That is almost what we do manually, > > have > > > a look in error.log for anything suspicious. > > > > Log file parsing is bound to fail: The log messages are neither > > standardized nor clear. It would be a constant battle to adapt the parse > > patterns. > > > > Plus: what file do you want to parse ? logs/error.log happens to be the > > file in many cases, but this is not guaranteed. > > > > > > > > Is it true that most services output log messages at error or warn in > the > > > event of a config problem, or does some other class/thread report > > problems ? > > > > Not necessairily: The ConfigurationAdmin service logs > > ConfigurationExceptions thrown by ManagedService[Factory] services. > > Declarative Services Runtime logs a message if a component activation > > fails; but it cannot tell, whether that activation is related to > > configuration or not. > > > > > > > > Would it work in a cluster ? > > > > Probably not. > > > > > > > > Presumably its rare not to have anything going to sling/logs/error.log > ? > > > > Yes, but how would you parse ? There is no spec on the log file message. > > > > Regards > > Felix > > > > > > > > Ian > > > > > > > > > On 17 May 2013 01:34, Bertrand Delacretaz <[email protected]> > > wrote: > > > > > >> Hi, > > >> > > >> Does anyone have an idea how we could provide feedback in the > > >> webconsole when saving a configuration leads to errors? > > >> > > >> Creating two loggers with the same category, for example, is invalid, > > >> but the only feedback is ERROR messages in the logs, from the > > >> webconsole UI you don't see anything wrong. > > >> > > >> AFAIK applying saved configs is asynchronous, so it's not trivial - > > >> we'd need the thread that saves them to send events when exceptions > > >> are thrown, or log interceptors...sounds a bit complicated but having > > >> that feedback would be valuable. > > >> > > >> Thoughts? > > >> > > >> -Bertrand > > >> > > > > > -- Carsten Ziegeler [email protected]
