I don't follow... If you walk the stack trace you can find the name of the original class whose main() method was called, but how would that give you access to the main method's parameter values?
Sent from my iPhone > On 2014/08/07, at 9:26, Gary Gregory <[email protected]> wrote: > > Yes you are right but the stack walker could be used even if you do not > control to source for main. Maybe a script calls a main and then my app > plugin gets called and I want to also follow the verbose command line setting. > > > Gary > > <div>-------- Original message --------</div><div>From: Ralph Goers > <[email protected]> </div><div>Date:08/06/2014 19:18 (GMT-05:00) > </div><div>To: Log4J Users List <[email protected]> > </div><div>Subject: Re: Set the file name based on command line args > </div><div> > </div>Wouldn’t it be easier to have a Lookup that your main called and just > passed the arguments? But yeah, it should be possible to do what you are > suggesting. > > Ralph > >> On Aug 6, 2014, at 4:09 PM, Gary Gregory <[email protected]> wrote: >> >> I wonder if we could write a "MainArgumentsLookup" that finds the main >> thread and walks up the stack to the public static main(String[]) main >> methods and gets the arguments from the stack... >> >> Gary >> >> >> On Wed, Aug 6, 2014 at 6:54 PM, Ralph Goers <[email protected]> >> wrote: >> >>> Well…. >>> >>> You would really be passing the name of the file to the Appender, not a >>> Logger. Loggers only reference Appenders so you can’t really configure >>> them with Appender configuration data. That said, Log4j 2 provides a few >>> ways you could do this: >>> 1. Set a system property and reference it via ${sys:propertyName} in the >>> configuration. The manual has examples of this. >>> 2. Create a custom Lookup Plugin and then register the file name with the >>> Lookup. Then reference it from the configuration as ${myLookup: key} >>> where myLookup is the name of your custom Lookup and key is the name that >>> represents the file name value. >>> 3. Create a custom Configuration the extends XMLConfiguration or >>> JSONConfiguration. Pass the file name to that class and have it add that as >>> a property to the properties Map in the configuration. The XML could then >>> just reference it as ${propertyName}. >>> >>> Ralph >>> >>>> On Aug 6, 2014, at 2:03 PM, Arwen Pond <[email protected]> wrote: >>>> >>>> My application takes a parameter where the user can specify the log >>> file. I'd like to pass this parameter to the Logger which uses a >>> FileAppender. I am not sure how to do this in log4j 2. >>>> >>>> Thanks, >>>> Arwen >>>> >>>> >>>> This electronic mail message contains information that (a) is or >>>> may be CONFIDENTIAL, PROPRIETARY IN NATURE, OR OTHERWISE >>>> PROTECTED >>>> BY LAW FROM DISCLOSURE, and (b) is intended only for the use of >>>> the addressee(s) named herein. If you are not an intended >>>> recipient, please contact the sender immediately and take the >>>> steps necessary to delete the message completely from your >>>> computer system. >>>> >>>> Not Intended as a Substitute for a Writing: Notwithstanding the >>>> Uniform Electronic Transaction Act or any other law of similar >>>> effect, absent an express statement to the contrary, this e-mail >>>> message, its contents, and any attachments hereto are not >>>> intended >>>> to represent an offer or acceptance to enter into a contract and >>>> are not otherwise intended to bind this sender, >>>> barnesandnoble.com >>>> llc, barnesandnoble.com inc. or any other person or entity. >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: [email protected] >>> For additional commands, e-mail: [email protected] >> >> >> -- >> E-Mail: [email protected] | [email protected] >> Java Persistence with Hibernate, Second Edition >> <http://www.manning.com/bauer3/> >> JUnit in Action, Second Edition <http://www.manning.com/tahchiev/> >> Spring Batch in Action <http://www.manning.com/templier/> >> Blog: http://garygregory.wordpress.com >> Home: http://garygregory.com/ >> Tweet! http://twitter.com/GaryGregory > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
