The NPE is because the Log instance is transient. I can fix this by getting a new instance when it is read from disk. I dont remember the method which is called when an object is serialized.
rgds Antony Paul ----- Original Message ----- From: "Shapira, Yoav" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Sent: Wednesday, September 15, 2004 6:33 PM Subject: RE: Serializable Logging implementation Hi, Then no one can help you if you don't give any details ;) Stack trace? Config details? Have you done any debugging of your own? NPEs usually take about a minute to resolve, much shorter than writing a message to this list and waiting for a response... Why don't people get this lesson? It's repeated at least once a day on this list ;) Yoav Shapira Millennium Research Informatics >-----Original Message----- >From: Antony Paul [mailto:[EMAIL PROTECTED] >Sent: Wednesday, September 15, 2004 9:04 AM >To: Tomcat Users List >Subject: Re: Serializable Logging implementation > >Then it throws NullPointerException > >rgds >Antony Paul > >----- Original Message ----- >From: "Shapira, Yoav" <[EMAIL PROTECTED]> >To: "Tomcat Users List" <[EMAIL PROTECTED]> >Sent: Wednesday, September 15, 2004 6:05 PM >Subject: RE: Serializable Logging implementation > > > >Hi, >Hmm, you want to be careful with this pattern. I like the private >static one for Loggers -- there are very good reasons it's the >recommended pattern (by log4j, by the java.util.logging folks) and the >one that's used (by Tomcat and most other serious apps I know of). > >If you really want to stick with your "base class gets the logger" >pattern, consider marking it as transient. > >Yoav Shapira >Millennium Research Informatics > > >>-----Original Message----- >>From: Antony Paul [mailto:[EMAIL PROTECTED] >>Sent: Wednesday, September 15, 2004 8:27 AM >>To: Tomcat Users List >>Subject: Re: Serializable Logging implementation >> >>I extend a base form which gets the Log as >>LogFactory.getLog(this.getClass()); >>So that no need to define and get a Log instance in subclass. Is there >any >>way so that I can follow this pattern. >> >>rgds >>Antony Paul >> >>----- Original Message ----- >>From: "Tim Funk" <[EMAIL PROTECTED]> >>To: "Tomcat Users List" <[EMAIL PROTECTED]> >>Sent: Wednesday, September 15, 2004 4:38 PM >>Subject: Re: Serializable Logging implementation >> >> >>> logging instances should be static to the class. >>> >>> // Commons logging example but a log4j equiv should be easy to find >>> private static Log log = LogFactory.getLog(MyClass.class); >>> >>> >>> -Tim >>> >>> Antony Paul wrote: >>> >>> > Hi, >>> > I used Log4J and commons logging in an ActionForm which is >stored >>in >>the >>> > session. When I reload the context it is invalidating the session >>because it >>> > is non serializable. Is there any work around for this ?. Or do I >have >>to >>> > use any other Logger. >>> > >>> >>> --------------------------------------------------------------------- >>> 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] > > > > >This e-mail, including any attachments, is a confidential business >communication, and may contain information that is confidential, >proprietary >and/or privileged. This e-mail is intended only for the individual(s) to >whom it is addressed, and may not be saved, copied, printed, disclosed or >used by anyone else. If you are not the(an) intended recipient, please >immediately delete this e-mail from your computer system and notify the >sender. Thank you. > > >--------------------------------------------------------------------- >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] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. --------------------------------------------------------------------- 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]
