RE: Can I have time stamp in log file name?

Hi,

 

I had a similiar requirement at my work. We got around it by using the config system property value substitution mechanism. It's not the best solution I'm sure, for many reasons, but it worked for us.

 

To give an example, the first time you configure and everytime thereafter you want to change the filename, you have code to do as follows:

 

        Date now = new Date();
       
        System.setProperty("log4j.hours", new String(now.getHours()));
        System.setProperty("log4j.minutes", new String(now.getMinutes()));
        System.setProperty("log4j.seconds", new String(now.getSeconds()));

 

        BasicConfigurator.resetConfiguration();
        PropertyConfigurator.configure("log4j.properties");

The contents of your log4j.properties file then looks something like this:

 

        log4j.rootLogger=INFO, A1

.
        log4j.appender.A1=org.apache.log4j.RollingFileAppender
        log4j.appender.A1.File=/home/log/Log_${log4j.hours}_${log4j.minutes}_${log4j.seconds}.txt
        log4j.appender.A1.MaxFileSize=100KB
        log4j.appender.A1.MaxBackupIndex=1
        log4j.appender.A1.layout=org.apache.log4j.PatternLayout
        log4j.appender.A1.layout.ConversionPattern=%p %t %c - %m%n

Cheers,

Jess

 

-----Original Message-----
From: FabijanicA@xxxxxxxxxxxxxx [mailto:FabijanicA@xxxxxxxxxxxxxx]
Sent: 21 February 2005 13:39
To: Log4CXX User
Subject: Re: Can I have time stamp in log file name?

AFAICT, the closest to what you are looking for would be the DailyRolingFileAppender - it automatically renames old example.log to example.log.date format at midnight, when the new day file is created.

But, then there are few (significant) catches - there is no option to automatically delete old files (really a pain). Also, it has been deprecated in log4j (in favor of using strategy design pattern, I believe), so I guess it will go away in log4cxx as well.

Alex

"Ambarish Mitra" <ambarish_mitra@xxxxxxxxxxxxxxxx> wrote on 02/21/2005 08:07:49 AM:

> Hi,
>
> Can I have time stamp in log file name?
>
> To elaborate, if my entries in the property files are:
> ...
> log4j.appender.R=org.apache.log4j.RollingFileAppender
> log4j.appender.R.File=../logs/example.log
> ..
>
> Now, I want that instead of log file name: example.log, I want the name as
> example.log.<time> of creation, is there any way to accomplish this?
>
> -Ambarish.
>
>
> [attachment "winmail.dat" deleted by Aleksandar Fabijanic/Maintenance/NSB]

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