FWIW, decoupling the filePattern from the rollover frequency is one of the things I had in mind with
1. LOG4J2-1198 <https://issues.apache.org/jira/browse/LOG4J2-1198>. On Tuesday, 5 January 2016, Gary Gregory <[email protected]> wrote: > On Mon, Jan 4, 2016 at 11:04 PM, Anshu Garg1 <[email protected] > <javascript:;>> wrote: > > > Hi Ralph, > > > > We have actually tried log4j2, but unfortunately with that also we could > > not meet our requirements > > > > We are trying a JSON log using rolling file appender based on both time > > and size but we are facing below challenges > > > > 1. Apache log4j2 default roll over implementation adds time stamp to log > > file name while saving and closing, while our requirement is to add time > > stamp to file name at the time of file creation. For this we implemented > > our own rollover strategy. But that was not a complete solution since > > first file name was saved in rolling file appender without time stamp and > > to change that we extended "AbstractOutputStreamAppender" to create our > > own RollingFileAppender (but most of code in it is from Apache, except > > what we had to modify to set first file name with time stamp). > > > > > http://stackoverflow.com/questions/30059333/log4j2-rolling-appender-filename-sliding-according-to-pattern > > > > > > > http://stackoverflow.com/questions/14862770/log4j2-assigning-file-appender-filename-at-runtime > > > > > > 2. Above lead to mismatch between the type of parameters in various > other > > classes' methods where default Apache classes' types were expected but > > we were using our own implementation. So we had to use source code for > > such classes as is and just replace parameters' types from default to our > > implemented classes. > > > > 3. By default JSON Layout from Apache log4j2 has a non resolved defect > > which does not write a valid JSON. Log entries do not have a comma > between > > then which results in invalid JSON. To rectify this we implemented our > own > > layout. This again has most of the code from Apache but few changes here > > and there to get comma at start of each entry except first. > > https://issues.apache.org/jira/browse/LOG4J2-908 > > > Hello Anshu, > > LOG4J2-908 <https://issues.apache.org/jira/browse/LOG4J2-908> is fixed in > Git master. You can build from Git and install locally or point your Maven > build to our SNAPSHOT repository here: > > https://repository.apache.org/content/repositories/snapshots/ > > > > > > 4. We had to customize header and footer values as per our requirement, > > since default in Apache default header is "[" and footer is "]". While we > > needed more information in header section. > > > > If you want to make the "[" and "]" customizable for the JSON layout, > please create a JIRA. Can you describe the use case please? That would make > for a better story in the documentation. > > > > 5. With Apache log4j2's default behavior for time based rollover > > duration's unit was determined by file pattern. We had to make duration > > time unit independent of file pattern because with default behavior if a > > user wanted time stamp in file name till mili seconds then even file > > rollover would happen in mili seconds which is not desired. And if user > > wanted hourly or daily roll over then file stamp could only be used till > > date or hour. To be able to specify duration in a definite unit (minutes > > in our case) we had to implement our own PatternProcessor. > > https://issues.apache.org/jira/browse/LOG4J2-573 > > > > 6. We needed to add some custom log fields in JSON logs for which we had > > to write our own LogEntry and MessageFactory. > > > > Can you be more specific please? > > > > > > All above needed to write own classes with most functionality copied from > > Apache which means we could not achieve above with just extending the > > Apache classes. We had to make source code changes which we want to > avoid. > > Do you have any suggestion to overcome above without having to fork code > > of Log4j2 ? > > > > You've come to the right place. Let's start with your validation that > https://issues.apache.org/jira/browse/LOG4J2-908 has been fixed for your > use case. > > Gary > > > > We did not find any solution to above so we came back to Log4j1. Is there > > a way round to get footer in Log4j1 or Log4j2, with above requirements, > > without having to change source code ? > > > > > > -Thanks & Regards, > > Anshu Garg > > Platform Technology Center, India > > > > > > > > > > > > From: Ralph Goers <[email protected] <javascript:;>> > > To: Log4J Users List <[email protected] <javascript:;>> > > Date: 01/05/2016 12:04 PM > > Subject: Re: Using log4j1.2.17 foter is not getting added to each > > log file in rollingfileappender > > > > > > > > Please see > > > > > https://blogs.apache.org/foundation/entry/apache_logging_services_project_announces > > < > > > > > https://blogs.apache.org/foundation/entry/apache_logging_services_project_announces > > >. > > > > Ralph > > > > > On Jan 4, 2016, at 11:14 PM, Anshu Garg1 <[email protected] > <javascript:;>> wrote: > > > > > > Hi, > > > > > > We have extended patternlayout to set custom footer and header. Now > when > > > > > we use this pattern in rolling file appender footer is only added to > > last > > > log file generated while header is added to all files. Our requirement > > is > > > to have footer also added to files created. Any suggestion? Here is the > > > snippet. > > > > > > Logger logger = Logger.getLogger("myLogger"); > > > CustomPattern pattern = new CustomPattern(); > > > pattern.setHeader("HeaderText"); > > > pattern.setFooter("FooterText"); > > > rollingFileAppender.setLayout(pattern); > > > > > > -Thanks & Regards, > > > Anshu Garg > > > Platform Technology Center, India > > > > > > > > > > > > > > > > -- > E-Mail: [email protected] <javascript:;> | [email protected] > <javascript:;> > 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 >
