This extension for the default FileHandler can rotate log files like the Linux Logrotate command.

We provide a VI package (*.vip) to be installed with the JKI VI Package Manager.

The Create LogRotate method takes a cluster LogRotate Configuration for all specific options.

Cluster LogRotate Configuration:

• Rotations: Max number of rotations for the log file. With n rotations, there will be n additional files to the log file. If Rotations is 0, no file with the content of the previous period will be created.
• Max Size (Byte): If the log file size exceeds “Max Size”, the log file will be rotated. If “Max Size” is 0, the log file will not be rotated by file size.
• Period: The period in which interval the rotation will be executed. Possible intervals are:

  • None: No rotation by period.
  • Instant (for testing): The file will be rotated instantly with every log event. This case is intended for testing only.
  • hourly: The log file will be rotated on every full hour.
  • daily: The log file will be rotated on every new day.
  • weekly: The log file will be rotated on every new week.
  • monthly: The log file will be rotated on every new month.
• Compression CMD: If provided, use this command to compress the rotated log files with an external program (e.g. 7zip, gzip). If the command contains white spaces, it must be enclosed in quotes. The variable $INPUT contains the file path of the rotated log file and the variable $OUTPUT the file path of the compressed output file. Do _not_ enclose these variables in quotes, this is done automatically. $INPUT is mandatory, $OUTPUT not, it depends on the program whether you need it. See examples below.
• Compress Extension: Filename extension for the compressed log files, e.g. “zip”.

The initialization is the same as for other Log-Handler. Use the method Create LogRotateFileHandler.vi to instantiate a new LogRotate-Handler and configure it. Then wire the object together with other Log-Handlers, if applicable, as array to the Init Loggin method.

7-Zip on Windows with zip file format:

“C:\Program Files\7-Zip\7z.exe” a -tzip $OUTPUT $INPUT

GZip on Linux:

gzip “$INPUT”