How to log in an OSGi plugin

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Xander Steinmann

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Apr 22, 2021, 5:20:23 AMApr 22
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What is the best way to log in an OSGi plugin? System.out does not work (and is bad practice) and the com.dotmarketing.util.Logger does not work out of the box.

In the past we added this piece of code to a plugin in order to enable logging through the Logger (you need to export some logging classes for this to work):

LoggerContext dotcmsLoggerContext = Log4jUtil.getLoggerContext();
if (dotcmsLoggerContext != null) {
  //Initialing the log4j context of this plugin based on the dotCMS logger context
  pluginLoggerContext = (LoggerContext)   LogManager.getContext(this.getClass().getClassLoader(), false, dotcmsLoggerContext, dotcmsLoggerContext.getConfigLocation());
}

But since dotCMS 5.3.8 this also doesn't work any more. Any ideas on how to enable logging to the dotcms.log in an OSGi plugin?

Kind regards,

Xander

Falzone, Chris

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Apr 22, 2021, 7:52:47 AMApr 22
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That's what I have in mine and it seems to work at least in 5.0.3 and 20.11.1.  Maybe something broke and they fixed it in later versions?  They still have this in the docs:

https://dotcms.com/docs/latest/osgi-dynamic-plugin-logging

Though I see the package names are not correct.  They don't have the repackaged stuff anymore, so that needs to be updated.

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jonathan...@dotcms.com

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Apr 22, 2021, 11:49:50 AMApr 22
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Hi Xander,

Depending on the version, you can do something like

Logger.info(this.getClass().getName(), "Some log");

Always use the class as a String, instead of a class since the object could be not accesible (does not exists) on dotCMS.

Best,
J

Xander Steinmann

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May 4, 2021, 10:00:46 AM (8 days ago) May 4
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We've updated the dotCMS Logger according to this fix:  #20039
This helped in our case.

Kind regards,

Xander
Op donderdag 22 april 2021 om 17:49:50 UTC+2 schreef jonathan...@dotcms.com:

Nathan Keiter

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May 4, 2021, 10:50:43 AM (8 days ago) May 4
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Yeah somewhere along the 5.x line using the class no longer works for the logger. You have to use the text string now.


I don't know what changed... maybe a version change on the OSGI framework?

Nathan I. Keiter | Lead Network Applications Programmer | I.D.E.A Council Member
Gettysburg College | Information Technology | DataSystems
Campus Box 2453 | 300 North Washington Street | Gettysburg, PA 17325
Phone: 717.337.6993
https://www.gettysburg.edu<https://www.gettysburg.edu/>
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Subject: [dotcms] Re: How to log in an OSGi plugin

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