Can karaf see log from library which binding bundle use

Say orvibo binding, which use s20-sdk-0.0.6-SNAPSHOT.jar as library.

in karaf,
$log:set DEBUG org.openhab.binding.orvibo

I notice I can see log from orvibo binding, but can NOT see log from s20-sdk-0.0.6-SNAPSHOT.jar library.
I also notice orvibo binding is karaf bundle while the library is NOT.

Is it possible to see log from s20-sdk-0.0.6-SNAPSHOT.jar library which the binding use?

Thank you very much.

assuming this library uses log4j, which I give a 50/50 chance, then you can add a new appender and lover to the config and activate the logs.

if not…

Thank you very much, boss.
Will give a try. I appreciate your message.

I found it it NOT log4j but slf4j.
import org.slf4j.Logger;

By openhab log page, only log4j is mentioned.

Do you have some idea whether slf4j is supported by karaf as well?
Thank you.

1 in orvibo binding,
import org.slf4j.Logger;
2 in config, = DEBUG
3 I do see orvibo binding debug log on karaf console.

I don’t understand what is happening here.
Does that mean slf4j & log4j actually one thing? Thank you.

I seriously doubt it. You might be able to create a .properties file or .xml file and put it somewhere that slf4j will know to look to configure it. If not I’m afraid you are likely out of luck.

Thus, if you have bundles that import any of the the usual logging API packages (SLF4J, LOG4J, java.util.logging), you can use pax-logging to collect all the messages from all of them and manage them together.

By link, slj4j is supported by osgi.
Does that mean slf4j configuration can be put into org.ops4j.pax.logging.cfg?

I would assume so. We are well outside my expertise at this point.