Thanks, now I’ve found the solution
I’ve searched for JsonLayout configuration in log4j and I’ve adapted the
‘rolling’ appender deifiition to
# Rolling file appender
log4j2.appender.rolling.type = RollingRandomAccessFile
log4j2.appender.rolling.name = RollingFile
log4j2.appender.rolling.fileName = ${karaf.data}/log/karaf.log
log4j2.appender.rolling.filePattern = ${karaf.data}/log/karaf.log.%i
log4j2.appender.rolling.append = true
log4j2.appender.rolling.layout.type = JsonLayout
log4j2.appender.rolling.layout.compact = true
log4j2.appender.rolling.layout.eventEol = true
log4j2.appender.rolling.policies.type = Policies
log4j2.appender.rolling.policies.size.type = SizeBasedTriggeringPolicy
log4j2.appender.rolling.policies.size.size = 16MB
It required to install 3 additional bundles to fulfill the dependencies:
mvn:com.fasterxml.jackson.core/jackson-core/2.9.5
mvn:com.fasterxml.jackson.core/jackson-annotations/2.9.0
mvn:com.fasterxml.jackson.core/jackson-databind/2.9.5
Now I have 1 line with json log per logging event. I hope it will help others
who’d like to achieve the same.
Best regards,
Lukasz Lech
From: [email protected] [mailto:[email protected]] On Behalf Of
Grzegorz Grzybek
Sent: Mittwoch, 25. April 2018 16:21
To: [email protected]
Subject: Re: PAX Logging custom Layout
Hello
"log4j." prefixed properties in org.ops4j.pax.logging PID
(etc/org.ops4j.pax.logging.cfg file) should be used for pax-logging-api +
pax-logging-service bundles
"log4j2." prefixed properties in org.ops4j.pax.logging PID
(etc/org.ops4j.pax.logging.cfg file) should be used for pax-logging-api +
pax-logging-log4j2 bundles
So, the patterns to use depend on whether you want log4jv1 or log4jv2.
Log4j2 changed the way properties configurator works.
Log4j2 property syntax is described here:
http://logging.apache.org/log4j/2.x/manual/configuration.html#Properties
Log4j1: https://logging.apache.org/log4j/1.2/manual.html
The most "visible" difference is that with log4j1, you specify both appenders
and level in single property. With Log4j2, you have different properties for
level and different for appender(s).
I hope this clears the confusion a bit.
regards
Grzegorz Grzybek
2018-04-25 16:10 GMT+02:00 Lukasz Lech
<[email protected]<mailto:[email protected]>>:
Hello,
I’m very confused with Pax Logging configuration. For example, on the wiki
https://ops4j1.jira.com/wiki/spaces/ops4j/pages/7274541/Configuring+Pax+Logging
the layout is configured this way:
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
However, In org.ops4j.pax.logging.cfg in Karaf distribution I have:
log4j2.appender.console.layout.type = PatternLayout
In first syntax, I see how I could replace standart PatternLayout with my own,
in that what is actually used in Karaf I don’t know where I should start…
I need (most likely) to customize PatternLayout because I’m using Dockerized
karaf and Elasticsearch, which together have no support for multiline messages.
So if Java logs something multi-line like StackTrace, my Patter need to convert
the message to single-line.
Is there any entry point I can start doing my research? Honestly, pax logging
is the part that is still a black magic to me. That what I see in config file
differs from both log4j property-based documentation and that what can be found
on wiki, every time I’m changing there something I do it through experimenting…
Best regards,
Lukasz Lech
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