Can micronaut log access logs with logback? - logback

Question

I'm trying to setup access-logs in micronaut, but, as logback-access library uses a servlet filter, I don't see a straight-forward way to do it.
Is there a different solution? Some hidden Micronaut config or a trustable adapter of the filter (A Micronaut Filter wrapper for Servlet filters would be great)

Answer 1

The Micronaut http server supports automatically adding a LoggingHandler, you have to supply micronaut.server.netty.logLevel: <<level>> in your configuration where level is one of TRACE, DEBUG, INFO, WARN, ERROR. I don't know if that will provide the same detail that logback-access does, but you can give it a try.
EDIT: Be sure to also configure a logger. For example in logback:
<logger name="io.netty.handler.logging" level="TRACE"/>

Answer 2

I used the mn CLI to create my application (using groovy as the language for my development), and mn code generated a trivial logback.xml. from the 1st time I ran my application, logging was working.
Here's what was generated OOTB:
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<withJansi>true</withJansi>
<!-- encoders are assigned the type
ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
<encoder>
<pattern>%cyan(%d{HH:mm:ss.SSS}) %gray([%thread]) %highlight(%-5level) %magenta(%logger{36}) - %msg%n</pattern>
</encoder>
</appender>
<root level="info">
<appender-ref ref="STDOUT" />
</root>
</configuration>
Then I went to the logback home page and used its code generator to convert the mn seed xml file to logback.groovy.
here's the result, after I added my logger for the hello.world package.
// ----------------------------------------------------------
//
// Built on Sun Jul 07 02:41:38 CEST 2019 by logback-translator
// For more information on configuration files in Groovy
// please see http://logback.qos.ch/manual/groovy.html
// For assistance related to this tool or configuration files
// in general, please contact the logback user mailing list at
// http://qos.ch/mailman/listinfo/logback-user
// For professional support please see
// http://www.qos.ch/shop/products/professionalSupport
// ----------------------------------------------------------
import ch.qos.logback.classic.encoder.PatternLayoutEncoder
import ch.qos.logback.core.ConsoleAppender
import static ch.qos.logback.classic.Level.DEBUG
appender("STDOUT", ConsoleAppender) {
withJansi = true
encoder(PatternLayoutEncoder) {
pattern = "%cyan(%d{HH:mm:ss.SSS}) %gray([%thread]) %highlight(%-5level) %magenta(%logger{36}) - %msg%n"
}
}
root(INFO, ["STDOUT"])
logger("hello.world", DEBUG)