Is there any way of parametrizing conversion rule in Logback? I've tried adding child nodes, additional attributes and I don't see a way to do it.
<conversionRule conversionWord="boundedMsg" converterClass="com.package.util.logging.converters.LongMessageConverter">
I would like to add parameter that will be used by LongMessageConverter class.
My application is setup on Spring Boot and I am using Sl4J.
This is more a question around Logback than anything to do with Spring Boot. What you need to do is something similar to the MDCConverter
. Within your pattern you would specify something like:
<conversionRule conversionWord="boundedMsg" converterClass="com.package.util.logging.converters.LongMessageConverter"/>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%boundedMsg{25} [%thread] - %msg%n</pattern>
</encoder>
</appender>
The 25
is an option made available to the Converter during the start()
method call. It is identified as the first option. You could end up passing a number of options to the converter. This way the converter is generic for any number of patterns that you specify in your Logback configuration.
The start method would look like:
private int msgLength;
@Override
public void start() {
msgLength = Integer.parseInt(getFirstOption());
super.start();
}
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