Maven, logback & log4j2 setup for logging JSON in Java

ExceptionMessageConverter.java

package com.example.logging.converters;

import ch.qos.logback.classic.pattern.ThrowableProxyConverter;
import ch.qos.logback.classic.spi.IThrowableProxy;
import ch.qos.logback.classic.spi.StackTraceElementProxy;

public class ExceptionMessageConverter extends ThrowableProxyConverter {
    @Override
    protected String throwableProxyToString(IThrowableProxy tp) {
        StackTraceElementProxy[] stackTrace = tp.getStackTraceElementProxyArray();
        for (StackTraceElementProxy stackLine : stackTrace) {
            stackLine.getStackTraceElement().
        }
    }
}

ExceptionNameConverter.java

package com.example.logging.converters;

import ch.qos.logback.classic.pattern.ThrowableProxyConverter;
import ch.qos.logback.classic.spi.IThrowableProxy;

public class ExceptionNameConverter extends ThrowableProxyConverter {
    @Override
    protected String throwableProxyToString(IThrowableProxy tp) {
        return tp.getClassName();
    }
}

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="warn" packages="org.apache.logging.log4j.core">
    <appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <LogstashLayout dateTimeFormatPattern="yyyy-MM-dd'T'HH:mm:ss,SSS"
                            prettyPrintEnabled="false"
                            eventTemplateUri="classpath:log4j2EventLayout.json"
                            stackTraceEnabled="true"/>
        </Console>
    </appenders>

    <loggers>
        <root level="${env:SERVICE_LOG_LEVEL:-INFO}">
            <appender-ref ref="Console" />
        </root>
    </loggers>
</configuration>

log4j2EventLayout.json

{
  "loggingBackend": "log4j",
  "executionTimestamp": "${json:timestamp}",
  "level": "${json:level}",
  "service": "${env:APPLICATION_NAME:-undefined}",
  "operationId": "${json:mdc:operationId}",
  "component": "${json:logger:name}",
  "message": "${json:message}",
  "exception": {
    "name": "${json:exception:className}",
    "message": "${json:exception:message}",
    "stacktrace": "${json:exception:stackTrace:text}"
  }
}

logback.xml

<configuration>
<!--    https://stackoverflow.com/a/52512131-->
    <conversionRule conversionWord="exname" converterClass="com.example.logging.converters.ExceptionNameConverter"/>
    <conversionRule conversionWord="exmessage" converterClass="com.example.logging.converters.ExceptionMessageConverter"/>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder">
            <providers>
                <pattern>
                    <omitEmptyFields>true</omitEmptyFields>
                    <pattern>
                        {
                            "loggingBackend": "logback",
                            "executionTimestamp": "%date{yyyy-MM-dd'T'HH:mm:ss,SSS}",
                            "level": "%level",
                            "service": "${APPLICATION_NAME:-undefined}",
                            "operationId": "%mdc{operationId}",
                            "component": "%logger",
                            "message": "%message",
                            "exception": {
                                "name": "%exname",
                                "message": "%exmessage",
                                "stacktrace": "%throwable"
                            }
                        }
                    </pattern>
                </pattern>
            </providers>
        </encoder>
    </appender>

    <root level="${SERVICE_LOG_LEVEL:-INFO}">
        <appender-ref ref="STDOUT"/>
    </root>

</configuration>

pom.xml

<project>
    
  <dependencies>
    <!-- for logback -->
    <dependency>
      <groupId>net.logstash.logback</groupId>
      <artifactId>logstash-logback-encoder</artifactId>
      <version>${logback-logstash.version}</version>
      <scope>runtime</scope>
    </dependency>

    <!-- for log4j2 -->
    <dependency>
      <groupId>com.vlkan.log4j2</groupId>
      <artifactId>log4j2-logstash-layout</artifactId>
      <version>${log4j-logstash.version}</version>
      <scope>runtime</scope>
    </dependency>
  </dependencies>
    
</project>