Masking layout to redact sensitive info from log messages #logback

logback.xml

<configuration>
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
            <layout class="com.example.gateway.MaskingPatternLayout">
                <Pattern>
                    %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n
                </Pattern>
            </layout>
        </encoder>
    </appender>
    <root level="INFO">
        <appender-ref ref="STDOUT" />
    </root>
</configuration>

MaskingPatternLayout.java

package com.example.gateway;

import ch.qos.logback.classic.PatternLayout;
import ch.qos.logback.classic.spi.ILoggingEvent;

public class MaskingPatternLayout extends PatternLayout {

    private String patternsProperty;

    public String getPatternsProperty() {
        return patternsProperty;
    }

    public void setPatternsProperty(String patternsProperty) {
        this.patternsProperty = patternsProperty;
    }

    @Override
    public String doLayout(ILoggingEvent event) {
        String message = super.doLayout(event);

        message = message.replace("8080 (http)", "MAMAMAMA");
        return message;
    }

}