How to mask the PII/PCI data with this appender

[DevProblems]

I have added the layout in the appender like this

**

<appender name="awslambda" class="org.jlib.cloud.aws.lambda.logback.AwsLambdaAppender">
    <encoder type="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
        <layout class="com.example.app.MaskingPatternLayout">
            <maskPattern>(\w+@\w+\.\w+)</maskPattern>
            <pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}] &lt;%-36X{AWSRequestId}&gt; &lt;%-36X{messageUuid}&gt; %-5level
                %logger{10} - %msg%n
            </pattern>
        </layout>
    </encoder>
</appender>

<root level="INFO">
    <appender-ref ref="awslambda"/>
</root>

**

MaskingPatternLayout class:

package com.example.app;

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

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.IntStream;

public class MaskingPatternLayout extends PatternLayout {

private Pattern pattern = null;

public void addMaskPattern(String maskPattern) {
    pattern = Pattern.compile(maskPattern, Pattern.MULTILINE);
}

@Override
public String doLayout(ILoggingEvent event) {
    String log = super.doLayout(event);
    StringBuilder logBuilder = new StringBuilder(log);
    Matcher matcher = pattern.matcher(logBuilder);
    while (matcher.find()) {
        int startIndex = matcher.start();
        int endIndex = matcher.end();
        IntStream.range(startIndex, endIndex).forEach(i -> logBuilder.setCharAt(i, '*'));
    }
    return logBuilder.toString();
}

}

Logs when invoking the Lambda Function:

|-ERROR in ch.qos.logback.core.joran.util.PropertySetter@77a567e1 - Could not invoke method setLayout in class ch.qos.logback.classic.encoder.PatternLayoutEncoder with parameter of type MaskingPatternLayout java.lang.reflect.InvocationTargetException
at java.lang.reflect.InvocationTargetException
at at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at at java.lang.reflect.Method.invoke(Method.java:498)
at at ch.qos.logback.core.joran.util.PropertySetter.invokeMethodWithSingleParameterOnThisObject(PropertySetter.java:250)
at at ch.qos.logback.core.joran.util.PropertySetter.setComplexProperty(PropertySetter.java:300)
at at ch.qos.logback.core.joran.action.NestedComplexPropertyIA.end(NestedComplexPropertyIA.java:173)
at at ch.qos.logback.core.joran.spi.Interpreter.callEndAction(Interpreter.java:309)
at at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:193)
at at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:179)
at at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:62)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:165)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:152)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:110)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53)
at at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:82)
at at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:157)
at at ch.qos.logback.classic.spi.LogbackServiceProvider.initializeLoggerContext(LogbackServiceProvider.java:49)
at at ch.qos.logback.classic.spi.LogbackServiceProvider.initialize(LogbackServiceProvider.java:40)
at at org.slf4j.LoggerFactory.bind(LoggerFactory.java:153)
at at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:141)
at at org.slf4j.LoggerFactory.getProvider(LoggerFactory.java:419)
at at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:405)
at at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:354)
at at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:380)
at at com.example.app.handlers.LoggingHandler.(LoggingHandler.java:13)
at at java.lang.Class.forName0(Native Method)
at at java.lang.Class.forName(Class.java:348)
at at lambdainternal.HandlerInfo.fromString(HandlerInfo.java:33)
at at lambdainternal.AWSLambda.findUserMethods(AWSLambda.java:114)
at at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:241)
at at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:208)
at at lambdainternal.AWSLambda.main(AWSLambda.java:198)
Caused by: java.lang.UnsupportedOperationException: one cannot set the layout of ch.qos.logback.classic.encoder.PatternLayoutEncoder
at at ch.qos.logback.core.pattern.PatternLayoutEncoderBase.setLayout(PatternLayoutEncoderBase.java:62)
at ... 33 common frames omitted
21:17:15,410 |-ERROR in ch.qos.logback.classic.PatternLayout("null") - Empty or null pattern.
21:17:15,410 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
21:17:15,410 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [awslambda] to Logger[ROOT]
21:17:15,412 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
21:17:15,413 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@736e9adb - Registering current configuration as safe fallback point
START RequestId: 7f74005b-6462-4c3d-a042-4c35feb3e196 Version: $LATEST
END RequestId: 7f74005b-6462-4c3d-a042-4c35feb3e196
REPORT RequestId: 7f74005b-6462-4c3d-a042-4c35feb3e196 Duration: 458.65 ms Billed Duration: 459 ms Memory Size: 512 MB Max Memory Used: 94 MB Init Duration: 1003.82 ms

[igorakkerman]

Hi @DevProblems, thanks for your report. I will look into it as soon as possible.