Intercept Exception messages for sanitization

[vincent-simpson]

Hi! My use case is to handle some code to remove the new line characters, such as:

throw new RuntimeException("Sanitize \n me");

I've discovered that I can extend the ExtendedThrowableProxyConverter class and override throwableProxyToString, but the IThrowableProxy argument is immutable, so I can't modify it. Ideally, I'd like to avoid having to call super.throwableProxyToString and then parse the response since that will contain the full stack trace, not just the exception message.

My current code:

public class SanitizeExceptionMessageConverter extends ExtendedThrowableProxyConverter {

    @Override
    protected String throwableProxyToString(IThrowableProxy tp) {
        final String original = super.throwableProxyToString(tp);
        return original;
    }
}

Logback config:

    <conversionRule conversionWord="sanitizeExceptionMsg" converterClass="foo.bar.logging.SanitizeExceptionMessageConverter" />
...
    <property name="CONSOLE_LOG_PATTERN" value="${.... omitted for brevity .....%sanitizeExceptionMsg}"/>

Any thoughts? Thank you!