http://www.dropwizard.io/2.0.18/dropwizard-bom/dropwizard-dependencies/dropwizard-parent/dropwizard-logging: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.logging;

import ch.qos.logback.classic.pattern.ExtendedThrowableProxyConverter;
import ch.qos.logback.classic.spi.StackTraceElementProxy;
import ch.qos.logback.classic.spi.ThrowableProxyUtil;


An ExtendedThrowableProxyConverter which prefixes stack traces with !. 
/**
 * An {@link ExtendedThrowableProxyConverter} which prefixes stack traces with {@code !}.
 */
public class PrefixedExtendedThrowableProxyConverter extends PrefixedThrowableProxyConverter {
    @Override
    protected void extraData(StringBuilder builder, StackTraceElementProxy step) {
        if (step != null) {
            ThrowableProxyUtil.subjoinPackagingData(builder, step);
        }
    }
}