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Logback appender for sending GELF messages with zero additional dependencies.

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/*
 * Logback GELF - zero dependencies Logback GELF appender library.
 * Copyright (C) 2016 Oliver Siegmar
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package de.siegmar.logbackgelf.mappers;

import java.util.Optional;
import java.util.function.BiConsumer;

import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.IThrowableProxy;
import de.siegmar.logbackgelf.GelfFieldMapper;

public class RootExceptionDataFieldMapper implements GelfFieldMapper {

    @Override
    public void mapField(final ILoggingEvent event, final BiConsumer valueHandler) {
        Optional.ofNullable(getRootException(event.getThrowableProxy()))
            .ifPresent(rootException -> {
                valueHandler.accept("root_cause_class_name", rootException.getClassName());
                valueHandler.accept("root_cause_message", rootException.getMessage());
            });
    }

    private IThrowableProxy getRootException(final IThrowableProxy throwableProxy) {
        if (throwableProxy == null) {
            return null;
        }

        IThrowableProxy rootCause = throwableProxy;
        while (rootCause.getCause() != null) {
            rootCause = rootCause.getCause();
        }

        return rootCause;
    }

}
    

    

    

            

    

            



    
    






    
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