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A base library to simplify the creation of Graviton queue workers.

There is a newer version: 0.26.0

package com.github.libgraviton.workerbase.logging;

import ch.qos.logback.classic.pattern.ClassicConverter;
import ch.qos.logback.classic.spi.ILoggingEvent;

import java.util.List;

/**
 * Allows to truncate the message size and add a postfix to mark the message visibly as truncated.
 *
 * @author List of contributors {@literal }
 * @see http://swisscom.ch
 * @version $Id: $Id
 */
public class TruncatedMessageConverter extends ClassicConverter {

    @Override
    public String convert(ILoggingEvent event) {
        if(getOptions().size() != 2) {
            throw new IllegalArgumentException("Expected 2 arguments but got " + getOptionList().size() + ".");
        }

        int maxMessageLength = Integer.parseInt(getOptions().get(0));
        String postfix = getOptions().get(1);
        String message = event.getFormattedMessage();

        if (message.length() >= maxMessageLength) {
            message = message.substring(0, maxMessageLength) + " " + postfix;
        }

        return message;
    }

    /**
     * For some reason getOptionList() is protected. With getOptions() it's exposed and testable.
     */
    public List getOptions() {
        return getOptionList();
    }
}