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Tomcat85 Slf4j Logback Integration

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/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package org.apache.juli.logging.ch.qos.logback.classic.helpers;

import java.util.ArrayList;
import java.util.List;

import org.apache.juli.logging.ch.qos.logback.classic.PatternLayout;
import org.apache.juli.logging.ch.qos.logback.classic.spi.ILoggingEvent;
import org.apache.juli.logging.ch.qos.logback.core.AppenderBase;

/**
 * An appender used for testing.
 * 
 * @author ceki
 * @param 
 * @since 1.3.0
 */
public class WithLayoutListAppender extends AppenderBase {

    public List list = new ArrayList<>();

    String pattern;

    PatternLayout patternLayout;

    @Override
    public void start() {
        if (pattern == null) {
            addError("null pattern disallowed");
            return;
        }
        patternLayout = new PatternLayout();
        patternLayout.setContext(context);
        patternLayout.setPattern(pattern);
        patternLayout.start();
        if (patternLayout.isStarted())
            super.start();
    }

    protected void append(ILoggingEvent e) {
        String result = patternLayout.doLayout(e);
        list.add(result);
    }

    public String getPattern() {
        return pattern;
    }

    public void setPattern(String pattern) {
        this.pattern = pattern;
    }

}