log4j-core/src/main/java/org/apache/logging/log4j/core/appender/AbstractFileAppender.java [164:200]:
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            final String filename,
            final boolean ignoreExceptions,
            final boolean immediateFlush,
            final Advertiser advertiser,
            final Property[] properties) {

        super(name, layout, filter, ignoreExceptions, immediateFlush, properties, manager);
        if (advertiser != null) {
            final Map<String, String> configuration = new HashMap<>(layout.getContentFormat());
            configuration.putAll(manager.getContentFormat());
            configuration.put("contentType", layout.getContentType());
            configuration.put("name", name);
            advertisement = advertiser.advertise(configuration);
        } else {
            advertisement = null;
        }
        this.fileName = filename;
        this.advertiser = advertiser;
    }

    /**
     * Returns the file name this appender is associated with.
     * @return The File name.
     */
    public String getFileName() {
        return this.fileName;
    }

    @Override
    public boolean stop(final long timeout, final TimeUnit timeUnit) {
        setStopping();
        super.stop(timeout, timeUnit, false);
        if (advertiser != null) {
            advertiser.unadvertise(advertisement);
        }
        setStopped();
        return true;
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log4j-core/src/main/java/org/apache/logging/log4j/core/appender/FileAppender.java [287:323]:
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            final String filename,
            final boolean ignoreExceptions,
            final boolean immediateFlush,
            final Advertiser advertiser,
            final Property[] properties) {

        super(name, layout, filter, ignoreExceptions, immediateFlush, properties, manager);
        if (advertiser != null) {
            final Map<String, String> configuration = new HashMap<>(layout.getContentFormat());
            configuration.putAll(manager.getContentFormat());
            configuration.put("contentType", layout.getContentType());
            configuration.put("name", name);
            advertisement = advertiser.advertise(configuration);
        } else {
            advertisement = null;
        }
        this.fileName = filename;
        this.advertiser = advertiser;
    }

    /**
     * Returns the file name this appender is associated with.
     * @return The File name.
     */
    public String getFileName() {
        return this.fileName;
    }

    @Override
    public boolean stop(final long timeout, final TimeUnit timeUnit) {
        setStopping();
        super.stop(timeout, timeUnit, false);
        if (advertiser != null) {
            advertiser.unadvertise(advertisement);
        }
        setStopped();
        return true;
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