dpfmanager.shell.core.util.TextAreaAppender.java Source code

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Here is the source code for dpfmanager.shell.core.util.TextAreaAppender.java

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/**
 * <h1>TextAreaAppender.java</h1> <p> This program is free software: you can redistribute it
 * and/or modify it under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version; or,
 * at your choice, under the terms of the Mozilla Public License, v. 2.0. SPDX GPL-3.0+ or MPL-2.0+.
 * </p> <p> This program 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 General Public License and the Mozilla Public License for more details. </p>
 * <p> You should have received a copy of the GNU General Public License and the Mozilla Public
 * License along with this program. If not, see <a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>
 * and at <a href="http://mozilla.org/MPL/2.0">http://mozilla.org/MPL/2.0</a> . </p> <p> NB: for the
 *  statement, include Easy Innova SL or other company/Person contributing the code. </p> <p> 
 * 2015 Easy Innova, SL </p>
 *
 * @author Adri Llorens
 * @version 1.0
 * @since 23/7/2015
 */

package dpfmanager.shell.core.util;

import javafx.application.Platform;
import javafx.scene.control.TextArea;

import org.apache.commons.lang.StringUtils;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.appender.AbstractAppender;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.layout.PatternLayout;

/**
 * Created by Adri Llorens on 21/03/2016.
 */
@Plugin(name = "TextAreaAppender", category = "Core", elementType = "appender", printObject = true)
public class TextAreaAppender extends AbstractAppender {

    private static final long serialVersionUID = 1L;
    private static volatile TextArea textArea = null;

    private int maxLines = 0;

    protected TextAreaAppender(String name, Layout<?> layout, Filter filter, int maxLines,
            boolean ignoreExceptions) {
        super(name, filter, layout, ignoreExceptions);
        this.maxLines = maxLines;
    }

    @PluginFactory
    public static TextAreaAppender createAppender(@PluginAttribute("name") String name,
            @PluginAttribute("maxLines") int maxLines,
            @PluginAttribute("ignoreExceptions") boolean ignoreExceptions,
            @PluginElement("Layout") Layout<?> layout, @PluginElement("Filters") Filter filter) {

        if (name == null) {
            return null;
        }

        if (layout == null) {
            layout = PatternLayout.createDefaultLayout();
        }
        return new TextAreaAppender(name, layout, filter, maxLines, ignoreExceptions);
    }

    @Override
    public void append(LogEvent event) {
        if (textArea != null) {
            Layout layout = this.getLayout();
            Platform.runLater(new Runnable() {
                @Override
                public void run() {
                    String message = new String(layout.toByteArray(event));
                    int count = StringUtils.countMatches(textArea.getText(), "\n");
                    if (count < maxLines && maxLines != 0) {
                        textArea.appendText(message);
                    } else {
                        textArea.clear();
                        textArea.autosize();
                        textArea.appendText(message);
                    }
                }
            });
        }

    }

    // Add the target TextArea to be populated and updated by the logging information.
    public static void setTextArea(final TextArea ta) {
        textArea = ta;
    }

    public static boolean hasTextArea() {
        return textArea != null;
    }
}