chemistry-opencmis-workbench/chemistry-opencmis-workbench/src/main/java/org/apache/chemistry/opencmis/workbench/ClientWriterAppender.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.chemistry.opencmis.workbench;

import java.io.Serializable;

import javax.swing.JTextArea;
import javax.swing.SwingUtilities;

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.StringLayout;
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;

@Plugin(name = "ClientWriterAppender", category = "Core", elementType = "appender")
public class ClientWriterAppender extends AbstractAppender {

    protected ClientWriterAppender(final String name, final Filter filter, final Layout<? extends Serializable> layout) {
        super(name, filter, layout);
    }

    private static final long serialVersionUID = 1L;

    private static JTextArea logTextArea = null;

    public static void setTextArea(JTextArea textArea) {
        logTextArea = textArea;
    }

    @Override
    public void append(LogEvent event) {
        if (logTextArea == null) {
            return;
        }

        final String message = ((StringLayout) getLayout()).toSerializable(event);

        if (message.length() > 0) {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    logTextArea.append(message);
                }
            });
        }
    }

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

        if (name == null) {
            LOGGER.error("No name provided for ClientWriterAppender");
            return null;
        }

        if (layout == null) {
            layout = PatternLayout.createDefaultLayout();
        }

        return new ClientWriterAppender(name, filter, (StringLayout) layout);
    }
}