001/*
002 *  Copyright 2017 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.runtime.log;
017
018import org.apache.log4j.Appender;
019import org.apache.log4j.Logger;
020
021import org.ametys.runtime.plugin.ExtensionPoint;
022import org.ametys.runtime.plugin.component.AbstractThreadSafeComponentExtensionPoint;
023
024/**
025 * {@link ExtensionPoint} handling the {@link ExternalLog}s.
026 */
027public class ExternalLogExtensionPoint  extends AbstractThreadSafeComponentExtensionPoint<ExternalLog>
028{
029    /** Avalon Role */
030    public static final String ROLE = ExternalLogExtensionPoint.class.getName();
031    
032    @Override
033    public void initializeExtensions() throws Exception
034    {
035        super.initializeExtensions();
036        MemoryAppender memoryAppender = _getMemoryAppender();
037
038        for (String extensionId : this.getExtensionsIds())
039        {
040            ExternalLog extension = this.getExtension(extensionId);
041            Appender appender = extension.getAppender();
042            org.apache.log4j.Logger category = extension.getCategory();
043            category.addAppender(appender);
044            if (memoryAppender != null && !category.getAdditivity())
045            {
046                category.addAppender(memoryAppender);
047            }
048        }
049    }
050
051    /**
052     * Get the memory-appender
053     * @return the memory appender of the application, or null if none found
054     */
055    private MemoryAppender _getMemoryAppender()
056    {
057        Appender memoryAppender = Logger.getRootLogger().getAppender(org.ametys.plugins.core.ui.log.LogManager.MEMORY_APPENDER_NAME);
058        if (memoryAppender != null && memoryAppender instanceof MemoryAppender)
059        {
060            return (MemoryAppender) memoryAppender;
061        }
062        return null;
063    }
064
065}