| /** |
| ******************************************************************************** |
| * Copyright (c) 2019 Robert Bosch GmbH and others. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Robert Bosch GmbH - initial API and implementation |
| ******************************************************************************** |
| */ |
| package org.eclipse.app4mc.transformation.log4j.headless.configuration; |
| |
| import java.io.File; |
| |
| import org.apache.log4j.FileAppender; |
| |
| /** |
| * Custom Log4j appender that is writing log statements to a dedicated log file |
| * if the system property <i>OUTPUT_DIRECTORY</i> is set. With this mechanism it |
| * is possible to write a log file per migration session to a dedicated log file |
| * only. |
| */ |
| public class TransformationFileAppender extends FileAppender { |
| |
| |
| @Override |
| protected boolean checkEntryConditions() { |
| // we only append if an output directory is set |
| String logFilePath = System.getProperty("APP4MC_TRANSFORMATION_LOG_FILE"); |
| if (logFilePath != null) { |
| if (new File(logFilePath).canWrite()==false) { |
| return false; |
| } |
| super.setFile(logFilePath); |
| super.activateOptions(); |
| |
| return super.checkEntryConditions(); |
| } |
| return false; |
| } |
| |
| |
| |
| @Override |
| public void activateOptions() { |
| // simply avoid the log warning for missing fileName configuration |
| if (fileName != null) { |
| super.activateOptions(); |
| } |
| } |
| |
| |
| } |
