| /******************************************************************************* |
| * Copyright (C) 2007 The University of Manchester |
| * |
| * Modifications to the initial code base are copyright of their |
| * respective authors, or their employers as appropriate. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public License |
| * as published by the Free Software Foundation; either version 2.1 of |
| * the License, or (at your option) any later version. |
| * |
| * 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| ******************************************************************************/ |
| package uk.org.taverna.configuration.app.impl; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Properties; |
| |
| import org.apache.log4j.Level; |
| import org.apache.log4j.LogManager; |
| import org.apache.log4j.PatternLayout; |
| import org.apache.log4j.PropertyConfigurator; |
| import org.apache.log4j.RollingFileAppender; |
| |
| import uk.org.taverna.configuration.app.ApplicationConfiguration; |
| |
| public class Log4JConfiguration { |
| public final static String LOG4J_PROPERTIES = "log4j.properties"; |
| |
| private static boolean log4jConfigured = false; |
| |
| private ApplicationConfiguration applicationConfiguration; |
| |
| private Properties properties ; |
| |
| public Log4JConfiguration() { |
| // prepareLog4J(); |
| } |
| |
| public void prepareLog4J() { |
| if (!log4jConfigured) { |
| Properties log4jProperties = getLogProperties(); |
| if (log4jProperties != null && ! log4jProperties.isEmpty()) { |
| LogManager.resetConfiguration(); |
| PropertyConfigurator.configure(log4jProperties); |
| } |
| |
| String logFilePath = applicationConfiguration.getLogFile().getAbsolutePath(); |
| PatternLayout layout = new PatternLayout("%-5p %d{ISO8601} (%c:%L) - %m%n"); |
| |
| // Add file appender |
| RollingFileAppender appender; |
| try { |
| appender = new RollingFileAppender(layout, logFilePath); |
| appender.setMaxFileSize("1MB"); |
| appender.setEncoding("UTF-8"); |
| appender.setMaxBackupIndex(4); |
| // Let root logger decide level |
| appender.setThreshold(Level.ALL); |
| LogManager.getRootLogger().addAppender(appender); |
| } catch (IOException e) { |
| System.err.println("Could not log to " + logFilePath); |
| } |
| |
| log4jConfigured = true; |
| } |
| } |
| |
| /** |
| * Initialises and provides access to the list of Properties. |
| * @return |
| */ |
| public Properties getLogProperties() { |
| if (properties == null) { |
| InputStream is = getLogPropertiesInputStream(); |
| if (is != null) { |
| try { |
| properties = new Properties(); |
| properties.load(is); |
| // properties.putAll(System.getProperties()); |
| } catch (IOException e) { |
| errorLog("An error occurred trying to load the " + LOG4J_PROPERTIES + " file",e); |
| } |
| } |
| } |
| return properties; |
| } |
| |
| /** |
| * Return an input stream to the configuration file, or null if it can't be found |
| * @return |
| */ |
| private InputStream getLogPropertiesInputStream() { |
| InputStream result = null; |
| File propertiesFile = getLogPropertiesFile(); |
| if (propertiesFile!=null) { |
| try { |
| result=new FileInputStream(propertiesFile); |
| } catch (FileNotFoundException e) { |
| errorLog("Unable to find "+LOG4J_PROPERTIES,e); |
| } |
| } |
| else { |
| errorLog("Unable to determine file for "+LOG4J_PROPERTIES,null); |
| } |
| return result; |
| } |
| |
| /** |
| * Returns a File object to the configuration file or null if it cannot be found. |
| * |
| * @return |
| */ |
| private File getLogPropertiesFile() { |
| File home = applicationConfiguration.getApplicationHomeDir(); |
| File startup = applicationConfiguration.getStartupDir(); |
| File result=null; |
| if (home!=null) { |
| File file = new File(new File(home, ApplicationConfiguration.CONF_DIR), LOG4J_PROPERTIES); |
| if (file.exists()) { |
| result=file; |
| } |
| } |
| if (result==null && startup!=null) { |
| File file = new File(new File(startup, ApplicationConfiguration.CONF_DIR), LOG4J_PROPERTIES); |
| if (file.exists()) { |
| result=file; |
| } |
| } |
| return result; |
| } |
| |
| private void errorLog(String message, Throwable exception) { |
| System.out.println(message); |
| if (exception!=null) { |
| exception.printStackTrace(); |
| } |
| |
| } |
| |
| /** |
| * Sets the applicationConfiguration. |
| * |
| * @param applicationConfiguration the new value of applicationConfiguration |
| */ |
| public void setApplicationConfiguration(ApplicationConfiguration applicationConfiguration) { |
| this.applicationConfiguration = applicationConfiguration; |
| } |
| |
| } |