org.apache.log4j.FileAppender Java Exaples

Source File: Log4jLoggerAdapter.java From dubbox-hystrix with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public Log4jLoggerAdapter() {
	try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
           if (logger != null) {
               Enumeration<Appender> appenders = logger.getAllAppenders();
               if (appenders != null) {
                   while (appenders.hasMoreElements()) {
                       Appender appender = appenders.nextElement();
                       if (appender instanceof FileAppender) {
                           FileAppender fileAppender = (FileAppender)appender;
                           String filename = fileAppender.getFile();
                           file = new File(filename);
                           break;
                       }
                   }
               }
           }
       } catch (Throwable t) {
       }
}

Source File: CoasterService.java From swift-k with Apache License 2.0

6 votes

@SuppressWarnings("rawtypes")
protected static Appender getFileAppender() {
    Logger root = Logger.getRootLogger();
    Enumeration e = root.getAllAppenders();
    while (e.hasMoreElements()) {
        Appender a = (Appender) e.nextElement();
        if (a instanceof FileAppender) {
            return a;
        }
        if (a instanceof AsyncAppender) {
            // likely this is running in a JVM in which
            // the file appender has been replaced with
            // an async appender, so don't mess with things
            return null;
        }
    }
    logger.warn("Could not find a file appender to configure");
    return null;
}

Source File: Ase.java From systemsgenetics with GNU General Public License v3.0

6 votes

private static void startLogging(File logFile, boolean debugMode) {

		try {
			FileAppender logAppender = new FileAppender(new SimpleLayout(), logFile.getCanonicalPath(), false);
			Logger.getRootLogger().removeAllAppenders();
			Logger.getRootLogger().addAppender(logAppender);
			if (debugMode) {
				LOGGER.setLevel(Level.DEBUG);
			} else {
				LOGGER.setLevel(Level.INFO);
			}
		} catch (IOException e) {
			System.err.println("Failed to create logger: " + e.getMessage());
			System.exit(1);
		}

		LOGGER.info(
				"\n" + HEADER);
		LOGGER.info("Version: " + VERSION);
		LOGGER.info("Current date and time: " + DATE_TIME_FORMAT.format(currentDataTime));
		LOGGER.info("Log level: " + LOGGER.getLevel());

		System.out.println("Started logging");
		System.out.println();
	}

Source File: Log4jLoggerAdapter.java From tddl5 with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public Log4jLoggerAdapter(){
    try {
        org.apache.log4j.Logger logger = LogManager.getRootLogger();
        if (logger != null) {
            Enumeration<Appender> appenders = logger.getAllAppenders();
            if (appenders != null) {
                while (appenders.hasMoreElements()) {
                    Appender appender = appenders.nextElement();
                    if (appender instanceof FileAppender) {
                        FileAppender fileAppender = (FileAppender) appender;
                        String filename = fileAppender.getFile();
                        file = new File(filename);
                        break;
                    }
                }
            }
        }
    } catch (Throwable t) {
    }
}

Source File: Logging.java From swift-t with Apache License 2.0

6 votes

private static void setupLoggingToFile(Logger stcLogger, String logfile,
    boolean trace) {
  Layout layout = new PatternLayout("%-5p %m%n");
  boolean append = false;
  try {
    FileAppender appender = new FileAppender(layout, logfile, append);
    Level threshold;
    if (trace) {
      threshold = Level.TRACE;
    } else {
      threshold = Level.DEBUG;
    }
    appender.setThreshold(threshold);
    stcLogger.addAppender(appender);
    stcLogger.setLevel(threshold);
  } catch (IOException e) {
    System.out.println(e.getMessage());
    System.exit(ExitCode.ERROR_IO.code());
  }
}

Source File: PreLaunchUpdateApplication.java From bigtable-sql with Apache License 2.0

6 votes

private static void initializeLogger() throws IOException
{
	String logConfigFileName = ApplicationArguments.getInstance().getLoggingConfigFileName();
	if (logConfigFileName != null) {
		PropertyConfigurator.configure(logConfigFileName);
	} else {
		ApplicationFiles appFiles = new ApplicationFiles();
		
		String logMessagePattern = "%-4r [%t] %-5p %c %x - %m%n";
		Layout layout = new PatternLayout(logMessagePattern);
		
		File logsDir = new File(appFiles.getUserSettingsDirectory(), "logs");
		File updateLogFile = new File(logsDir, "updater.log");
		
		FileAppender appender = new FileAppender(layout, updateLogFile.getAbsolutePath());
		
		LoggerController.registerLoggerFactory(new SquirrelLoggerFactory(appender, false));
	}
}

Source File: RdfSClassGenerator.java From semweb4j with BSD 2-Clause "Simplified" License

6 votes

private void generateCode() throws MojoExecutionException, MojoFailureException {
	try {
	    // make sure that directory for log file exists.
	    rdfReactorLogfile.getParentFile().mkdirs();
		
	    // configure logging infrastructure for RDFReactor
	    FileAppender logFileAppender = new FileAppender(new SimpleLayout(), rdfReactorLogfile.getAbsolutePath());
		BasicConfigurator.configure(logFileAppender);

	} catch (IOException ioe) {
		throw new MojoExecutionException("Cannot open log file for writing RDFReactor log messages", ioe);
	}

	getLog().info("Generating code from RDF schema file " + schemaFile + " into dir " + outputDirectory
			+ ". Classes will be in package " + packageName + " and with method prefix " + methodPrefix +". skipBuiltins is " + skipBuiltins + ".");
	getLog().info("RDFReactor's log messages are written to " + rdfReactorLogfile);


	try {
		CodeGenerator.generate(schemaFile.getAbsolutePath(), outputDirectory.getAbsolutePath(), packageName, Reasoning.rdfs, skipBuiltins, methodPrefix);
	} catch (Exception e) {
		e.printStackTrace();
	    throw new MojoFailureException(e, "RDFS processing error", "Could not generate code from the specified RDF schema file.");
	}
}

Source File: TimelineMetricConfiguration.java From ambari-metrics with Apache License 2.0

6 votes

public String getDefaultMetricsSinkDir() {
  String dirPath = metricsConf.get(DEFAULT_EXTERNAL_SINK_DIR);
  if (dirPath == null) {
    // Only one logger at the time of writing
    Appender appender = (Appender) Logger.getRootLogger().getAllAppenders().nextElement();
    if (appender instanceof FileAppender) {
      File f = new File(((FileAppender) appender).getFile());
      if (f.exists()) {
        dirPath = f.getParent();
      } else {
        dirPath = "/tmp";
      }
    }
  }

  return dirPath;
}

Source File: Log4jLoggerAdapter.java From dubbox with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public Log4jLoggerAdapter() {
	try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
           if (logger != null) {
               Enumeration<Appender> appenders = logger.getAllAppenders();
               if (appenders != null) {
                   while (appenders.hasMoreElements()) {
                       Appender appender = appenders.nextElement();
                       if (appender instanceof FileAppender) {
                           FileAppender fileAppender = (FileAppender)appender;
                           String filename = fileAppender.getFile();
                           file = new File(filename);
                           break;
                       }
                   }
               }
           }
       } catch (Throwable t) {
       }
}

Source File: MR4CLogging.java From mr4c with Apache License 2.0

6 votes

private Set<File> extractAppenderFiles(org.apache.log4j.Logger logger) {
	Set<File> result = new HashSet<File>();
	Enumeration<Appender> e = logger.getAllAppenders();
	while ( e.hasMoreElements() ) {
		Appender app = e.nextElement();
		if (app instanceof FileAppender ) {
			FileAppender fileApp = (FileAppender) app;
			String filePath = fileApp.getFile();
			if ( filePath==null ) {
				m_logger.warn("Logger {} has file appender {}  with no file", logger.getName(), app.getName());
			} else {
				result.add(new File(filePath));
			}
		}
	}
	return result;
}

Source File: Log4jLoggerAdapter.java From light-task-scheduler with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public Log4jLoggerAdapter() {
	try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
           if (logger != null) {
               Enumeration<Appender> appenders = logger.getAllAppenders();
               if (appenders != null) {
                   while (appenders.hasMoreElements()) {
                       Appender appender = appenders.nextElement();
                       if (appender instanceof FileAppender) {
                           FileAppender fileAppender = (FileAppender)appender;
                           String filename = fileAppender.getFile();
                           file = new File(filename);
                           break;
                       }
                   }
               }
           }
       } catch (Throwable t) {
       }
}

Source File: LogPageHandler.java From dubbox with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public LogPageHandler() {
    try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
        if (logger != null) {
            Enumeration<Appender> appenders = logger.getAllAppenders();
            if (appenders != null) {
                while (appenders.hasMoreElements()) {
                    Appender appender = appenders.nextElement();
                    if (appender instanceof FileAppender) {
                        FileAppender fileAppender = (FileAppender)appender;
                        String filename = fileAppender.getFile();
                        file = new File(filename);
                        break;
                    }
                }
            }
        }
    } catch (Throwable t) {
    }
   }

Source File: TaskLogger.java From scheduling with GNU Affero General Public License v3.0

6 votes

public File createFileAppender(File pathToFolder) throws IOException {
    if (taskLogAppender.getAppender(FILE_APPENDER_NAME) != null) {
        throw new IllegalStateException("Only one file appender can be created");
    }

    File logFile = new File(pathToFolder, new TaskLoggerRelativePathGenerator(taskId).getRelativePath());
    boolean append = true;
    if (!logFile.exists()) {
        append = false;
        logFile.getParentFile().mkdirs();

        FileUtils.touch(logFile);
    }

    logFile.setWritable(true, false);

    FileAppender fap = new FileAppender(Log4JTaskLogs.getTaskLogLayout(), logFile.getAbsolutePath(), append);
    fap.setName(FILE_APPENDER_NAME);
    taskLogAppender.addAppender(fap);

    return logFile;
}

Source File: LogPageHandler.java From dubbox-hystrix with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public LogPageHandler() {
    try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
        if (logger != null) {
            Enumeration<Appender> appenders = logger.getAllAppenders();
            if (appenders != null) {
                while (appenders.hasMoreElements()) {
                    Appender appender = appenders.nextElement();
                    if (appender instanceof FileAppender) {
                        FileAppender fileAppender = (FileAppender)appender;
                        String filename = fileAppender.getFile();
                        file = new File(filename);
                        break;
                    }
                }
            }
        }
    } catch (Throwable t) {
    }
   }

Source File: ActiveActor.java From scheduling with GNU Affero General Public License v3.0

6 votes

private void addHostToFilename(FileAppender fileApp) {
    String hostID = Math.abs(UniqueID.getCurrentVMID().hashCode() % 100000) + "-" +
                    ProActiveInet.getInstance().getHostname();
    String fileName = fileApp.getFile();
    File filePath = new File(fileName);
    String hostFileName;
    String name = filePath.getName();
    String pathToFile = filePath.getParent();
    int point = name.indexOf('.');
    if (point == -1) {
        hostFileName = fileName + "-" + hostID;
    } else {
        String extension = name.substring(point + 1);
        String nameNoExtension = name.substring(0, point);
        hostFileName = (pathToFile != null ? pathToFile : "") + File.separator + nameNoExtension + "-" + hostID +
                       "." + extension;
    }
    System.out.println("New output file:" + hostFileName);
    fileApp.setFile(hostFileName);
    fileApp.activateOptions();
}

Source File: SystemLogPage.java From nextreports-server with Apache License 2.0

6 votes

public SystemLogPage() {
	super();
	
	WebMarkupContainer cssContainer = new WebMarkupContainer("cssPath");
       cssContainer.add(new AttributeModifier("href", ThemesManager.getInstance().getThemeRelativePathCss()));
       add(cssContainer);
	
	FileAppender appender = (FileAppender) LogManager.getRootLogger().getAppender("FILE");
	File logFile = new File(appender.getFile());
	
	String content;
	try {
		content = FileUtils.readFileToString(logFile);
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
		content = e.toString();
	}
	
	add(new Label("size", FileUtils.byteCountToDisplaySize(logFile.length())));
	add(new Label("lastModified", new Date(logFile.lastModified()).toString()));
	add(new MultiLineLabel("log", content));
}

Source File: Log4jHookProxy.java From uavstack with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
private LinkedList<LogProfileInfo> figureoutLogConfiguration(Logger Logger, String appid) {
    
    LinkedList<LogProfileInfo> logProfiles = new LinkedList<LogProfileInfo>();

    Enumeration<Appender> appenders = Logger.getAllAppenders();
    while (appenders != null && appenders.hasMoreElements()) {

        Appender appender = appenders.nextElement();
        if (appender instanceof FileAppender) {
            logProfiles.add(getAppenderInfo((FileAppender)appender, appid));
        }
        else if(appender instanceof AsyncAppender) {
            Enumeration<Appender> ads = ((AsyncAppender) appender).getAllAppenders();
            while(ads != null && ads.hasMoreElements()) {
                Appender ap = ads.nextElement();
                if(ap instanceof FileAppender) {
                    logProfiles.add(getAppenderInfo((FileAppender)ap, appid));
                }
            }
        }
    }
    
    return logProfiles;
}

Source File: ActiveActor.java From scheduling with GNU Affero General Public License v3.0

6 votes

/**
 * Log4j configuration tweaking
 * This method will modify the file name of every FileAppender
 * 	by adding the hostname of the machine onto which it executes.
 * Because it cannot be done from the log4j-configuration file
 * 	we hard-code this configuration issue
 * @param logger2 
 */
private void rebaseLogFiles() {
    Enumeration<Logger> curLoggers = LogManager.getCurrentLoggers();
    while (curLoggers.hasMoreElements()) {
        Logger someLogger = curLoggers.nextElement();
        Enumeration<Appender> appenders = someLogger.getAllAppenders();
        while (appenders.hasMoreElements()) {
            Appender app = appenders.nextElement();
            if (app instanceof FileAppender) {
                FileAppender fileApp = (FileAppender) app;
                System.out.println("File appender, output file " + fileApp.getFile());
                addHostToFilename(fileApp);
            }
        }
    }
}

Source File: Test.java From cpsolver with GNU Lesser General Public License v3.0

6 votes

/**
 * Setup log4j logging
 * 
 * @param logFile  log file
 */
public static void setupLogging(File logFile) {
    Logger root = Logger.getRootLogger();
    ConsoleAppender console = new ConsoleAppender(new PatternLayout("[%t] %m%n"));
    console.setThreshold(Level.INFO);
    root.addAppender(console);
    if (logFile != null) {
        try {
            FileAppender file = new FileAppender(new PatternLayout("%d{dd-MMM-yy HH:mm:ss.SSS} [%t] %-5p %c{2}> %m%n"), logFile.getPath(), false);
            file.setThreshold(Level.DEBUG);
            root.addAppender(file);
        } catch (IOException e) {
            sLog.fatal("Unable to configure logging, reason: " + e.getMessage(), e);
        }
    }
}

Source File: TestAutoLocalMode.java From spork with Apache License 2.0

6 votes

@Before
public void setUp() throws Exception{
    pigServer = new PigServer(ExecType.MAPREDUCE, cluster.getProperties());
    pigServer.getPigContext().getExecutionEngine().setProperty(PigConfiguration.PIG_OPT_FETCH, "false");
    pigServer.getPigContext().getExecutionEngine().setProperty(PigConfiguration.PIG_AUTO_LOCAL_ENABLED, String.valueOf("true"));
    pigServer.getPigContext().getExecutionEngine().setProperty(PigConfiguration.PIG_AUTO_LOCAL_INPUT_MAXBYTES, "200");

    Logger logger = Logger.getLogger(JobControlCompiler.class);
    logger.removeAllAppenders();
    logger.setLevel(Level.INFO);
    SimpleLayout layout = new SimpleLayout();
    logFile = File.createTempFile("log", "");
    FileAppender appender = new FileAppender(layout, logFile.toString(), false, false, 0);
    logger.addAppender(appender);

    miniFileName = createInputFile("miniFile", 10).getAbsolutePath();
    smallFileName = createInputFile("smallFile", 100).getAbsolutePath();
    bigFileName = createInputFile("bigFile", 1000).getAbsolutePath();
}

Source File: Test.java From cpsolver with GNU Lesser General Public License v3.0

6 votes

/**
 * Setup log4j logging
 * 
 * @param logFile  log file
 * @param debug true if debug messages should be logged (use -Ddebug=true to enable debug message)
 */
public static void setupLogging(File logFile, boolean debug) {
    Logger root = Logger.getRootLogger();
    ConsoleAppender console = new ConsoleAppender(new PatternLayout("[%t] %m%n"));
    console.setThreshold(Level.INFO);
    root.addAppender(console);
    if (logFile != null) {
        try {
            FileAppender file = new FileAppender(new PatternLayout("%d{dd-MMM-yy HH:mm:ss.SSS} [%t] %-5p %c{2}> %m%n"), logFile.getPath(), false);
            file.setThreshold(Level.DEBUG);
            root.addAppender(file);
        } catch (IOException e) {
            sLogger.fatal("Unable to configure logging, reason: " + e.getMessage(), e);
        }
    }
    if (!debug)
        root.setLevel(Level.INFO);
}

Source File: LogPageHandler.java From dubbox with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public LogPageHandler() {
    try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
        if (logger != null) {
            Enumeration<Appender> appenders = logger.getAllAppenders();
            if (appenders != null) {
                while (appenders.hasMoreElements()) {
                    Appender appender = appenders.nextElement();
                    if (appender instanceof FileAppender) {
                        FileAppender fileAppender = (FileAppender)appender;
                        String filename = fileAppender.getFile();
                        file = new File(filename);
                        break;
                    }
                }
            }
        }
    } catch (Throwable t) {
    }
   }

Source File: Log4jLoggerAdapter.java From dubbox with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public Log4jLoggerAdapter() {
	try {
		org.apache.log4j.Logger logger = LogManager.getRootLogger();
           if (logger != null) {
               Enumeration<Appender> appenders = logger.getAllAppenders();
               if (appenders != null) {
                   while (appenders.hasMoreElements()) {
                       Appender appender = appenders.nextElement();
                       if (appender instanceof FileAppender) {
                           FileAppender fileAppender = (FileAppender)appender;
                           String filename = fileAppender.getFile();
                           file = new File(filename);
                           break;
                       }
                   }
               }
           }
       } catch (Throwable t) {
       }
}

Source File: Action.java From charles-rest with BSD 3-Clause "New" or "Revised" License

6 votes

/**
 * Setup the Log4J logger for this action thread.
 * @return String path to log file
 * @throws IOException If there's something wrong with the FileAppender.
 */
private void setupLog4jForAction() throws IOException {
    String loggerName = "Action_" + this.id;
    org.apache.log4j.Logger log4jLogger = org.apache.log4j.Logger.getLogger("Action_" + this.id);
    String logRoot = System.getProperty("LOG_ROOT");
    if(logRoot == null) {
        logRoot = ".";
    }
    String logFilePath = logRoot + "/charles-rest/ActionsLogs/" + this.id + ".log";
    
    File logFile = new File(logFilePath);
    logFile.getParentFile().mkdirs();
    logFile.createNewFile();//you have to create the file yourself since FileAppender acts funny under linux if the file doesn't already exist.

    FileAppender fa = new FileAppender(new PatternLayout("%d %p - %m%n"), logFilePath);
    fa.setName(this.id + "_appender");
    fa.setThreshold(Level.DEBUG);
    log4jLogger.addAppender(fa);
    log4jLogger.setLevel(Level.DEBUG);
    
    this.logger = LoggerFactory.getLogger(loggerName);
    
}

Source File: RhnJavaJob.java From spacewalk with GNU General Public License v2.0

6 votes

void enableLogging(TaskoRun run) {
    PatternLayout pattern = new PatternLayout(DEFAULT_LOGGING_LAYOUT);
    try {
        getLogger().removeAllAppenders();
        FileAppender outLogAppender = new FileAppender(pattern,
                run.buildStdOutputLogPath());
        outLogAppender.setThreshold(Level.INFO);
        getLogger().addAppender(outLogAppender);
        FileAppender errLogAppender = new FileAppender(pattern,
                run.buildStdErrorLogPath());
        errLogAppender.setThreshold(Level.ERROR);
        getLogger().addAppender(errLogAppender);
    }
    catch (IOException e) {
        getLogger().warn("Logging to file disabled");
        e.printStackTrace();
    }
}

Source File: Log4jLoggerAdapter.java From tddl with Apache License 2.0

6 votes

@SuppressWarnings("unchecked")
public Log4jLoggerAdapter(){
    try {
        org.apache.log4j.Logger logger = LogManager.getRootLogger();
        if (logger != null) {
            Enumeration<Appender> appenders = logger.getAllAppenders();
            if (appenders != null) {
                while (appenders.hasMoreElements()) {
                    Appender appender = appenders.nextElement();
                    if (appender instanceof FileAppender) {
                        FileAppender fileAppender = (FileAppender) appender;
                        String filename = fileAppender.getFile();
                        file = new File(filename);
                        break;
                    }
                }
            }
        }
    } catch (Throwable t) {
    }
}

Source File: XMLLayoutTestCase.java From cacheonix-core with GNU Lesser General Public License v2.1

6 votes

public void testMDCEscaped() throws Exception {
  XMLLayout xmlLayout = new XMLLayout();
  xmlLayout.setProperties(true);
  root.addAppender(new FileAppender(xmlLayout, TEMP, false));

  Hashtable context = MDC.getContext();
  if (context != null) {
      context.clear();
  }
  MDC.put("blahAttribute", "<blah value='blah'>");
  MDC.put("<blahKey value='blah'/>", "blahValue");

  logger.debug("Hello");
  Transformer.transform(
    TEMP, FILTERED,
    new Filter[] { new LineNumberFilter(),
        new JunitTestRunnerFilter(),
        new XMLTimestampFilter() });
  assertTrue(Compare.compare(FILTERED, "witness/xmlLayout.mdc.2"));
}

Source File: XMLLayoutTestCase.java From cacheonix-core with GNU Lesser General Public License v2.1

6 votes

public void locationInfo() throws Exception {
  XMLLayout xmlLayout = new XMLLayout();
  xmlLayout.setLocationInfo(true);
  root.addAppender(new FileAppender(xmlLayout, TEMP, false));
  common();
  Transformer.transform(
    TEMP, FILTERED,
    new Filter[] {
      new LineNumberFilter(),
      new XMLTimestampFilter(), 
      new XMLLineAttributeFilter(),
      new JunitTestRunnerFilter(),
      new SunReflectFilter()
    });
  assertTrue(Compare.compare(FILTERED, "witness/xmlLayout.2"));
}

Source File: Main.java From systemsgenetics with GNU General Public License v3.0

6 votes

private static void startLogging(File logFile, boolean debugMode) {

        try {
            FileAppender logAppender = new FileAppender(new SimpleLayout(), logFile.getCanonicalPath(), false);
            Logger.getRootLogger().removeAllAppenders();
            Logger.getRootLogger().addAppender(logAppender);
            if (debugMode) {
                LOGGER.setLevel(Level.DEBUG);
            } else {
                LOGGER.setLevel(Level.INFO);
            }
        } catch (IOException e) {
            System.err.println("Failed to create logger: " + e.getMessage());
            System.exit(1);
        }

        LOGGER.info(
                "\n" + HEADER);
        LOGGER.info("Version: " + VERSION);
        LOGGER.info("Current date and time: " + DATE_TIME_FORMAT.format(currentDataTime));
        LOGGER.info("Log level: " + LOGGER.getLevel());

        System.out.println("Started logging");
        System.out.println();
    }

Source File: XMLLayoutTestCase.java From cacheonix-core with GNU Lesser General Public License v2.1

6 votes

public void testNull() throws Exception {
  XMLLayout xmlLayout = new XMLLayout();
  root.addAppender(new FileAppender(xmlLayout, TEMP, false));

  String oldThreadName = Thread.currentThread().getName();
  Thread.currentThread().setName("main");

  logger.debug("hi");
  logger.debug(null);
  Exception e = new Exception((String) null);
  logger.debug("hi", e);

  Thread.currentThread().setName(oldThreadName);

  Transformer.transform(
    TEMP, FILTERED,
    new Filter[] { new LineNumberFilter(),
        new XMLTimestampFilter(),  
        new JunitTestRunnerFilter(),
        new SunReflectFilter()});
  assertTrue(Compare.compare(FILTERED, "witness/xmlLayout.null"));
}

org.apache.log4j.FileAppender Java Examples