Java Code Examples for ch.qos.logback.core.FileAppender#getFile()

/**
 * Gets the file where the logs are.
 * @return the logs file.
 */
public static File getEndpointLogsFile() {
    Logger rootLogger = (Logger) LoggerFactory.getLogger(ROOT_LOGGER);
    FileAppender<ILoggingEvent> fileAppender = (FileAppender<ILoggingEvent>) rootLogger.getAppender("FILE");

    if(fileAppender != null) {
        return new File(fileAppender.getFile());
    } else {
        return null;
    }
}
 

/**
 * Get the home (absolute path) of the task logs on disk
 *
 * @return the task log home, null if it couldn't be found (usually due to missing appender in logback.xml)
 */
@Nullable
public static String getTaskLogHome() {
  LoggerContext loggerContext = (LoggerContext) StaticLoggerBinder.getSingleton().getLoggerFactory();

  Appender<ILoggingEvent> appender = loggerContext.getLogger(ROOT_LOGGER_NAME).getAppender("tasklogfile");
  if (!(appender instanceof SiftingAppender)) {
    // We are forgiving if the task log appender does not exist. It could be that a user had a customized logback.xml
    // as of 3.4.1 when task logging was introduced. We don't want to block application start in this scenario.
    log.error("Could not find a Logback SiftingAppender named 'tasklogfile' in the logback configuration. " +
       "Please check that the 'tasklogfile' appender exists in logback.xml");
    return null;
  }
  SiftingAppender siftingAppender = (SiftingAppender) appender;

  // this will create a new appender which ultimately creates a temp.log within the tasks log folder
  FileAppender<ILoggingEvent> tempFileAppender = (FileAppender<ILoggingEvent>) siftingAppender.getAppenderTracker()
      .getOrCreate("temp", 0L);

  // Note that at full execution speed the temp.log may not actually exist yet, but we don't actually need it to
  File file = new File(tempFileAppender.getFile());

  String taskLogsFolder = file.getParent();

  // no need to keep the temp.log file around
  tempFileAppender.stop(); // stop the appender to release file lock (windows)
  FileUtils.deleteQuietly(file);

  return taskLogsFolder;
}
 

/**
 * Get the logfile information for the roor logger.
 * 
 * @return List of LogFileInfo obejcts
 */
public static List<LogFileInfo> getLogFileInfos() {
	
	final LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();

	final List<LogFileInfo> logFileInfos = new ArrayList<LogFileInfo>();

	final Logger logger = lc.getLogger(Logger.ROOT_LOGGER_NAME);

	final Iterator<Appender<ILoggingEvent>> it = logger.iteratorForAppenders();

	while (it.hasNext()) {

		final Appender<ILoggingEvent> appender = it.next();

		if (appender instanceof FileAppender) {

			final FileAppender<ILoggingEvent> fileAppender = (FileAppender<ILoggingEvent>) appender;

			final File logFile = new File(fileAppender.getFile());
			final LogFileInfo logFileInfo = new LogFileInfo();

			logFileInfo.setFileName(logFile.getName());
			logFileInfo.setFileLastChanged(new Date(logFile.lastModified()));
			logFileInfo.setFileSize(logFile.length());
			logFileInfos.add(logFileInfo);
		}

	}

	return logFileInfos;
}
 

/**
 * Get the log file.
 * 
 * @param logFileName The name of the log file 
 * @return The actual file
 */
public static File getLogFile(final String logFileName) {

	if (logFileName == null) {
		throw new IllegalArgumentException("logFileName cannot be null.");
	}

	final LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();

	final Logger logger = lc.getLogger(Logger.ROOT_LOGGER_NAME);

	final Iterator<Appender<ILoggingEvent>> it = logger.iteratorForAppenders();

	while (it.hasNext()) {

		final Appender<ILoggingEvent> appender = it.next();

		if (appender instanceof FileAppender) {

			final FileAppender<ILoggingEvent> fileAppender = (FileAppender<ILoggingEvent>) appender;

			final File logFile = new File(fileAppender.getFile());

			if (logFile.getName().equalsIgnoreCase(logFileName)) {
				return logFile;
			}

		}

	}

	return null;
}