Class OneLineFormatter

java/org/apache/juli/OneLineFormatter.java:39–311

 * Date processing based on AccessLogValve.
 */
public class OneLineFormatter extends Formatter {

    private static final Object threadMxBeanLock = new Object();
    private static volatile ThreadMXBean threadMxBean = null;
    private static final int THREAD_NAME_CACHE_SIZE = 10000;
    private static final ThreadLocal<ThreadNameCache> threadNameCache =
            ThreadLocal.withInitial(() -> new ThreadNameCache(THREAD_NAME_CACHE_SIZE));

    /* Timestamp format */
    private static final String DEFAULT_TIME_FORMAT = "dd-MMM-yyyy HH:mm:ss.SSS";

    /**
     * The size of our global date format cache
     */
    private static final int GLOBAL_CACHE_SIZE = 30;

    /**
     * The size of our thread local date format cache
     */
    private static final int LOCAL_CACHE_SIZE = 5;

    /**
     * Thread local date format cache.
     */
    private ThreadLocal<DateFormatCache> localDateCache;

    private volatile MillisHandling millisHandling = MillisHandling.APPEND;


    /**
     * Constructs a OneLineFormatter with the default time format from the log manager properties.
     */
    public OneLineFormatter() {
        String timeFormat = LogManager.getLogManager().getProperty(OneLineFormatter.class.getName() + ".timeFormat");
        if (timeFormat == null) {
            timeFormat = DEFAULT_TIME_FORMAT;
        }
        setTimeFormat(timeFormat);
    }


    /**
     * Specify the time format to use for time stamps in log messages.
     *
     * @param timeFormat The format to use using the {@link java.text.SimpleDateFormat} syntax
     */
    public void setTimeFormat(final String timeFormat) {
        final String cachedTimeFormat;

        if (timeFormat.endsWith(".SSS")) {
            cachedTimeFormat = timeFormat.substring(0, timeFormat.length() - 4);
            millisHandling = MillisHandling.APPEND;
        } else if (timeFormat.contains("SSS")) {
            millisHandling = MillisHandling.REPLACE_SSS;
            cachedTimeFormat = timeFormat;
        } else if (timeFormat.contains("SS")) {
            millisHandling = MillisHandling.REPLACE_SS;
            cachedTimeFormat = timeFormat;