log4j-jakarta-web/src/main/java/org/apache/logging/log4j/web/Log4jShutdownOnContextDestroyedListener.java [30:76]:
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public class Log4jShutdownOnContextDestroyedListener implements ServletContextListener {

    private static final int DEFAULT_STOP_TIMEOUT = 30;
    private static final TimeUnit DEFAULT_STOP_TIMEOUT_TIMEUNIT = TimeUnit.SECONDS;

    private static final String KEY_STOP_TIMEOUT = "log4j.stop.timeout";
    private static final String KEY_STOP_TIMEOUT_TIMEUNIT = "log4j.stop.timeout.timeunit";

    private static final Logger LOGGER = StatusLogger.getLogger();

    private ServletContext servletContext;
    private Log4jWebLifeCycle initializer;

    @Override
    public void contextInitialized(final ServletContextEvent event) {
        LOGGER.debug(Log4jShutdownOnContextDestroyedListener.class.getSimpleName()
                + " ensuring that Log4j started up properly.");
        servletContext = event.getServletContext();
        if (null == servletContext.getAttribute(Log4jWebSupport.SUPPORT_ATTRIBUTE)) {
            throw new IllegalStateException("Context did not contain required Log4jWebLifeCycle in the "
                    + Log4jWebSupport.SUPPORT_ATTRIBUTE + " attribute.");
        }
        this.initializer = WebLoggerContextUtils.getWebLifeCycle(servletContext);
    }

    @Override
    public void contextDestroyed(final ServletContextEvent event) {
        if (this.servletContext == null || this.initializer == null) {
            LOGGER.warn("Context destroyed before it was initialized.");
            return;
        }
        LOGGER.debug(Log4jShutdownOnContextDestroyedListener.class.getSimpleName()
                + " ensuring that Log4j shuts down properly.");

        this.initializer.clearLoggerContext(); // the application is finished
        // shutting down now
        if (initializer instanceof LifeCycle2) {
            final String stopTimeoutStr = servletContext.getInitParameter(KEY_STOP_TIMEOUT);
            final long stopTimeout =
                    Strings.isEmpty(stopTimeoutStr) ? DEFAULT_STOP_TIMEOUT : Long.parseLong(stopTimeoutStr);
            final String timeoutTimeUnitStr = servletContext.getInitParameter(KEY_STOP_TIMEOUT_TIMEUNIT);
            final TimeUnit timeoutTimeUnit = Strings.isEmpty(timeoutTimeUnitStr)
                    ? DEFAULT_STOP_TIMEOUT_TIMEUNIT
                    : TimeUnit.valueOf(toRootUpperCase(timeoutTimeUnitStr));
            ((LifeCycle2) this.initializer).stop(stopTimeout, timeoutTimeUnit);
        } else {
            this.initializer.stop();
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log4j-web/src/main/java/org/apache/logging/log4j/web/Log4jShutdownOnContextDestroyedListener.java [30:76]:
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public class Log4jShutdownOnContextDestroyedListener implements ServletContextListener {

    private static final int DEFAULT_STOP_TIMEOUT = 30;
    private static final TimeUnit DEFAULT_STOP_TIMEOUT_TIMEUNIT = TimeUnit.SECONDS;

    private static final String KEY_STOP_TIMEOUT = "log4j.stop.timeout";
    private static final String KEY_STOP_TIMEOUT_TIMEUNIT = "log4j.stop.timeout.timeunit";

    private static final Logger LOGGER = StatusLogger.getLogger();

    private ServletContext servletContext;
    private Log4jWebLifeCycle initializer;

    @Override
    public void contextInitialized(final ServletContextEvent event) {
        LOGGER.debug(Log4jShutdownOnContextDestroyedListener.class.getSimpleName()
                + " ensuring that Log4j started up properly.");
        servletContext = event.getServletContext();
        if (null == servletContext.getAttribute(Log4jWebSupport.SUPPORT_ATTRIBUTE)) {
            throw new IllegalStateException("Context did not contain required Log4jWebLifeCycle in the "
                    + Log4jWebSupport.SUPPORT_ATTRIBUTE + " attribute.");
        }
        this.initializer = WebLoggerContextUtils.getWebLifeCycle(servletContext);
    }

    @Override
    public void contextDestroyed(final ServletContextEvent event) {
        if (this.servletContext == null || this.initializer == null) {
            LOGGER.warn("Context destroyed before it was initialized.");
            return;
        }
        LOGGER.debug(Log4jShutdownOnContextDestroyedListener.class.getSimpleName()
                + " ensuring that Log4j shuts down properly.");

        this.initializer.clearLoggerContext(); // the application is finished
        // shutting down now
        if (initializer instanceof LifeCycle2) {
            final String stopTimeoutStr = servletContext.getInitParameter(KEY_STOP_TIMEOUT);
            final long stopTimeout =
                    Strings.isEmpty(stopTimeoutStr) ? DEFAULT_STOP_TIMEOUT : Long.parseLong(stopTimeoutStr);
            final String timeoutTimeUnitStr = servletContext.getInitParameter(KEY_STOP_TIMEOUT_TIMEUNIT);
            final TimeUnit timeoutTimeUnit = Strings.isEmpty(timeoutTimeUnitStr)
                    ? DEFAULT_STOP_TIMEOUT_TIMEUNIT
                    : TimeUnit.valueOf(toRootUpperCase(timeoutTimeUnitStr));
            ((LifeCycle2) this.initializer).stop(stopTimeout, timeoutTimeUnit);
        } else {
            this.initializer.stop();
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