* evicted or manually invalidated. The common way to build instances is using {@link CacheBuilder}.
 *
 * <p>Implementations of this interface are expected to be thread-safe, and can be safely accessed
 * by multiple concurrent threads.
 *
 * @param <K> the type of the cache's keys, which are not permitted to be null
 * @param <V> the type of the cache's values, which are not permitted to be null
 * @author Charles Fry

    }

    protected void loadProtocols(final String basePackage) {
        final List<String> subPackages = new ArrayList<>();
        final String path = basePackage.replace('.', '/');
        final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        try {
            final Enumeration<URL> resources = classLoader.getResources(path);

            while (resources.hasMoreElements()) {

            SingletonLaContainerFactory.setExternalContextComponentDefRegister(new GenericExternalContextComponentDefRegister());
            SingletonLaContainerFactory.init();

            final Thread shutdownCallback = new Thread("ShutdownHook") {
                @Override
                public void run() {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Destroying LaContainer..");

labels.includedUrls=Included URLs For Crawling
labels.includedDocPaths=Included Paths For Indexing
labels.includedDocUrls=Included URLs For Indexing
labels.maxAccessCount=Max Access Count
labels.name=Name
labels.numOfThread=Num of Thread
labels.duplicateHostName=Duplicate Name
labels.pageNumber=Page Number
labels.password=Password
labels.paths=Paths
labels.port=Port
labels.regex=Regular Expression
labels.regularName=Regular Name

                test(listener, session, resource, bytes);
            });
        }

        // start all threads at once
        try {
            startLatch.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        // wait for all thread to end
        try {
            endLatch.await();
        } catch (InterruptedException e) {
            e.printStackTrace();

     *  The implementation of this is a little slow, since it creates
     *  a number of objects each time it is called.  This could be optimized
     *  to keep the same objects around, but then thread-safety issues would arise.
     *
     *  @param contextNode The node to start searching from.
     *  @param expression A valid XPath string.

                    .setCreate(true)
                    .setSource(source)
                    .execute()
                    .actionGet();
                count++;
                Thread.sleep(500);
            } catch(Exception e) {
                Logger.warn(e.getMessage(), e);
            }
        }
    }

        final String value = params.get(key);
        if (value == null) {
            return key;
        }
        return value;
    }

    protected static class MonitorThread extends Thread {
        private final Process process;

        private final long timeout;

        private boolean finished = false;

        private boolean teminated = false;

 * contract.
 *
 * <p>The {@code standard} methods and the collection views they return are not guaranteed to be
 * thread-safe, even when all of the methods that they depend on are thread-safe.
 *
 * @author Louis Wasserman
 * @since 12.0
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingNavigableSet<E extends @Nullable Object>

    private static final String KEEP_EXPIRES_DOCS = "keep_expires_docs";

    protected long crawlingExecutionInterval = Constants.DEFAULT_CRAWLING_EXECUTION_INTERVAL;

    protected int crawlerPriority = Thread.NORM_PRIORITY;

    protected final List<DataCrawlingThread> dataCrawlingThreadList = Collections.synchronizedList(new ArrayList<>());

    public void crawl(final String sessionId) {