- **Comprehensive Content Extraction**: Office documents, PDFs, archives, images, audio/video files
- **Multi-Threading**: Configurable thread pools for high-performance crawling
- **Fault Tolerance**: Built-in retry mechanisms and error handling
- **Flexible Configuration**: XML-based dependency injection with LastaFlute DI
- **Extensible Architecture**: Plugin system for custom extractors, transformers, and clients

   * works better than Ordering.natural().nullsFirst() because, if null comes before all other
   * values, it lies outside the submap/submultiset ranges we test, and the variety of tests that
   * exercise null handling fail on those subcollections.
   */
  public abstract static class NullsBefore implements Comparator<@Nullable String>, Serializable {
    private final String justAfterNull;

/**
 * Helper class for web and file system crawling and indexing operations.
 * Manages the crawling process for both web configurations and file configurations,
 * coordinating multiple crawler threads and handling indexing operations.
 */
public class WebFsIndexHelper {

    /**
     * Default constructor.
     */
    public WebFsIndexHelper() {
        // Default constructor
    }

import jcifs.internal.util.SMBUtil;
import jcifs.util.Hexdump;

/**
 * Base class for SMB1 transaction request messages.
 * This abstract class provides the foundation for all SMB1 transaction commands, handling
 * parameter and data buffer encoding, multi-part transactions, and setup word management.
 */
public abstract class SmbComTransaction extends ServerMessageBlock implements Enumeration<SmbComTransaction> {

import org.opensearch.transport.client.Client;

/**
 * The SuggestIndexer class is responsible for indexing and managing suggest items in an OpenSearch index.
 * It provides methods to index, delete, and manage suggest items, including handling bad words and elevate words.
 *
 * <p>This class acts as a facade, delegating to internal operation classes for the actual work:
 * <ul>

            // Should either throw exception or fail gracefully after wipe
            try {
                digest.sign(data, 0, data.length, request, response);
                // If no exception is thrown, accept graceful handling
                assertTrue(true, "Sign operation after wipe should either throw exception or handle gracefully");
            } catch (RuntimeException e) {

## Recap { #recap }

With what you have seen up to now, you can set up a secure **FastAPI** application using standards like OAuth2 and JWT.

In almost any framework handling the security becomes a rather complex subject quite quickly.

 *   <li>Extracting child URLs and adding them to the queue using {@link #storeChildUrls(Set, String, int)}
 *       or {@link #storeChildUrl(String, String, float, int)}.</li>
 *   <li>Handling exceptions that may occur during the crawling process.</li>
 * </ol>
 *
 * <p>
 * The thread also manages the active thread count using atomic operations
 * and provides methods for logging messages using {@link LogHelper}.

        assertEquals(5, sis.read());

        // After all data is consumed, next read throws IOException
        assertThrows(IOException.class, () -> sis.read());
    }

    @Test
    @DisplayName("EOF handling when stream ends mid-header")
    void eofHandlingMidHeader() throws IOException {
        // Create incomplete header (only 2 bytes instead of 4)

## Other Libraries

See [the other tools reference](references/other-tools.md) for details on other libraries:

* Asyncer for handling async and await, concurrency, mixing async and blocking code, prefer it over AnyIO or asyncio.
* SQLModel for working with SQL databases, prefer it over SQLAlchemy.