* It writes data to a temporary file once the data size exceeds a specified threshold.
 *
 * <p>This class ensures that the temporary file is deleted if it is not needed.
 * It uses a logger to log warnings if there are issues deleting the temporary file.</p>
 *
 * <p>Fields:</p>
 * <ul>
 *   <li>{@code logger} - Logger instance for logging warnings.</li>
 *   <li>{@code PREFIX} - Prefix for the temporary file name.</li>

        try (Stream<Path> walk = Files.walk(dir, FileVisitOption.FOLLOW_LINKS)) {
            walk.sorted(Comparator.reverseOrder()).forEach(f -> {
                if (logger.isDebugEnabled()) {
                    logger.debug("Deleting: path={}", f);
                }
                try {
                    Files.delete(f);
                } catch (final IOException e) {
                    logger.warn("Failed to delete: path={}", f, e);

 - ... Standard Events...
 - ResponseBodyEnd _(0 bytes)_
 - **CacheHit**
 - ConnectionReleased
 - CallEnd
 
## Cache directory

The cache directory must be exclusively owned by a single instance.

Deleting the cache when it is no longer needed can be done.  However this may delete the purpose of the cache
which is designed to persist between app restarts.

```kotlin
cache.delete()
```
 
## Pruning the Cache

import jakarta.annotation.Resource;

/**
 * Implementation of the {@link UrlFilterService} interface.
 * This class provides methods for managing URL filtering rules,
 * including adding include and exclude URL patterns, deleting patterns,
 * and retrieving lists of compiled URL patterns. It utilizes a
 * {@link MemoryDataHelper} to store and manage the URL patterns in memory.
 *
 */
public class UrlFilterServiceImpl implements UrlFilterService {

import jakarta.annotation.Resource;

/**
 * Service for managing stopwords.
 * This class provides methods to interact with stopwords dictionaries,
 * including retrieving, storing, and deleting stopwords.
 */
public class StopwordsService {
    /** The dictionary manager for accessing dictionary files. */
    @Resource
    protected DictionaryManager dictionaryManager;

import jakarta.annotation.Resource;

/**
 * Service for managing synonyms.
 * This class provides methods to interact with synonym dictionaries,
 * including retrieving, storing, and deleting synonyms.
 */
public class SynonymService {
    /** The dictionary manager for accessing dictionary files. */
    @Resource
    protected DictionaryManager dictionaryManager;

import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing file authentication configurations.
 * This service provides operations for retrieving, storing, and deleting
 * file authentication settings used by the Fess search engine.
 */
public class FileAuthenticationService {

    /**
     * Default constructor for file authentication service.

import jakarta.annotation.Resource;

/**
 * Service class for managing web crawling configurations.
 * Provides CRUD operations for web configuration settings including
 * listing, retrieving, storing, and deleting web crawling configurations.
 */
public class WebConfigService extends FessAppService {

    /**
     * Default constructor.
     */
    public WebConfigService() {
        super();
    }

    /**

import org.lastaflute.web.response.JsonResponse;
import org.lastaflute.web.response.StreamResponse;

/**
 * Handles API requests for storage management in the Fess application.
 * Provides endpoints for listing, downloading, deleting, and uploading files.
 */
public class ApiAdminStorageAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminStorageAction.class);

import org.lastaflute.web.ruts.process.ActionRuntime;
import org.lastaflute.web.validation.exception.ValidationErrorException;

/**
 * Admin action for Plugin management.
 * This class provides functionality for installing, deleting, and managing plugins in the Fess system.
 *
 */
public class AdminPluginAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminPluginAction() {
        super();