// Clear session reference if mutable
                // Note: session field may be final, cannot be nulled
            }
        } catch (Exception e) {
            log.error("Failed to perform emergency tree cleanup", e);
        }
    }

    /**
     *
     * @return whether the tree is connected
     */
    public boolean isConnected() {

      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      copyright license to reproduce, prepare Derivative Works of,
      publicly display, publicly perform, sublicense, and distribute the
      Work and such Derivative Works in Source or Object form.

   3. Grant of Patent License. Subject to the terms and conditions of

import java.util.logging.Level;
import org.jspecify.annotations.Nullable;

/**
 * Base class for services that can implement {@link #startUp} and {@link #shutDown} but while in
 * the "running" state need to perform a periodic task. Subclasses can implement {@link #startUp},
 * {@link #shutDown} and also a {@link #runOneIteration} method that will be executed periodically.
 *

      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      copyright license to reproduce, prepare Derivative Works of,
      publicly display, publicly perform, sublicense, and distribute the
      Work and such Derivative Works in Source or Object form.

   3. Grant of Patent License. Subject to the terms and conditions of

      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      copyright license to reproduce, prepare Derivative Works of,
      publicly display, publicly perform, sublicense, and distribute the
      Work and such Derivative Works in Source or Object form.

   3. Grant of Patent License. Subject to the terms and conditions of

    MavenExecutionRequest addPluginArtifactRepository(ArtifactRepository repository);

    /**
     * Set a new list of remote repositories to use the execution request. This is necessary if you perform
     * transformations on the remote repositories being used. For example if you replace existing repositories with
     * mirrors then it's easier to just replace the whole list with a new list of transformed repositories.
     *

    public HtmlResponse index(final ListForm form) {
        saveToken();
        validate(form, messages -> {}, () -> asHtml(path_AdminError_AdminErrorJsp));
        return asListHtml();
    }

    /**
     * Performs a search operation with the provided form data.
     *
     * @param form the list form containing search criteria
     * @return HTML response with search results
     */

                logger.info("No crawling target urls.");
            }
            return;
        }

        doCrawl(sessionId, webConfigList, fileConfigList);
    }

    /**
     * Performs the actual crawling operation for the provided configurations.
     *
     * @param sessionId The session ID for this crawling operation
     * @param webConfigList List of web configurations to crawl

 * #offer} and a call to {@link #topK}, with O(k) memory. In comparison, quickselect has the same
 * asymptotics but requires O(n) memory, and a {@code PriorityQueue} implementation takes O(n log
 * k). In benchmarks, this implementation performs at least as well as either implementation, and
 * degrades more gracefully for worst-case input.
 *
 * <p>The implementation does not necessarily use a <i>stable</i> sorting algorithm; when multiple

    if (localFutures != null) {
      return "futures=" + localFutures;
    }
    return super.pendingToString();
  }

  /**
   * Must be called at the end of each subclass's constructor. This method performs the "real"
   * initialization; we can't put this in the constructor because, in the case where futures are
   * already complete, we would not initialize the subclass before calling {@link