/**
     * Attempts to acquire a distributed lock for the specified operation with optional data.
     *
     * @param operationName the operation name used as the lock document ID.
     * @param data optional data to store with the operation document.
     * @return {@code true} if the lock was acquired.
     */
    public boolean tryStartOperation(final String operationName, final String data) {

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;

/**
 * Unit tests for {@link UserService}.
 * Tests user service business logic including store, delete, and password operations.
 */
public class UserServiceTest extends UnitFessTestCase {

    private UserService userService;

    @Override
    protected void setUp(TestInfo testInfo) throws Exception {

     */
    protected static class InputStreamThread extends Thread {

        /** Buffered reader for input stream. */
        private BufferedReader br;

        /** List to store captured output lines. */
        private final List<String> list = new LinkedList<>();

        /** Maximum number of lines to buffer. */
        private final int maxLineBuffer;

        /**

                // ignore
            }
            CloseableUtil.closeQuietly(writer);

            if (isCommit) {
                try {
                    dictionaryManager.store(KuromojiFile.this, newFile);
                } finally {
                    newFile.delete();
                }
            } else {
                newFile.delete();
            }
        }
    }

                return future.get();
            } catch (final InterruptedException e) {
                logger.warn("Search operation was interrupted", e);
                Thread.currentThread().interrupt(); // Restore interrupt status
                return SearchResult.create().build();
            } catch (final ExecutionException e) {
                if (e.getCause() instanceof final InvalidQueryException iqe) {

* `org.gradle.configuration-cache` – public property of a stable feature
* `org.gradle.configuration-cache.parallel` – public property of an unstable feature
* `org.gradle.configuration-cache.internal.parallel-store` – internal property
* `org.gradle.unsafe.isolated-projects` — public property of an unstable feature
* `org.gradle.experimental.declarative-common` – public property of an unstable feature

## Decision

            });
            saveInfo(messages -> messages.addSuccessSendTestmail(GLOBAL));
            updateProperty(Constants.NOTIFICATION_TO_PROPERTY, form.notificationTo);
            systemProperties.store();
        } catch (final Exception e) {
            logger.warn("Failed to send a test mail.", e);
            saveError(messages -> messages.addErrorsFailedToSendTestmail(GLOBAL));
        }

                    };
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }

            @Override
            public void store(org.codelibs.fess.dict.DictionaryFile<?> file, File tempFile) {
                // Copy tempFile to the actual file
                try {

                // ignore
            }
            CloseableUtil.closeQuietly(writer);

            if (isCommit) {
                try {
                    dictionaryManager.store(SynonymFile.this, newFile);
                } finally {
                    newFile.delete();
                }
            } else {
                newFile.delete();
            }
        }
    }

    public void test_constructorWithThrowableCause_AssertionError() {
        // Test with AssertionError
        String url = "http://example.com/invalid-state";
        String message = "Assertion failed during data store access";
        AssertionError error = new AssertionError("Data integrity check failed");

        DataStoreCrawlingException exception = new DataStoreCrawlingException(url, message, error, false);