}
        });
        assertEquals("open fail", ex.getMessage());
        verify(tree, times(1)).release(); // closed on constructor failure
    }

    @Test
    @DisplayName("Iteration skips '.' and '..' and returns valid entries")
    void iterationSkipsDotAndDotDot() throws Exception {
        // Arrange
        stubAcquireReturnsSelf();
        FileEntry initial = entry("a");

        double avgOpTimeNs = totalTime.get() / (double) operations.get();

        System.out.printf("Encryption Byte Tracking Performance: %d ops in %.2f ms%n", operations.get(), overallTimeMs);
        System.out.printf("  Avg atomic operation time: %.2f ns%n", avgOpTimeNs);

        // Verify lock-free performance (allowing for JVM overhead)
        assertTrue(avgOpTimeNs < 5000, "Atomic operations should be reasonably fast (no lock contention)");

- **Deferred/Promise**: Async operations

### Index Alias Strategy

Zero-downtime index updates using dual aliases:

```
Index Naming: {baseIndex}.{timestamp}
Example:      my-suggest.20250123120000

Aliases:
├── Search Alias: {baseIndex}          (read operations)
└── Update Alias: {baseIndex}.update   (write operations)
```

### Text Processing Pipeline

```
Input Text

 * text during indexing and search operations.
 *
 * <p>Each mapping item consists of one or more input character sequences that are mapped to a single output
 * character sequence. The mapping supports both original values and new values for update operations.</p>
 */
public class CharMappingItem extends DictionaryItem {
    /**

{* ../../docs_src/bigger_applications/app_an_py39/routers/users.py hl[1,3] title["app/routers/users.py"] *}

### *Path operations* with `APIRouter` { #path-operations-with-apirouter }

And then you use it to declare your *path operations*.

Use it the same way you would use the `FastAPI` class:

    assertEquals(1, Iterators.size(registry.getSubscribers(1)));

    registry.register(new IntegerSubscriber());
    assertEquals(3, Iterators.size(registry.getSubscribers("")));
    assertEquals(1, Iterators.size(registry.getSubscribers(new Object())));
    assertEquals(2, Iterators.size(registry.getSubscribers(1)));
  }

  public void testGetSubscribers_returnsImmutableSnapshot() {

 *
 * Class<?> someClass = ...;
 * for (Class<?> clazz : iterable(someClass)) {
 *     ...
 * }
 * </pre>
 * <p>
 * By default, the {@link Object} class is also included in the iteration. If you do not want to include {@link Object},
 * specify {@literal false} for the second argument of {@link #iterable(Class, boolean)} or {@link #ClassIterator(Class, boolean)}.
 * </p>
 *
 * @author koichik
 */

            byte[] nonce = encryptionContext.generateNonce();
            String nonceHex = bytesToHex(nonce);
            boolean added = nonceSet.add(nonceHex);
            assertTrue(added, "Nonce collision detected at iteration " + i);
        }

        // Then
        assertEquals(count, nonceSet.size(), "All generated nonces should be unique");
    }

    @Test

	MTime                time.Time // Is only set in POST/PUT operations
	Expires              time.Time // Is only used in POST/PUT operations

	DeleteMarker            bool // Is only set in DELETE operations for delete marker replication
	CheckDMReplicationReady bool // Is delete marker ready to be replicated - set only during HEAD
	Tagging                 bool // Is only in GET/HEAD operations to return tagging metadata along with regular metadata and body.

    assertEquals(1, Iterators.size(registry.getSubscribers(1)));

    registry.register(new IntegerSubscriber());
    assertEquals(3, Iterators.size(registry.getSubscribers("")));
    assertEquals(1, Iterators.size(registry.getSubscribers(new Object())));
    assertEquals(2, Iterators.size(registry.getSubscribers(1)));
  }

  public void testGetSubscribers_returnsImmutableSnapshot() {