## Declare `Header` parameters { #declare-header-parameters }

Then declare the header parameters using the same structure as with `Path`, `Query` and `Cookie`.

You can define the default value as well as all the extra validation or annotation parameters:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[9] *}

/// note | Technical Details

        required: true
      debug_enabled:
        description: 'Run the build with tmate debugging enabled (https://github.com/marketplace/actions/debugging-with-tmate)'
        required: false
        default: 'false'

env:
  UV_SYSTEM_PYTHON: 1

jobs:
  job:
    runs-on: ubuntu-latest
    permissions:
      discussions: write
    steps:
      - name: Dump GitHub context
        env:

    /** Application type identifier for job context */
    protected static final String APP_TYPE = "JOB";

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

    @Resource
    private TimeManager timeManager;

    @Resource
    private FessConfig fessConfig;

    @Resource

    @Override
    public void setUp() throws Exception {
        super.setUp();
        aggregateLogJob = new AggregateLogJob();
    }

    public void test_constructor() {
        // Test default constructor
        AggregateLogJob job = new AggregateLogJob();
        assertNotNull(job);
    }

    public void test_execute_success() {
        // Setup mock SearchLogHelper that succeeds

    public void setUp() {
        serverData = new ServerData();
    }

    /**
     * Test default constructor initializes all fields with default values
     */
    @Test
    @DisplayName("Test default constructor initializes fields with default values")
    public void testDefaultConstructor() {
        // Then - verify all fields have default values
        assertEquals((byte) 0, serverData.sflags);
        assertEquals(0, serverData.sflags2);

   * to any {@code Runnable} passed to the default implementation of {@link #wrapTask(Runnable)}.
   */
  protected abstract <T extends @Nullable Object> Callable<T> wrapTask(Callable<T> callable);

  /**
   * Wraps a {@code Runnable} for submission to the underlying executor. The default implementation
   * delegates to {@link #wrapTask(Callable)}.
   */

     *             installation has failed
     * @throws IllegalArgumentException if a parameter {@code session} is {@code null} or
     *          {@code artifact} is {@code null}
     */
    default void install(Session session, ProducedArtifact artifact) {
        install(session, Collections.singletonList(artifact));
    }

    /**
     * @param session the repository session

In 1.23, the `PodSecurity` feature gate is enabled by default.

### Container Runtime Interface (CRI) v1 is default

The Kubelet now supports the CRI `v1` API, which is now the project-wide default.
If a container runtime does not support the `v1` API, Kubernetes will fall back to the `v1alpha2` implementation.

Comme nous devons remplacer la valeur par défaut `None` dans la fonction par `Query()`, nous pouvons maintenant définir la valeur par défaut avec le paramètre `Query(default=None)`, il sert le même objectif qui est de définir cette valeur par défaut.

Donc :

```Python
q: Union[str, None] = Query(default=None)
```

... rend le paramètre optionnel, et est donc équivalent à :

```Python
q: Union[str, None] = None
```

import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpSession;

/**
 * The action for search operations.
 */
public class SearchAction extends FessSearchAction {

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

    // ===================================================================================