/**
 * Interface used to locate the root directory for a given project.
 *
 * The root locator is usually looked up from the plexus container.
 * One notable exception is the computation of the early {@code session.rootDirectory}
 * property which happens very early.  The implementation used in this case
 * will be discovered using the JDK service mechanism.
 *
 * The default implementation will look for a {@code .mvn} child directory

    private static final Logger LOGGER = LoggerFactory.getLogger(DistributionManagementArtifactRelocationSource.class);

    @Override
    public Artifact relocatedTarget(
            RepositorySystemSession session, ArtifactDescriptorResult artifactDescriptorResult, Model model) {
        DistributionManagement distMgmt = model.getDistributionManagement();
        if (distMgmt != null) {

        }
        return key;
    }

    /**
     * Calculates the effective user session key.
     *
     * @param challenge The server challenge.
     * @param dest The destination array in which the user session key will be
     * placed.
     * @param offset The offset in the destination array at which the
     * session key will start.
     */

     * - Dependency resolution results
     * - Compilation outputs
     * - Downloaded artifacts
     */
    PERSISTENT,

    /**
     * Data should be retained for the duration of the current Maven session.
     * Suitable for:
     * - Build-wide configuration
     * - Project model caching
     * - Inter-module metadata
     */
    SESSION_SCOPED,

    /**

        SmbTreeImpl tree = mock(SmbTreeImpl.class);
        SmbSessionImpl session = mock(SmbSessionImpl.class);
        SmbTransportImpl transport = mock(SmbTransportImpl.class);

        when(tree.isConnected()).thenReturn(true);
        when(tree.getSession()).thenReturn(session);
        when(tree.acquire(false)).thenReturn(tree);
        when(session.getTransport()).thenReturn(transport);

`SQLModel.metadata.create_all(engine)` を使って、すべてのテーブルモデルのテーブルを作成する関数を追加します。

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[21:22] hl[21:22] *}

### Session 依存関係の作成 { #create-a-session-dependency }

`Session` は、メモリ上でオブジェクトを保持して変更を追跡し、`engine` を使ってデータベースと通信します。

各リクエストごとに新しい `Session` を提供する、`yield` を使った FastAPI の依存関係を作成します。これにより、1 リクエストにつき 1 つのセッションを使うことが保証されます。🤓

続いて、この依存関係を使うコードを簡潔にするために、`Annotated` による依存関係 `SessionDep` を作成します。

class MySuperContextManager:
    def __init__(self):
        self.db = DBSession()

    def __enter__(self):
        return self.db

    def __exit__(self, exc_type, exc_value, traceback):
        self.db.close()


async def get_db():
    with MySuperContextManager() as db:

                    "-DvalFound=s${foo}i",
                    "-DvalNotFound=s${foz}i",
                    "-DvalRootDirectory=${session.rootDirectory}/.mvn/foo",
                    "-DvalTopDirectory=${session.topDirectory}/pom.xml",
                    "-f",
                    "${session.rootDirectory}/my-child",
                    "prefix:3.0.0:${foo}",
                    "validate"
                },

 *
 * <p>Each result is linked to its originating {@link Request}, allowing for:
 * <ul>
 *   <li>Traceability between requests and their outcomes</li>
 *   <li>Access to the session context used during processing</li>
 *   <li>Correlation of results with their initiating parameters</li>
 * </ul>
 *
 * @param <REQ> the type of Request that produced this result, ensuring type-safe

        this.macAddress = macAddress;
        isDataFromNodeStatus = true;
    }

    /* Guess next called name to try for session establishment. These
     * methods are used by the smb package.
     */

    /**
     * Gets the first called name for session establishment.
     *
     * @return the first called name to try
     */
    public String firstCalledName() {