When you declare a *path operation* in your application, **FastAPI** automatically generates the relevant metadata about that *path operation* to be included in the OpenAPI schema.

/// note | Technical details

In the OpenAPI specification it is called the [Operation Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#operation-object).

///

이 예제에서는 응답이 전송된 *후에* 메시지가 `log.txt` 파일에 작성됩니다.

요청에 쿼리가 있었다면, 백그라운드 작업으로 로그에 작성됩니다.

그 다음 *경로 처리 함수*에서 생성된 또 다른 백그라운드 작업이 `email` 경로 매개변수를 사용해 메시지를 작성합니다.

## 기술적 세부사항 { #technical-details }

`BackgroundTasks` 클래스는 [`starlette.background`](https://www.starlette.dev/background/)에서 직접 가져옵니다.

// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"encoding/json"
	"maps"

// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"fmt"
	"sync"
	"sync/atomic"

when it starts in an interactive mode:

    Gnomovision version 69, Copyright (C) year name of author
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type
    `show w'. This is free software, and you are welcome to redistribute
    it under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the
appropriate parts of the General Public License. Of course, the commands

    // GET /api/admin/pathmap/setting/{id}
    /**
     * Returns specific path mapping setting by ID.
     *
     * @param id the path mapping setting ID
     * @return JSON response containing the path mapping setting details
     */
    @Execute
    public JsonResponse<ApiResult> get$setting(final String id) {
        return asJson(

    /**
     * Returns specific related content setting by ID.
     *
     * @param id the related content setting ID
     * @return JSON response containing the related content setting details
     */
    @Execute
    public JsonResponse<ApiResult> get$setting(final String id) {
        return asJson(

                                                           items="${failureUrlItems}">
                                                    <tr data-href="${contextPath}/admin/failureurl/details/4/${f:u(data.id)}" role="button" tabindex="0">
                                                        <td>${f:h(data.url)}</td>
                                                        <td>${f:h(data.errorName)}</td>

 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */