**Note:** We use `int | None` for the primary key field so that in Python code we can *create an object without an `id`* (`id=None`), assuming the database will *generate it when saving*. SQLModel understands that the database will provide the `id` and *defines the column as a non-null `INTEGER`* in the database schema. See <a href="https://sqlmodel.tiangolo.com/tutorial/create-db-and-table/#primary-key-id" class="external-link" target="_blank">SQLModel docs on primary keys</a> for details.

* `Field(index=True)`...

 *
 * @since 3.0
 */
@Named
@Singleton
public class DefaultPluginVersionResolver implements PluginVersionResolver {
    private static final String REPOSITORY_CONTEXT = org.apache.maven.api.services.RequestTrace.CONTEXT_PLUGIN;

    private static final Object CACHE_KEY = new Object();

    private final Logger logger = LoggerFactory.getLogger(getClass());
    private final RepositorySystem repositorySystem;

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api.services;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;

### Injection de dépendances

FastAPI contient un système simple mais extrêmement puissant d'<abbr title='aussi connus sous le nom de "composants", "ressources", "services", "providers"'><strong>Injection de Dépendances</strong></abbr>.

* Même les dépendances peuvent avoir des dépendances, créant une hiérarchie ou un **"graph" de dépendances**
* Tout est **automatiquement géré** par le framework

# Settings and Environment Variables { #settings-and-environment-variables }

In many cases your application could need some external settings or configurations, for example secret keys, database credentials, credentials for email services, etc.

Most of these settings are variable (can change), like database URLs. And many could be sensitive, like secrets.

For this reason it's common to provide them in environment variables that are read by the application.

/// tip

### Server-Side Encryption with a KMS

SSE-S3 allows an S3 client to en/decrypt an object at the MinIO server using a KMS. The MinIO
server only assumes that the KMS provides two services:

- `GenerateKey`: Takes a key ID and generates a new data key from a master key referenced by the key ID. It returns the new data key in two different forms: The plain data key and the data key encrypted using the master key.

    val errorProneAnnotations = "com.google.errorprone:error_prone_annotations"
    val fastutil = "it.unimi.dsi:fastutil"
    val gcs = "com.google.apis:google-api-services-storage"
    val googleApiClient = "com.google.api-client:google-api-client"
    val googleHttpClient = "com.google.http-client:google-http-client"

                if (result < 0 || (result == 0 && (!lowerBoundInclusive || !upperBoundInclusive))) {
                    throw new InvalidVersionSpecificationException("Range defies version ordering: " + spec);
                }
            }

            restriction = new Restriction(lowerVersion, lowerBoundInclusive, upperVersion, upperBoundInclusive);
        }

	globalPolicySys = NewPolicySys()
	objLayer, err := newErasureServerPools(ctx, endpoints)
	if err != nil {
		return nil, nil, err
	}

	// Make objLayer available to all internal services via globalObjectAPI.
	globalObjLayerMutex.Lock()
	globalObjectAPI = objLayer
	globalObjLayerMutex.Unlock()
	return objLayer, erasureDirs, nil
}

			endpoints = append(endpoints, strings.Join(lbls, ""))
		}
	}
	s.endpoints = endpoints
	return endpoints
}

// Get returns the sets representation of the endpoints
// this function also intelligently decides on what will
// be the right set size etc.
func (s endpointSet) Get() (sets [][]string) {
	k := uint64(0)
	endpoints := s.getEndpoints()
	for i := range s.setIndexes {
		for j := range s.setIndexes[i] {