### Dependency Injection { #dependency-injection }

FastAPI enthält ein extrem einfach zu verwendendes, aber extrem mächtiges <dfn title='auch bekannt als: "Komponenten", "Ressourcen", "Dienste", "Dienstanbieter"'><strong>Dependency Injection</strong></dfn> System.

                            } catch (Throwable e) {
                                failures.add(new IllegalStateException(
                                        "Injection failure in "
                                                + extension.coreExtension().getId(),
                                        e));
                            }
                        }

 * assist those clients that employ the repository system outside of an IoC container, Maven plugins should instead
 * always use regular dependency injection to acquire the repository system.
 *
 * @deprecated See {@link MavenSessionBuilderSupplier}
 */
@Deprecated
public final class MavenRepositorySystemUtils {

    private MavenRepositorySystemUtils() {

Es erreicht etwas Ähnliches wie Flask-apispec.

Es verfügt über ein integriertes Dependency Injection System, welches von Angular 2 inspiriert ist. Erfordert ein Vorab-Registrieren der „Injectables“ (wie alle anderen Dependency Injection Systeme, welche ich kenne), sodass der Code ausschweifender wird und es mehr Codeverdoppelung gibt.

    }

    /**
     * Registers this creator with the dictionary manager upon initialization.
     * This method is annotated with {@link PostConstruct} to be executed after
     * dependency injection is complete.
     */
    @PostConstruct
    public void register() {
        if (logger.isInfoEnabled()) {
            logger.info("Loaded {}", this.getClass().getSimpleName());
        }

# /---------------------------------------------------------------------------
# dependencyInjectionMap: (NotRequired - Default map:{})
#
# The various settings about dependency injection(DI Container). 
#
# {Java} Spring Only:
# o dbfluteBeansPackageName (NotRequired - Default '../resources')
# o dbfluteBeansFileName: (NotRequired - Default 'dbfluteBeans.xml')
# o dbfluteBeansDataSourceName: (NotRequired - Default 'dataSource')

        super();
    }

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(FessFileTransformer.class);

    /**
     * Initializes the transformer after dependency injection.
     * Sets up the Fess configuration and data serializer components.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

/**
 * Exception thrown when a dependency injection container or component is not available.
 * This exception indicates that the required container or a specific component within it cannot be accessed.
 */
public class ContainerNotAvailableException extends FessSystemException {

### Dependency Injection { #dependency-injection }

FastAPI includes an extremely easy to use, but extremely powerful <dfn title='also known as "components", "resources", "services", "providers"'><strong>Dependency Injection</strong></dfn> system.

* Even dependencies can have dependencies, creating a hierarchy or **"graph" of dependencies**.

import java.util.Map;

/**
 * A core extension to monitor Maven's execution. Typically, such an extension gets loaded into Maven by specifying the
 * property {@code maven.ext.class.path} on the command line. As soon as dependency injection is set up, Maven
 * looks up all implementers of this interface and calls their {@link #init(Context)} method. Note: