In this case, the `startup` event handler function will initialize the items "database" (just a `dict`) with some values.

You can add more than one event handler function.

And your application won't start receiving requests until all the `startup` event handlers have completed.

### `shutdown` event

To add a function that should be run when the application is shutting down, declare it with the event `"shutdown"`:

                ArtifactHandler handler = manager.getArtifactHandler(id);
                type = new DefaultType(
                        id,
                        languageRegistry.lookup(handler.getLanguage()).orElseGet(() -> handler::getLanguage),
                        handler.getExtension(),
                        handler.getClassifier(),
                        handler.isIncludesDependencies(),

import org.codelibs.core.io.FileUtil;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.mortbay.jetty.Handler;
import org.mortbay.jetty.Server;
import org.mortbay.jetty.handler.DefaultHandler;
import org.mortbay.jetty.handler.HandlerList;
import org.mortbay.jetty.handler.ResourceHandler;
import org.mortbay.log.Log;

/**
 * @author shinsuke
 *
 */
public class CrawlerWebServer {

    }

    public static ArtifactType newArtifactType(String id, ArtifactHandler handler) {
        return new DefaultArtifactType(
                id,
                handler.getExtension(),
                handler.getClassifier(),
                handler.getLanguage(),
                handler.isAddedToClasspath(),
                handler.isIncludesDependencies());
    }

    public static Dependency toDependency(

    }

    @Override
    public void addHandlers(Map<String, ArtifactHandler> handlers) {
        throw new UnsupportedOperationException("Adding handlers programmatically is not supported anymore");
    }

    @Deprecated
    public Set<String> getHandlerTypes() {
        throw new UnsupportedOperationException("Querying handlers programmatically is not supported anymore");
    }

 */
package org.apache.maven.artifact.handler.manager;

import java.util.Map;

import org.apache.maven.artifact.handler.ArtifactHandler;

/**
 */
public interface ArtifactHandlerManager {
    String ROLE = ArtifactHandlerManager.class.getName();

    ArtifactHandler getArtifactHandler(String type);

    @Deprecated
    void addHandlers(Map<String, ArtifactHandler> handlers);

        Logger rootLogger = Logger.getLogger("");
        rootLogger.setLevel(Level.ALL);
        ConsoleHandler handler = new ConsoleHandler();
        handler.setFormatter(new SimpleFormatter());
        handler.setLevel(Level.ALL);
        rootLogger.addHandler(handler);
    }

    @Override
    public void tearDown() throws Exception {
        super.tearDown();
        // close runner

        ArtifactHandler handler = allHandlers.get(type);
        if (handler == null) {
            handler = artifactHandlers.get(type);
            if (handler == null) {
                handler = new DefaultArtifactHandler(type);
            } else {
                allHandlers.put(type, handler);
            }
        }
        return handler;
    }

 * under the License.
 */
package org.apache.maven.artifact;

import java.io.File;
import java.util.Collection;
import java.util.List;
import java.util.regex.Pattern;

import org.apache.maven.artifact.handler.ArtifactHandler;
import org.apache.maven.artifact.metadata.ArtifactMetadata;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.filter.ArtifactFilter;

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

/**
 * An artifact handler contains information explaining how an artifact plugs into the Maven build:<ul>
 * <li>Information needed to find the artifact file in a repository including extension and classifier</li>