* <ol>
 *   <li>Initialization: Sets up the crawler context and initializes the URL filter.</li>
 *   <li>Thread Creation: Creates a group of crawler threads to perform the actual crawling.</li>
 *   <li>Execution: Starts the crawler threads and waits for them to complete.</li>
 *   <li>Cleanup: Deletes the crawled data and clears the URL filter.</li>
 * </ol>
 *

    // to suppress unexpected override by sub-class
    // you should remove the 'final' if you need to override this
    /**
     * Hook method called before action execution.
     * This method refreshes the user information if a user is logged in
     * and delegates to the view helper's action hook.
     *
     * @param runtime the action runtime context

                EventWriter eventWriter = eventWriters.get(descriptor);

                if (eventWriter != null) {
                    // It's not explicit what the threading guarantees are for TestListener method execution so we'll
                    // be explicitly safe here to avoid interleaving output from multiple test suites
                    synchronized (this) {

        String reference = "";
        if (!dejaVu.add(exception)) {
            return reference;
        }

        if (exception != null) {
            if (exception instanceof MojoExecutionException) {
                reference = MojoExecutionException.class.getSimpleName();

                Throwable cause = exception.getCause();

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api;

import org.apache.maven.api.annotations.Experimental;

/**
 * The possible types of execution events.
 *
 * @since 4.0.0
 */
@Experimental
public enum EventType {
    PROJECT_DISCOVERY_STARTED,
    SESSION_STARTED,
    SESSION_ENDED,
    PROJECT_SKIPPED,
    PROJECT_STARTED,

import org.apache.maven.api.model.PluginExecution;
import org.apache.maven.api.plugin.descriptor.MojoDescriptor;
import org.apache.maven.api.xml.XmlNode;

/**
 * A {@code MojoExecution} represents a single execution of a Maven Plugin during a given build.
 * An instance of this object is bound to the {@link org.apache.maven.api.di.MojoExecutionScoped}

          </models>
        </configuration>
        <executions>
          <execution>
            <id>modello</id>
            <goals>
              <goal>java</goal>
              <goal>xpp3-reader</goal>
              <goal>xpp3-writer</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

   * @return the result returned by the Callable
   * @throws TimeoutException if the time limit is reached
   * @throws InterruptedException if the current thread was interrupted during execution
   * @throws ExecutionException if {@code callable} throws a checked exception
   * @throws UncheckedExecutionException if {@code callable} throws a {@code RuntimeException}
   * @throws ExecutionError if {@code callable} throws an {@code Error}
   * @since 22.0

 * under the License.
 */
package org.apache.maven.eventspy.internal;

import org.apache.maven.execution.AbstractExecutionListener;
import org.apache.maven.execution.ExecutionEvent;
import org.apache.maven.execution.ExecutionListener;

/**
 * Forwards execution events to EventSpies.
 * @since 3.0.2
 */
class EventSpyExecutionListener extends AbstractExecutionListener {

package org.apache.maven.api.cli;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Defines the contract for parsing Maven command-line arguments and creating an execution or invoker requests.
 *
 * @since 4.0.0
 */
@Experimental
public interface Parser {
    /**
     * Parses the given ParserRequest to create an {@link InvokerRequest}.