}
    }

    @Nested
    @DisplayName("Execution")
    class ExecutionTests {

        @Test
        @DisplayName("should log appropriate header message")
        void shouldLogAppropriateHeaderMessage() throws Exception {
            UpgradeContext context = createMockContext();

            // Create a temporary directory with a POM file for the test

            fail("Interrupted during execution");
        } catch (final ExecutionException e) {
            fail("Execution failed: " + e.getMessage());
        } finally {
            executor.shutdown();
            try {
                if (!executor.awaitTermination(30, java.util.concurrent.TimeUnit.SECONDS)) {
                    executor.shutdownNow();
                }

import org.apache.maven.exception.DefaultExceptionHandler;
import org.apache.maven.exception.ExceptionHandler;
import org.apache.maven.exception.ExceptionSummary;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.ExecutionListener;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionRequestPopulationException;

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

import java.util.Collection;

import org.apache.maven.execution.MojoExecutionEvent;
import org.apache.maven.execution.MojoExecutionListener;

class CompoundMojoExecutionListener implements MojoExecutionListener {

    private final Collection<MojoExecutionListener> listeners;

    // Execution Type Constants
    // ============================================================

    /** Execution type for crawler operations. */
    public static final String EXECUTE_TYPE_CRAWLER = "crawler";

    /** Execution type for thumbnail operations. */
    public static final String EXECUTE_TYPE_THUMBNAIL = "thumbnail";

    /** Execution type for Python script operations. */

import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
import org.apache.maven.artifact.resolver.ResolutionErrorHandler;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.DefaultMavenExecutionResult;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.impl.DefaultArtifact;
import org.apache.maven.impl.DefaultArtifactCoordinatesFactory;

  /* use AbstractService for state management */
  private final Service delegate =
      new AbstractService() {
        @Override
        protected final void doStart() {
          Executor executor = renamingDecorator(executor(), () -> serviceName());
          executor.execute(
              () -> {
                try {
                  startUp();
                  notifyStarted();

import org.apache.maven.configuration.internal.EnhancedComponentConfigurator;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.DefaultMavenExecutionResult;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.impl.model.reflection.IntrospectionException;
import org.apache.maven.internal.impl.DefaultLookup;

public class MavenExecutionPlan implements Iterable<ExecutionPlanItem> {

    /*
      At the moment, this class is totally immutable, and this is in line with thoughts about the
      pre-calculated execution plan that stays the same during the execution.

      If deciding to add mutable state to this class, it should be at least considered to
      separate this into a separate mutable structure.

    */

///

## Multiple middleware execution order { #multiple-middleware-execution-order }