}


    def "can add config and fire"() {
        given:
        def events = []

        when:
        config.add { events << "a" }
        config.add { events << "b" }

        and:
        config.fire()

        then:
        events == ["a", "b"]
    }

    def "fire is idempotent"() {
        given:
        def events = []

        when:

    TimeoutFuture<V> result = new TimeoutFuture<>(delegate);
    Fire<V> fire = new Fire<>(result);
    result.timer = scheduledExecutor.schedule(fire, time, unit);
    delegate.addListener(fire, directExecutor());
    return result;
  }

  /*
   * Memory visibility of these fields. There are two cases to consider.
   *
   * 1. visibility of the writes to these fields to Fire.run:
   *

    TimeoutFuture<V> result = new TimeoutFuture<>(delegate);
    Fire<V> fire = new Fire<>(result);
    result.timer = scheduledExecutor.schedule(fire, time, unit);
    delegate.addListener(fire, directExecutor());
    return result;
  }

  /*
   * Memory visibility of these fields. There are two cases to consider.
   *
   * 1. visibility of the writes to these fields to Fire.run:
   *

        registry.onTaskCompletion(provider)

        then:
        registry.subscriptions.size() == 1
        0 * listener._

        when:
        async {
            factory.fire(success)
            factory.fire(failure)
            factory.fire(skipped)
            signalBuildFinished()
        }

        then:
        1 * listener.onFinish({ it instanceof TaskFinishEvent && it.result instanceof TaskSuccessResult })

                        eventCatapult.fire(ExecutionEvent.Type.ForkedProjectStarted, session, mojoExecution);

                        execute(session, mojoExecutions);

                        eventCatapult.fire(ExecutionEvent.Type.ForkedProjectSucceeded, session, mojoExecution);
                    } catch (LifecycleExecutionException e) {

        long buildStartTime = System.currentTimeMillis();

        try {

            if (reactorContext.getReactorBuildStatus().isHaltedOrBlacklisted(currentProject)) {
                eventCatapult.fire(ExecutionEvent.Type.ProjectSkipped, session, null);
                return;
            }

            consumerPomArtifactTransformer.injectTransformedArtifacts(session.getRepositorySession(), currentProject);

    /**
     * Notifies the specified listener of the given event.
     *
     * @param listener The listener to notify, must not be {@code null}.
     * @param event The event to fire, must not be {@code null}.
     */
    void fire(ModelBuildingListener listener, ModelBuildingEvent event);

    ModelBuildingEventCatapult BUILD_EXTENSIONS_ASSEMBLED = ModelBuildingListener::buildExtensionsAssembled;

@Named
@Singleton
public class DefaultExecutionEventCatapult implements ExecutionEventCatapult {

    @Override
    public void fire(ExecutionEvent.Type eventType, MavenSession session, MojoExecution mojoExecution) {
        fire(eventType, session, mojoExecution, null);
    }

    @Override
    public void fire(
            ExecutionEvent.Type eventType, MavenSession session, MojoExecution mojoExecution, Exception exception) {

apiVersion: release-notes/v2
kind: feature
area: traffic-management
issue:
  - 46267

releaseNotes:
- |

import org.apache.maven.plugin.MojoExecution;

/**
 */
public class ExecutionEventCatapultStub implements ExecutionEventCatapult {

    public void fire(Type eventType, MavenSession session, MojoExecution mojoExecution) {}

    public void fire(Type eventType, MavenSession session, MojoExecution mojoExecution, Exception exception) {}