Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.METADATA_INVALID);
        event.setTrace(trace);
        event.setMetadata(metadata);
        event.setException(exception);
        event.setRepository(repository);

        repositoryEventDispatcher.dispatch(event.build());
    }

![Events Diagram](../assets/images/******@****.***)

### Events with Retries and Follow-Ups

/**
 * Registry of subscribers to a single event bus.
 *
 * @author Colin Decker
 */
final class SubscriberRegistry {

  /**
   * All registered subscribers, indexed by event type.
   *
   * <p>The {@link CopyOnWriteArraySet} values make it easy and relatively lightweight to get an
   * immutable snapshot of all current subscribers to an event without any locking.
   */

     * {@link org.apache.maven.api.services.BuilderProblem.Severity#ERROR}.
     */
    default boolean hasErrorProblems() {
        return hasProblemsFor(BuilderProblem.Severity.ERROR);
    }

    /**
     * Returns {@code true} if there is at least one problem collected with severity equal or more severe than

     *
     * @param localRepository The local repository to use.
     * @return This request, never {@code null}.
     */
    RepositoryRequest setLocalRepository(ArtifactRepository localRepository);

    /**
     * Gets the remote repositories to use.
     *
     * @return The remote repositories to use, never {@code null}.
     */
    List<ArtifactRepository> getRemoteRepositories();

    /**

    }

    // Getters and Setters

    /**
     * Gets the event type.
     *
     * @return the event type
     */
    public WitnessEventType getEventType() {
        return eventType;
    }

    /**
     * Sets the event type.
     *
     * @param eventType the event type
     */
    public void setEventType(WitnessEventType eventType) {

        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.ARTIFACT_DESCRIPTOR_MISSING);
        event.setTrace(trace);
        event.setArtifact(artifact);
        event.setException(exception);

        repositoryEventDispatcher.dispatch(event.build());
    }

    private void invalidDescriptor(

            "lineInterpolation": "linear",
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "never",
            "spanNulls": false,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }

   *   <li>{@linkplain LoadingCache#getAll bulk loading requests}, including {@linkplain
   *       CacheLoader#loadAll bulk loading implementations}
   * </ul>
   *
   * <p><b>Warning:</b> For any given key, every {@code loader} used with it should compute the same
   * value. Otherwise, a call that passes one {@code loader} may return the result of another call

        val monitoredTaskPaths: SetProperty<String>
    }

    override fun onFinish(event: FinishEvent) {
        if (event !is TaskFinishEvent) {
            return
        }

        val taskPath = event.descriptor.taskPath
        if (shouldInclude(taskPath)) {
            action(taskPath, event.result)
        }
    }