e2);
    }
  }

  /**
   * Registers all subscriber methods on {@code object} to receive events.
   *
   * @param object object whose subscriber methods should be registered.
   */
  public void register(Object object) {
    subscribers.register(object);
  }

  /**
   * Unregisters all subscriber methods on a registered {@code object}.
   *

          }
        };
    eventBus.register(subscriber);
    try {
      eventBus.post(EVENT);
    } catch (RuntimeException e) {
      fail("Exception should not be thrown.");
    }
  }

  public void testDeadEventForwarding() {
    GhostCatcher catcher = new GhostCatcher();
    bus.register(catcher);

    // A String -- an event for which no one has registered.
    bus.post(EVENT);

          }
        };
    eventBus.register(subscriber);
    try {
      eventBus.post(EVENT);
    } catch (RuntimeException e) {
      fail("Exception should not be thrown.");
    }
  }

  public void testDeadEventForwarding() {
    GhostCatcher catcher = new GhostCatcher();
    bus.register(catcher);

    // A String -- an event for which no one has registered.
    bus.post(EVENT);

                "Transfer listener is registered before test");
        wagonManager.getArtifact(artifact, repo, transferListener, false);
        assertFalse(
                wagon.getTransferEventSupport().hasTransferListener(transferListener),
                "Transfer listener still registered after getArtifact");

        /* putArtifact */

 * events to it.
 *
 * <p>Two subscribers are equivalent when they refer to the same method on the same object (not
 * class). This property is used to ensure that no subscriber method is registered more than once.
 *
 * @author Colin Decker
 */
@ElementTypesAreNonnullByDefault
class Subscriber {

  /** Creates a {@code Subscriber} for {@code method} on {@code listener}. */

    /**
     * Register the given listener which will receive all events.
     *
     * @param listener the listener to register
     * @throws NullPointerException if {@code listener} is null
     */
    void registerListener(@Nonnull Listener listener);

    /**
     * Unregisters a previously registered listener.
     *
     * @param listener the listener to unregister

import org.apache.maven.plugin.LegacySupport;
import org.apache.maven.project.ProjectBuilder;

/**
 * This realizes the metadata source via the default hint to provide backward-compat with Maven 2.x whose Plexus version
 * registered component descriptors twice: once keyed by role+roleHint and once keyed by role only. This effectively
 * made the metadata source available with its original role hint ("maven") as well as the default hint.
 *
 */
@Named

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

/**
 * Event sent by maven during various phases of the build process.
 * Such events can be listened to using {@link Listener}s objects
 * registered in the {@link Session}.
 *
 * @since 4.0.0
 */
@Experimental
public interface Event {

    /**
     * Gets the type of the event.
     *
     * @return the type of the event, never {@code null}

import org.apache.maven.execution.ExecutionListener;
import org.eclipse.aether.RepositoryListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Dispatches callbacks to all registered EventSpies.
 * @since 3.0.2
 */
@Named
@Singleton
public class EventSpyDispatcher {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    private final List<EventSpy> eventSpies;

public interface LifecycleExecutor {

    // USED BY MAVEN HELP PLUGIN
    @Deprecated
    String ROLE = LifecycleExecutor.class.getName();

    // For a given project packaging find all the plugins that are bound to any registered
    // lifecycles. The project builder needs to now what default plugin information needs to be
    // merged into POM being built. Once the POM builder has this plugin information, versions can be assigned