*/
    void onStdin(@Nullable StdinHandler handler);

    /**
     * Registers a handler for when this connection is disconnected unexpectedly.. The handler is notified at most once.
     *
     * The handler is not notified after any of the following occurs:
     * <ul>
     * <li>When the connection is closed using {@link #stop()}.</li>
     * </ul>
     *

 */
package org.gradle.internal.operations;

import org.gradle.internal.service.scopes.EventScope;
import org.gradle.internal.service.scopes.Scope.Global;

/**
 * A listener that is notified as build operations are executed.
 *
 * Listeners must be registered via {@link BuildOperationListenerManager}, not ListenerManager.
 *

        when:
        buildFile << """
            task t { doFirst { throw new Exception("!") } }
            notifier.notify {
                println "failure message: \${it.failure.cause.message}"
                System.err.println "notified"
            }
            // user logic registered _after_ listener registered
            gradle.projectsEvaluated {

    }

    def "end of build listener is notified on success"() {
        when:
        succeeds succeedingTaskName

        then:
        plugin.assertEndOfBuildWithFailure(output, null)

        when:
        succeeds succeedingTaskName

        then:
        plugin.assertEndOfBuildWithFailure(output, null)
    }

    def "end of build listener is notified on failure"() {
        when:

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gradle.internal.featurelifecycle;

/**
 * Notified when a deprecated feature is used.
 *
 * <p>Implementations need not be thread-safe.
 */
public interface FeatureHandler<T extends FeatureUsage> {
    void featureUsed(T usage);

 */
package org.gradle.api.artifacts;

import org.gradle.internal.service.scopes.EventScope;
import org.gradle.internal.service.scopes.Scope;

/**
 * A {@code DependencyResolutionListener} is notified as dependencies are resolved.
 */
@EventScope(Scope.Build.class)
public interface DependencyResolutionListener {
    /**
     * This method is called immediately before a set of dependencies are resolved.
     *

         */
        void visit(ArtifactVisitor visitor);
    }

    /**
     * A listener that is notified as artifacts are made available while visiting the contents of a set. Implementations must be thread safe as they are notified from multiple threads concurrently.
     */
    interface Visitor {
        /**

 * Tracks some state for build operations of a given type.
 */
public interface BuildOperationTracker {
    /**
     * Returns the trackers that are used by this tracker. If this tracker is required, then its trackers should be notified of
     * build operation execution. If this tracker is not required, the trackers can be ignored.
     */
    default List<? extends BuildOperationTracker> getTrackers() {
        return Collections.emptyList();
    }

        // However, it is not always known whether a dependency will be scheduled or not when it is added here.
        // For example, the dependency may later be filtered from the graph and this set is never notified that it is complete
        // This lifecycle could be simplified and allow the dependencies to be discarded at this point
        pruned = false;
        waitingFor.add(node);
        return this;
    }

import org.gradle.internal.service.scopes.EventScope;
import org.gradle.internal.service.scopes.Scope.Global;
import org.gradle.launcher.daemon.context.DaemonConnectDetails;

/**
 * Notified when a daemon is started.
 */
@EventScope(Global.class)
public interface DaemonStartListener {
    void daemonStarted(DaemonConnectDetails daemonInfo);