return ArtifactUtils.versionlessKey(project.getGroupId(), project.getArtifactId());
    }

    public void registerBuildFailure(MavenProject project, Exception error, String task, long time) {
        buildFailuresByProject.put(getProjectKey(project), new BuildFailure(project, time, error));
    }

    public boolean hasBuildFailures() {
        return !buildFailuresByProject.isEmpty();
    }

     * Entry point to the execution strategy
     *
     * @param mojos             list of mojos representing a project build
     * @param session           current session
     * @param mojoExecutionRunner mojo execution task which must be invoked by a strategy to actually run it
     * @throws LifecycleExecutionException
     */
    void execute(List<MojoExecution> mojos, MavenSession session, MojoExecutionRunner mojoExecutionRunner)

 * ExecutionException}, the exception's {@linkplain #getCause() cause} comes from a failed task,
 * possibly run in another thread.
 *
 * <p>{@code UncheckedExecutionException} is intended as an alternative to {@code
 * ExecutionException} when the exception thrown by a task is an unchecked exception. However, it
 * may also wrap a checked exception in some cases.
 *

    final CyclicBarrier firstBarrier = new CyclicBarrier(2);
    final CyclicBarrier secondBarrier = new CyclicBarrier(2);
    final AtomicBoolean shouldWait = new AtomicBoolean(true);
    Runnable task =
        new Runnable() {
          @Override
          public void run() {
            try {
              if (shouldWait.get()) {
                firstBarrier.await();
                secondBarrier.await();

                if (connection != null) {
                    connection.disconnect();
                }
            }
        };
        if (threadPool != null) {
            threadPool.execute(task);
        } else {
            task.run();
        }
    }

    protected HttpURLConnection open(final URL u) throws IOException {

 * the License.
 */

package com.google.common.util.concurrent;

import com.google.common.annotations.GwtCompatible;
import java.util.concurrent.Executor;

/**
 * An {@link Executor} that runs each task in the thread that invokes {@link Executor#execute
 * execute}.
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
enum DirectExecutor implements Executor {
  INSTANCE;

  @Override

    assertFalse(listenableFuture.isDone());

    listenableFuture.addListener(singleCallListener, directExecutor());
    /*
     * Don't shut down until the listenInPoolThread task has been accepted to
     * run. We want to see what happens when it's interrupted, not when it's
     * rejected.
     */
    submitSuccessful.await();
    executorService.shutdownNow();

    assertThat(exceptions).isEmpty();
  }

  private static List<Throwable> runThreadsAndReturnExceptions(int numThreads, Runnable task) {
    List<Thread> threads = new ArrayList<>(numThreads);
    final List<Throwable> exceptions = new ArrayList<>(numThreads);
    for (int i = 0; i < numThreads; i++) {
      Thread thread = new Thread(task);
      thread.setUncaughtExceptionHandler(

    final CyclicBarrier firstBarrier = new CyclicBarrier(2);
    final CyclicBarrier secondBarrier = new CyclicBarrier(2);
    final AtomicBoolean shouldWait = new AtomicBoolean(true);
    Runnable task =
        new Runnable() {
          @Override
          public void run() {
            try {
              if (shouldWait.get()) {
                firstBarrier.await();
                secondBarrier.await();

          }
        });
  }

  private long doMultithreadedLoop(Callable<Long> task)
      throws InterruptedException, ExecutionException {

    List<Future<Long>> futures = Lists.newArrayListWithCapacity(threads);
    for (int i = 0; i < threads; i++) {
      futures.add(threadPool.submit(task));
    }
    long total = 0;
    for (Future<Long> future : futures) {
      total += future.get();
    }