Files.deleteIfExists(target);
                    Files.createLink(target, source);
                } catch (UnsupportedOperationException | IOException suppressed) {
                    LOGGER.info("Copying {} to project local repository.", artifact);
                    try {
                        Files.copy(
                                source,
                                target,

     * Called when the service transitions to the {@linkplain State#STOPPING STOPPING} state. The
     * only valid values for {@code from} are {@linkplain State#STARTING STARTING} or {@linkplain
     * State#RUNNING RUNNING}. This occurs when {@link Service#stopAsync} is called.
     *
     * @param from The previous state that is being transitioned from.
     */
    public void stopping(State from) {}

    /**

import org.gradle.api.services.BuildService
import org.gradle.api.services.BuildServiceParameters
import org.gradle.tooling.events.FinishEvent
import org.gradle.tooling.events.OperationCompletionListener
import org.gradle.tooling.events.task.TaskFinishEvent
import org.gradle.tooling.events.task.TaskOperationResult
import java.io.Serializable

/**

     * Called when the service transitions to the {@linkplain State#STOPPING STOPPING} state. The
     * only valid values for {@code from} are {@linkplain State#STARTING STARTING} or {@linkplain
     * State#RUNNING RUNNING}. This occurs when {@link Service#stopAsync} is called.
     *
     * @param from The previous state that is being transitioned from.
     */
    public void stopping(State from) {}

    /**

   * blocks, it can prevent this service from changing state. If you need to performing a blocking
   * operation in order to trigger shutdown, consider instead registering a listener and
   * implementing {@code stopping}. Note, however, that {@code stopping} does not run at exactly the
   * same times as {@code triggerShutdown}.
   */
  protected void triggerShutdown() {}

  /**

              @Override
              public List<String> getResult() {
                return result;
              }
            });
  }

  /**
   * Streams lines from a {@link File}, stopping when our callback returns false, or we have read
   * all of the lines.
   *
   * @param file the file to read from
   * @param charset the charset used to decode the input stream; see {@link StandardCharsets} for

    assertEquals(1, service.shutDownCalled);
    assertEquals(Service.State.TERMINATED, service.state());
    assertThat(service.transitionStates)
        .containsExactly(Service.State.STARTING, Service.State.STOPPING)
        .inOrder();
  }

  public void testStop_failed() {
    Exception exception = new Exception("deliberate");
    TestService service =
        new TestService() {
          @Override

    assertEquals(1, service.shutDownCalled);
    assertEquals(Service.State.TERMINATED, service.state());
    assertThat(service.transitionStates)
        .containsExactly(Service.State.STARTING, Service.State.STOPPING)
        .inOrder();
  }

  public void testStop_failed() {
    Exception exception = new Exception("deliberate");
    TestService service =
        new TestService() {
          @Override

h3. Plugins

* Execution model
* Metadata model
* Metadata tooling
 ** Metadata extractor
 ** Metadata reader
 ** Metadata writer
 ** Metadata adapter (if required for the target system)
* Maven packaging and lifecycle
* Maven test harness for plugin execution model
* Eclipse IDE tooling for plugin execution model and metadata model

- we also seem to have information like the plugin lifecycle model that's buried inside the maven execution model

    assertFalse(service.startUpCalled);

    service.startAsync().awaitRunning();
    assertTrue(service.startUpCalled);
    assertEquals(Service.State.RUNNING, service.state());

    enterRun.await(); // to avoid stopping the service until run() is invoked

    service.stopAsync().awaitTerminated();
    assertTrue(service.shutDownCalled);
    assertEquals(Service.State.TERMINATED, service.state());
    executionThread.join();
  }