org.eclipse.aether.RepositorySystemSession Java Examples

@Override
public Artifact resolve(Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session) throws PluginResolutionException {
    WorkspaceReader wr = session.getWorkspaceReader();
    NbWorkspaceReader nbwr = null;
    if (wr instanceof NbWorkspaceReader) {
        nbwr = (NbWorkspaceReader)wr;
        //this only works reliably because the NbWorkspaceReader is part of the session, not a component
        nbwr.silence();
    }
    try {
        return super.resolve(plugin, repositories, session);
    } finally {
        if (nbwr != null) {
            nbwr.normal();
        }
    }
}
 

StagingContextImpl(File baseDir,
                   File outputDir,
                   Log log,
                   RepositorySystem repoSystem,
                   RepositorySystemSession repoSession,
                   List<RemoteRepository> remoteRepos,
                   ArchiverManager archiverManager) {

    this.baseDir = baseDir;
    this.outputDir = outputDir;
    this.log = log;
    this.repoSystem = repoSystem;
    this.repoSession = repoSession;
    this.remoteRepos = remoteRepos;
    this.archiverManager = Objects.requireNonNull(archiverManager, "archiverManager is null");
}
 

private RepositorySystem newRepositorySystem() {

		RepositorySystem repoSystem = new DefaultRepositorySystem() {
			@Override
			public ArtifactResult resolveArtifact( RepositorySystemSession session, ArtifactRequest request )
			throws ArtifactResolutionException {

				ArtifactResult res = new ArtifactResult( request );
				Artifact mavenArtifact = ResolveMojoTest.this.artifactIdToArtifact.get( request.getArtifact().getArtifactId());
				if( mavenArtifact == null )
					throw new ArtifactResolutionException( new ArrayList<ArtifactResult>( 0 ), "Error in test wrapper and settings." );

				org.eclipse.aether.artifact.DefaultArtifact art =
						new org.eclipse.aether.artifact.DefaultArtifact(
								"groupId", "artifactId", "classifier", "extension", "version",
								null, mavenArtifact.getFile());

				res.setArtifact( art );
				return res;
			}
		};

		return repoSystem;
	}
 

@BeforeEach
void before() throws Exception {
  Artifact projectArtifact = mock(Artifact.class);

  this.mavenProject = new MavenProject();
  this.mavenProject.setArtifact(projectArtifact);
  ProjectBuildingRequest projectBuildingRequest = mock(ProjectBuildingRequest.class);
  when(projectBuildingRequest.getRepositorySession()).thenReturn(mock(RepositorySystemSession.class));
  //noinspection deprecation
  this.mavenProject.setProjectBuildingRequest(projectBuildingRequest);

  this.globalFilter = mock(ArtifactFilter.class);
  ArtifactFilter transitiveIncludeExcludeFilter = mock(ArtifactFilter.class);
  ArtifactFilter targetFilter = mock(ArtifactFilter.class);
  this.graphBuilder = GraphBuilder.create(ToStringNodeIdRenderer.INSTANCE);

  this.dependenciesResolver = mock(ProjectDependenciesResolver.class);
  DependencyResolutionResult dependencyResolutionResult = mock(DependencyResolutionResult.class);
  when(dependencyResolutionResult.getDependencyGraph()).thenReturn(mock(org.eclipse.aether.graph.DependencyNode.class));
  when(this.dependenciesResolver.resolve(any(DependencyResolutionRequest.class))).thenReturn(dependencyResolutionResult);

  this.graphAdapter = new MavenGraphAdapter(this.dependenciesResolver, transitiveIncludeExcludeFilter, targetFilter, EnumSet.of(INCLUDED));
}
 

@SuppressWarnings("unchecked")
public static File getSdk(MavenProject project, RepositorySystem repoSystem, RepositorySystemSession repoSession,
                          List<RemoteRepository>... repos) throws MojoExecutionException {
    Artifact artifact = find(project.getPluginArtifacts(), new Predicate<Artifact>() {
        @Override
        public boolean apply(Artifact artifact1) {
            return artifact1.getArtifactId().equals("appengine-maven-plugin");
        }
    });

    String version = artifact.getVersion();

    if (version.endsWith("-SNAPSHOT")) {
        String newestVersion = determineNewestVersion(repoSystem, repoSession, repos);
        return getSdk(newestVersion, repoSystem, repoSession, repos);
    }

    return getSdk(version, repoSystem, repoSession, repos);
}
 

private MavenProject createMavenProject(String artifactId) {
  MavenProject project = new MavenProject();
  project.setArtifactId(artifactId);
  // Make sure that we can modify the list later.
  project.setCollectedProjects(new ArrayList<>());

  DefaultArtifact artifact = new DefaultArtifact("groupId", artifactId, "version", "compile", "jar", "", null);
  project.setArtifact(artifact);

  RepositorySystemSession repositorySession = mock(RepositorySystemSession.class);
  ProjectBuildingRequest projectBuildingRequest = mock(ProjectBuildingRequest.class);
  when(projectBuildingRequest.getRepositorySession()).thenReturn(repositorySession);
  //noinspection deprecation
  project.setProjectBuildingRequest(projectBuildingRequest);

  return project;
}
 

@Override
public void populateResult(RepositorySystemSession session,
	ArtifactDescriptorResult result,
	Model model) {
	super.populateResult(session, result, model);
	Parent parent = model.getParent();
	if (parent != null) {
		DefaultArtifact art =
			new DefaultArtifact(parent.getGroupId(),
				parent.getArtifactId(),
				"pom",
				parent.getVersion());
		Dependency dep = new Dependency(art, "compile");
		result.addDependency(dep);
	}
}
 

public static File getSdk(MavenProject project, RepositorySystem repoSystem, RepositorySystemSession repoSession, List<RemoteRepository>... repos)
        throws MojoExecutionException {
  Artifact artifact = (Artifact) find(project.getPluginArtifacts(), new Predicate<Artifact>() {
    @Override
    public boolean apply(Artifact artifact1) {
      return (artifact1.getArtifactId().equals("appengine-maven-plugin")
              && artifact1.getGroupId().equals("com.google.appengine"));
    }
  });

  String version = artifact.getVersion();
  
  if(version.endsWith("-SNAPSHOT")) {
    String newestVersion = determineNewestVersion(repoSystem, repoSession, repos);
    return getSdk(newestVersion, repoSystem, repoSession, repos);
  }

  return getSdk(version, repoSystem, repoSession, repos);
}
 

private List<String> getMavenParentDependencies(String parent)
		throws DependencyResolutionException, ArtifactDescriptorException {
	List<String> dependencies = new ArrayList<>();
	DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
	RepositorySystem system = newRepositorySystem(locator);
	RepositorySystemSession session = newSession(system);

	RemoteRepository central = new RemoteRepository.Builder("central", "default", "http://repo1.maven.org/maven2/")
			.build();

	org.eclipse.aether.artifact.Artifact artifact = new DefaultArtifact(parent);
	ArtifactDescriptorRequest request = new ArtifactDescriptorRequest(artifact, Arrays.asList(central), null);
	try {
		ArtifactDescriptorResult result = system.readArtifactDescriptor(session, request);
		for (org.eclipse.aether.graph.Dependency dependency : result.getManagedDependencies()) {
			dependencies.add(dependency.getArtifact().getGroupId() + ":" + dependency.getArtifact().getGroupId());
		}
	} catch (Exception e) {
		logger.error(e.getMessage());
	}
	return dependencies;

}
 

public static Set<Artifact> transitiveDependencies(Artifact artifact) {

    RepositorySystem system = newRepositorySystem();

    RepositorySystemSession session = newRepositorySystemSession(system);

    CollectRequest collectRequest = new CollectRequest();
    collectRequest.setRoot(new Dependency(artifact, ""));
    collectRequest.setRepositories(repositories());

    CollectResult collectResult = null;
    try {
      collectResult = system.collectDependencies(session, collectRequest);
    } catch (DependencyCollectionException e) {
      throw new RuntimeException(e);
    }

    PreorderNodeListGenerator visitor = new PreorderNodeListGenerator();
    collectResult.getRoot().accept(visitor);

    return ImmutableSet.copyOf(
      visitor.getNodes().stream()
        .filter(d -> !d.getDependency().isOptional())
        .map(DependencyNode::getArtifact)
        .collect(Collectors.toList()));
  }
 

@Override
public Path resolve(final RepositorySystemSession session, final List<RemoteRepository> repositories, final ArtifactName name) {
    final ArtifactResult result;
    try {
        final ArtifactRequest request = new ArtifactRequest();
        final Artifact defaultArtifact = new DefaultArtifact(name.getGroupId(), name.getArtifactId(), name.getClassifier(), name.getPackaging(), name.getVersion());
        request.setArtifact(defaultArtifact);
        request.setRepositories(repositories);
        result = repoSystem.resolveArtifact(session, request);
    } catch (ArtifactResolutionException e) {
        throw new RuntimeException(e.getMessage(), e);
    }
    if (!result.isResolved()) {
        throw new RuntimeException("Failed to resolve artifact " + name);
    }
    final Artifact artifact = result.getArtifact();
    final File artifactFile;
    if (artifact == null || (artifactFile = artifact.getFile()) == null) {
        throw new RuntimeException("Failed to resolve artifact " + name);
    }
    return artifactFile.toPath();
}
 

/**
 * Used by the Maven Plugin.
 * @param repositorySystem Maven repository system
 * @param remoteRepositories remote artifact repositories
 * @param session repository system session
 */
public AetherStubDownloader(RepositorySystem repositorySystem,
		List<RemoteRepository> remoteRepositories, RepositorySystemSession session,
		Settings settings) {
	this.deleteStubsAfterTest = true;
	this.remoteRepos = remoteRepositories;
	this.settings = settings;
	this.repositorySystem = repositorySystem;
	this.session = session;
	if (remoteReposMissing()) {
		log.error(
				"Remote repositories for stubs are not specified and work offline flag wasn't passed");
	}
	this.workOffline = false;
	registerShutdownHook();
}
 

public static Bom readBom(Path pomFile) throws MavenRepositoryException {
  RepositorySystem system = RepositoryUtility.newRepositorySystem();
  RepositorySystemSession session = RepositoryUtility.newSession(system);

  MavenProject mavenProject = RepositoryUtility.createMavenProject(pomFile, session);
  String coordinates = mavenProject.getGroupId() + ":" + mavenProject.getArtifactId() 
      + ":" + mavenProject.getVersion();
  DependencyManagement dependencyManagement = mavenProject.getDependencyManagement();
  List<org.apache.maven.model.Dependency> dependencies = dependencyManagement.getDependencies();

  ArtifactTypeRegistry registry = session.getArtifactTypeRegistry();
  ImmutableList<Artifact> artifacts = dependencies.stream()
      .map(dependency -> RepositoryUtils.toDependency(dependency, registry))
      .map(Dependency::getArtifact)
      .filter(artifact -> !shouldSkipBomMember(artifact))
      .collect(ImmutableList.toImmutableList());
  
  Bom bom = new Bom(coordinates, artifacts);
  return bom;
}
 

@Override
public CollectResult collectDependencies(RepositorySystemSession session, CollectRequest request) throws DependencyCollectionException {
    DefaultRepositorySystemSession cloned = new DefaultRepositorySystemSession(session);
    DependencyGraphTransformer transformer = session.getDependencyGraphTransformer();
    //need to reset the transformer to prevent the transformation to happen and to it below separately.
    cloned.setDependencyGraphTransformer(null);
    CollectResult res = super.collectDependencies(cloned, request);
    CloningDependencyVisitor vis = new CloningDependencyVisitor();
    res.getRoot().accept(vis);

    //this part copied from DefaultDependencyCollector
    try {
        DefaultDependencyGraphTransformationContext context =
                new DefaultDependencyGraphTransformationContext(session);
        res.setRoot(transformer.transformGraph(res.getRoot(), context));
    } catch (RepositoryException e) {
        res.addException(e);
    }

    if (!res.getExceptions().isEmpty()) {
        throw new DependencyCollectionException(res);
    }
    res.getRoot().setData("NB_TEST", vis.getRootNode());
    return res;
}
 

public List<Version> getAllVersions(String groupId, String artifactId) {
    String repositoryUrl = "http://maven.repo/nexus/content/groups/public";
    RepositorySystem repoSystem = newRepositorySystem();

    RepositorySystemSession session = newSession(repoSystem);
    RemoteRepository central = null;
    central = new RemoteRepository.Builder("central", "default", repositoryUrl).build();

    Artifact artifact = new DefaultArtifact(groupId + ":" + artifactId + ":[0,)");
    VersionRangeRequest rangeRequest = new VersionRangeRequest();
    rangeRequest.setArtifact(artifact);
    rangeRequest.addRepository(central);
    VersionRangeResult rangeResult;
    try {
        rangeResult = repoSystem.resolveVersionRange(session, rangeRequest);
    } catch (VersionRangeResolutionException e) {
        throw new RuntimeException(e);
    }
    List<Version> versions = rangeResult.getVersions().stream()
            .filter(v -> !v.toString().toLowerCase().endsWith("-snapshot"))
            .filter(v -> !groupId.contains("org.springframework") || v.toString().equals("2.0.0.RELEASE"))
            .collect(Collectors.toList());
    logger.info("artifact: {}, Available versions: {}", artifact, versions);
    return versions;
}
 

@Override
public DependencyNode resolve(Plugin plugin, Artifact pluginArtifact, DependencyFilter dependencyFilter, List<RemoteRepository> repositories, RepositorySystemSession session) throws PluginResolutionException {
    
    WorkspaceReader wr = session.getWorkspaceReader();
    NbWorkspaceReader nbwr = null;
    if (wr instanceof NbWorkspaceReader) {
        nbwr = (NbWorkspaceReader)wr;
        //this only works reliably because the NbWorkspaceReader is part of the session, not a component
        nbwr.silence();
    }
    try {
        return super.resolve(plugin, pluginArtifact, dependencyFilter, repositories, session);
    } finally {
        if (nbwr != null) {
            nbwr.normal();
        }
    }
}
 

public BatchStubRunner run(StubRunnerOptions options,
		RepositorySystemSession repositorySystemSession) {
	StubDownloader stubDownloader = this.aetherStubDownloaderFactory
			.build(repositorySystemSession).build(options);
	try {
		if (log.isDebugEnabled()) {
			log.debug("Launching StubRunner with args: " + options);
		}
		BatchStubRunner stubRunner = new BatchStubRunnerFactory(options,
				stubDownloader).buildBatchStubRunner();
		RunningStubs runningCollaborators = stubRunner.runStubs();
		log.info(runningCollaborators.toString());
		return stubRunner;
	}
	catch (Exception e) {
		log.error("An exception occurred while trying to execute the stubs: "
				+ e.getMessage());
		throw e;
	}

}
 

/**
 * Calculates the set of transitive dependencies of the passed artifacts.
 * 
 * @param repositoryParameters
 * @param artifacts
 * @param artifactScope
 * @return a list of File locations where the JARs of the dependencies are located in the local file system
 * @throws DependencyResolutionException
 */
public static List<File> getDependencies(final IRepositoryParameters repositoryParameters,
                                         final List<ArtifactItem> artifacts, final ArtifactScope artifactScope)
        throws DependencyResolutionException {
    final RepositorySystem system = repositoryParameters.getRepositorySystem();
    final RepositorySystemSession session = repositoryParameters.getRepositorySystemSession();
    final DependencyFilter classpathFlter = DependencyFilterUtils.classpathFilter(artifactScope.getScopeValue());
    final Set<File> artifactFiles = new HashSet<>();
    for (final ArtifactItem artifactItem : artifacts) {
        Artifact artifact = createDefaultArtifact(artifactItem);
        final CollectRequest collectRequest = new CollectRequest();
        collectRequest.setRoot(new Dependency(artifact, artifactScope.getScopeValue()));
        collectRequest.setRepositories(repositoryParameters.getRemoteRepositories());
        final DependencyRequest dependencyRequest = new DependencyRequest(collectRequest, classpathFlter);
        final DependencyResult dependencyResult = system.resolveDependencies(session, dependencyRequest);
        final List<ArtifactResult> artifactResults = dependencyResult.getArtifactResults();
        for (final ArtifactResult artifactResult : artifactResults) {
            artifactFiles.add(artifactResult.getArtifact().getFile());
        }
    }
    return new ArrayList<>(artifactFiles);
}
 

private static String determineNewestVersion(RepositorySystem repoSystem, RepositorySystemSession repoSession,
                                             List<RemoteRepository>[] repos) throws MojoExecutionException {
    String version;
    VersionRangeRequest rangeRequest = new VersionRangeRequest();
    rangeRequest.setArtifact(new DefaultArtifact(SDK_GROUP_ID + ":" + SDK_ARTIFACT_ID + ":[0,)"));
    for (List<RemoteRepository> repoList : repos) {
        for (RemoteRepository repo : repoList) {
            rangeRequest.addRepository(repo);
        }
    }

    VersionRangeResult rangeResult;
    try {
        rangeResult = repoSystem.resolveVersionRange(repoSession, rangeRequest);
    } catch (VersionRangeResolutionException e) {
        throw new MojoExecutionException("Could not resolve latest version of the App Engine Java SDK", e);
    }

    List<Version> versions = rangeResult.getVersions();

    Collections.sort(versions);

    Version newest = Iterables.getLast(versions);

    version = newest.toString();
    return version;
}
 

/**
 * Aether and its components are designed to be stateless. All configurations and state
 * are provided through the RepositorySystemSession.
 *
 * TODO(petros): Separate this out into its own class.
 * This is the most intricate element of Aether.
 * There are various settings that are useful to us.
 * Specifically, these are the (1) LocalRepositoryManager, (2) DependencyManager,
 * (3) DependencyGraphTransformer, (4) TransferListener, (5) ProxySelector
 */
static RepositorySystemSession newRepositorySession(RepositorySystem system) {
  DefaultRepositorySystemSession session = MavenRepositorySystemUtils.newSession();

  // TODO(petros): Decide on where to cache things.
  LocalRepository localRepository = new LocalRepository("target/local-repo");
  session.setLocalRepositoryManager(system.newLocalRepositoryManager(session, localRepository));

  session.setDependencyManager(new ClassicDependencyManager());
  return session;
}
 

private VersionRangeResult getVersions(RepositorySystem system, Settings settings, RepositorySystemSession session,
         List<RemoteRepository> repositories,
         String addonName,
         String version)
{
   try
   {
      String[] split = addonName.split(",");
      if (split.length == 2)
      {
         version = split[1];
      }
      if (version == null || version.isEmpty())
      {
         version = "[,)";
      }
      else if (!version.matches("(\\(|\\[).*?(\\)|\\])"))
      {
         version = "[" + version + "]";
      }

      Artifact artifact = new DefaultArtifact(toMavenCoords(AddonId.from(addonName, version)));
      VersionRangeRequest rangeRequest = new VersionRangeRequest(artifact, repositories, null);
      VersionRangeResult rangeResult = system.resolveVersionRange(session, rangeRequest);
      return rangeResult;
   }
   catch (Exception e)
   {
      throw new RuntimeException("Failed to look up versions for [" + addonName + "]", e);
   }
}
 

public MavenArtifactResolvingHelperTest() {
    sessionMock = Mockito.mock(RepositorySystemSession.class);
    MirrorSelector mirrorSelectorMock = Mockito.mock(MirrorSelector.class);
    Mockito.when(sessionMock.getMirrorSelector()).thenReturn(mirrorSelectorMock);
    ProxySelector proxySelectorMock = Mockito.mock(ProxySelector.class);
    Mockito.when(sessionMock.getProxySelector()).thenReturn(proxySelectorMock);
    localRepositoryManager = Mockito.mock(LocalRepositoryManager.class);
    Mockito.when(sessionMock.getLocalRepositoryManager()).thenReturn(localRepositoryManager);
    resolver = Mockito.mock(ArtifactResolver.class);
    system = Mockito.mock(RepositorySystem.class);

}
 

@Override
public LocalMetadataResult find(RepositorySystemSession session, LocalMetadataRequest request) {
    final LocalMetadataResult result = delegate.find(session, request);
    if (result.getFile() != null && result.getFile().exists()) {
        return result;
    }
    final Metadata metadata = request.getMetadata();
    final Path userRepoPath = getMetadataPath(userLocalRepo, metadata.getGroupId(), metadata.getArtifactId(),
            metadata.getType(), metadata.getVersion());
    if (!Files.exists(userRepoPath)) {
        return result;
    }
    if (relinkResolvedArtifacts) {
        final Path creatorRepoPath = getMetadataPath(appCreatorRepo, metadata.getGroupId(), metadata.getArtifactId(),
                metadata.getType(), metadata.getVersion());
        try {
            IoUtils.copy(userRepoPath, creatorRepoPath);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to copy " + userRepoPath + " to a staging repo", e);
        }
        result.setFile(creatorRepoPath.toFile());
    } else {
        result.setFile(userRepoPath.toFile());
    }
    metadata.setFile(result.getFile());
    return result;
}
 

@Override
public RepositoryConnector newInstance(RepositorySystemSession session, RemoteRepository repository) throws NoRepositoryConnectorException {
    // Throwing NoRepositoryConnectorException is ineffective because DefaultRemoteRepositoryManager will just skip to WagonRepositoryConnectorFactory.
    // (No apparent way to suppress WRCF from the Plexus container; using "wagon" as the role hint does not work.)
    // Could also return a no-op RepositoryConnector which would perform no downloads.
    // But we anyway want to ensure that related code is consistently setting the offline flag on all Maven structures that require it.
    // Throwing NoRepositoryConnectorException is ineffective because DefaultRemoteRepositoryManager will just skip to WagonRepositoryConnectorFactory.
    // (No apparent way to suppress WRCF from the Plexus container; using "wagon" as the role hint does not work.)
    // Could also return a no-op RepositoryConnector which would perform no downloads.
    // But we anyway want to ensure that related code is consistently setting the offline flag on all Maven structures that require it.
    throw new AssertionError();
}
 

/**
 * Tries to find the newest version of the artifact that matches given regular expression.
 * The found version will be older than the {@code upToVersion} or newest available if {@code upToVersion} is null.
 *
 * @param gav the coordinates of the artifact. The version part is ignored
 * @param upToVersion the version up to which the versions will be matched
 * @param versionMatcher the matcher to match the version
 * @param remoteOnly true if only remotely available artifacts should be considered
 * @param upToInclusive whether the {@code upToVersion} should be considered inclusive or exclusive
 * @return the resolved artifact
 */
public Artifact resolveNewestMatching(String gav, @Nullable String upToVersion, Pattern versionMatcher,
                                      boolean remoteOnly, boolean upToInclusive)
        throws VersionRangeResolutionException, ArtifactResolutionException {


    Artifact artifact = new DefaultArtifact(gav);
    artifact = artifact.setVersion(upToVersion == null ? "[,)" : "[," + upToVersion + (upToInclusive ? "]" : ")"));
    VersionRangeRequest rangeRequest = new VersionRangeRequest(artifact, repositories, null);

    RepositorySystemSession session = remoteOnly ? makeRemoteOnly(this.session) : this.session;

    VersionRangeResult result = repositorySystem.resolveVersionRange(session, rangeRequest);

    List<Version> versions = new ArrayList<>(result.getVersions());
    Collections.reverse(versions);

    for(Version v : versions) {
        if (versionMatcher.matcher(v.toString()).matches()) {
            return resolveArtifact(artifact.setVersion(v.toString()), session);
        }
    }

    throw new VersionRangeResolutionException(result) {
        @Override
        public String getMessage() {
            return "Failed to find a version of artifact '" + gav + "' that would correspond to an expression '"
                    + versionMatcher + "'. The versions found were: " + versions;
        }
    };
}
 

/**
 * This method fetches the artifact from the remote server using aether library
 * 
 * @param groupId group ID of the artifact
 * @param artifactId artifact ID of the artifact
 * @param version artifact version to be downloaded
 * @param classifier classifier of the artifact
 * @param packaging packaging of the artifact
 * @param localRepository destination path
 * @return location of the downloaded artifact in the local system
 * @throws IOException
 */
public static File getArtifactByAether(String groupId, String artifactId, String version, String classifier, String packaging, File localRepository) throws IOException {
	RepositorySystem repositorySystem = newRepositorySystem();
	RepositorySystemSession session = newSession(repositorySystem, localRepository);

	Artifact artifact = new DefaultArtifact(groupId, artifactId, classifier, packaging, version);
	ArtifactRequest artifactRequest = new ArtifactRequest();
	artifactRequest.setArtifact(artifact);

	List<RemoteRepository> repositories = new ArrayList<>();
	Section ini = Utils.getConfig().get(Constants.INI_URL_HEADER);

	RemoteRepository remoteRepository = new RemoteRepository.Builder("public", "default", ini.get(Constants.INI_NEXUS_SOOT_RELEASE)).build();

	repositories.add(remoteRepository);

	artifactRequest.setRepositories(repositories);
	File result = null;

	try {
		ArtifactResult artifactResult = repositorySystem.resolveArtifact(session, artifactRequest);
		artifact = artifactResult.getArtifact();
		if (artifact != null) {
			result = artifact.getFile();
		}
	}
	catch (ArtifactResolutionException e) {
		throw new IOException("Artifact " + groupId + ":" + artifactId + ":" + version + " could not be downloaded due to " + e.getMessage());
	}

	return result;

}
 

@Override
public Object get(RepositorySystemSession session, Object key) {
    final Object result = delegate.get(session, key);
    if (result == null) {
        logger.info("cache-get-miss-" + miss.incrementAndGet() + ":" + session + " " + key);
    } else {
        logger.info("cache-get-hit-" + hit.incrementAndGet() + ":" + session + " " + key + " result:" + result);
    }
    return result;
}
 

/**
 * Returns the latest Maven coordinates for {@code groupId:artifactId} in {@code
 * repositorySystem}.
 */
public static String findLatestCoordinates(
    RepositorySystem repositorySystem, String groupId, String artifactId)
    throws MavenRepositoryException {
  RepositorySystemSession session = RepositoryUtility.newSession(repositorySystem);
  String highestVersion = findHighestVersion(repositorySystem, session, groupId, artifactId);
  return String.format("%s:%s:%s", groupId, artifactId, highestVersion);
}
 

@Before
public void setUp() throws Exception {
    when(repositorySystem.collectDependencies(Mockito.<RepositorySystemSession>any(), Mockito.<CollectRequest>any())).thenReturn(new CollectResult(new CollectRequest()).setRoot(root));
    project = File.createTempFile(FOO, TEMP);
    assertThat(project.delete(), is(true));
    assertThat(project.mkdir(), is(true));
}
 

public static void main(String[] args) throws ArtifactDescriptorException {
  DefaultArtifact artifact =
      new DefaultArtifact("com.google.cloud:libraries-bom:pom:1.0.0");

  RepositorySystemSession session = RepositoryUtility.newSession(system);

  ArtifactDescriptorRequest request = new ArtifactDescriptorRequest();
  request.addRepository(RepositoryUtility.CENTRAL);
  request.setArtifact(artifact);

  ArtifactDescriptorResult resolved = system.readArtifactDescriptor(session, request);
  for (Dependency dependency : resolved.getManagedDependencies()) {
    System.out.println(dependency);
  }
}