String msg = str + " mojo is already being executed "
                            + "on the project " + session.getCurrentProject().getGroupId()
                            + ":" + session.getCurrentProject().getArtifactId() + ". "
                            + "This mojo execution will be blocked "
                            + "until the mojo is done.";
                    warn(msg);

    }

    /*
    @Test
    public void testExclusionsInDependencies()
        throws Exception
    {
        MavenSession session = createMavenSession( null );
        MavenProject project = session.getCurrentProject();

        Exclusion exclusion = new Exclusion();
        exclusion.setGroupId( "org.apache.maven.its" );
        exclusion.setArtifactId( "a" );

                    throws LifecycleExecutionException {
                super.execute(session, mojoExecutions);
                currentProjects.add(session.getCurrentProject());
            }
        };

        final DefaultMavenExecutionResult defaultMavenExecutionResult = new DefaultMavenExecutionResult();

        return request;
    }

    public void setCurrentProject(MavenProject currentProject) {
        this.currentProject.set(currentProject);
    }

    public MavenProject getCurrentProject() {
        return currentProject.get();
    }

    public ProjectBuildingRequest getProjectBuildingRequest() {
        return request.getProjectBuildingRequest().setRepositorySession(getRepositorySession());

            DependencyFilter filter)
            throws PluginResolutionException, PluginContainerException {
        Plugin plugin = pluginDescriptor.getPlugin();
        MavenProject project = session.getCurrentProject();

        if (plugin.isExtensions()) {
            ExtensionRealmCache.CacheRecord extensionRecord;
            try {
                RepositorySystemSession repositorySession = session.getRepositorySession();

            mergedSegment.getTasks().addAll(taskSegment.getTasks());
        }

        return lifecycleExecutionPlanCalculator.calculateExecutionPlan(
                session, session.getCurrentProject(), mergedSegment.getTasks(), setup);
    }

    public MavenExecutionPlan calculateExecutionPlan(MavenSession session, String... tasks)

            throws MojoFailureException, MojoExecutionException, PluginConfigurationException, PluginManagerException {
        MavenProject project = session.getCurrentProject();

        MojoDescriptor mojoDescriptor = mojoExecution.getMojoDescriptor();

        Mojo mojo = null;

        ClassRealm pluginRealm;
        try {