private List loadCoreExtensions()

in daemon-m40/src/main/java/org/apache/maven/cli/DaemonMavenCli.java [636:694]
57 lines of code
4 McCabe index (conditional complexity)

    private List<CoreExtensionEntry> loadCoreExtensions(
            List<CoreExtension> extensions, ClassRealm containerRealm, Set<String> providedArtifacts) {
        try {
            if (extensions.isEmpty()) {
                return Collections.emptyList();
            }
            ContainerConfiguration cc = new DefaultContainerConfiguration() //
                    .setClassWorld(classWorld) //
                    .setRealm(containerRealm) //
                    .setClassPathScanning(PlexusConstants.SCANNING_INDEX) //
                    .setAutoWiring(true) //
                    .setJSR250Lifecycle(true) //
                    .setName("maven");

            DefaultPlexusContainer container = new DefaultPlexusContainer(cc, new AbstractModule() {
                @Override
                protected void configure() {
                    bind(ILoggerFactory.class).toInstance(slf4jLoggerFactory);
                }
            });
            MavenExecutionRequestPopulator executionRequestPopulator = null;
            try {
                CliRequest cliRequest = new CliRequest(new String[0], classWorld);
                cliRequest.commandLine = new CommandLine.Builder().build();
                container.setLookupRealm(null);
                container.setLoggerManager(plexusLoggerManager);
                container.getLoggerManager().setThresholds(cliRequest.request.getLoggingLevel());
                Thread.currentThread().setContextClassLoader(container.getContainerRealm());
                executionRequestPopulator = container.lookup(MavenExecutionRequestPopulator.class);
                final Map<String, ConfigurationProcessor> configurationProcessors =
                        container.lookupMap(ConfigurationProcessor.class);
                final EventSpyDispatcher eventSpyDispatcher = container.lookup(EventSpyDispatcher.class);
                properties(cliRequest);
                configure(cliRequest, eventSpyDispatcher, configurationProcessors);
                LoggingExecutionListener executionListener = container.lookup(LoggingExecutionListener.class);
                populateRequest(
                        cliRequest,
                        cliRequest.request,
                        eventSpyDispatcher,
                        container.lookup(ModelProcessor.class),
                        createTransferListener(cliRequest),
                        buildEventListener,
                        executionListener);
                executionRequestPopulator.populateDefaults(cliRequest.request);
                BootstrapCoreExtensionManager resolver = container.lookup(BootstrapCoreExtensionManager.class);
                return Collections.unmodifiableList(
                        resolver.loadCoreExtensions(cliRequest.request, providedArtifacts, extensions));
            } finally {
                executionRequestPopulator = null;
                container.dispose();
            }
        } catch (RuntimeException e) {
            // runtime exceptions are most likely bugs in maven, let them bubble up to the user
            throw e;
        } catch (Exception e) {
            slf4jLogger.warn("Failed to load extensions descriptor {}: {}", extensions, e.getMessage());
        }
        return Collections.emptyList();
    }