DefaultPlexusContainer container()

in daemon-m39/src/main/java/org/apache/maven/cli/DaemonMavenCli.java [481:557]
66 lines of code
6 McCabe index (conditional complexity)

    DefaultPlexusContainer container() throws Exception {
        ClassRealm coreRealm = classWorld.getClassRealm("plexus.core");
        if (coreRealm == null) {
            coreRealm = classWorld.getRealms().iterator().next();
        }

        List<File> extClassPath = Stream.of(
                        Environment.MVND_EXT_CLASSPATH.asString().split(","))
                .filter(s -> s != null && !s.isEmpty())
                .map(File::new)
                .collect(Collectors.toList());

        CoreExtensionEntry coreEntry = CoreExtensionEntry.discoverFrom(coreRealm);

        List<CoreExtension> extensions = Stream.of(
                        Environment.MVND_CORE_EXTENSIONS.asString().split(";"))
                .filter(s -> s != null && !s.isEmpty())
                .map(s -> {
                    String[] parts = s.split(":");
                    CoreExtension ce = new CoreExtension();
                    ce.setGroupId(parts[0]);
                    ce.setArtifactId(parts[1]);
                    ce.setVersion(parts[2]);
                    return ce;
                })
                .collect(Collectors.toList());
        List<CoreExtensionEntry> extensionsEntries =
                loadCoreExtensions(extensions, coreRealm, coreEntry.getExportedArtifacts());
        ClassRealm containerRealm = setupContainerRealm(classWorld, coreRealm, extClassPath, extensionsEntries);

        ContainerConfiguration cc = new DefaultContainerConfiguration()
                .setClassWorld(classWorld)
                .setRealm(containerRealm)
                .setClassPathScanning(PlexusConstants.SCANNING_INDEX)
                .setAutoWiring(true)
                .setJSR250Lifecycle(true)
                .setName("maven");

        Set<String> exportedArtifacts = new HashSet<>(coreEntry.getExportedArtifacts());
        Set<String> exportedPackages = new HashSet<>(coreEntry.getExportedPackages());
        for (CoreExtensionEntry extension : extensionsEntries) {
            exportedArtifacts.addAll(extension.getExportedArtifacts());
            exportedPackages.addAll(extension.getExportedPackages());
        }
        exportedPackages.add("org.codehaus.plexus.components.interactivity");
        exportedPackages.add("org.mvndaemon.mvnd.interactivity");
        exportedArtifacts.add("org.codehaus.plexus:plexus-interactivity-api");

        final CoreExports exports = new CoreExports(containerRealm, exportedArtifacts, exportedPackages);

        final DefaultPlexusContainer container = new DefaultPlexusContainer(cc, new AbstractModule() {
            @Override
            protected void configure() {
                bind(ILoggerFactory.class).toInstance(slf4jLoggerFactory);
                bind(CoreExports.class).toInstance(exports);
                bind(ExtensionRealmCache.class).to(InvalidatingExtensionRealmCache.class);
                bind(PluginArtifactsCache.class).to(InvalidatingPluginArtifactsCache.class);
                bind(PluginRealmCache.class).to(InvalidatingPluginRealmCache.class);
                bind(ProjectArtifactsCache.class).to(InvalidatingProjectArtifactsCache.class);
                bind(PluginVersionResolver.class).to(CachingPluginVersionResolver.class);
            }
        });

        // NOTE: To avoid inconsistencies, we'll use the TCCL exclusively for lookups
        container.setLookupRealm(null);
        Thread.currentThread().setContextClassLoader(container.getContainerRealm());

        container.setLoggerManager(plexusLoggerManager);

        for (CoreExtensionEntry extension : extensionsEntries) {
            container.discoverComponents(
                    extension.getClassRealm(),
                    new SessionScopeModule(container),
                    new MojoExecutionScopeModule(container));
        }
        return container;
    }