Examples with Dependency org.lanternpowered.launch.dependencies.Dependency used on opensource projects

Example 1 with Dependency

use of org.lanternpowered.launch.dependencies.Dependency in project LanternServer by LanternPowered.

the class LanternClassLoader method load.

private static LanternClassLoader load() throws IOException {
    ClassLoader.registerAsParallelCapable();
    // Get the bootstrap class loader
    final ClassLoader classLoader = LanternClassLoader.class.getClassLoader();
    // Load the dependencies files
    final List<Dependencies> dependenciesEntries = new ArrayList<>();
    // Load the dependencies file within the jar, not available in the IDE
    final URL dependenciesURL = classLoader.getResource("dependencies.json");
    if (dependenciesURL != null) {
        try {
            dependenciesEntries.add(DependenciesParser.read(new BufferedReader(new InputStreamReader(dependenciesURL.openStream()))));
        } catch (ParseException e) {
            throw new IllegalStateException("Failed to parse the dependencies.json file within the jar.", e);
        }
    }
    // Try to generate or load the dependencies file
    final Path dependenciesFile = Paths.get("dependencies.json");
    if (!Files.exists(dependenciesFile)) {
        try (BufferedWriter writer = Files.newBufferedWriter(dependenciesFile)) {
            writer.write("{\n    \"repositories\": [\n    ],\n    \"dependencies\": [\n    ]\n}");
        }
    } else {
        try {
            dependenciesEntries.add(DependenciesParser.read(Files.newBufferedReader(dependenciesFile)));
        } catch (ParseException e) {
            throw new IllegalStateException("Failed to parse the dependencies.json file within the root directory.", e);
        }
    }
    // Merge the dependencies files
    final List<URL> repositoryUrls = new ArrayList<>();
    final Map<String, Dependency> dependencyMap = new HashMap<>();
    for (Dependencies dependencies : dependenciesEntries) {
        dependencies.getRepositories().stream().map(Repository::getUrl).filter(e -> !repositoryUrls.contains(e)).forEach(repositoryUrls::add);
        for (Dependency dependency : dependencies.getDependencies()) {
            dependencyMap.put(dependency.getGroup() + ':' + dependency.getName(), dependency);
        }
    }
    String localRepoPath = System.getProperty("maven.repo.local");
    if (localRepoPath == null) {
        final String mavenHome = System.getenv("M2_HOME");
        if (mavenHome != null) {
            final Path settingsPath = Paths.get(mavenHome, "conf", "setting.xml");
            if (Files.exists(settingsPath)) {
                try {
                    final DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
                    final Document document = documentBuilder.parse(settingsPath.toFile());
                    // http://stackoverflow.com/questions/13786607/normalization-in-dom-parsing-with-java-how-does-it-work
                    document.getDocumentElement().normalize();
                    final Node node = document.getElementsByTagName("localRepository").item(0);
                    if (node != null) {
                        localRepoPath = node.getTextContent();
                    }
                } catch (ParserConfigurationException | SAXException e) {
                    throw new IllegalStateException(e);
                }
            }
        }
    }
    if (localRepoPath == null) {
        localRepoPath = "~/.m/repository";
    }
    localRepoPath = localRepoPath.trim();
    if (localRepoPath.charAt(0) == '~') {
        localRepoPath = System.getProperty("user.home") + '/' + localRepoPath.substring(2);
    }
    // Try to find the local maven repository
    repositoryUrls.add(0, new File(localRepoPath).toURL());
    final List<FileRepository> repositories = new ArrayList<>();
    for (URL repositoryUrl : repositoryUrls) {
        if (repositoryUrl.getProtocol().equals("file")) {
            final File baseFile = new File(repositoryUrl.getFile());
            repositories.add(path -> {
                final File file = new File(baseFile, path);
                try {
                    return file.exists() ? file.toURL().openStream() : null;
                } catch (IOException e) {
                    throw new IllegalStateException(e);
                }
            });
        } else {
            String repositoryUrlBase = repositoryUrl.toString();
            if (repositoryUrlBase.endsWith("/")) {
                repositoryUrlBase = repositoryUrlBase.substring(0, repositoryUrlBase.length() - 1);
            }
            final String urlBase = repositoryUrlBase;
            repositories.add(path -> {
                try {
                    final URL url = new URL(urlBase + "/" + path);
                    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    final String encoding = connection.getHeaderField("Content-Encoding");
                    InputStream is = connection.getInputStream();
                    if (encoding != null) {
                        if (encoding.equals("gzip")) {
                            is = new GZIPInputStream(is);
                        } else {
                            throw new IllegalStateException("Unsupported encoding: " + encoding);
                        }
                    }
                    return is;
                } catch (IOException e) {
                    return null;
                }
            });
        }
    }
    // If we are outside development mode, the server will be packed
    // into a jar. We will also need to make sure that this one gets
    // added in this case
    final CodeSource source = LanternClassLoader.class.getProtectionDomain().getCodeSource();
    final URL location = source == null ? null : source.getLocation();
    // Setup the environment variable
    final String env = System.getProperty(ENVIRONMENT);
    final Environment environment;
    if (env != null) {
        try {
            environment = Environment.valueOf(env.toUpperCase());
        } catch (IllegalArgumentException e) {
            throw new RuntimeException("Invalid environment type: " + env);
        }
    } else {
        environment = location == null || new File(location.getFile()).isDirectory() ? Environment.DEVELOPMENT : Environment.PRODUCTION;
        System.setProperty(ENVIRONMENT, environment.toString().toLowerCase());
    }
    Environment.set(environment);
    // Scan the jar for library jars
    if (location != null) {
        repositories.add(path -> classLoader.getResourceAsStream("dependencies/" + path));
    }
    final List<URL> libraryUrls = new ArrayList<>();
    // Download or load all the dependencies
    final Path internalLibrariesPath = Paths.get(".cached-dependencies");
    for (Dependency dependency : dependencyMap.values()) {
        final String group = dependency.getGroup();
        final String name = dependency.getName();
        final String version = dependency.getVersion();
        final Path target = internalLibrariesPath.resolve(String.format("%s/%s/%s/%s-%s.jar", group.replace('.', '/'), name, version, name, version));
        libraryUrls.add(target.toUri().toURL());
        final String id = String.format("%s:%s:%s", dependency.getGroup(), dependency.getName(), dependency.getVersion());
        if (Files.exists(target)) {
            System.out.printf("Loaded: \"%s\"\n", id);
            continue;
        }
        InputStream is = null;
        for (FileRepository repository : repositories) {
            is = repository.get(dependency);
            if (is != null) {
                break;
            }
        }
        if (is == null) {
            throw new IllegalStateException("The following dependency could not be found: " + id);
        }
        final Path parent = target.getParent();
        if (!Files.exists(parent)) {
            Files.createDirectories(parent);
        }
        System.out.printf("Downloading \"%s\"\n", id);
        try (ReadableByteChannel i = Channels.newChannel(is);
            FileOutputStream o = new FileOutputStream(target.toFile())) {
            o.getChannel().transferFrom(i, 0, Long.MAX_VALUE);
        }
    }
    // All the folders are from lantern or sponge,
    // in development mode are all the libraries on
    // the classpath, so there is no need to add them
    // to the library classloader
    final List<URL> urls = new ArrayList<>();
    final String classPath = System.getProperty("java.class.path");
    final String[] libraries = classPath.split(File.pathSeparator);
    for (String library : libraries) {
        try {
            final URL url = Paths.get(library).toUri().toURL();
            if (!library.endsWith(".jar") || url.equals(location)) {
                urls.add(url);
            }
        } catch (MalformedURLException ignored) {
            System.out.println("Invalid library found in the class path: " + library);
        }
    }
    // The server class loader will load lantern, the api and all the plugins
    final LanternClassLoader serverClassLoader = new LanternClassLoader(urls.toArray(new URL[urls.size()]), libraryUrls.toArray(new URL[libraryUrls.size()]), classLoader);
    Thread.currentThread().setContextClassLoader(serverClassLoader);
    return serverClassLoader;
}