mirror of
https://github.com/Grasscutters/Grasscutter.git
synced 2026-05-19 10:29:50 +08:00
Run Spotless on src/main
This commit is contained in:
KingRainbow44
@@ -1,319 +1,321 @@
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package emu.grasscutter.plugin;
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import emu.grasscutter.Grasscutter;
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import emu.grasscutter.server.event.Event;
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import emu.grasscutter.server.event.EventHandler;
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import emu.grasscutter.server.event.HandlerPriority;
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import emu.grasscutter.utils.FileUtils;
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import emu.grasscutter.utils.JsonUtils;
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import lombok.AllArgsConstructor;
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import lombok.Getter;
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import javax.annotation.Nullable;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.InputStreamReader;
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import java.lang.reflect.Method;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.*;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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import static emu.grasscutter.utils.Language.translate;
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/**
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* Manages the server's plugins and the event system.
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*/
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public final class PluginManager {
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/* All loaded plugins. */
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private final Map<String, Plugin> plugins = new LinkedHashMap<>();
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/* All currently registered listeners per plugin. */
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private final Map<Plugin, List<EventHandler<? extends Event>>> listeners = new LinkedHashMap<>();
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public PluginManager() {
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this.loadPlugins(); // Load all plugins from the plugins directory.
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}
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/**
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* Loads plugins from the config-specified directory.
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*/
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private void loadPlugins() {
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File pluginsDir = FileUtils.getPluginPath("").toFile();
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if (!pluginsDir.exists() && !pluginsDir.mkdirs()) {
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Grasscutter.getLogger().error(translate("plugin.directory_failed", pluginsDir.getAbsolutePath()));
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return;
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}
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File[] files = pluginsDir.listFiles();
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if (files == null) {
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// The directory is empty, there aren't any plugins to load.
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return;
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}
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List<File> plugins = Arrays.stream(files)
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.filter(file -> file.getName().endsWith(".jar"))
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.toList();
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URL[] pluginNames = new URL[plugins.size()];
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plugins.forEach(plugin -> {
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try {
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pluginNames[plugins.indexOf(plugin)] = plugin.toURI().toURL();
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} catch (MalformedURLException exception) {
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Grasscutter.getLogger().warn(translate("plugin.unable_to_load"), exception);
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}
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});
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// Create a class loader for the plugins.
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URLClassLoader classLoader = new URLClassLoader(pluginNames);
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// Create a list of plugins that require dependencies.
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List<PluginData> dependencies = new ArrayList<>();
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// Initialize all plugins.
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for (var plugin : plugins) {
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try {
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URL url = plugin.toURI().toURL();
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try (URLClassLoader loader = new URLClassLoader(new URL[]{url})) {
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// Find the plugin.json file for each plugin.
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URL configFile = loader.findResource("plugin.json");
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// Open the config file for reading.
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InputStreamReader fileReader = new InputStreamReader(configFile.openStream());
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// Create a plugin config instance from the config file.
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PluginConfig pluginConfig = JsonUtils.loadToClass(fileReader, PluginConfig.class);
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// Check if the plugin config is valid.
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if (!pluginConfig.validate()) {
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Grasscutter.getLogger().warn(translate("plugin.invalid_config", plugin.getName()));
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return;
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}
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// Create a JAR file instance from the plugin's URL.
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JarFile jarFile = new JarFile(plugin);
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// Load all class files from the JAR file.
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Enumeration<JarEntry> entries = jarFile.entries();
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while (entries.hasMoreElements()) {
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JarEntry entry = entries.nextElement();
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if (entry.isDirectory() || !entry.getName().endsWith(".class") || entry.getName().contains("module-info"))
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continue;
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String className = entry.getName().replace(".class", "").replace("/", ".");
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classLoader.loadClass(className); // Use the same class loader for ALL plugins.
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}
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// Create a plugin instance.
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Class<?> pluginClass = classLoader.loadClass(pluginConfig.mainClass);
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Plugin pluginInstance = (Plugin) pluginClass.getDeclaredConstructor().newInstance();
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// Close the file reader.
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fileReader.close();
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// Check if the plugin has alternate dependencies.
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if (pluginConfig.loadAfter != null && pluginConfig.loadAfter.length > 0) {
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// Add the plugin to a "load later" list.
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dependencies.add(new PluginData(
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pluginInstance, PluginIdentifier.fromPluginConfig(pluginConfig),
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loader, pluginConfig.loadAfter));
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continue;
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}
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// Load the plugin.
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this.loadPlugin(pluginInstance, PluginIdentifier.fromPluginConfig(pluginConfig), loader);
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} catch (ClassNotFoundException ignored) {
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Grasscutter.getLogger().warn(translate("plugin.invalid_main_class", plugin.getName()));
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} catch (FileNotFoundException ignored) {
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Grasscutter.getLogger().warn(translate("plugin.missing_config", plugin.getName()));
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}
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} catch (Exception exception) {
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Grasscutter.getLogger().error(translate("plugin.failed_to_load_plugin", plugin.getName()), exception);
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}
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}
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// Load plugins with dependencies.
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int depth = 0;
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final int maxDepth = 30;
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while (!dependencies.isEmpty()) {
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// Check if the depth is too high.
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if (depth >= maxDepth) {
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Grasscutter.getLogger().error(translate("plugin.failed_to_load_dependencies"));
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break;
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}
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try {
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// Get the next plugin to load.
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var pluginData = dependencies.get(0);
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// Check if the plugin's dependencies are loaded.
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if (!this.plugins.keySet().containsAll(List.of(pluginData.getDependencies()))) {
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depth++; // Increase depth counter.
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continue; // Continue to next plugin.
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}
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// Remove the plugin from the list of dependencies.
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dependencies.remove(pluginData);
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// Load the plugin.
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this.loadPlugin(pluginData.getPlugin(), pluginData.getIdentifier(), pluginData.getClassLoader());
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} catch (Exception exception) {
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Grasscutter.getLogger().error(translate("plugin.failed_to_load"), exception);
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depth++;
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}
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}
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}
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/**
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* Load the specified plugin.
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*
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* @param plugin The plugin instance.
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*/
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private void loadPlugin(Plugin plugin, PluginIdentifier identifier, URLClassLoader classLoader) {
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Grasscutter.getLogger().info(translate("plugin.loading_plugin", identifier.name));
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// Add the plugin's identifier.
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try {
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Class<Plugin> pluginClass = Plugin.class;
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Method method = pluginClass.getDeclaredMethod("initializePlugin", PluginIdentifier.class, URLClassLoader.class);
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method.setAccessible(true);
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method.invoke(plugin, identifier, classLoader);
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method.setAccessible(false);
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} catch (Exception ignored) {
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Grasscutter.getLogger().warn(translate("plugin.failed_add_id", identifier.name));
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}
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// Add the plugin to the list of loaded plugins.
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this.plugins.put(identifier.name, plugin);
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// Create a collection for the plugin's listeners.
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this.listeners.put(plugin, new ArrayList<>());
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// Call the plugin's onLoad method.
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try {
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plugin.onLoad();
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} catch (Throwable exception) {
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Grasscutter.getLogger().error(translate("plugin.failed_to_load_plugin", identifier.name), exception);
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}
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}
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/**
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* Enables all registered plugins.
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*/
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public void enablePlugins() {
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this.plugins.forEach((name, plugin) -> {
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Grasscutter.getLogger().info(translate("plugin.enabling_plugin", name));
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try {
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plugin.onEnable();
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} catch (Throwable exception) {
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Grasscutter.getLogger().error(translate("plugin.enabling_failed", name), exception);
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}
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});
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}
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/**
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* Disables all registered plugins.
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*/
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public void disablePlugins() {
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this.plugins.forEach((name, plugin) -> {
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Grasscutter.getLogger().info(translate("plugin.disabling_plugin", name));
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this.disablePlugin(plugin);
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});
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}
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/**
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* Registers a plugin's event listener.
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*
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* @param plugin The plugin registering the listener.
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* @param listener The event listener.
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*/
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public void registerListener(Plugin plugin, EventHandler<? extends Event> listener) {
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this.listeners.get(plugin).add(listener);
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}
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/**
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* Invoke the provided event on all registered event listeners.
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*
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* @param event The event to invoke.
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*/
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public void invokeEvent(Event event) {
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EnumSet.allOf(HandlerPriority.class)
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.forEach(priority -> this.checkAndFilter(event, priority));
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}
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/**
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* Check an event to handlers for the priority.
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*
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* @param event The event being called.
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* @param priority The priority to call for.
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*/
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private void checkAndFilter(Event event, HandlerPriority priority) {
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// Add all listeners from every plugin.
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this.listeners.values().stream()
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.flatMap(Collection::stream)
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// Filter the listeners by priority.
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.filter(handler -> handler.handles().isInstance(event))
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.filter(handler -> handler.getPriority() == priority)
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// Invoke the event.
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.forEach(handler -> this.invokeHandler(event, handler));
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}
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/**
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* Gets a plugin's instance by its name.
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*
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* @param name The name of the plugin.
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* @return Either null, or the plugin's instance.
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*/
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@Nullable
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public Plugin getPlugin(String name) {
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return this.plugins.get(name);
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}
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/**
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* Enables a plugin.
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*
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* @param plugin The plugin to enable.
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*/
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public void enablePlugin(Plugin plugin) {
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try {
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// Call the plugin's onEnable method.
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plugin.onEnable();
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} catch (Exception exception) {
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Grasscutter.getLogger().error(translate("plugin.enabling_failed", plugin.getName()), exception);
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}
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}
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/**
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* Disables a plugin.
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*
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* @param plugin The plugin to disable.
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*/
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public void disablePlugin(Plugin plugin) {
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try {
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// Call the plugin's onDisable method.
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plugin.onDisable();
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} catch (Exception exception) {
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Grasscutter.getLogger().error(translate("plugin.disabling_failed", plugin.getName()), exception);
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}
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// Un-register all listeners.
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this.listeners.remove(plugin);
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}
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/**
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* Performs logic checks then invokes the provided event handler.
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*
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* @param event The event passed through to the handler.
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* @param handler The handler to invoke.
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*/
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@SuppressWarnings("unchecked")
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private <T extends Event> void invokeHandler(Event event, EventHandler<T> handler) {
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if (!event.isCanceled() ||
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(event.isCanceled() && handler.ignoresCanceled())
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) handler.getCallback().consume((T) event);
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}
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/* Data about an unloaded plugin. */
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@AllArgsConstructor
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@Getter
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static class PluginData {
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private Plugin plugin;
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private PluginIdentifier identifier;
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private URLClassLoader classLoader;
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private String[] dependencies;
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}
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}
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package emu.grasscutter.plugin;
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import static emu.grasscutter.utils.Language.translate;
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import emu.grasscutter.Grasscutter;
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import emu.grasscutter.server.event.Event;
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import emu.grasscutter.server.event.EventHandler;
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import emu.grasscutter.server.event.HandlerPriority;
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import emu.grasscutter.utils.FileUtils;
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import emu.grasscutter.utils.JsonUtils;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.InputStreamReader;
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import java.lang.reflect.Method;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.*;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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import javax.annotation.Nullable;
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import lombok.AllArgsConstructor;
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import lombok.Getter;
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/** Manages the server's plugins and the event system. */
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public final class PluginManager {
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/* All loaded plugins. */
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private final Map<String, Plugin> plugins = new LinkedHashMap<>();
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/* All currently registered listeners per plugin. */
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private final Map<Plugin, List<EventHandler<? extends Event>>> listeners = new LinkedHashMap<>();
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public PluginManager() {
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this.loadPlugins(); // Load all plugins from the plugins directory.
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}
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/** Loads plugins from the config-specified directory. */
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private void loadPlugins() {
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File pluginsDir = FileUtils.getPluginPath("").toFile();
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if (!pluginsDir.exists() && !pluginsDir.mkdirs()) {
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Grasscutter.getLogger()
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.error(translate("plugin.directory_failed", pluginsDir.getAbsolutePath()));
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return;
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}
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File[] files = pluginsDir.listFiles();
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if (files == null) {
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// The directory is empty, there aren't any plugins to load.
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return;
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}
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List<File> plugins =
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Arrays.stream(files).filter(file -> file.getName().endsWith(".jar")).toList();
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URL[] pluginNames = new URL[plugins.size()];
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plugins.forEach(
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plugin -> {
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try {
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pluginNames[plugins.indexOf(plugin)] = plugin.toURI().toURL();
|
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} catch (MalformedURLException exception) {
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Grasscutter.getLogger().warn(translate("plugin.unable_to_load"), exception);
|
||||
}
|
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});
|
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|
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// Create a class loader for the plugins.
|
||||
URLClassLoader classLoader = new URLClassLoader(pluginNames);
|
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// Create a list of plugins that require dependencies.
|
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List<PluginData> dependencies = new ArrayList<>();
|
||||
|
||||
// Initialize all plugins.
|
||||
for (var plugin : plugins) {
|
||||
try {
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URL url = plugin.toURI().toURL();
|
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try (URLClassLoader loader = new URLClassLoader(new URL[] {url})) {
|
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// Find the plugin.json file for each plugin.
|
||||
URL configFile = loader.findResource("plugin.json");
|
||||
// Open the config file for reading.
|
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InputStreamReader fileReader = new InputStreamReader(configFile.openStream());
|
||||
|
||||
// Create a plugin config instance from the config file.
|
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PluginConfig pluginConfig = JsonUtils.loadToClass(fileReader, PluginConfig.class);
|
||||
// Check if the plugin config is valid.
|
||||
if (!pluginConfig.validate()) {
|
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Grasscutter.getLogger().warn(translate("plugin.invalid_config", plugin.getName()));
|
||||
return;
|
||||
}
|
||||
|
||||
// Create a JAR file instance from the plugin's URL.
|
||||
JarFile jarFile = new JarFile(plugin);
|
||||
// Load all class files from the JAR file.
|
||||
Enumeration<JarEntry> entries = jarFile.entries();
|
||||
while (entries.hasMoreElements()) {
|
||||
JarEntry entry = entries.nextElement();
|
||||
if (entry.isDirectory()
|
||||
|| !entry.getName().endsWith(".class")
|
||||
|| entry.getName().contains("module-info")) continue;
|
||||
String className = entry.getName().replace(".class", "").replace("/", ".");
|
||||
classLoader.loadClass(className); // Use the same class loader for ALL plugins.
|
||||
}
|
||||
|
||||
// Create a plugin instance.
|
||||
Class<?> pluginClass = classLoader.loadClass(pluginConfig.mainClass);
|
||||
Plugin pluginInstance = (Plugin) pluginClass.getDeclaredConstructor().newInstance();
|
||||
// Close the file reader.
|
||||
fileReader.close();
|
||||
|
||||
// Check if the plugin has alternate dependencies.
|
||||
if (pluginConfig.loadAfter != null && pluginConfig.loadAfter.length > 0) {
|
||||
// Add the plugin to a "load later" list.
|
||||
dependencies.add(
|
||||
new PluginData(
|
||||
pluginInstance,
|
||||
PluginIdentifier.fromPluginConfig(pluginConfig),
|
||||
loader,
|
||||
pluginConfig.loadAfter));
|
||||
continue;
|
||||
}
|
||||
|
||||
// Load the plugin.
|
||||
this.loadPlugin(pluginInstance, PluginIdentifier.fromPluginConfig(pluginConfig), loader);
|
||||
} catch (ClassNotFoundException ignored) {
|
||||
Grasscutter.getLogger().warn(translate("plugin.invalid_main_class", plugin.getName()));
|
||||
} catch (FileNotFoundException ignored) {
|
||||
Grasscutter.getLogger().warn(translate("plugin.missing_config", plugin.getName()));
|
||||
}
|
||||
} catch (Exception exception) {
|
||||
Grasscutter.getLogger()
|
||||
.error(translate("plugin.failed_to_load_plugin", plugin.getName()), exception);
|
||||
}
|
||||
}
|
||||
|
||||
// Load plugins with dependencies.
|
||||
int depth = 0;
|
||||
final int maxDepth = 30;
|
||||
while (!dependencies.isEmpty()) {
|
||||
// Check if the depth is too high.
|
||||
if (depth >= maxDepth) {
|
||||
Grasscutter.getLogger().error(translate("plugin.failed_to_load_dependencies"));
|
||||
break;
|
||||
}
|
||||
|
||||
try {
|
||||
// Get the next plugin to load.
|
||||
var pluginData = dependencies.get(0);
|
||||
|
||||
// Check if the plugin's dependencies are loaded.
|
||||
if (!this.plugins.keySet().containsAll(List.of(pluginData.getDependencies()))) {
|
||||
depth++; // Increase depth counter.
|
||||
continue; // Continue to next plugin.
|
||||
}
|
||||
|
||||
// Remove the plugin from the list of dependencies.
|
||||
dependencies.remove(pluginData);
|
||||
|
||||
// Load the plugin.
|
||||
this.loadPlugin(
|
||||
pluginData.getPlugin(), pluginData.getIdentifier(), pluginData.getClassLoader());
|
||||
} catch (Exception exception) {
|
||||
Grasscutter.getLogger().error(translate("plugin.failed_to_load"), exception);
|
||||
depth++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Load the specified plugin.
|
||||
*
|
||||
* @param plugin The plugin instance.
|
||||
*/
|
||||
private void loadPlugin(Plugin plugin, PluginIdentifier identifier, URLClassLoader classLoader) {
|
||||
Grasscutter.getLogger().info(translate("plugin.loading_plugin", identifier.name));
|
||||
|
||||
// Add the plugin's identifier.
|
||||
try {
|
||||
Class<Plugin> pluginClass = Plugin.class;
|
||||
Method method =
|
||||
pluginClass.getDeclaredMethod(
|
||||
"initializePlugin", PluginIdentifier.class, URLClassLoader.class);
|
||||
method.setAccessible(true);
|
||||
method.invoke(plugin, identifier, classLoader);
|
||||
method.setAccessible(false);
|
||||
} catch (Exception ignored) {
|
||||
Grasscutter.getLogger().warn(translate("plugin.failed_add_id", identifier.name));
|
||||
}
|
||||
|
||||
// Add the plugin to the list of loaded plugins.
|
||||
this.plugins.put(identifier.name, plugin);
|
||||
// Create a collection for the plugin's listeners.
|
||||
this.listeners.put(plugin, new ArrayList<>());
|
||||
|
||||
// Call the plugin's onLoad method.
|
||||
try {
|
||||
plugin.onLoad();
|
||||
} catch (Throwable exception) {
|
||||
Grasscutter.getLogger()
|
||||
.error(translate("plugin.failed_to_load_plugin", identifier.name), exception);
|
||||
}
|
||||
}
|
||||
|
||||
/** Enables all registered plugins. */
|
||||
public void enablePlugins() {
|
||||
this.plugins.forEach(
|
||||
(name, plugin) -> {
|
||||
Grasscutter.getLogger().info(translate("plugin.enabling_plugin", name));
|
||||
try {
|
||||
plugin.onEnable();
|
||||
} catch (Throwable exception) {
|
||||
Grasscutter.getLogger().error(translate("plugin.enabling_failed", name), exception);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/** Disables all registered plugins. */
|
||||
public void disablePlugins() {
|
||||
this.plugins.forEach(
|
||||
(name, plugin) -> {
|
||||
Grasscutter.getLogger().info(translate("plugin.disabling_plugin", name));
|
||||
this.disablePlugin(plugin);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers a plugin's event listener.
|
||||
*
|
||||
* @param plugin The plugin registering the listener.
|
||||
* @param listener The event listener.
|
||||
*/
|
||||
public void registerListener(Plugin plugin, EventHandler<? extends Event> listener) {
|
||||
this.listeners.get(plugin).add(listener);
|
||||
}
|
||||
|
||||
/**
|
||||
* Invoke the provided event on all registered event listeners.
|
||||
*
|
||||
* @param event The event to invoke.
|
||||
*/
|
||||
public void invokeEvent(Event event) {
|
||||
EnumSet.allOf(HandlerPriority.class).forEach(priority -> this.checkAndFilter(event, priority));
|
||||
}
|
||||
|
||||
/**
|
||||
* Check an event to handlers for the priority.
|
||||
*
|
||||
* @param event The event being called.
|
||||
* @param priority The priority to call for.
|
||||
*/
|
||||
private void checkAndFilter(Event event, HandlerPriority priority) {
|
||||
// Add all listeners from every plugin.
|
||||
this.listeners.values().stream()
|
||||
.flatMap(Collection::stream)
|
||||
// Filter the listeners by priority.
|
||||
.filter(handler -> handler.handles().isInstance(event))
|
||||
.filter(handler -> handler.getPriority() == priority)
|
||||
// Invoke the event.
|
||||
.forEach(handler -> this.invokeHandler(event, handler));
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets a plugin's instance by its name.
|
||||
*
|
||||
* @param name The name of the plugin.
|
||||
* @return Either null, or the plugin's instance.
|
||||
*/
|
||||
@Nullable public Plugin getPlugin(String name) {
|
||||
return this.plugins.get(name);
|
||||
}
|
||||
|
||||
/**
|
||||
* Enables a plugin.
|
||||
*
|
||||
* @param plugin The plugin to enable.
|
||||
*/
|
||||
public void enablePlugin(Plugin plugin) {
|
||||
try {
|
||||
// Call the plugin's onEnable method.
|
||||
plugin.onEnable();
|
||||
} catch (Exception exception) {
|
||||
Grasscutter.getLogger()
|
||||
.error(translate("plugin.enabling_failed", plugin.getName()), exception);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Disables a plugin.
|
||||
*
|
||||
* @param plugin The plugin to disable.
|
||||
*/
|
||||
public void disablePlugin(Plugin plugin) {
|
||||
try {
|
||||
// Call the plugin's onDisable method.
|
||||
plugin.onDisable();
|
||||
} catch (Exception exception) {
|
||||
Grasscutter.getLogger()
|
||||
.error(translate("plugin.disabling_failed", plugin.getName()), exception);
|
||||
}
|
||||
|
||||
// Un-register all listeners.
|
||||
this.listeners.remove(plugin);
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs logic checks then invokes the provided event handler.
|
||||
*
|
||||
* @param event The event passed through to the handler.
|
||||
* @param handler The handler to invoke.
|
||||
*/
|
||||
@SuppressWarnings("unchecked")
|
||||
private <T extends Event> void invokeHandler(Event event, EventHandler<T> handler) {
|
||||
if (!event.isCanceled() || (event.isCanceled() && handler.ignoresCanceled()))
|
||||
handler.getCallback().consume((T) event);
|
||||
}
|
||||
|
||||
/* Data about an unloaded plugin. */
|
||||
@AllArgsConstructor
|
||||
@Getter
|
||||
static class PluginData {
|
||||
private Plugin plugin;
|
||||
private PluginIdentifier identifier;
|
||||
private URLClassLoader classLoader;
|
||||
private String[] dependencies;
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user