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- /*
- * Copyright (c) 2006-2017 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
- * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
- * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
- package com.dmdirc.plugins;
-
- import com.dmdirc.config.ConfigFileBackedConfigProvider;
- import com.dmdirc.config.InvalidIdentityFileException;
- import com.dmdirc.events.PluginLoadedEvent;
- import com.dmdirc.events.PluginUnloadedEvent;
- import com.dmdirc.interfaces.EventBus;
- import com.dmdirc.interfaces.config.ConfigProvider;
- import com.dmdirc.interfaces.config.IdentityController;
- import com.dmdirc.util.validators.ValidationResponse;
-
- import java.io.IOException;
- import java.io.InputStream;
- import java.nio.file.DirectoryStream;
- import java.nio.file.FileSystem;
- import java.nio.file.FileSystems;
- import java.nio.file.FileVisitResult;
- import java.nio.file.Files;
- import java.nio.file.Path;
- import java.nio.file.SimpleFileVisitor;
- import java.nio.file.attribute.BasicFileAttributes;
- import java.util.ArrayList;
- import java.util.Collection;
- import java.util.Collections;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
-
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
-
- import dagger.ObjectGraph;
-
- import static com.dmdirc.util.LogUtils.APP_ERROR;
- import static com.dmdirc.util.LogUtils.USER_ERROR;
-
- /**
- * Stores plugin metadata and handles loading of plugin resources.
- */
- public class PluginInfo implements ServiceProvider {
-
- private static final Logger LOG = LoggerFactory.getLogger(PluginInfo.class);
- /** The metadata for this plugin. */
- private final PluginMetaData metaData;
- /** The manager to use to look up other plugins. */
- private final PluginManager pluginManager;
- /** The manager to register services with. */
- private final ServiceManager serviceManager;
- /** The object graph to pass to plugins for DI purposes. */
- private final ObjectGraph objectGraph;
- /** The controller to add and remove settings from. */
- private final IdentityController identityController;
- /** Filename for this plugin (taken from URL). */
- private final String filename;
- /** The actual Plugin from this jar. */
- private Plugin plugin;
- /** The classloader used for this Plugin. */
- private PluginClassLoader pluginClassLoader;
- /** List of classes this plugin has. */
- private final List<String> myClasses = new ArrayList<>();
- /** Last Error Message. */
- private String lastError = "No Error";
- /** Are we trying to load? */
- private boolean isLoading;
- /** List of services we provide. */
- private final List<Service> provides = new ArrayList<>();
- /** List of children of this plugin. */
- private final List<PluginInfo> children = new ArrayList<>();
- /** Map of exports. */
- private final Map<String, ExportInfo> exports = new HashMap<>();
- /** List of configuration providers. */
- private final Collection<ConfigFileBackedConfigProvider> configProviders = new ArrayList<>();
- /** Event bus to post plugin loaded events to. */
- private final EventBus eventBus;
- /** File system for the plugin's jar. */
- private final FileSystem pluginFilesystem;
-
- /**
- * Create a new PluginInfo.
- *
- * @param metadata The plugin's metadata information
- * @param eventBus Event bus to post event loaded events on.
- * @param identityController The identity controller to add and remove settings from.
- * @param objectGraph The object graph to give to plugins for DI purposes.
- *
- * @throws PluginException if there is an error loading the Plugin
- */
- public PluginInfo(
- final PluginManager pluginManager,
- final ServiceManager serviceManager,
- final PluginMetaData metadata,
- final EventBus eventBus,
- final IdentityController identityController,
- final ObjectGraph objectGraph) throws PluginException {
- this.pluginManager = pluginManager;
- this.serviceManager = serviceManager;
- this.objectGraph = objectGraph;
- this.eventBus = eventBus;
- this.identityController = identityController;
- this.filename = metadata.getPluginPath().getFileName().toString();
- this.metaData = metadata;
-
- try {
- pluginFilesystem = FileSystems.newFileSystem(metadata.getPluginPath(), null);
- } catch (IOException ex) {
- lastError = "Error loading filesystem: " + ex.getMessage();
- throw new PluginException("Plugin " + filename + " failed to load. " + lastError, ex);
- }
- updateClassList();
-
- if (!myClasses.contains(metadata.getMainClass())) {
- lastError = "main class file (" + metadata.getMainClass() + ") not found in jar.";
- throw new PluginException("Plugin " + filename + " failed to load. " + lastError);
- }
-
- updateProvides();
- getDefaults();
- }
-
- public PluginMetaData getMetaData() {
- return metaData;
- }
-
- public String getFilename() {
- return filename;
- }
-
- public Plugin getPlugin() {
- return plugin;
- }
-
- public PluginClassLoader getPluginClassLoader() {
- return pluginClassLoader;
- }
-
- public String getLastError() {
- return lastError;
- }
-
- /**
- * Updates the list of known classes within this plugin from the specified resource manager.
- */
- private void updateClassList() throws PluginException {
- myClasses.clear();
- try {
- Files.walkFileTree(pluginFilesystem.getPath("/"), new SimpleFileVisitor<Path>() {
-
- @Override
- public FileVisitResult visitFile(final Path file, final BasicFileAttributes attrs) {
- if (file.getFileName().toString().endsWith(".class")) {
- final String classname = file.toAbsolutePath().toString().replace('/',
- '.');
- myClasses.add(classname.substring(1, classname.length() - 6));
- }
- return FileVisitResult.CONTINUE;
- }
- });
- } catch (IOException ex) {
- lastError = "Error loading classes: " + ex.getMessage();
- throw new PluginException("Plugin " + filename + " failed to load. " + lastError, ex);
- }
- }
-
- /**
- * Gets the {@link ObjectGraph} that should be used when loading this plugin.
- *
- * <p>
- * Where this plugin has a parent which returns a non-null graph from
- * {@link Plugin#getObjectGraph()} that object graph will be used unmodified. Otherwise, the
- * global object graph will be used.
- *
- * @return An {@link ObjectGraph} to be used.
- */
- protected ObjectGraph getObjectGraph() {
- if (metaData.getParent() != null) {
- final PluginInfo parentInfo = pluginManager.getPluginInfoByName(metaData.getParent());
- final Plugin parent = parentInfo.getPlugin();
- final ObjectGraph parentGraph = parent.getObjectGraph();
- if (parentGraph != null) {
- return parentGraph;
- }
- }
-
- return objectGraph;
- }
-
- /**
- * Get the defaults, formatters and icons for this plugin.
- */
- private void getDefaults() {
- final ConfigProvider defaults = identityController.getAddonSettings();
-
- LOG.trace("{}: Using domain '{}'", new Object[]{metaData.getName(), getDomain()});
-
- for (Map.Entry<String, String> entry : metaData.getDefaultSettings().entrySet()) {
- final String key = entry.getKey();
- final String value = entry.getValue();
-
- defaults.setOption(getDomain(), key, value);
- }
-
- for (Map.Entry<String, String> entry : metaData.getFormatters().entrySet()) {
- final String key = entry.getKey();
- final String value = entry.getValue();
-
- defaults.setOption("formatter", key, value);
- }
-
- for (Map.Entry<String, String> entry : metaData.getIcons().entrySet()) {
- final String key = entry.getKey();
- final String value = entry.getValue();
-
- defaults.setOption("icon", key, value);
- }
- }
-
- /**
- * Try get the identities for this plugin. This will unload any identities previously loaded by
- * this plugin.
- */
- private void loadIdentities() {
- if (!Files.exists(pluginFilesystem.getPath("/META-INF/identities/"))) {
- return;
- }
- try {
- unloadIdentities();
- try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(
- pluginFilesystem.getPath("/META-INF/identities/"))) {
- directoryStream.forEach(this::loadIdentity);
- }
- } catch (final IOException ioe) {
- LOG.warn(USER_ERROR, "Error finding identities in plugin '{}'", metaData.getName(),
- ioe);
- }
- }
-
- private void loadIdentity(final Path path) {
- if (!Files.isRegularFile(path)) {
- // Don't try to load folders etc
- return;
- }
-
- try (final InputStream stream = Files.newInputStream(path)) {
- synchronized (configProviders) {
- final ConfigFileBackedConfigProvider configProvider =
- new ConfigFileBackedConfigProvider(stream, false);
- identityController.addConfigProvider(configProvider);
- configProviders.add(configProvider);
- }
- } catch (InvalidIdentityFileException ex) {
- LOG.warn(USER_ERROR, "Error with identity file '{}' in plugin '{}'",
- path.getFileName(), metaData.getName(), ex);
- } catch (IOException ex) {
- LOG.warn(USER_ERROR, "Unable to load identity file '{}' in plugin '{}'",
- path.getFileName(), metaData.getName(), ex);
- }
- }
-
- /**
- * Unload any identities loaded by this plugin.
- */
- private void unloadIdentities() {
- synchronized (configProviders) {
- configProviders.forEach(identityController::removeConfigProvider);
- configProviders.clear();
- }
- }
-
- /**
- * Update provides list.
- */
- private void updateProvides() {
- // Remove us from any existing provides lists.
- synchronized (provides) {
- for (Service service : provides) {
- service.delProvider(this);
- }
- provides.clear();
- }
-
- // Get services provided by this plugin
- final Collection<String> providesList = metaData.getServices();
- if (providesList != null) {
- for (String item : providesList) {
- final String[] bits = item.split(" ");
- final String name = bits[0];
- final String type = bits.length > 1 ? bits[1] : "misc";
-
- if (!"any".equalsIgnoreCase(name) && !"export".equalsIgnoreCase(type)) {
- final Service service = serviceManager.getService(type, name, true);
- synchronized (provides) {
- service.addProvider(this);
- provides.add(service);
- }
- }
- }
- }
-
- updateExports();
- }
-
- /**
- * Called when the plugin is updated using the updater. Reloads metaData and updates the list of
- * files.
- */
- public void pluginUpdated() throws PluginException {
- updateClassList();
- updateMetaData();
- updateProvides();
- getDefaults();
- }
-
- /**
- * Try to reload the metaData from the plugin.config file. If this fails, the old data will be
- * used still.
- *
- * @return true if metaData was reloaded ok, else false.
- */
- private boolean updateMetaData() {
- metaData.load();
-
- return !metaData.hasErrors();
- }
-
- /**
- * Returns a path inside the plugin's jar for the given name.
- *
- * @param first The path string or initial part of the path string
- * @param more Additional strings to be joined to form the full path
- *
- * @return The resulting path inside the plugin's jar
- */
- public Path getPath(final String first, final String... more) {
- return pluginFilesystem.getPath(first, more);
- }
-
- @Override
- public final boolean isActive() {
- return isLoaded();
- }
-
- @Override
- public void activateServices() {
- loadPlugin();
- }
-
- @Override
- public String getProviderName() {
- return "Plugin: " + metaData.getFriendlyName() + " ("
- + metaData.getName() + " / " + getFilename() + ')';
- }
-
- @Override
- public List<Service> getServices() {
- synchronized (provides) {
- return new ArrayList<>(provides);
- }
- }
-
- /**
- * Is this plugin loaded?
- *
- * @return True if the plugin is currently loaded, false otherwise
- */
- public boolean isLoaded() {
- return plugin != null;
- }
-
- /**
- * Load any required plugins or services.
- *
- * @return True if all requirements have been satisfied, false otherwise
- */
- protected boolean loadRequirements() {
- return loadRequiredPlugins() && loadRequiredServices();
- }
-
- /**
- * Attempts to load all services that are required by this plugin.
- *
- * @return True iff all required services were found and satisfied
- */
- protected boolean loadRequiredServices() {
- for (String serviceInfo : metaData.getRequiredServices()) {
- final String[] parts = serviceInfo.split(" ", 2);
-
- if ("any".equals(parts[0])) {
- Service best = null;
- boolean found = false;
-
- for (Service service : serviceManager.getServicesByType(parts[1])) {
- if (service.isActive()) {
- found = true;
- break;
- }
-
- best = service;
- }
-
- if (!found && best != null) {
- found = best.activate();
- }
-
- if (!found) {
- return false;
- }
- } else {
- final Service service = serviceManager.getService(parts[1], parts[0]);
-
- if (service == null || !service.activate()) {
- return false;
- }
- }
- }
-
- return true;
- }
-
- /**
- * Attempts to load all plugins that are required by this plugin.
- *
- * @return True if all required plugins were found and loaded
- */
- protected boolean loadRequiredPlugins() {
- final String required = metaData.getRequirements().get("plugins");
-
- if (required != null) {
- for (String pluginName : required.split(",")) {
- final String[] data = pluginName.split(":");
- if (!data[0].trim().isEmpty() && !loadRequiredPlugin(data[0])) {
- return false;
- }
- }
- }
-
- return metaData.getParent() == null || loadRequiredPlugin(metaData.getParent());
- }
-
- /**
- * Attempts to load the specified required plugin.
- *
- * @param name The name of the plugin to be loaded
- *
- * @return True if the plugin was found and loaded, false otherwise
- */
- protected boolean loadRequiredPlugin(final String name) {
- LOG.info("Loading required plugin '{}' for plugin {}",
- new Object[]{name, metaData.getName()});
-
- final PluginInfo pi = pluginManager.getPluginInfoByName(name);
-
- if (pi == null) {
- return false;
- }
-
- pi.loadPlugin();
- return true;
- }
-
- /**
- * Load the plugin files.
- */
- public void loadPlugin() {
- if (isLoaded() || isLoading) {
- lastError = "Not Loading: (" + isLoaded() + "||" + isLoading + ')';
- return;
- }
-
- updateProvides();
- isLoading = true;
-
- if (!loadRequirements()) {
- isLoading = false;
- lastError = "Unable to satisfy dependencies for " + metaData.getName();
- return;
- }
-
- loadIdentities();
- loadMainClass();
-
- if (isLoaded()) {
- //TODO plugin loading shouldn't be done from here, event bus shouldn't be here.
- eventBus.publishAsync(new PluginLoadedEvent(this));
- }
-
- isLoading = false;
- }
-
- /**
- * Add the given Plugin as a child of this plugin.
- *
- * @param child Child to add
- */
- public void addChild(final PluginInfo child) {
- children.add(child);
- }
-
- /**
- * Remove the given Plugin as a child of this plugin.
- *
- * @param child Child to remove
- */
- public void delChild(final PluginInfo child) {
- children.remove(child);
- }
-
- /**
- * Returns a list of this plugin's children.
- *
- * @return List of child plugins
- */
- public List<PluginInfo> getChildren() {
- return Collections.unmodifiableList(children);
- }
-
- /**
- * Initialises this plugin's classloader.
- */
- private void initialiseClassLoader() {
- if (pluginClassLoader == null) {
- final PluginClassLoader[] loaders = new PluginClassLoader[metaData.getParent() == null
- ? 0 : 1];
-
- if (metaData.getParent() != null) {
- final String parentName = metaData.getParent();
- final PluginInfo parent = pluginManager.getPluginInfoByName(parentName);
- parent.addChild(this);
- loaders[0] = parent.getPluginClassLoader();
-
- if (loaders[0] == null) {
- // Not loaded? Try again...
-
- parent.loadPlugin();
- loaders[0] = parent.getPluginClassLoader();
-
- if (loaders[0] == null) {
- lastError = "Unable to get classloader from required parent '" + parentName
- + "' for " + metaData.getName();
- return;
- }
- }
- }
-
- pluginClassLoader = new PluginClassLoader(this, pluginManager.getGlobalClassLoader(),
- loaders);
- }
- }
-
- /**
- * Load the main class
- */
- private void loadMainClass() {
- final String classname = metaData.getMainClass();
- try {
- initialiseClassLoader();
-
- // Don't reload a class if its already loaded.
- if (pluginClassLoader.isClassLoaded(classname, true)) {
- lastError = "Classloader says we are already loaded.";
- return;
- }
-
- final Class<?> clazz = pluginClassLoader.loadClass(classname);
- if (clazz == null) {
- lastError = "Class '" + classname + "' was not able to load.";
- return;
- }
-
- createMainClass(clazz);
- } catch (ClassNotFoundException cnfe) {
- lastError = "Class not found ('" + filename + ':' + classname + ':'
- + classname.equals(metaData.getMainClass()) + "') - "
- + cnfe.getMessage();
- LOG.info(USER_ERROR, lastError, cnfe);
- } catch (NoClassDefFoundError ncdf) {
- lastError = "Unable to instantiate plugin ('" + filename + ':'
- + classname + ':'
- + classname.equals(metaData.getMainClass())
- + "') - Unable to find class: " + ncdf.getMessage();
- LOG.info(USER_ERROR, lastError, ncdf);
- } catch (VerifyError ve) {
- lastError = "Unable to instantiate plugin ('" + filename + ':'
- + classname + ':'
- + classname.equals(metaData.getMainClass())
- + "') - Incompatible: " + ve.getMessage();
- LOG.info(USER_ERROR, lastError, ve);
- } catch (IllegalArgumentException | ReflectiveOperationException ex) {
- lastError = "Unable to instantiate class for plugin " + metaData.getName()
- + ": " + classname;
- LOG.info(APP_ERROR, lastError, ex);
- }
- }
-
- private void createMainClass(final Class<?> clazz) throws InstantiationException,
- IllegalAccessException {
- final Object temp = clazz.newInstance();
- if (temp instanceof Plugin) {
- final ValidationResponse prerequisites = ((Plugin) temp).checkPrerequisites();
- if (prerequisites.isFailure()) {
- lastError = "Prerequisites for plugin not met. ('"
- + filename + ':' + metaData.getMainClass()
- + "' -> '" + prerequisites.getFailureReason() + "') ";
- LOG.info(USER_ERROR, lastError);
- } else {
- initialisePlugin((Plugin) temp);
- }
- }
- }
-
- private void initialisePlugin(final Plugin temp) {
- plugin = temp;
- try {
- plugin.load(this, getObjectGraph());
- plugin.onLoad();
- } catch (LinkageError | Exception e) {
- lastError = "Error in onLoad for " + metaData.getName() + ':' + e.getMessage();
- LOG.warn(APP_ERROR, lastError, e);
- unloadPlugin();
- }
- }
-
- /**
- * Gets the configuration domain that should be used by this plugin.
- *
- * @return The configuration domain to use.
- */
- public String getDomain() {
- return "plugin-" + metaData.getName();
- }
-
- /**
- * Unload the plugin if possible.
- */
- public void unloadPlugin() {
- unloadPlugin(false);
- }
-
- /**
- * Can this plugin be unloaded? Will return false if: - The plugin is persistent (all its
- * classes are loaded into the global class loader) - The plugin isn't currently loaded - The
- * metadata key "unloadable" is set to false, no or 0
- *
- * @return true if plugin can be unloaded
- */
- public boolean isUnloadable() {
- return !isPersistent() && isLoaded() && metaData.isUnloadable();
- }
-
- /**
- * Unload the plugin if possible.
- *
- * @param parentUnloading is our parent already unloading? (if so, don't call delChild)
- */
- private void unloadPlugin(final boolean parentUnloading) {
- if (isUnloadable()) {
- // Unload all children
- for (PluginInfo child : children) {
- child.unloadPlugin(true);
- }
-
- // Delete ourself as a child of our parent.
- if (!parentUnloading && metaData.getParent() != null) {
- final PluginInfo pi = pluginManager.getPluginInfoByName(metaData.getParent());
- if (pi != null) {
- pi.delChild(this);
- }
- }
-
- // Now unload ourself
- try {
- plugin.onUnload();
- } catch (Exception | LinkageError e) {
- lastError = "Error in onUnload for " + metaData.getName()
- + ':' + e + " - " + e.getMessage();
- LOG.warn(APP_ERROR, lastError, e);
- }
-
- //TODO plugin unloading shouldn't be done from here, event bus shouldn't be here.
- eventBus.publishAsync(new PluginUnloadedEvent(this));
- synchronized (provides) {
- for (Service service : provides) {
- service.delProvider(this);
- }
- provides.clear();
- }
- }
- unloadIdentities();
- plugin = null;
- pluginClassLoader = null;
- }
-
- /**
- * Get the list of Classes
- *
- * @return Classes this plugin has
- */
- public List<String> getClassList() {
- return Collections.unmodifiableList(myClasses);
- }
-
- /**
- * Is this a persistent plugin?
- *
- * @return true if persistent, else false
- */
- public boolean isPersistent() {
- return metaData.getPersistentClasses().contains("*");
- }
-
- /**
- * Get a list of all persistent classes in this plugin
- *
- * @return List of all persistent classes in this plugin
- */
- public Collection<String> getPersistentClasses() {
- if (isPersistent()) {
- return getClassList();
- } else {
- return metaData.getPersistentClasses();
- }
- }
-
- /**
- * Is this a persistent class?
- *
- * @param classname class to check persistence of
- *
- * @return true if file (or whole plugin) is persistent, else false
- */
- public boolean isPersistent(final String classname) {
- return isPersistent() || metaData.getPersistentClasses().contains(classname);
- }
-
- /**
- * String Representation of this plugin
- *
- * @return String Representation of this plugin
- */
- @Override
- public String toString() {
- return metaData.getFriendlyName() + " - " + filename;
- }
-
- /**
- * Update exports list.
- */
- private void updateExports() {
- exports.clear();
-
- // Get exports provided by this plugin
- final Collection<String> exportsList = metaData.getExports();
- for (String item : exportsList) {
- final String[] bits = item.split(" ");
- if (bits.length > 2) {
- final String methodName = bits[0];
- final String methodClass = bits[2];
- final String serviceName = bits.length > 4 ? bits[4] : bits[0];
-
- // Add a provides for this
- final Service service = serviceManager.getService("export", serviceName, true);
- synchronized (provides) {
- service.addProvider(this);
- provides.add(service);
- }
- // Add is as an export
- exports.put(serviceName, new ExportInfo(methodName, methodClass, this));
- }
- }
- }
-
- @Override
- public ExportedService getExportedService(final String name) {
- if (exports.containsKey(name)) {
- return exports.get(name).getExportedService();
- } else {
- return null;
- }
- }
-
- /**
- * Does this plugin export the specified service?
- *
- * @param name Name of the service to check
- *
- * @return true iff the plugin exports the service
- */
- public boolean hasExportedService(final String name) {
- return exports.containsKey(name);
- }
-
- }
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