From: James Moger Date: Fri, 4 Apr 2014 23:57:03 +0000 (-0400) Subject: Implement loading a single plugin archive X-Git-Tag: release-0.7.0~4^2 X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=refs%2Fpull%2F6%2Fhead;p=pf4j.git Implement loading a single plugin archive --- diff --git a/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultExtensionFinder.java b/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultExtensionFinder.java index 86f11fc..99f7eca 100644 --- a/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultExtensionFinder.java +++ b/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultExtensionFinder.java @@ -1,11 +1,11 @@ /* * Copyright 2013 Decebal Suiu - * + * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with * the License. You may obtain a copy of the License in the LICENSE file, or at: - * + * * http://www.apache.org/licenses/LICENSE-2.0 - * + * * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. @@ -29,23 +29,28 @@ import org.slf4j.LoggerFactory; /** * The default implementation for ExtensionFinder. * All extensions declared in a plugin are indexed in a file "META-INF/extensions.idx". - * This class lookup extensions in all extensions index files "META-INF/extensions.idx". - * + * This class lookup extensions in all extensions index files "META-INF/extensions.idx". + * * @author Decebal Suiu */ public class DefaultExtensionFinder implements ExtensionFinder { private static final Logger log = LoggerFactory.getLogger(DefaultExtensionFinder.class); - + private ClassLoader classLoader; private ExtensionFactory extensionFactory; private volatile Set entries; - + public DefaultExtensionFinder(ClassLoader classLoader) { this.classLoader = classLoader; this.extensionFactory = createExtensionFactory(); } - + + @Override + public void reset() { + entries = null; + } + @Override public List> find(Class type) { log.debug("Checking extension point '{}'", type.getName()); @@ -60,7 +65,7 @@ public class DefaultExtensionFinder implements ExtensionFinder { if (entries == null) { entries = readIndexFiles(); } - + for (String entry : entries) { try { Class extensionType = classLoader.loadClass(entry); @@ -76,10 +81,10 @@ public class DefaultExtensionFinder implements ExtensionFinder { log.warn("'{}' is not an extension for extension point '{}'", extensionType.getName(), type.getName()); } } catch (ClassNotFoundException e) { - log.error(e.getMessage(), e); + log.error(e.getMessage(), e); } } - + if (entries.isEmpty()) { log.debug("No extensions found for extension point '{}'", type.getName()); } else { @@ -88,21 +93,21 @@ public class DefaultExtensionFinder implements ExtensionFinder { // sort by "ordinal" property Collections.sort(result); - + return result; } - + /** * Add the possibility to override the ExtensionFactory. * The default implementation uses Class.newInstance() method. */ protected ExtensionFactory createExtensionFactory() { return new ExtensionFactory() { - + @Override public Object create(Class extensionType) { log.debug("Create instance for extension '{}'", extensionType.getName()); - + try { return extensionType.newInstance(); } catch (InstantiationException e) { @@ -110,17 +115,17 @@ public class DefaultExtensionFinder implements ExtensionFinder { } catch (IllegalAccessException e) { log.error(e.getMessage(), e); } - + return null; } - + }; } - + private Set readIndexFiles() { log.debug("Reading extensions index files"); Set entries = new HashSet(); - + try { Enumeration indexFiles = classLoader.getResources(ExtensionsIndexer.EXTENSIONS_RESOURCE); while (indexFiles.hasMoreElements()) { @@ -129,7 +134,7 @@ public class DefaultExtensionFinder implements ExtensionFinder { } } catch (IOException e) { log.error(e.getMessage(), e); - } + } if (entries.isEmpty()) { log.debug("No extensions found"); @@ -143,14 +148,14 @@ public class DefaultExtensionFinder implements ExtensionFinder { private boolean isExtensionPoint(Class type) { return ExtensionPoint.class.isAssignableFrom(type); } - + /** * Creates an extension instance. */ public static interface ExtensionFactory { public Object create(Class extensionType); - + } } diff --git a/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultPluginManager.java b/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultPluginManager.java index 7254206..557bb77 100644 --- a/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultPluginManager.java +++ b/pf4j/src/main/java/ro/fortsoft/pf4j/DefaultPluginManager.java @@ -1,609 +1,649 @@ -/* - * Copyright 2012 Decebal Suiu - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with - * the License. You may obtain a copy of the License in the LICENSE file, or at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on - * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the - * specific language governing permissions and limitations under the License. - */ -package ro.fortsoft.pf4j; - -import java.io.File; -import java.io.FileFilter; -import java.io.IOException; -import java.util.ArrayList; -import java.util.Collections; -import java.util.HashMap; -import java.util.Iterator; -import java.util.List; -import java.util.Map; - -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -import ro.fortsoft.pf4j.util.AndFileFilter; -import ro.fortsoft.pf4j.util.CompoundClassLoader; -import ro.fortsoft.pf4j.util.DirectoryFileFilter; -import ro.fortsoft.pf4j.util.FileUtils; -import ro.fortsoft.pf4j.util.HiddenFilter; -import ro.fortsoft.pf4j.util.NotFileFilter; -import ro.fortsoft.pf4j.util.Unzip; -import ro.fortsoft.pf4j.util.ZipFileFilter; - -/** - * Default implementation of the PluginManager interface. - * - * @author Decebal Suiu - */ -public class DefaultPluginManager implements PluginManager { - - private static final Logger log = LoggerFactory.getLogger(DefaultPluginManager.class); - - public static final String DEFAULT_PLUGINS_DIRECTORY = "plugins"; - public static final String DEVELOPMENT_PLUGINS_DIRECTORY = "../plugins"; - - /** - * The plugins repository. - */ - private File pluginsDirectory; - - private ExtensionFinder extensionFinder; - - private PluginDescriptorFinder pluginDescriptorFinder; - - private PluginClasspath pluginClasspath; - - /** - * A map of plugins this manager is responsible for (the key is the 'pluginId'). - */ - private Map plugins; - - /** - * A map of plugin class loaders (he key is the 'pluginId'). - */ - private Map pluginClassLoaders; - - /** - * A relation between 'pluginPath' and 'pluginId' - */ - private Map pathToIdMap; - - /** - * A list with unresolved plugins (unresolved dependency). - */ - private List unresolvedPlugins; - - /** - * A list with resolved plugins (resolved dependency). - */ - private List resolvedPlugins; - - /** - * A list with started plugins. - */ - private List startedPlugins; - - private List enabledPlugins; - private List disabledPlugins; - - /** - * A compound class loader of resolved plugins. - */ - protected CompoundClassLoader compoundClassLoader; - - /** - * Cache value for the runtime mode. No need to re-read it because it wont change at - * runtime. - */ - private RuntimeMode runtimeMode; - - /** - * The plugins directory is supplied by System.getProperty("pf4j.pluginsDir", "plugins"). - */ - public DefaultPluginManager() { - this.pluginsDirectory = createPluginsDirectory(); - - initialize(); - } - - /** - * Constructs DefaultPluginManager which the given plugins directory. - * - * @param pluginsDirectory - * the directory to search for plugins - */ - public DefaultPluginManager(File pluginsDirectory) { - this.pluginsDirectory = pluginsDirectory; - - initialize(); - } - - @Override - public List getPlugins() { - return new ArrayList(plugins.values()); - } - - @Override - public List getResolvedPlugins() { - return resolvedPlugins; - } - - public PluginWrapper getPlugin(String pluginId) { - return plugins.get(pluginId); - } - - @Override - public List getUnresolvedPlugins() { - return unresolvedPlugins; - } - - @Override - public List getStartedPlugins() { - return startedPlugins; - } - - /** - * Start all active plugins. - */ - @Override - public void startPlugins() { - for (PluginWrapper pluginWrapper : resolvedPlugins) { - try { - log.info("Start plugin '{}'", pluginWrapper.getDescriptor().getPluginId()); - pluginWrapper.getPlugin().start(); - pluginWrapper.setPluginState(PluginState.STARTED); - startedPlugins.add(pluginWrapper); - } catch (PluginException e) { - log.error(e.getMessage(), e); - } - } - } - - /** - * Start the specified plugin and it's dependencies. - */ - @Override - public PluginState startPlugin(String pluginId) { - if (!plugins.containsKey(pluginId)) { - throw new IllegalArgumentException(String.format("Unknown pluginId %s", pluginId)); - } - PluginWrapper pluginWrapper = plugins.get(pluginId); - PluginDescriptor pluginDescriptor = pluginWrapper.getDescriptor(); - if (pluginWrapper.getPluginState().equals(PluginState.STARTED)) { - log.debug("Already started plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); - return PluginState.STARTED; - } - for (PluginDependency dependency : pluginDescriptor.getDependencies()) { - startPlugin(dependency.getPluginId()); - } - try { - log.info("Start plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); - pluginWrapper.getPlugin().start(); - pluginWrapper.setPluginState(PluginState.STARTED); - startedPlugins.add(pluginWrapper); - } catch (PluginException e) { - log.error(e.getMessage(), e); - } - return pluginWrapper.getPluginState(); - } - - /** - * Stop all active plugins. - */ - @Override - public void stopPlugins() { - // stop started plugins in reverse order - Collections.reverse(startedPlugins); - Iterator itr = startedPlugins.iterator(); - while (itr.hasNext()) { - PluginWrapper pluginWrapper = itr.next(); - PluginDescriptor pluginDescriptor = pluginWrapper.getDescriptor(); - try { - log.info("Stop plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); - pluginWrapper.getPlugin().stop(); - pluginWrapper.setPluginState(PluginState.STOPPED); - itr.remove(); - } catch (PluginException e) { - log.error(e.getMessage(), e); - } - } - } - - /** - * Stop the specified plugin and it's dependencies. - */ - @Override - public PluginState stopPlugin(String pluginId) { - if (!plugins.containsKey(pluginId)) { - throw new IllegalArgumentException(String.format("Unknown pluginId %s", pluginId)); - } - PluginWrapper pluginWrapper = plugins.get(pluginId); - PluginDescriptor pluginDescriptor = pluginWrapper.getDescriptor(); - if (pluginWrapper.getPluginState().equals(PluginState.STOPPED)) { - log.debug("Already stopped plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); - return PluginState.STOPPED; - } - for (PluginDependency dependency : pluginDescriptor.getDependencies()) { - stopPlugin(dependency.getPluginId()); - } - try { - log.info("Stop plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); - pluginWrapper.getPlugin().stop(); - pluginWrapper.setPluginState(PluginState.STOPPED); - startedPlugins.remove(pluginWrapper); - } catch (PluginException e) { - log.error(e.getMessage(), e); - } - return pluginWrapper.getPluginState(); - } - - /** - * Load plugins. - */ - @Override - public void loadPlugins() { - log.debug("Lookup plugins in '{}'", pluginsDirectory.getAbsolutePath()); - // check for plugins directory - if (!pluginsDirectory.exists() || !pluginsDirectory.isDirectory()) { - log.error("No '{}' directory", pluginsDirectory.getAbsolutePath()); - return; - } - - // expand all plugin archives - FileFilter zipFilter = new ZipFileFilter(); - File[] zipFiles = pluginsDirectory.listFiles(zipFilter); - if (zipFiles != null) { - for (File zipFile : zipFiles) { - try { - expandPluginArchive(zipFile); - } catch (IOException e) { - log.error(e.getMessage(), e); - } - } - } - - // check for no plugins - List filterList = new ArrayList(); - filterList.add(new DirectoryFileFilter()); - filterList.add(new NotFileFilter(createHiddenPluginFilter())); - FileFilter pluginsFilter = new AndFileFilter(filterList); - File[] directories = pluginsDirectory.listFiles(pluginsFilter); - if (directories == null) { - directories = new File[0]; - } - log.debug("Found possible {} plugins: {}", directories.length, directories); - if (directories.length == 0) { - log.info("No plugins"); - return; - } - - // load any plugin from plugins directory - for (File directory : directories) { - try { - loadPlugin(directory); - } catch (PluginException e) { - log.error(e.getMessage(), e); - } - } - - // resolve 'unresolvedPlugins' - try { - resolvePlugins(); - } catch (PluginException e) { - log.error(e.getMessage(), e); - } - } - - @Override - public boolean unloadPlugin(String pluginId) { - try { - PluginState state = stopPlugin(pluginId); - if (!PluginState.STOPPED.equals(state)) { - return false; - } - - PluginWrapper pluginWrapper = plugins.get(pluginId); - PluginDescriptor descriptor = pluginWrapper.getDescriptor(); - List dependencies = descriptor.getDependencies(); - for (PluginDependency dependency : dependencies) { - if (!unloadPlugin(dependency.getPluginId())) { - return false; - } - } - - // remove the plugin - plugins.remove(pluginId); - resolvedPlugins.remove(pluginWrapper); - pathToIdMap.remove(pluginWrapper.getPluginPath()); - - // remove the classloader - if (pluginClassLoaders.containsKey(pluginId)) { - PluginClassLoader classLoader = pluginClassLoaders.remove(pluginId); - compoundClassLoader.removeLoader(classLoader); - try { - classLoader.close(); - } catch (IOException e) { - log.error(e.getMessage(), e); - } - } - return true; - } catch (IllegalArgumentException e) { - // ignore not found exceptions because this method is recursive - } - return false; - } - - @Override - public boolean deletePlugin(String pluginId) { - if (!plugins.containsKey(pluginId)) { - throw new IllegalArgumentException(String.format("Unknown pluginId %s", pluginId)); - } - PluginWrapper pw = getPlugin(pluginId); - PluginState state = stopPlugin(pluginId); - - if (PluginState.STOPPED != state) { - log.error("Failed to stop plugin {} on delete", pluginId); - return false; - } - - if (!unloadPlugin(pluginId)) { - log.error("Failed to unload plugin {} on delete", pluginId); - return false; - } - - File pluginFolder = new File(pluginsDirectory, pw.getPluginPath()); - File pluginZip = null; - - FileFilter zipFilter = new ZipFileFilter(); - File[] zipFiles = pluginsDirectory.listFiles(zipFilter); - if (zipFiles != null) { - // strip prepended / from the plugin path - String dirName = pw.getPluginPath().substring(1); - // find the zip file that matches the plugin path - for (File zipFile : zipFiles) { - String name = zipFile.getName().substring(0, zipFile.getName().lastIndexOf('.')); - if (name.equals(dirName)) { - pluginZip = zipFile; - break; - } - } - } - - if (pluginFolder.exists()) { - FileUtils.delete(pluginFolder); - } - if (pluginZip != null && pluginZip.exists()) { - FileUtils.delete(pluginZip); - } - return true; - } - - /** - * Get plugin class loader for this path. - */ - @Override - public PluginClassLoader getPluginClassLoader(String pluginId) { - return pluginClassLoaders.get(pluginId); - } - - @Override - public List getExtensions(Class type) { - List> extensionsWrapper = extensionFinder.find(type); - List extensions = new ArrayList(extensionsWrapper.size()); - for (ExtensionWrapper extensionWrapper : extensionsWrapper) { - extensions.add(extensionWrapper.getInstance()); - } - - return extensions; - } - - @Override - public RuntimeMode getRuntimeMode() { - if (runtimeMode == null) { - // retrieves the runtime mode from system - String modeAsString = System.getProperty("pf4j.mode", RuntimeMode.DEPLOYMENT.toString()); - runtimeMode = RuntimeMode.byName(modeAsString); - - log.info("PF4J runtime mode is '{}'", runtimeMode); - - } - - return runtimeMode; - } - - /** - * Retrieves the {@link PluginWrapper} that loaded the given class 'clazz'. - */ - public PluginWrapper whichPlugin(Class clazz) { - ClassLoader classLoader = clazz.getClassLoader(); - for (PluginWrapper plugin : resolvedPlugins) { - if (plugin.getPluginClassLoader() == classLoader) { - return plugin; - } - } - - return null; - } - - /** - * Add the possibility to override the PluginDescriptorFinder. - * By default if getRuntimeMode() returns RuntimeMode.DEVELOPMENT than a - * PropertiesPluginDescriptorFinder is returned else this method returns - * DefaultPluginDescriptorFinder. - */ - protected PluginDescriptorFinder createPluginDescriptorFinder() { - if (RuntimeMode.DEVELOPMENT.equals(getRuntimeMode())) { - return new PropertiesPluginDescriptorFinder(); - } - - return new DefaultPluginDescriptorFinder(pluginClasspath); - } - - /** - * Add the possibility to override the ExtensionFinder. - */ - protected ExtensionFinder createExtensionFinder() { - return new DefaultExtensionFinder(compoundClassLoader); - } - - /** - * Add the possibility to override the PluginClassPath. - * By default if getRuntimeMode() returns RuntimeMode.DEVELOPMENT than a - * DevelopmentPluginClasspath is returned else this method returns - * PluginClasspath. - */ - protected PluginClasspath createPluginClasspath() { - if (RuntimeMode.DEVELOPMENT.equals(getRuntimeMode())) { - return new DevelopmentPluginClasspath(); - } - - return new PluginClasspath(); - } - - protected boolean isPluginDisabled(String pluginId) { - if (enabledPlugins.isEmpty()) { - return disabledPlugins.contains(pluginId); - } - - return !enabledPlugins.contains(pluginId); - } - - protected FileFilter createHiddenPluginFilter() { - return new HiddenFilter(); - } - - /** - * Add the possibility to override the plugins directory. - * If a "pf4j.pluginsDir" system property is defined than this method returns - * that directory. - * If getRuntimeMode() returns RuntimeMode.DEVELOPMENT than a - * DEVELOPMENT_PLUGINS_DIRECTORY ("../plugins") is returned else this method returns - * DEFAULT_PLUGINS_DIRECTORY ("plugins"). - * @return - */ - protected File createPluginsDirectory() { - String pluginsDir = System.getProperty("pf4j.pluginsDir"); - if (pluginsDir == null) { - if (RuntimeMode.DEVELOPMENT.equals(getRuntimeMode())) { - pluginsDir = DEVELOPMENT_PLUGINS_DIRECTORY; - } else { - pluginsDir = DEFAULT_PLUGINS_DIRECTORY; - } - } - - return new File(pluginsDir); - } - - private void initialize() { - plugins = new HashMap(); - pluginClassLoaders = new HashMap(); - pathToIdMap = new HashMap(); - unresolvedPlugins = new ArrayList(); - resolvedPlugins = new ArrayList(); - startedPlugins = new ArrayList(); - disabledPlugins = new ArrayList(); - compoundClassLoader = new CompoundClassLoader(); - - pluginClasspath = createPluginClasspath(); - pluginDescriptorFinder = createPluginDescriptorFinder(); - extensionFinder = createExtensionFinder(); - - try { - // create a list with plugin identifiers that should be only accepted by this manager (whitelist from plugins/enabled.txt file) - enabledPlugins = FileUtils.readLines(new File(pluginsDirectory, "enabled.txt"), true); - log.info("Enabled plugins: {}", enabledPlugins); - - // create a list with plugin identifiers that should not be accepted by this manager (blacklist from plugins/disabled.txt file) - disabledPlugins = FileUtils.readLines(new File(pluginsDirectory, "disabled.txt"), true); - log.info("Disabled plugins: {}", disabledPlugins); - } catch (IOException e) { - log.error(e.getMessage(), e); - } - - System.setProperty("pf4j.pluginsDir", pluginsDirectory.getAbsolutePath()); - } - - private void loadPlugin(File pluginDirectory) throws PluginException { - // try to load the plugin - String pluginName = pluginDirectory.getName(); - String pluginPath = "/".concat(pluginName); - - // test for plugin duplication - if (plugins.get(pathToIdMap.get(pluginPath)) != null) { - return; - } - - // retrieves the plugin descriptor - log.debug("Find plugin descriptor '{}'", pluginPath); - PluginDescriptor pluginDescriptor = pluginDescriptorFinder.find(pluginDirectory); - log.debug("Descriptor " + pluginDescriptor); - String pluginClassName = pluginDescriptor.getPluginClass(); - log.debug("Class '{}' for plugin '{}'", pluginClassName, pluginPath); - - // test for disabled plugin - if (isPluginDisabled(pluginDescriptor.getPluginId())) { - log.info("Plugin '{}' is disabled", pluginPath); - return; - } - - // load plugin - log.debug("Loading plugin '{}'", pluginPath); - PluginLoader pluginLoader = new PluginLoader(this, pluginDescriptor, pluginDirectory, pluginClasspath); - pluginLoader.load(); - log.debug("Loaded plugin '{}'", pluginPath); - - // create the plugin wrapper - log.debug("Creating wrapper for plugin '{}'", pluginPath); - PluginWrapper pluginWrapper = new PluginWrapper(pluginDescriptor, pluginPath, pluginLoader.getPluginClassLoader()); - pluginWrapper.setRuntimeMode(getRuntimeMode()); - log.debug("Created wrapper '{}' for plugin '{}'", pluginWrapper, pluginPath); - - String pluginId = pluginDescriptor.getPluginId(); - - // add plugin to the list with plugins - plugins.put(pluginId, pluginWrapper); - unresolvedPlugins.add(pluginWrapper); - - // add plugin class loader to the list with class loaders - PluginClassLoader pluginClassLoader = pluginLoader.getPluginClassLoader(); - pluginClassLoaders.put(pluginId, pluginClassLoader); - } - - private void expandPluginArchive(File pluginArchiveFile) throws IOException { - String fileName = pluginArchiveFile.getName(); - long pluginArchiveDate = pluginArchiveFile.lastModified(); - String pluginName = fileName.substring(0, fileName.length() - 4); - File pluginDirectory = new File(pluginsDirectory, pluginName); - // check if exists directory or the '.zip' file is "newer" than directory - if (!pluginDirectory.exists() || (pluginArchiveDate > pluginDirectory.lastModified())) { - log.debug("Expand plugin archive '{}' in '{}'", pluginArchiveFile, pluginDirectory); - // create directory for plugin - pluginDirectory.mkdirs(); - - // expand '.zip' file - Unzip unzip = new Unzip(); - unzip.setSource(pluginArchiveFile); - unzip.setDestination(pluginDirectory); - unzip.extract(); - } - } - - private void resolvePlugins() throws PluginException { - resolveDependencies(); - } - - private void resolveDependencies() throws PluginException { - DependencyResolver dependencyResolver = new DependencyResolver(unresolvedPlugins); - resolvedPlugins = dependencyResolver.getSortedPlugins(); - for (PluginWrapper pluginWrapper : resolvedPlugins) { - unresolvedPlugins.remove(pluginWrapper); - compoundClassLoader.addLoader(pluginWrapper.getPluginClassLoader()); - log.info("Plugin '{}' resolved", pluginWrapper.getDescriptor().getPluginId()); - } - } - -} +/* + * Copyright 2012 Decebal Suiu + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with + * the License. You may obtain a copy of the License in the LICENSE file, or at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on + * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the + * specific language governing permissions and limitations under the License. + */ +package ro.fortsoft.pf4j; + +import java.io.File; +import java.io.FileFilter; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import ro.fortsoft.pf4j.util.AndFileFilter; +import ro.fortsoft.pf4j.util.CompoundClassLoader; +import ro.fortsoft.pf4j.util.DirectoryFileFilter; +import ro.fortsoft.pf4j.util.FileUtils; +import ro.fortsoft.pf4j.util.HiddenFilter; +import ro.fortsoft.pf4j.util.NotFileFilter; +import ro.fortsoft.pf4j.util.Unzip; +import ro.fortsoft.pf4j.util.ZipFileFilter; + +/** + * Default implementation of the PluginManager interface. + * + * @author Decebal Suiu + */ +public class DefaultPluginManager implements PluginManager { + + private static final Logger log = LoggerFactory.getLogger(DefaultPluginManager.class); + + public static final String DEFAULT_PLUGINS_DIRECTORY = "plugins"; + public static final String DEVELOPMENT_PLUGINS_DIRECTORY = "../plugins"; + + /** + * The plugins repository. + */ + private File pluginsDirectory; + + private ExtensionFinder extensionFinder; + + private PluginDescriptorFinder pluginDescriptorFinder; + + private PluginClasspath pluginClasspath; + + /** + * A map of plugins this manager is responsible for (the key is the 'pluginId'). + */ + private Map plugins; + + /** + * A map of plugin class loaders (he key is the 'pluginId'). + */ + private Map pluginClassLoaders; + + /** + * A relation between 'pluginPath' and 'pluginId' + */ + private Map pathToIdMap; + + /** + * A list with unresolved plugins (unresolved dependency). + */ + private List unresolvedPlugins; + + /** + * A list with resolved plugins (resolved dependency). + */ + private List resolvedPlugins; + + /** + * A list with started plugins. + */ + private List startedPlugins; + + private List enabledPlugins; + private List disabledPlugins; + + /** + * A compound class loader of resolved plugins. + */ + protected CompoundClassLoader compoundClassLoader; + + /** + * Cache value for the runtime mode. No need to re-read it because it wont change at + * runtime. + */ + private RuntimeMode runtimeMode; + + /** + * The plugins directory is supplied by System.getProperty("pf4j.pluginsDir", "plugins"). + */ + public DefaultPluginManager() { + this.pluginsDirectory = createPluginsDirectory(); + + initialize(); + } + + /** + * Constructs DefaultPluginManager which the given plugins directory. + * + * @param pluginsDirectory + * the directory to search for plugins + */ + public DefaultPluginManager(File pluginsDirectory) { + this.pluginsDirectory = pluginsDirectory; + + initialize(); + } + + @Override + public List getPlugins() { + return new ArrayList(plugins.values()); + } + + @Override + public List getResolvedPlugins() { + return resolvedPlugins; + } + + public PluginWrapper getPlugin(String pluginId) { + return plugins.get(pluginId); + } + + @Override + public List getUnresolvedPlugins() { + return unresolvedPlugins; + } + + @Override + public List getStartedPlugins() { + return startedPlugins; + } + + @Override + public String loadPlugin(File pluginArchiveFile) { + if (pluginArchiveFile == null || !pluginArchiveFile.exists()) { + throw new IllegalArgumentException(String.format("Specified plugin %s does not exist!", pluginArchiveFile)); + } + + File pluginDirectory = null; + try { + pluginDirectory = expandPluginArchive(pluginArchiveFile); + } catch (IOException e) { + log.error(e.getMessage(), e); + } + if (pluginDirectory == null || !pluginDirectory.exists()) { + throw new IllegalArgumentException(String.format("Failed to expand %s", pluginArchiveFile)); + } + + try { + PluginWrapper pluginWrapper = loadPluginDirectory(pluginDirectory); + // TODO uninstalled plugin dependencies? + unresolvedPlugins.remove(pluginWrapper); + resolvedPlugins.add(pluginWrapper); + compoundClassLoader.addLoader(pluginWrapper.getPluginClassLoader()); + extensionFinder.reset(); + return pluginWrapper.getDescriptor().getPluginId(); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + return null; + } + + /** + * Start all active plugins. + */ + @Override + public void startPlugins() { + for (PluginWrapper pluginWrapper : resolvedPlugins) { + try { + log.info("Start plugin '{}'", pluginWrapper.getDescriptor().getPluginId()); + pluginWrapper.getPlugin().start(); + pluginWrapper.setPluginState(PluginState.STARTED); + startedPlugins.add(pluginWrapper); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + } + } + + /** + * Start the specified plugin and it's dependencies. + */ + @Override + public PluginState startPlugin(String pluginId) { + if (!plugins.containsKey(pluginId)) { + throw new IllegalArgumentException(String.format("Unknown pluginId %s", pluginId)); + } + PluginWrapper pluginWrapper = plugins.get(pluginId); + PluginDescriptor pluginDescriptor = pluginWrapper.getDescriptor(); + if (pluginWrapper.getPluginState().equals(PluginState.STARTED)) { + log.debug("Already started plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); + return PluginState.STARTED; + } + for (PluginDependency dependency : pluginDescriptor.getDependencies()) { + startPlugin(dependency.getPluginId()); + } + try { + log.info("Start plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); + pluginWrapper.getPlugin().start(); + pluginWrapper.setPluginState(PluginState.STARTED); + startedPlugins.add(pluginWrapper); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + return pluginWrapper.getPluginState(); + } + + /** + * Stop all active plugins. + */ + @Override + public void stopPlugins() { + // stop started plugins in reverse order + Collections.reverse(startedPlugins); + Iterator itr = startedPlugins.iterator(); + while (itr.hasNext()) { + PluginWrapper pluginWrapper = itr.next(); + PluginDescriptor pluginDescriptor = pluginWrapper.getDescriptor(); + try { + log.info("Stop plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); + pluginWrapper.getPlugin().stop(); + pluginWrapper.setPluginState(PluginState.STOPPED); + itr.remove(); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + } + } + + /** + * Stop the specified plugin and it's dependencies. + */ + @Override + public PluginState stopPlugin(String pluginId) { + if (!plugins.containsKey(pluginId)) { + throw new IllegalArgumentException(String.format("Unknown pluginId %s", pluginId)); + } + PluginWrapper pluginWrapper = plugins.get(pluginId); + PluginDescriptor pluginDescriptor = pluginWrapper.getDescriptor(); + if (pluginWrapper.getPluginState().equals(PluginState.STOPPED)) { + log.debug("Already stopped plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); + return PluginState.STOPPED; + } + for (PluginDependency dependency : pluginDescriptor.getDependencies()) { + stopPlugin(dependency.getPluginId()); + } + try { + log.info("Stop plugin '{}:{}'", pluginDescriptor.getPluginId(), pluginDescriptor.getVersion()); + pluginWrapper.getPlugin().stop(); + pluginWrapper.setPluginState(PluginState.STOPPED); + startedPlugins.remove(pluginWrapper); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + return pluginWrapper.getPluginState(); + } + + /** + * Load plugins. + */ + @Override + public void loadPlugins() { + log.debug("Lookup plugins in '{}'", pluginsDirectory.getAbsolutePath()); + // check for plugins directory + if (!pluginsDirectory.exists() || !pluginsDirectory.isDirectory()) { + log.error("No '{}' directory", pluginsDirectory.getAbsolutePath()); + return; + } + + // expand all plugin archives + FileFilter zipFilter = new ZipFileFilter(); + File[] zipFiles = pluginsDirectory.listFiles(zipFilter); + if (zipFiles != null) { + for (File zipFile : zipFiles) { + try { + expandPluginArchive(zipFile); + } catch (IOException e) { + log.error(e.getMessage(), e); + } + } + } + + // check for no plugins + List filterList = new ArrayList(); + filterList.add(new DirectoryFileFilter()); + filterList.add(new NotFileFilter(createHiddenPluginFilter())); + FileFilter pluginsFilter = new AndFileFilter(filterList); + File[] directories = pluginsDirectory.listFiles(pluginsFilter); + if (directories == null) { + directories = new File[0]; + } + log.debug("Found possible {} plugins: {}", directories.length, directories); + if (directories.length == 0) { + log.info("No plugins"); + return; + } + + // load any plugin from plugins directory + for (File directory : directories) { + try { + loadPluginDirectory(directory); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + } + + // resolve 'unresolvedPlugins' + try { + resolvePlugins(); + } catch (PluginException e) { + log.error(e.getMessage(), e); + } + } + + @Override + public boolean unloadPlugin(String pluginId) { + try { + PluginState state = stopPlugin(pluginId); + if (!PluginState.STOPPED.equals(state)) { + return false; + } + + PluginWrapper pluginWrapper = plugins.get(pluginId); + PluginDescriptor descriptor = pluginWrapper.getDescriptor(); + List dependencies = descriptor.getDependencies(); + for (PluginDependency dependency : dependencies) { + if (!unloadPlugin(dependency.getPluginId())) { + return false; + } + } + + // remove the plugin + plugins.remove(pluginId); + resolvedPlugins.remove(pluginWrapper); + pathToIdMap.remove(pluginWrapper.getPluginPath()); + extensionFinder.reset(); + + // remove the classloader + if (pluginClassLoaders.containsKey(pluginId)) { + PluginClassLoader classLoader = pluginClassLoaders.remove(pluginId); + compoundClassLoader.removeLoader(classLoader); + try { + classLoader.close(); + } catch (IOException e) { + log.error(e.getMessage(), e); + } + } + return true; + } catch (IllegalArgumentException e) { + // ignore not found exceptions because this method is recursive + } + return false; + } + + @Override + public boolean deletePlugin(String pluginId) { + if (!plugins.containsKey(pluginId)) { + throw new IllegalArgumentException(String.format("Unknown pluginId %s", pluginId)); + } + PluginWrapper pw = getPlugin(pluginId); + PluginState state = stopPlugin(pluginId); + + if (PluginState.STOPPED != state) { + log.error("Failed to stop plugin {} on delete", pluginId); + return false; + } + + if (!unloadPlugin(pluginId)) { + log.error("Failed to unload plugin {} on delete", pluginId); + return false; + } + + File pluginFolder = new File(pluginsDirectory, pw.getPluginPath()); + File pluginZip = null; + + FileFilter zipFilter = new ZipFileFilter(); + File[] zipFiles = pluginsDirectory.listFiles(zipFilter); + if (zipFiles != null) { + // strip prepended / from the plugin path + String dirName = pw.getPluginPath().substring(1); + // find the zip file that matches the plugin path + for (File zipFile : zipFiles) { + String name = zipFile.getName().substring(0, zipFile.getName().lastIndexOf('.')); + if (name.equals(dirName)) { + pluginZip = zipFile; + break; + } + } + } + + if (pluginFolder.exists()) { + FileUtils.delete(pluginFolder); + } + if (pluginZip != null && pluginZip.exists()) { + FileUtils.delete(pluginZip); + } + return true; + } + + /** + * Get plugin class loader for this path. + */ + @Override + public PluginClassLoader getPluginClassLoader(String pluginId) { + return pluginClassLoaders.get(pluginId); + } + + @Override + public List getExtensions(Class type) { + List> extensionsWrapper = extensionFinder.find(type); + List extensions = new ArrayList(extensionsWrapper.size()); + for (ExtensionWrapper extensionWrapper : extensionsWrapper) { + extensions.add(extensionWrapper.getInstance()); + } + + return extensions; + } + + @Override + public RuntimeMode getRuntimeMode() { + if (runtimeMode == null) { + // retrieves the runtime mode from system + String modeAsString = System.getProperty("pf4j.mode", RuntimeMode.DEPLOYMENT.toString()); + runtimeMode = RuntimeMode.byName(modeAsString); + + log.info("PF4J runtime mode is '{}'", runtimeMode); + + } + + return runtimeMode; + } + + /** + * Retrieves the {@link PluginWrapper} that loaded the given class 'clazz'. + */ + public PluginWrapper whichPlugin(Class clazz) { + ClassLoader classLoader = clazz.getClassLoader(); + for (PluginWrapper plugin : resolvedPlugins) { + if (plugin.getPluginClassLoader() == classLoader) { + return plugin; + } + } + log.warn("Failed to find the plugin for {}", clazz); + return null; + } + + /** + * Add the possibility to override the PluginDescriptorFinder. + * By default if getRuntimeMode() returns RuntimeMode.DEVELOPMENT than a + * PropertiesPluginDescriptorFinder is returned else this method returns + * DefaultPluginDescriptorFinder. + */ + protected PluginDescriptorFinder createPluginDescriptorFinder() { + if (RuntimeMode.DEVELOPMENT.equals(getRuntimeMode())) { + return new PropertiesPluginDescriptorFinder(); + } + + return new DefaultPluginDescriptorFinder(pluginClasspath); + } + + /** + * Add the possibility to override the ExtensionFinder. + */ + protected ExtensionFinder createExtensionFinder() { + return new DefaultExtensionFinder(compoundClassLoader); + } + + /** + * Add the possibility to override the PluginClassPath. + * By default if getRuntimeMode() returns RuntimeMode.DEVELOPMENT than a + * DevelopmentPluginClasspath is returned else this method returns + * PluginClasspath. + */ + protected PluginClasspath createPluginClasspath() { + if (RuntimeMode.DEVELOPMENT.equals(getRuntimeMode())) { + return new DevelopmentPluginClasspath(); + } + + return new PluginClasspath(); + } + + protected boolean isPluginDisabled(String pluginId) { + if (enabledPlugins.isEmpty()) { + return disabledPlugins.contains(pluginId); + } + + return !enabledPlugins.contains(pluginId); + } + + protected FileFilter createHiddenPluginFilter() { + return new HiddenFilter(); + } + + /** + * Add the possibility to override the plugins directory. + * If a "pf4j.pluginsDir" system property is defined than this method returns + * that directory. + * If getRuntimeMode() returns RuntimeMode.DEVELOPMENT than a + * DEVELOPMENT_PLUGINS_DIRECTORY ("../plugins") is returned else this method returns + * DEFAULT_PLUGINS_DIRECTORY ("plugins"). + * @return + */ + protected File createPluginsDirectory() { + String pluginsDir = System.getProperty("pf4j.pluginsDir"); + if (pluginsDir == null) { + if (RuntimeMode.DEVELOPMENT.equals(getRuntimeMode())) { + pluginsDir = DEVELOPMENT_PLUGINS_DIRECTORY; + } else { + pluginsDir = DEFAULT_PLUGINS_DIRECTORY; + } + } + + return new File(pluginsDir); + } + + private void initialize() { + plugins = new HashMap(); + pluginClassLoaders = new HashMap(); + pathToIdMap = new HashMap(); + unresolvedPlugins = new ArrayList(); + resolvedPlugins = new ArrayList(); + startedPlugins = new ArrayList(); + disabledPlugins = new ArrayList(); + compoundClassLoader = new CompoundClassLoader(); + + pluginClasspath = createPluginClasspath(); + pluginDescriptorFinder = createPluginDescriptorFinder(); + extensionFinder = createExtensionFinder(); + + try { + // create a list with plugin identifiers that should be only accepted by this manager (whitelist from plugins/enabled.txt file) + enabledPlugins = FileUtils.readLines(new File(pluginsDirectory, "enabled.txt"), true); + log.info("Enabled plugins: {}", enabledPlugins); + + // create a list with plugin identifiers that should not be accepted by this manager (blacklist from plugins/disabled.txt file) + disabledPlugins = FileUtils.readLines(new File(pluginsDirectory, "disabled.txt"), true); + log.info("Disabled plugins: {}", disabledPlugins); + } catch (IOException e) { + log.error(e.getMessage(), e); + } + + System.setProperty("pf4j.pluginsDir", pluginsDirectory.getAbsolutePath()); + } + + private PluginWrapper loadPluginDirectory(File pluginDirectory) throws PluginException { + // try to load the plugin + String pluginName = pluginDirectory.getName(); + String pluginPath = "/".concat(pluginName); + + // test for plugin duplication + if (plugins.get(pathToIdMap.get(pluginPath)) != null) { + return null; + } + + // retrieves the plugin descriptor + log.debug("Find plugin descriptor '{}'", pluginPath); + PluginDescriptor pluginDescriptor = pluginDescriptorFinder.find(pluginDirectory); + log.debug("Descriptor " + pluginDescriptor); + String pluginClassName = pluginDescriptor.getPluginClass(); + log.debug("Class '{}' for plugin '{}'", pluginClassName, pluginPath); + + // test for disabled plugin + if (isPluginDisabled(pluginDescriptor.getPluginId())) { + log.info("Plugin '{}' is disabled", pluginPath); + return null; + } + + // load plugin + log.debug("Loading plugin '{}'", pluginPath); + PluginLoader pluginLoader = new PluginLoader(this, pluginDescriptor, pluginDirectory, pluginClasspath); + pluginLoader.load(); + log.debug("Loaded plugin '{}'", pluginPath); + + // create the plugin wrapper + log.debug("Creating wrapper for plugin '{}'", pluginPath); + PluginWrapper pluginWrapper = new PluginWrapper(pluginDescriptor, pluginPath, pluginLoader.getPluginClassLoader()); + pluginWrapper.setRuntimeMode(getRuntimeMode()); + log.debug("Created wrapper '{}' for plugin '{}'", pluginWrapper, pluginPath); + + String pluginId = pluginDescriptor.getPluginId(); + + // add plugin to the list with plugins + plugins.put(pluginId, pluginWrapper); + unresolvedPlugins.add(pluginWrapper); + + // add plugin class loader to the list with class loaders + PluginClassLoader pluginClassLoader = pluginLoader.getPluginClassLoader(); + pluginClassLoaders.put(pluginId, pluginClassLoader); + + return pluginWrapper; + } + + private File expandPluginArchive(File pluginArchiveFile) throws IOException { + String fileName = pluginArchiveFile.getName(); + long pluginArchiveDate = pluginArchiveFile.lastModified(); + String pluginName = fileName.substring(0, fileName.length() - 4); + File pluginDirectory = new File(pluginsDirectory, pluginName); + // check if exists directory or the '.zip' file is "newer" than directory + if (!pluginDirectory.exists() || (pluginArchiveDate > pluginDirectory.lastModified())) { + log.debug("Expand plugin archive '{}' in '{}'", pluginArchiveFile, pluginDirectory); + + // do not overwrite an old version, remove it + if (pluginDirectory.exists()) { + FileUtils.delete(pluginDirectory); + } + + // create directory for plugin + pluginDirectory.mkdirs(); + + // expand '.zip' file + Unzip unzip = new Unzip(); + unzip.setSource(pluginArchiveFile); + unzip.setDestination(pluginDirectory); + unzip.extract(); + } + return pluginDirectory; + } + + private void resolvePlugins() throws PluginException { + resolveDependencies(); + } + + private void resolveDependencies() throws PluginException { + DependencyResolver dependencyResolver = new DependencyResolver(unresolvedPlugins); + resolvedPlugins = dependencyResolver.getSortedPlugins(); + for (PluginWrapper pluginWrapper : resolvedPlugins) { + unresolvedPlugins.remove(pluginWrapper); + compoundClassLoader.addLoader(pluginWrapper.getPluginClassLoader()); + log.info("Plugin '{}' resolved", pluginWrapper.getDescriptor().getPluginId()); + } + } + +} diff --git a/pf4j/src/main/java/ro/fortsoft/pf4j/ExtensionFinder.java b/pf4j/src/main/java/ro/fortsoft/pf4j/ExtensionFinder.java index 2eeca18..7e22a4a 100644 --- a/pf4j/src/main/java/ro/fortsoft/pf4j/ExtensionFinder.java +++ b/pf4j/src/main/java/ro/fortsoft/pf4j/ExtensionFinder.java @@ -1,11 +1,11 @@ /* * Copyright 2012 Decebal Suiu - * + * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with * the License. You may obtain a copy of the License in the LICENSE file, or at: - * + * * http://www.apache.org/licenses/LICENSE-2.0 - * + * * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. @@ -20,5 +20,7 @@ import java.util.List; public interface ExtensionFinder { public List> find(Class type); - + + public void reset(); + } diff --git a/pf4j/src/main/java/ro/fortsoft/pf4j/PluginManager.java b/pf4j/src/main/java/ro/fortsoft/pf4j/PluginManager.java index 57fb890..ec95c4e 100644 --- a/pf4j/src/main/java/ro/fortsoft/pf4j/PluginManager.java +++ b/pf4j/src/main/java/ro/fortsoft/pf4j/PluginManager.java @@ -12,6 +12,7 @@ */ package ro.fortsoft.pf4j; +import java.io.File; import java.util.List; /** @@ -47,6 +48,14 @@ public interface PluginManager { */ public void loadPlugins(); + /** + * Load a plugin. + * + * @param pluginArchiveFile + * @return the pluginId of the installed plugin or null + */ + public String loadPlugin(File pluginArchiveFile); + /** * Start all active plugins. */