| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License 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 org.onosproject.app.impl; |
| |
| import java.io.InputStream; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.apache.karaf.features.Feature; |
| import org.apache.karaf.features.FeaturesService; |
| import org.onosproject.app.ApplicationAdminService; |
| import org.onosproject.app.ApplicationEvent; |
| import org.onosproject.app.ApplicationListener; |
| import org.onosproject.app.ApplicationService; |
| import org.onosproject.app.ApplicationState; |
| import org.onosproject.app.ApplicationStore; |
| import org.onosproject.app.ApplicationStoreDelegate; |
| import org.onosproject.core.Application; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.event.AbstractListenerManager; |
| import org.onosproject.security.Permission; |
| import org.onosproject.security.SecurityUtil; |
| import org.slf4j.Logger; |
| |
| import com.google.common.collect.Maps; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.onosproject.app.ApplicationEvent.Type.APP_ACTIVATED; |
| import static org.onosproject.app.ApplicationEvent.Type.APP_DEACTIVATED; |
| import static org.onosproject.app.ApplicationEvent.Type.APP_INSTALLED; |
| import static org.onosproject.app.ApplicationEvent.Type.APP_UNINSTALLED; |
| import static org.onosproject.security.AppGuard.checkPermission; |
| import static org.onosproject.security.AppPermission.Type.APP_READ; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Implementation of the application management service. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class ApplicationManager |
| extends AbstractListenerManager<ApplicationEvent, ApplicationListener> |
| implements ApplicationService, ApplicationAdminService { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private static final String APP_ID_NULL = "Application ID cannot be null"; |
| |
| private final ApplicationStoreDelegate delegate = new InternalStoreDelegate(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ApplicationStore store; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected FeaturesService featuresService; |
| |
| private boolean initializing; |
| |
| // Application supplied hooks for pre-activation processing. |
| private final Map<String, Runnable> deactivateHooks = Maps.newConcurrentMap(); |
| |
| @Activate |
| public void activate() { |
| eventDispatcher.addSink(ApplicationEvent.class, listenerRegistry); |
| |
| initializing = true; |
| store.setDelegate(delegate); |
| initializing = false; |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| eventDispatcher.removeSink(ApplicationEvent.class); |
| store.unsetDelegate(delegate); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Set<Application> getApplications() { |
| checkPermission(APP_READ); |
| return store.getApplications(); |
| } |
| |
| @Override |
| public ApplicationId getId(String name) { |
| checkPermission(APP_READ); |
| checkNotNull(name, "Name cannot be null"); |
| return store.getId(name); |
| } |
| |
| @Override |
| public Application getApplication(ApplicationId appId) { |
| checkPermission(APP_READ); |
| checkNotNull(appId, APP_ID_NULL); |
| return store.getApplication(appId); |
| } |
| |
| @Override |
| public ApplicationState getState(ApplicationId appId) { |
| checkPermission(APP_READ); |
| checkNotNull(appId, APP_ID_NULL); |
| return store.getState(appId); |
| } |
| |
| @Override |
| public Set<Permission> getPermissions(ApplicationId appId) { |
| checkPermission(APP_READ); |
| checkNotNull(appId, APP_ID_NULL); |
| return store.getPermissions(appId); |
| } |
| |
| @Override |
| public void registerDeactivateHook(ApplicationId appId, Runnable hook) { |
| checkPermission(APP_READ); |
| checkNotNull(appId, APP_ID_NULL); |
| checkNotNull(hook, "Hook cannot be null"); |
| deactivateHooks.put(appId.name(), hook); |
| } |
| |
| @Override |
| public Application install(InputStream appDescStream) { |
| checkNotNull(appDescStream, "Application archive stream cannot be null"); |
| Application app = store.create(appDescStream); |
| SecurityUtil.register(app.id()); |
| return app; |
| } |
| |
| @Override |
| public void uninstall(ApplicationId appId) { |
| checkNotNull(appId, APP_ID_NULL); |
| try { |
| store.remove(appId); |
| } catch (Exception e) { |
| log.warn("Unable to purge application directory for {}", appId.name()); |
| } |
| } |
| |
| @Override |
| public void activate(ApplicationId appId) { |
| checkNotNull(appId, APP_ID_NULL); |
| if (!SecurityUtil.isAppSecured(appId)) { |
| return; |
| } |
| store.activate(appId); |
| } |
| |
| @Override |
| public void deactivate(ApplicationId appId) { |
| checkNotNull(appId, APP_ID_NULL); |
| store.deactivate(appId); |
| } |
| |
| @Override |
| public void setPermissions(ApplicationId appId, Set<Permission> permissions) { |
| checkNotNull(appId, APP_ID_NULL); |
| checkNotNull(permissions, "Permissions cannot be null"); |
| store.setPermissions(appId, permissions); |
| } |
| |
| private class InternalStoreDelegate implements ApplicationStoreDelegate { |
| @Override |
| public void notify(ApplicationEvent event) { |
| ApplicationEvent.Type type = event.type(); |
| Application app = event.subject(); |
| try { |
| if (type == APP_ACTIVATED) { |
| if (installAppFeatures(app)) { |
| log.info("Application {} has been activated", app.id().name()); |
| } |
| |
| } else if (type == APP_DEACTIVATED) { |
| if (uninstallAppFeatures(app)) { |
| log.info("Application {} has been deactivated", app.id().name()); |
| } |
| |
| } else if (type == APP_INSTALLED) { |
| if (installAppArtifacts(app)) { |
| log.info("Application {} has been installed", app.id().name()); |
| } |
| |
| } else if (type == APP_UNINSTALLED) { |
| if (uninstallAppFeatures(app) || uninstallAppArtifacts(app)) { |
| log.info("Application {} has been uninstalled", app.id().name()); |
| } |
| |
| } |
| post(event); |
| |
| } catch (Exception e) { |
| log.warn("Unable to perform operation on application " + app.id().name(), e); |
| } |
| } |
| } |
| |
| // The following methods are fully synchronized to guard against remote vs. |
| // locally induced feature service interactions. |
| |
| // Installs all feature repositories required by the specified app. |
| private synchronized boolean installAppArtifacts(Application app) throws Exception { |
| if (app.featuresRepo().isPresent() && |
| featuresService.getRepository(app.featuresRepo().get()) == null) { |
| featuresService.addRepository(app.featuresRepo().get()); |
| return true; |
| } |
| return false; |
| } |
| |
| // Uninstalls all the feature repositories required by the specified app. |
| private synchronized boolean uninstallAppArtifacts(Application app) throws Exception { |
| if (app.featuresRepo().isPresent() && |
| featuresService.getRepository(app.featuresRepo().get()) != null) { |
| featuresService.removeRepository(app.featuresRepo().get()); |
| return true; |
| } |
| return false; |
| } |
| |
| // Installs all features that define the specified app. |
| private synchronized boolean installAppFeatures(Application app) throws Exception { |
| boolean changed = false; |
| for (String name : app.features()) { |
| Feature feature = featuresService.getFeature(name); |
| |
| // If we see an attempt at activation of a non-existent feature |
| // attempt to install the app artifacts first and then retry. |
| // This can be triggered by a race condition between different ONOS |
| // instances "installing" the apps from disk at their own pace. |
| // Perhaps there is a more elegant solution to be explored in the |
| // future. |
| if (feature == null) { |
| installAppArtifacts(app); |
| feature = featuresService.getFeature(name); |
| } |
| |
| if (feature != null && !featuresService.isInstalled(feature)) { |
| featuresService.installFeature(name); |
| changed = true; |
| } else if (feature == null) { |
| log.warn("Feature {} not found", name); |
| } |
| } |
| return changed; |
| } |
| |
| // Uninstalls all features that define the specified app. |
| private synchronized boolean uninstallAppFeatures(Application app) throws Exception { |
| boolean changed = false; |
| invokeHook(deactivateHooks.get(app.id().name()), app.id()); |
| for (String name : app.features()) { |
| Feature feature = featuresService.getFeature(name); |
| if (feature != null && featuresService.isInstalled(feature)) { |
| featuresService.uninstallFeature(name); |
| changed = true; |
| } else if (feature == null) { |
| log.warn("Feature {} not found", name); |
| } |
| } |
| return changed; |
| } |
| |
| // Invokes the specified function, if not null. |
| @java.lang.SuppressWarnings("squid:S1217") // We really do mean to call run() |
| private void invokeHook(Runnable hook, ApplicationId appId) { |
| if (hook != null) { |
| try { |
| hook.run(); |
| } catch (Exception e) { |
| log.warn("Deactivate hook for application {} encountered an error", |
| appId.name(), e); |
| } |
| } |
| } |
| |
| } |