ONOS-542 Defining application subsystem interfaces & public constructs.
Change-Id: Iba0d2cb69dace5beee8a68def9918059ce755b5c
diff --git a/core/net/src/main/java/org/onosproject/app/impl/ApplicationManager.java b/core/net/src/main/java/org/onosproject/app/impl/ApplicationManager.java
new file mode 100644
index 0000000..08c91a4
--- /dev/null
+++ b/core/net/src/main/java/org/onosproject/app/impl/ApplicationManager.java
@@ -0,0 +1,215 @@
+/*
+ * 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 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.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.core.Permission;
+import org.onosproject.event.AbstractListenerRegistry;
+import org.onosproject.event.EventDeliveryService;
+import org.slf4j.Logger;
+
+import java.io.InputStream;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onosproject.app.ApplicationEvent.Type.*;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Implementation of the application management service.
+ */
+@Component(immediate = true)
+@Service
+public class ApplicationManager implements ApplicationService, ApplicationAdminService {
+
+ private final Logger log = getLogger(getClass());
+
+ private static final String APP_ID_NULL = "Application ID cannot be null";
+
+ protected final AbstractListenerRegistry<ApplicationEvent, ApplicationListener>
+ listenerRegistry = new AbstractListenerRegistry<>();
+
+ private final ApplicationStoreDelegate delegate = new InternalStoreDelegate();
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ApplicationStore store;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected FeaturesService featuresService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected EventDeliveryService eventDispatcher;
+
+ @Activate
+ public void activate() {
+ store.setDelegate(delegate);
+ eventDispatcher.addSink(ApplicationEvent.class, listenerRegistry);
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ store.unsetDelegate(delegate);
+ eventDispatcher.removeSink(ApplicationEvent.class);
+ log.info("Stopped");
+ }
+
+ @Override
+ public Set<Application> getApplications() {
+ return store.getApplications();
+ }
+
+ @Override
+ public ApplicationId getId(String name) {
+ checkNotNull(name, "Name cannot be null");
+ return store.getId(name);
+ }
+
+ @Override
+ public Application getApplication(ApplicationId appId) {
+ checkNotNull(appId, APP_ID_NULL);
+ return store.getApplication(appId);
+ }
+
+ @Override
+ public ApplicationState getState(ApplicationId appId) {
+ checkNotNull(appId, APP_ID_NULL);
+ return store.getState(appId);
+ }
+
+ @Override
+ public Set<Permission> getPermissions(ApplicationId appId) {
+ checkNotNull(appId, APP_ID_NULL);
+ return store.getPermissions(appId);
+ }
+
+ @Override
+ public Application install(InputStream appDescStream) {
+ checkNotNull(appDescStream, "Application archive stream cannot be null");
+ return store.create(appDescStream);
+ }
+
+ @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);
+ 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);
+ }
+
+ @Override
+ public void addListener(ApplicationListener listener) {
+ listenerRegistry.addListener(listener);
+ }
+
+ @Override
+ public void removeListener(ApplicationListener listener) {
+ listenerRegistry.removeListener(listener);
+ }
+
+ 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) {
+ installAppFeatures(app);
+ log.info("Application {} has been activated", app.id().name());
+
+ } else if (type == APP_DEACTIVATED) {
+ uninstallAppFeatures(app);
+ log.info("Application {} has been deactivated", app.id().name());
+
+ } else if (type == APP_INSTALLED) {
+ installAppArtifacts(app);
+ log.info("Application {} has been installed", app.id().name());
+
+ } else if (type == APP_UNINSTALLED) {
+ uninstallAppFeatures(app);
+ uninstallAppArtifacts(app);
+ log.info("Application {} has been uninstalled", app.id().name());
+
+ }
+ eventDispatcher.post(event);
+
+ } catch (Exception e) {
+ log.warn("Unable to perform operation on application " + app.id().name(), e);
+ }
+ }
+ }
+
+ private void installAppArtifacts(Application app) throws Exception {
+ if (app.featuresRepo().isPresent()) {
+ featuresService.addRepository(app.featuresRepo().get());
+ }
+ }
+
+ private void uninstallAppArtifacts(Application app) throws Exception {
+ if (app.featuresRepo().isPresent()) {
+ featuresService.removeRepository(app.featuresRepo().get());
+ }
+ }
+
+ private void installAppFeatures(Application app) throws Exception {
+ for (String name : app.features()) {
+ featuresService.installFeature(name);
+ }
+ }
+
+ private void uninstallAppFeatures(Application app) throws Exception {
+ for (String name : app.features()) {
+ featuresService.uninstallFeature(name);
+ }
+ }
+
+}