| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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.cluster.impl; |
| |
| import org.apache.felix.scr.Component; |
| import org.apache.felix.scr.ScrService; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.karaf.features.Feature; |
| import org.apache.karaf.features.FeaturesService; |
| import org.onlab.util.SharedScheduledExecutors; |
| import org.onosproject.cluster.ClusterAdminService; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.service.component.ComponentContext; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Monitors the system to make sure that all bundles and their components |
| * are properly activated and keeps the cluster node service appropriately |
| * updated. |
| */ |
| @org.apache.felix.scr.annotations.Component(immediate = true) |
| public class ComponentsMonitor { |
| |
| private Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private static final long PERIOD = 2500; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected FeaturesService featuresService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ScrService scrService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterAdminService clusterAdminService; |
| |
| private BundleContext bundleContext; |
| private ScheduledFuture<?> poller; |
| |
| @Activate |
| protected void activate(ComponentContext context) { |
| bundleContext = context.getBundleContext(); |
| poller = SharedScheduledExecutors.getSingleThreadExecutor() |
| .scheduleAtFixedRate(this::checkStartedState, PERIOD, |
| PERIOD, TimeUnit.MILLISECONDS); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| poller.cancel(false); |
| log.info("Stopped"); |
| } |
| |
| private void checkStartedState() { |
| clusterAdminService.markFullyStarted(isFullyStarted()); |
| } |
| |
| /** |
| * Scans the system to make sure that all bundles and their components |
| * are fully started. |
| * |
| * @return true if all bundles and their components are active |
| */ |
| private boolean isFullyStarted() { |
| for (Feature feature : featuresService.listInstalledFeatures()) { |
| if (!isFullyStarted(feature)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private boolean isFullyStarted(Feature feature) { |
| try { |
| return feature.getBundles().stream() |
| .map(info -> bundleContext.getBundle(info.getLocation())) |
| .allMatch(this::isFullyStarted); |
| } catch (NullPointerException npe) { |
| // FIXME: Remove this catch block when Felix fixes the bug |
| // Due to a bug in the Felix implementation, this can throw an NPE. |
| // Catch the error and do something sensible with it. |
| return false; |
| } |
| } |
| |
| private boolean isFullyStarted(Bundle bundle) { |
| Component[] components = scrService.getComponents(bundle); |
| if (components != null) { |
| for (Component component : components) { |
| if (!isFullyStarted(component)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| private boolean isFullyStarted(Component component) { |
| int state = component.getState(); |
| return state == Component.STATE_ACTIVE || state == Component.STATE_DISABLED || |
| (state == Component.STATE_REGISTERED && !component.isImmediate()); |
| } |
| |
| } |