+++ /dev/null
-/*
- * Copyright (c) 2016 Brocade Communications Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-package org.opendaylight.controller.blueprint.ext;
-
-import com.google.common.io.Resources;
-import java.io.IOException;
-import java.net.URL;
-import java.nio.charset.StandardCharsets;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-import java.util.concurrent.ConcurrentSkipListSet;
-import org.osgi.framework.Bundle;
-import org.osgi.framework.BundleEvent;
-import org.osgi.framework.ServiceReference;
-import org.osgi.service.blueprint.container.ComponentDefinitionException;
-import org.osgi.util.tracker.BundleTracker;
-import org.osgi.util.tracker.BundleTrackerCustomizer;
-import org.osgi.util.tracker.ServiceTracker;
-import org.osgi.util.tracker.ServiceTrackerCustomizer;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Factory metadata corresponding to the "specific-reference-list" element that obtains a specific list
- * of service instances from the OSGi registry for a given interface. The specific list is learned by first
- * extracting the list of expected service types by inspecting RESOLVED bundles for a resource file under
- * META-INF/services with the same name as the given interface. The type(s) listed in the resource file
- * must match the "type" property of the advertised service(s). In this manner, an app bundle announces the
- * service type(s) that it will advertise so that this class knows which services to expect up front. Once
- * all the expected services are obtained, the container is notified that all dependencies of this component
- * factory are satisfied.
- *
- * @author Thomas Pantelis
- */
-class SpecificReferenceListMetadata extends AbstractDependentComponentFactoryMetadata {
- private static final Logger LOG = LoggerFactory.getLogger(SpecificReferenceListMetadata.class);
-
- private final String interfaceName;
- private final String serviceResourcePath;
- private final Collection<String> expectedServiceTypes = new ConcurrentSkipListSet<>();
- private final Collection<String> retrievedServiceTypes = new ConcurrentSkipListSet<>();
- private final Collection<Object> retrievedServices = Collections.synchronizedList(new ArrayList<>());
- private volatile BundleTracker<Bundle> bundleTracker;
- private volatile ServiceTracker<Object, Object> serviceTracker;
-
- SpecificReferenceListMetadata(final String id, final String interfaceName) {
- super(id);
- this.interfaceName = interfaceName;
- serviceResourcePath = "META-INF/services/" + interfaceName;
- }
-
- @Override
- protected void startTracking() {
- BundleTrackerCustomizer<Bundle> bundleListener = new BundleTrackerCustomizer<>() {
- @Override
- public Bundle addingBundle(final Bundle bundle, final BundleEvent event) {
- bundleAdded(bundle);
- return bundle;
- }
-
- @Override
- public void modifiedBundle(final Bundle bundle, final BundleEvent event, final Bundle object) {
- }
-
- @Override
- public void removedBundle(final Bundle bundle, final BundleEvent event, final Bundle object) {
- }
- };
-
- bundleTracker = new BundleTracker<>(container().getBundleContext(), Bundle.RESOLVED | Bundle.STARTING
- | Bundle.STOPPING | Bundle.ACTIVE, bundleListener);
-
- // This will get the list of all current RESOLVED+ bundles.
- bundleTracker.open();
-
- if (expectedServiceTypes.isEmpty()) {
- setSatisfied();
- return;
- }
-
- ServiceTrackerCustomizer<Object, Object> serviceListener = new ServiceTrackerCustomizer<>() {
- @Override
- public Object addingService(final ServiceReference<Object> reference) {
- return serviceAdded(reference);
- }
-
- @Override
- public void modifiedService(final ServiceReference<Object> reference, final Object service) {
- }
-
- @Override
- public void removedService(final ServiceReference<Object> reference, final Object service) {
- container().getBundleContext().ungetService(reference);
- }
- };
-
- setDependencyDesc(interfaceName + " services with types " + expectedServiceTypes);
-
- serviceTracker = new ServiceTracker<>(container().getBundleContext(), interfaceName, serviceListener);
- serviceTracker.open();
- }
-
- private void bundleAdded(final Bundle bundle) {
- URL resource = bundle.getEntry(serviceResourcePath);
- if (resource == null) {
- return;
- }
-
- LOG.debug("{}: Found {} resource in bundle {}", logName(), resource, bundle.getSymbolicName());
-
- try {
- for (String line : Resources.readLines(resource, StandardCharsets.UTF_8)) {
- int ci = line.indexOf('#');
- if (ci >= 0) {
- line = line.substring(0, ci);
- }
-
- line = line.trim();
- if (line.isEmpty()) {
- continue;
- }
-
- String serviceType = line;
- LOG.debug("{}: Retrieved service type {}", logName(), serviceType);
- expectedServiceTypes.add(serviceType);
- }
- } catch (final IOException e) {
- setFailure(String.format("%s: Error reading resource %s from bundle %s", logName(), resource,
- bundle.getSymbolicName()), e);
- }
- }
-
- private Object serviceAdded(final ServiceReference<Object> reference) {
- Object service = container().getBundleContext().getService(reference);
- String serviceType = (String) reference.getProperty(OpendaylightNamespaceHandler.TYPE_ATTR);
-
- LOG.debug("{}: Service type {} added from bundle {}", logName(), serviceType,
- reference.getBundle().getSymbolicName());
-
- if (serviceType == null) {
- LOG.error("{}: Missing OSGi service property '{}' for service interface {} in bundle {}", logName(),
- OpendaylightNamespaceHandler.TYPE_ATTR, interfaceName, reference.getBundle().getSymbolicName());
- return service;
- }
-
- if (!expectedServiceTypes.contains(serviceType)) {
- LOG.error("{}: OSGi service property '{}' for service interface {} in bundle {} was not found in the "
- + "expected service types {} obtained via {} bundle resources. Is the bundle resource missing or "
- + "the service type misspelled?", logName(), OpendaylightNamespaceHandler.TYPE_ATTR, interfaceName,
- reference.getBundle().getSymbolicName(), expectedServiceTypes, serviceResourcePath);
- return service;
- }
-
- // If already satisfied, meaning we got all initial services, then a new bundle must've been
- // dynamically installed or a prior service's blueprint container was restarted, in which case we
- // restart our container.
- if (isSatisfied()) {
- restartContainer();
- } else {
- retrievedServiceTypes.add(serviceType);
- retrievedServices.add(service);
-
- if (retrievedServiceTypes.equals(expectedServiceTypes)) {
- LOG.debug("{}: Got all expected service types", logName());
- setSatisfied();
- } else {
- Set<String> remaining = new HashSet<>(expectedServiceTypes);
- remaining.removeAll(retrievedServiceTypes);
- setDependencyDesc(interfaceName + " services with types " + remaining);
- }
- }
-
- return service;
- }
-
- @Override
- public Object create() throws ComponentDefinitionException {
- LOG.debug("{}: In create: interfaceName: {}", logName(), interfaceName);
-
- super.onCreate();
-
- LOG.debug("{}: create returning service list {}", logName(), retrievedServices);
-
- synchronized (retrievedServices) {
- return List.copyOf(retrievedServices);
- }
- }
-
- @Override
- public void destroy(final Object instance) {
- super.destroy(instance);
-
- if (bundleTracker != null) {
- bundleTracker.close();
- bundleTracker = null;
- }
-
- if (serviceTracker != null) {
- serviceTracker.close();
- serviceTracker = null;
- }
- }
-
- @Override
- public String toString() {
- return new StringBuilder()
- .append("SpecificReferenceListMetadata [interfaceName=").append(interfaceName)
- .append(", serviceResourcePath=").append(serviceResourcePath).append("]")
- .toString();
- }
-}
Code Review / controller.git / blobdiff