2 * Copyright (c) 2016 Brocade Communications Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.blueprint;
10 import com.google.common.base.Optional;
11 import com.google.common.base.Preconditions;
12 import com.google.common.collect.Lists;
13 import com.google.common.util.concurrent.ThreadFactoryBuilder;
14 import java.lang.management.ManagementFactory;
15 import java.util.AbstractMap.SimpleEntry;
16 import java.util.ArrayDeque;
17 import java.util.ArrayList;
18 import java.util.Arrays;
19 import java.util.Collections;
20 import java.util.Deque;
21 import java.util.Dictionary;
22 import java.util.Hashtable;
23 import java.util.LinkedHashSet;
24 import java.util.List;
25 import java.util.Map.Entry;
27 import java.util.concurrent.CountDownLatch;
28 import java.util.concurrent.ExecutorService;
29 import java.util.concurrent.Executors;
30 import java.util.concurrent.TimeUnit;
31 import javax.annotation.Nullable;
32 import javax.management.InstanceNotFoundException;
33 import javax.management.ObjectName;
34 import javax.xml.parsers.ParserConfigurationException;
35 import org.apache.aries.blueprint.services.BlueprintExtenderService;
36 import org.apache.aries.quiesce.participant.QuiesceParticipant;
37 import org.apache.aries.util.AriesFrameworkUtil;
38 import org.opendaylight.controller.config.api.ConfigRegistry;
39 import org.opendaylight.controller.config.api.ConflictingVersionException;
40 import org.opendaylight.controller.config.api.ModuleIdentifier;
41 import org.opendaylight.controller.config.api.ValidationException;
42 import org.opendaylight.controller.config.facade.xml.ConfigExecution;
43 import org.opendaylight.controller.config.facade.xml.ConfigSubsystemFacade;
44 import org.opendaylight.controller.config.facade.xml.ConfigSubsystemFacadeFactory;
45 import org.opendaylight.controller.config.facade.xml.TestOption;
46 import org.opendaylight.controller.config.facade.xml.mapping.config.Config;
47 import org.opendaylight.controller.config.facade.xml.strategy.EditStrategyType;
48 import org.opendaylight.controller.config.util.ConfigRegistryJMXClient;
49 import org.opendaylight.controller.config.util.xml.DocumentedException;
50 import org.opendaylight.controller.config.util.xml.XmlElement;
51 import org.opendaylight.controller.config.util.xml.XmlMappingConstants;
52 import org.opendaylight.controller.config.util.xml.XmlUtil;
53 import org.osgi.framework.Bundle;
54 import org.osgi.framework.BundleContext;
55 import org.osgi.framework.ServiceReference;
56 import org.osgi.framework.ServiceRegistration;
57 import org.osgi.service.blueprint.container.EventConstants;
58 import org.osgi.service.event.EventHandler;
59 import org.slf4j.Logger;
60 import org.slf4j.LoggerFactory;
61 import org.w3c.dom.Document;
62 import org.w3c.dom.Element;
65 * Implementation of the BlueprintContainerRestartService.
67 * @author Thomas Pantelis
69 class BlueprintContainerRestartServiceImpl implements AutoCloseable, BlueprintContainerRestartService {
70 private static final Logger LOG = LoggerFactory.getLogger(BlueprintContainerRestartServiceImpl.class);
71 private static final int CONTAINER_CREATE_TIMEOUT_IN_MINUTES = 5;
72 private static final String CONFIG_MODULE_NAMESPACE_PROP = "config-module-namespace";
73 private static final String CONFIG_MODULE_NAME_PROP = "config-module-name";
74 private static final String CONFIG_INSTANCE_NAME_PROP = "config-instance-name";
76 private final ExecutorService restartExecutor = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder()
77 .setDaemon(true).setNameFormat("BlueprintContainerRestartService").build());
79 private BlueprintExtenderService blueprintExtenderService;
80 private QuiesceParticipant quiesceParticipant;
82 void setBlueprintExtenderService(final BlueprintExtenderService blueprintExtenderService) {
83 this.blueprintExtenderService = blueprintExtenderService;
86 void setQuiesceParticipant(final QuiesceParticipant quiesceParticipant) {
87 this.quiesceParticipant = quiesceParticipant;
90 public void restartContainer(final Bundle bundle, final List<Object> paths) {
91 if (restartExecutor.isShutdown()) {
95 LOG.debug("restartContainer for bundle {}", bundle);
97 restartExecutor.execute(() -> {
98 blueprintExtenderService.destroyContainer(bundle, blueprintExtenderService.getContainer(bundle));
99 blueprintExtenderService.createContainer(bundle, paths);
104 public void restartContainerAndDependents(final Bundle bundle) {
105 if (restartExecutor.isShutdown()) {
109 LOG.debug("restartContainerAndDependents for bundle {}", bundle);
111 restartExecutor.execute(() -> restartContainerAndDependentsInternal(bundle));
114 private void restartContainerAndDependentsInternal(Bundle forBundle) {
115 Preconditions.checkNotNull(blueprintExtenderService);
116 Preconditions.checkNotNull(quiesceParticipant);
118 // We use a LinkedHashSet to preserve insertion order as we walk the service usage hierarchy.
119 Set<Bundle> containerBundlesSet = new LinkedHashSet<>();
120 List<Entry<String, ModuleIdentifier>> configModules = new ArrayList<>();
121 findDependentContainersRecursively(forBundle, containerBundlesSet, configModules);
123 List<Bundle> containerBundles = new ArrayList<>(containerBundlesSet);
125 LOG.info("Restarting blueprint containers for bundle {} and its dependent bundles {}", forBundle,
126 containerBundles.subList(1, containerBundles.size()));
128 // The blueprint containers are created asynchronously so we register a handler for blueprint events
129 // that are sent when a container is complete, successful or not. The CountDownLatch tells when all
130 // containers are complete. This is done to ensure all blueprint containers are finished before we
131 // restart config modules.
132 final CountDownLatch containerCreationComplete = new CountDownLatch(containerBundles.size());
133 ServiceRegistration<?> eventHandlerReg = registerEventHandler(forBundle.getBundleContext(), event -> {
134 LOG.debug("handleEvent {} for bundle {}", event.getTopic(), event.getProperty(EventConstants.BUNDLE));
135 if (containerBundles.contains(event.getProperty(EventConstants.BUNDLE))) {
136 containerCreationComplete.countDown();
140 final Runnable createContainerCallback = () -> createContainers(containerBundles);
142 // Destroy the container down-top recursively and once done, restart the container top-down
143 destroyContainers(new ArrayDeque<>(Lists.reverse(containerBundles)), createContainerCallback);
147 if (!containerCreationComplete.await(CONTAINER_CREATE_TIMEOUT_IN_MINUTES, TimeUnit.MINUTES)) {
148 LOG.warn("Failed to restart all blueprint containers within {} minutes. Attempted to restart {} {} "
149 + "but only {} completed restart", CONTAINER_CREATE_TIMEOUT_IN_MINUTES, containerBundles.size(),
150 containerBundles, containerBundles.size() - containerCreationComplete.getCount());
153 } catch (InterruptedException e) {
154 LOG.debug("CountDownLatch await was interrupted - returning");
158 AriesFrameworkUtil.safeUnregisterService(eventHandlerReg);
160 // Now restart any associated config system Modules.
161 restartConfigModules(forBundle.getBundleContext(), configModules);
165 * Recursively quiesce and destroy the bundles one by one in order to maintain synchronicity and ordering.
166 * @param remainingBundlesToDestroy the list of remaining bundles to destroy.
167 * @param createContainerCallback a {@link Runnable} to {@code run()} when the recursive function is completed.
169 private void destroyContainers(final Deque<Bundle> remainingBundlesToDestroy,
170 final Runnable createContainerCallback) {
172 final Bundle nextBundle;
173 synchronized (remainingBundlesToDestroy) {
174 if (remainingBundlesToDestroy.isEmpty()) {
175 LOG.debug("All blueprint containers were quiesced and destroyed");
176 createContainerCallback.run();
180 nextBundle = remainingBundlesToDestroy.poll();
183 // The Quiesce capability is a like a soft-stop, clean-stop. In the case of the Blueprint extender, in flight
184 // service calls are allowed to finish; they're counted in and counted out, and no new calls are allowed. When
185 // there are no in flight service calls, the bundle is told to stop. The Blueprint bundle itself doesn't know
186 // this is happening which is a key design point. In the case of Blueprint, the extender ensures no new Entity
187 // Managers(EMs) are created. Then when all those EMs are closed the quiesce operation reports that it is
189 // To properly restart the blueprint containers, first we have to quiesce the list of bundles, and once done, it
190 // is safe to destroy their BlueprintContainer, so no reference is retained.
192 // Mail - thread explaining Quiesce API:
193 // https://www.mail-archive.com/dev@aries.apache.org/msg08403.html
195 // Quiesced the bundle to unregister the associated BlueprintContainer
196 quiesceParticipant.quiesce(bundlesQuiesced -> {
198 // Destroy the container once Quiesced
199 Arrays.stream(bundlesQuiesced).forEach(quiescedBundle -> {
200 LOG.debug("Quiesced bundle {}", quiescedBundle);
201 blueprintExtenderService.destroyContainer(
202 quiescedBundle, blueprintExtenderService.getContainer(quiescedBundle));
205 destroyContainers(remainingBundlesToDestroy, createContainerCallback);
207 }, Collections.singletonList(nextBundle));
210 private void createContainers(List<Bundle> containerBundles) {
211 containerBundles.forEach(bundle -> {
212 List<Object> paths = BlueprintBundleTracker.findBlueprintPaths(bundle);
214 LOG.info("Restarting blueprint container for bundle {} with paths {}", bundle, paths);
216 blueprintExtenderService.createContainer(bundle, paths);
220 private void restartConfigModules(BundleContext bundleContext, List<Entry<String,
221 ModuleIdentifier>> configModules) {
222 if (configModules.isEmpty()) {
226 ServiceReference<ConfigSubsystemFacadeFactory> configFacadeFactoryRef = bundleContext
227 .getServiceReference(ConfigSubsystemFacadeFactory.class);
228 if (configFacadeFactoryRef == null) {
229 LOG.debug("ConfigSubsystemFacadeFactory service reference not found");
233 ConfigSubsystemFacadeFactory configFacadeFactory = bundleContext.getService(configFacadeFactoryRef);
234 if (configFacadeFactory == null) {
235 LOG.debug("ConfigSubsystemFacadeFactory service not found");
239 try (ConfigSubsystemFacade configFacade = configFacadeFactory.createFacade(
240 "BlueprintContainerRestartService")) {
241 restartConfigModules(configModules, configFacade);
242 } catch (ParserConfigurationException | DocumentedException | ValidationException
243 | ConflictingVersionException e) {
244 LOG.error("Error restarting config modules", e);
246 bundleContext.ungetService(configFacadeFactoryRef);
251 private void restartConfigModules(List<Entry<String, ModuleIdentifier>> configModules,
252 ConfigSubsystemFacade configFacade) throws ParserConfigurationException, DocumentedException,
253 ValidationException, ConflictingVersionException {
255 Document document = XmlUtil.newDocument();
256 Element dataElement = XmlUtil.createElement(document, XmlMappingConstants.DATA_KEY, Optional.<String>absent());
257 Element modulesElement = XmlUtil.createElement(document, XmlMappingConstants.MODULES_KEY,
258 Optional.of(XmlMappingConstants.URN_OPENDAYLIGHT_PARAMS_XML_NS_YANG_CONTROLLER_CONFIG));
259 dataElement.appendChild(modulesElement);
261 Config configMapping = configFacade.getConfigMapping();
263 ConfigRegistry configRegistryClient = new ConfigRegistryJMXClient(ManagementFactory.getPlatformMBeanServer());
264 for (Entry<String, ModuleIdentifier> entry : configModules) {
265 String moduleNamespace = entry.getKey();
266 ModuleIdentifier moduleId = entry.getValue();
268 ObjectName instanceON = configRegistryClient.lookupConfigBean(moduleId.getFactoryName(),
269 moduleId.getInstanceName());
271 LOG.debug("Found config module instance ObjectName: {}", instanceON);
273 Element moduleElement = configMapping.moduleToXml(moduleNamespace, moduleId.getFactoryName(),
274 moduleId.getInstanceName(), instanceON, document);
275 modulesElement.appendChild(moduleElement);
276 } catch (InstanceNotFoundException e) {
277 LOG.warn("Error looking up config module: namespace {}, module name {}, instance {}",
278 moduleNamespace, moduleId.getFactoryName(), moduleId.getInstanceName(), e);
282 if (LOG.isDebugEnabled()) {
283 LOG.debug("Pushing config xml: {}", XmlUtil.toString(dataElement));
286 ConfigExecution execution = new ConfigExecution(configMapping, XmlElement.fromDomElement(dataElement),
287 TestOption.testThenSet, EditStrategyType.recreate);
288 configFacade.executeConfigExecution(execution);
289 configFacade.commitSilentTransaction();
293 * Recursively finds the services registered by the given bundle and the bundles using those services.
294 * User bundles that have an associated blueprint container are added to containerBundles. In addition,
295 * if a registered service has an associated config system Module, as determined via the presence of
296 * certain service properties, the ModuleIdentifier is added to the configModules list.
298 * @param bundle the bundle to traverse
299 * @param containerBundles the current set of bundles containing blueprint containers
300 * @param configModules the current set of bundles containing config modules
302 private void findDependentContainersRecursively(Bundle bundle, Set<Bundle> containerBundles,
303 List<Entry<String, ModuleIdentifier>> configModules) {
304 if (!containerBundles.add(bundle)) {
305 // Already seen this bundle...
309 ServiceReference<?>[] references = bundle.getRegisteredServices();
310 if (references != null) {
311 for (ServiceReference<?> reference : references) {
312 possiblyAddConfigModuleIdentifier(reference, configModules);
314 Bundle[] usingBundles = reference.getUsingBundles();
315 if (usingBundles != null) {
316 for (Bundle usingBundle : usingBundles) {
317 if (blueprintExtenderService.getContainer(usingBundle) != null) {
318 findDependentContainersRecursively(usingBundle, containerBundles, configModules);
326 private void possiblyAddConfigModuleIdentifier(ServiceReference<?> reference,
327 List<Entry<String, ModuleIdentifier>> configModules) {
328 Object moduleNamespace = reference.getProperty(CONFIG_MODULE_NAMESPACE_PROP);
329 if (moduleNamespace == null) {
333 String moduleName = getRequiredConfigModuleProperty(CONFIG_MODULE_NAME_PROP, moduleNamespace,
335 String instanceName = getRequiredConfigModuleProperty(CONFIG_INSTANCE_NAME_PROP, moduleNamespace,
337 if (moduleName == null || instanceName == null) {
341 LOG.debug("Found service with config module: namespace {}, module name {}, instance {}",
342 moduleNamespace, moduleName, instanceName);
344 configModules.add(new SimpleEntry<>(moduleNamespace.toString(),
345 new ModuleIdentifier(moduleName, instanceName)));
349 private String getRequiredConfigModuleProperty(String propName, Object moduleNamespace,
350 ServiceReference<?> reference) {
351 Object value = reference.getProperty(propName);
354 "OSGi service with {} property is missing property {} therefore the config module can't be restarted",
355 CONFIG_MODULE_NAMESPACE_PROP, propName);
359 return value.toString();
362 private ServiceRegistration<?> registerEventHandler(BundleContext bundleContext, EventHandler handler) {
363 Dictionary<String, Object> props = new Hashtable<>();
364 props.put(org.osgi.service.event.EventConstants.EVENT_TOPIC,
365 new String[]{EventConstants.TOPIC_CREATED, EventConstants.TOPIC_FAILURE});
366 return bundleContext.registerService(EventHandler.class.getName(), handler, props);
370 public void close() {
371 restartExecutor.shutdownNow();