import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
-import java.util.Comparator;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import org.apache.aries.blueprint.NamespaceHandler;
import org.apache.aries.blueprint.services.BlueprintExtenderService;
+import org.apache.aries.quiesce.participant.QuiesceParticipant;
import org.apache.aries.util.AriesFrameworkUtil;
import org.opendaylight.controller.blueprint.ext.OpendaylightNamespaceHandler;
import org.opendaylight.controller.config.api.ConfigSystemService;
private static final String BLUEPRINT_FLE_PATTERN = "*.xml";
private static final long SYSTEM_BUNDLE_ID = 0;
- private ServiceTracker<BlueprintExtenderService, BlueprintExtenderService> serviceTracker;
+ private ServiceTracker<BlueprintExtenderService, BlueprintExtenderService> blueprintExtenderServiceTracker;
+ private ServiceTracker<QuiesceParticipant, QuiesceParticipant> quiesceParticipantTracker;
private BundleTracker<Bundle> bundleTracker;
private BundleContext bundleContext;
private volatile BlueprintExtenderService blueprintExtenderService;
+ private volatile QuiesceParticipant quiesceParticipant;
private volatile ServiceRegistration<?> blueprintContainerRestartReg;
private volatile BlueprintContainerRestartServiceImpl restartService;
private volatile boolean shuttingDown;
* Implemented from BundleActivator.
*/
@Override
- public void start(BundleContext context) {
+ public void start(final BundleContext context) {
LOG.info("Starting {}", getClass().getSimpleName());
+ restartService = new BlueprintContainerRestartServiceImpl();
+
bundleContext = context;
registerBlueprintEventHandler(context);
bundleTracker = new BundleTracker<>(context, Bundle.ACTIVE, this);
- serviceTracker = new ServiceTracker<>(context, BlueprintExtenderService.class.getName(),
+ blueprintExtenderServiceTracker = new ServiceTracker<>(context, BlueprintExtenderService.class.getName(),
new ServiceTrackerCustomizer<BlueprintExtenderService, BlueprintExtenderService>() {
@Override
public BlueprintExtenderService addingService(
- ServiceReference<BlueprintExtenderService> reference) {
+ final ServiceReference<BlueprintExtenderService> reference) {
blueprintExtenderService = reference.getBundle().getBundleContext().getService(reference);
bundleTracker.open();
LOG.debug("Got BlueprintExtenderService");
- restartService = new BlueprintContainerRestartServiceImpl(blueprintExtenderService);
+ restartService.setBlueprintExtenderService(blueprintExtenderService);
+
blueprintContainerRestartReg = context.registerService(
BlueprintContainerRestartService.class.getName(), restartService, new Hashtable<>());
}
@Override
- public void modifiedService(ServiceReference<BlueprintExtenderService> reference,
- BlueprintExtenderService service) {
+ public void modifiedService(final ServiceReference<BlueprintExtenderService> reference,
+ final BlueprintExtenderService service) {
+ }
+
+ @Override
+ public void removedService(final ServiceReference<BlueprintExtenderService> reference,
+ final BlueprintExtenderService service) {
+ }
+ });
+ blueprintExtenderServiceTracker.open();
+
+ quiesceParticipantTracker = new ServiceTracker<>(context, QuiesceParticipant.class.getName(),
+ new ServiceTrackerCustomizer<QuiesceParticipant, QuiesceParticipant>() {
+ @Override
+ public QuiesceParticipant addingService(
+ final ServiceReference<QuiesceParticipant> reference) {
+ quiesceParticipant = reference.getBundle().getBundleContext().getService(reference);
+
+ LOG.debug("Got QuiesceParticipant");
+
+ restartService.setQuiesceParticipant(quiesceParticipant);
+
+ return quiesceParticipant;
+ }
+
+ @Override
+ public void modifiedService(final ServiceReference<QuiesceParticipant> reference,
+ final QuiesceParticipant service) {
}
@Override
- public void removedService(ServiceReference<BlueprintExtenderService> reference,
- BlueprintExtenderService service) {
+ public void removedService(final ServiceReference<QuiesceParticipant> reference,
+ final QuiesceParticipant service) {
}
});
- serviceTracker.open();
+ quiesceParticipantTracker.open();
}
- private void registerNamespaceHandler(BundleContext context) {
+ private void registerNamespaceHandler(final BundleContext context) {
Dictionary<String, Object> props = new Hashtable<>();
props.put("osgi.service.blueprint.namespace", OpendaylightNamespaceHandler.NAMESPACE_1_0_0);
namespaceReg = context.registerService(NamespaceHandler.class.getName(),
new OpendaylightNamespaceHandler(), props);
}
- private void registerBlueprintEventHandler(BundleContext context) {
+ private void registerBlueprintEventHandler(final BundleContext context) {
Dictionary<String, Object> props = new Hashtable<>();
props.put(org.osgi.service.event.EventConstants.EVENT_TOPIC,
new String[]{EventConstants.TOPIC_CREATED, EventConstants.TOPIC_FAILURE});
* Implemented from BundleActivator.
*/
@Override
- public void stop(BundleContext context) {
+ public void stop(final BundleContext context) {
bundleTracker.close();
- serviceTracker.close();
+ blueprintExtenderServiceTracker.close();
+ quiesceParticipantTracker.close();
AriesFrameworkUtil.safeUnregisterService(eventHandlerReg);
AriesFrameworkUtil.safeUnregisterService(namespaceReg);
* Implemented from SynchronousBundleListener.
*/
@Override
- public void bundleChanged(BundleEvent event) {
+ public void bundleChanged(final BundleEvent event) {
// If the system bundle (id 0) is stopping, do an orderly shutdown of all blueprint containers. On
// shutdown the system bundle is stopped first.
- if(event.getBundle().getBundleId() == SYSTEM_BUNDLE_ID && event.getType() == BundleEvent.STOPPING) {
+ if (event.getBundle().getBundleId() == SYSTEM_BUNDLE_ID && event.getType() == BundleEvent.STOPPING) {
shutdownAllContainers();
}
}
* Implemented from BundleActivator.
*/
@Override
- public Bundle addingBundle(Bundle bundle, BundleEvent event) {
+ public Bundle addingBundle(final Bundle bundle, final BundleEvent event) {
modifiedBundle(bundle, event, bundle);
return bundle;
}
/**
- * Implemented from BundleActivator.
+ * Implemented from BundleTrackerCustomizer.
*/
@Override
- public void modifiedBundle(Bundle bundle, BundleEvent event, Bundle object) {
- if(shuttingDown) {
+ public void modifiedBundle(final Bundle bundle, final BundleEvent event, final Bundle object) {
+ if (shuttingDown) {
return;
}
- if(bundle.getState() == Bundle.ACTIVE) {
+ if (bundle.getState() == Bundle.ACTIVE) {
List<Object> paths = findBlueprintPaths(bundle);
- if(!paths.isEmpty()) {
+ if (!paths.isEmpty()) {
LOG.info("Creating blueprint container for bundle {} with paths {}", bundle, paths);
blueprintExtenderService.createContainer(bundle, paths);
}
/**
- * Implemented from BundleActivator.
+ * Implemented from BundleTrackerCustomizer.
*/
@Override
- public void removedBundle(Bundle bundle, BundleEvent event, Bundle object) {
+ public void removedBundle(final Bundle bundle, final BundleEvent event, final Bundle object) {
// BlueprintExtenderService will handle this.
}
/**
* Implemented from EventHandler to listen for blueprint events.
*
- * @param event
+ * @param event the event to handle
*/
@Override
- public void handleEvent(Event event) {
- if(EventConstants.TOPIC_CREATED.equals(event.getTopic())) {
+ public void handleEvent(final Event event) {
+ if (EventConstants.TOPIC_CREATED.equals(event.getTopic())) {
LOG.info("Blueprint container for bundle {} was successfully created",
event.getProperty(EventConstants.BUNDLE));
- } else if(EventConstants.TOPIC_FAILURE.equals(event.getTopic())) {
+ } else if (EventConstants.TOPIC_FAILURE.equals(event.getTopic())) {
// If the container timed out waiting for dependencies, we'll destroy it and start it again. This
// is indicated via a non-null DEPENDENCIES property containing the missing dependencies. The
// default timeout is 5 min and ideally we would set this to infinite but the timeout can only
// be set at the bundle level in the manifest - there's no way to set it globally.
- if(event.getProperty(EventConstants.DEPENDENCIES) != null) {
+ if (event.getProperty(EventConstants.DEPENDENCIES) != null) {
Bundle bundle = (Bundle) event.getProperty(EventConstants.BUNDLE);
List<Object> paths = findBlueprintPaths(bundle);
- if(!paths.isEmpty()) {
+ if (!paths.isEmpty()) {
LOG.warn("Blueprint container for bundle {} timed out waiting for dependencies - restarting it",
event.getProperty(EventConstants.BUNDLE));
}
@SuppressWarnings({ "rawtypes", "unchecked" })
- static List<Object> findBlueprintPaths(Bundle bundle) {
- Enumeration<?> e = bundle.findEntries(BLUEPRINT_FILE_PATH, BLUEPRINT_FLE_PATTERN, false);
- if(e == null) {
+ static List<Object> findBlueprintPaths(final Bundle bundle) {
+ Enumeration<?> rntries = bundle.findEntries(BLUEPRINT_FILE_PATH, BLUEPRINT_FLE_PATTERN, false);
+ if (rntries == null) {
return Collections.emptyList();
} else {
- return Collections.list((Enumeration)e);
+ return Collections.list((Enumeration)rntries);
}
}
// Close all CSS modules first.
ConfigSystemService configSystem = getOSGiService(ConfigSystemService.class);
- if(configSystem != null) {
+ if (configSystem != null) {
configSystem.closeAllConfigModules();
}
LOG.info("Shutting down all blueprint containers...");
Collection<Bundle> containerBundles = new HashSet<>(Arrays.asList(bundleContext.getBundles()));
- while(!containerBundles.isEmpty()) {
+ while (!containerBundles.isEmpty()) {
// For each iteration of getBundlesToDestroy, as containers are destroyed, other containers become
// eligible to be destroyed. We loop until we've destroyed them all.
- for(Bundle bundle : getBundlesToDestroy(containerBundles)) {
+ for (Bundle bundle : getBundlesToDestroy(containerBundles)) {
containerBundles.remove(bundle);
BlueprintContainer container = blueprintExtenderService.getContainer(bundle);
- if(container != null) {
+ if (container != null) {
blueprintExtenderService.destroyContainer(bundle, container);
}
}
LOG.info("Shutdown of blueprint containers complete");
}
- private List<Bundle> getBundlesToDestroy(Collection<Bundle> containerBundles) {
- List<Bundle> bundlesToDestroy = new ArrayList<Bundle>();
+ private List<Bundle> getBundlesToDestroy(final Collection<Bundle> containerBundles) {
+ List<Bundle> bundlesToDestroy = new ArrayList<>();
// Find all container bundles that either have no registered services or whose services are no
// longer in use.
- for(Bundle bundle : containerBundles) {
+ for (Bundle bundle : containerBundles) {
ServiceReference<?>[] references = bundle.getRegisteredServices();
int usage = 0;
- if(references != null) {
- for(ServiceReference<?> reference : references) {
+ if (references != null) {
+ for (ServiceReference<?> reference : references) {
usage += getServiceUsage(reference);
}
}
LOG.debug("Usage for bundle {} is {}", bundle, usage);
- if(usage == 0) {
+ if (usage == 0) {
bundlesToDestroy.add(bundle);
}
}
- if(!bundlesToDestroy.isEmpty()) {
- Collections.sort(bundlesToDestroy, new Comparator<Bundle>() {
- @Override
- public int compare(Bundle b1, Bundle b2) {
- return (int) (b2.getLastModified() - b1.getLastModified());
- }
- });
+ if (!bundlesToDestroy.isEmpty()) {
+ Collections.sort(bundlesToDestroy, (b1, b2) -> (int) (b2.getLastModified() - b1.getLastModified()));
LOG.debug("Selected bundles {} for destroy (no services in use)", bundlesToDestroy);
} else {
// is likely the safest to destroy at this point.
ServiceReference<?> ref = null;
- for(Bundle bundle : containerBundles) {
+ for (Bundle bundle : containerBundles) {
ServiceReference<?>[] references = bundle.getRegisteredServices();
- if(references == null) {
+ if (references == null) {
continue;
}
- for(ServiceReference<?> reference : references) {
+ for (ServiceReference<?> reference : references) {
// We did check the service usage above but it's possible the usage has changed since
// then,
- if(getServiceUsage(reference) == 0) {
+ if (getServiceUsage(reference) == 0) {
continue;
}
// Choose 'reference' if it has a lower service ranking or, if the rankings are equal
// which is usually the case, if it has a higher service ID. For the latter the < 0
// check looks backwards but that's how ServiceReference#compareTo is documented to work.
- if(ref == null || reference.compareTo(ref) < 0) {
+ if (ref == null || reference.compareTo(ref) < 0) {
LOG.debug("Currently selecting bundle {} for destroy (with reference {})", bundle, reference);
ref = reference;
}
}
}
- if(ref != null) {
+ if (ref != null) {
bundlesToDestroy.add(ref.getBundle());
}
return bundlesToDestroy;
}
- private static int getServiceUsage(ServiceReference<?> ref) {
+ private static int getServiceUsage(final ServiceReference<?> ref) {
Bundle[] usingBundles = ref.getUsingBundles();
return usingBundles != null ? usingBundles.length : 0;
}
- private <T> T getOSGiService(Class<T> serviceInterface) {
+ private <T> T getOSGiService(final Class<T> serviceInterface) {
try {
ServiceReference<T> serviceReference = bundleContext.getServiceReference(serviceInterface);
- if(serviceReference == null) {
+ if (serviceReference == null) {
LOG.warn("{} service reference not found", serviceInterface.getSimpleName());
return null;
}
T service = bundleContext.getService(serviceReference);
- if(service == null) {
+ if (service == null) {
// This could happen on shutdown if the service was already unregistered so we log as debug.
LOG.debug("{} service instance was not found", serviceInterface.getSimpleName());
}
return service;
- } catch(IllegalStateException e) {
+ } catch (final IllegalStateException e) {
// This is thrown if the BundleContext is no longer valid which is possible on shutdown so we
// log as debug.
LOG.debug("Error obtaining OSGi service {}", serviceInterface.getSimpleName(), e);
Code Review / controller.git / blobdiff