opendaylight/config/config-persister-feature-adapter/src/main/java/org/opendaylight/controller/configpusherfeature/internal/FeatureServiceCustomizer.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.controller.configpusherfeature.internal;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.collect.Sets;
  12 import java.util.Set;
  13 import org.apache.karaf.features.Feature;
  14 import org.apache.karaf.features.FeaturesListener;
  15 import org.apache.karaf.features.FeaturesService;
  16 import org.opendaylight.controller.config.persist.api.ConfigPusher;
  17 import org.opendaylight.controller.config.persist.storage.file.xml.XmlFileStorageAdapter;
  18 import org.osgi.framework.BundleContext;
  19 import org.osgi.framework.ServiceReference;
  20 import org.osgi.framework.ServiceRegistration;
  21 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  22
  23 public class FeatureServiceCustomizer implements ServiceTrackerCustomizer<FeaturesService, FeaturesService>, AutoCloseable {
  24     private ConfigPusher configPusher = null;
  25     private ServiceRegistration<?> registration;
  26
  27     FeatureServiceCustomizer(final ConfigPusher c) {
  28         configPusher = c;
  29     }
  30
  31     @Override
  32     public FeaturesService addingService(final ServiceReference<FeaturesService> reference) {
  33         BundleContext bc = reference.getBundle().getBundleContext();
  34         final FeaturesService featureService = bc.getService(reference);
  35         final Optional<XmlFileStorageAdapter> currentPersister = XmlFileStorageAdapter.getInstance();
  36
  37         if(XmlFileStorageAdapter.getInstance().isPresent()) {
  38             final Set<String> installedFeatureIds = Sets.newHashSet();
  39             for (final Feature installedFeature : featureService.listInstalledFeatures()) {
  40                 installedFeatureIds.add(installedFeature.getId());
  41             }
  42
  43             currentPersister.get().setFeaturesService(() -> installedFeatureIds);
  44         }
  45         ConfigFeaturesListener configFeaturesListener = new ConfigFeaturesListener(configPusher, featureService);
  46         registration = bc.registerService(FeaturesListener.class.getCanonicalName(), configFeaturesListener, null);
  47         return featureService;
  48     }
  49
  50     @Override
  51     public void modifiedService(final ServiceReference<FeaturesService> reference,
  52             final FeaturesService service) {
  53         // we don't care if the properties change
  54     }
  55
  56     @Override
  57     public void removedService(final ServiceReference<FeaturesService> reference,
  58             final FeaturesService service) {
  59         close();
  60     }
  61
  62     @Override
  63     public void close() {
  64         if(registration != null) {
  65             registration.unregister();
  66             registration = null;
  67         }
  68     }
  69 }