opendaylight/config/config-persister-feature4-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
  13 import java.util.Set;
  14
  15 import org.apache.karaf.features.Feature;
  16 import org.apache.karaf.features.FeaturesListener;
  17 import org.apache.karaf.features.FeaturesService;
  18 import org.opendaylight.controller.config.persist.api.ConfigPusher;
  19 import org.opendaylight.controller.config.persist.storage.file.xml.XmlFileStorageAdapter;
  20 import org.osgi.framework.BundleContext;
  21 import org.osgi.framework.ServiceReference;
  22 import org.osgi.framework.ServiceRegistration;
  23 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 public class FeatureServiceCustomizer implements ServiceTrackerCustomizer<FeaturesService, FeaturesService>, AutoCloseable {
  28     private static final Logger LOG = LoggerFactory.getLogger(FeatureServiceCustomizer.class);
  29     private ConfigPusher configPusher = null;
  30     private ServiceRegistration<?> registration;
  31
  32     FeatureServiceCustomizer(final ConfigPusher c) {
  33         configPusher = c;
  34     }
  35
  36     @Override
  37     public FeaturesService addingService(final ServiceReference<FeaturesService> reference) {
  38         BundleContext bc = reference.getBundle().getBundleContext();
  39         final FeaturesService featureService = bc.getService(reference);
  40         final Optional<XmlFileStorageAdapter> currentPersister = XmlFileStorageAdapter.getInstance();
  41
  42         if (XmlFileStorageAdapter.getInstance().isPresent()) {
  43             final Set<String> installedFeatureIds = Sets.newHashSet();
  44             try {
  45                 for (final Feature installedFeature : featureService.listInstalledFeatures()) {
  46                     installedFeatureIds.add(installedFeature.getId());
  47                 }
  48             } catch (final Exception e) {
  49                 LOG.error("Error listing installed features", e);
  50             }
  51
  52             currentPersister.get().setFeaturesService(() -> installedFeatureIds);
  53         }
  54         ConfigFeaturesListener configFeaturesListener = new ConfigFeaturesListener(configPusher, featureService);
  55         registration = bc.registerService(FeaturesListener.class.getCanonicalName(), configFeaturesListener, null);
  56         return featureService;
  57     }
  58
  59     @Override
  60     public void modifiedService(final ServiceReference<FeaturesService> reference,
  61                                 final FeaturesService service) {
  62         // we don't care if the properties change
  63     }
  64
  65     @Override
  66     public void removedService(final ServiceReference<FeaturesService> reference,
  67                                final FeaturesService service) {
  68         close();
  69     }
  70
  71     @Override
  72     public void close() {
  73         if (registration != null) {
  74             registration.unregister();
  75             registration = null;
  76         }
  77     }
  78 }