opendaylight/config/config-persister-feature-adapter/src/main/java/org/opendaylight/controller/configpusherfeature/internal/ChildAwareFeatureWrapper.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.base.Preconditions;
  12 import java.util.LinkedHashSet;
  13 import java.util.List;
  14 import org.apache.felix.utils.version.VersionRange;
  15 import org.apache.felix.utils.version.VersionTable;
  16 import org.apache.karaf.features.Dependency;
  17 import org.apache.karaf.features.Feature;
  18 import org.apache.karaf.features.FeaturesService;
  19 import org.osgi.framework.Version;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 /*
  24  * Wrap a Feature for the purposes of extracting the FeatureConfigSnapshotHolders from
  25  * its underlying ConfigFileInfo's and those of its children recursively
  26  *
  27  * Delegates the the contained feature and provides additional methods.
  28  */
  29 public class ChildAwareFeatureWrapper extends AbstractFeatureWrapper implements Feature {
  30     private static final Logger LOG = LoggerFactory.getLogger(ChildAwareFeatureWrapper.class);
  31     private FeaturesService featuresService= null;
  32
  33     protected ChildAwareFeatureWrapper(Feature f) {
  34         // Don't use without a feature service
  35     }
  36
  37     /*
  38      * @param f Feature to wrap
  39      * @param s FeaturesService to look up dependencies
  40      */
  41     ChildAwareFeatureWrapper(Feature f, FeaturesService s) throws Exception {
  42         super(s.getFeature(f.getName(), f.getVersion()));
  43         Preconditions.checkNotNull(s, "FeatureWrapper requires non-null FeatureService in constructor");
  44         this.featuresService = s;
  45     }
  46
  47     protected FeaturesService getFeaturesService() {
  48         return featuresService;
  49     }
  50
  51     /*
  52      * Get FeatureConfigSnapshotHolders appropriate to feed to the config subsystem
  53      * from the underlying Feature Config files and those of its children recursively
  54      */
  55     public LinkedHashSet <? extends ChildAwareFeatureWrapper> getChildFeatures() throws Exception {
  56         List<Dependency> dependencies = feature.getDependencies();
  57         LinkedHashSet <ChildAwareFeatureWrapper> childFeatures = new LinkedHashSet<ChildAwareFeatureWrapper>();
  58         if(dependencies != null) {
  59             for(Dependency dependency: dependencies) {
  60                 Feature fi = extractFeatureFromDependency(dependency);
  61                 if(fi != null){
  62                     ChildAwareFeatureWrapper wrappedFeature = new ChildAwareFeatureWrapper(fi,featuresService);
  63                     childFeatures.add(wrappedFeature);
  64                 }
  65             }
  66         }
  67         return childFeatures;
  68     }
  69
  70     public LinkedHashSet<FeatureConfigSnapshotHolder> getFeatureConfigSnapshotHolders() throws Exception {
  71         LinkedHashSet <FeatureConfigSnapshotHolder> snapShotHolders = new LinkedHashSet<FeatureConfigSnapshotHolder>();
  72         for(ChildAwareFeatureWrapper c: getChildFeatures()) {
  73             for(FeatureConfigSnapshotHolder h: c.getFeatureConfigSnapshotHolders()) {
  74                 final Optional<FeatureConfigSnapshotHolder> featureConfigSnapshotHolder = getFeatureConfigSnapshotHolder(h.getFileInfo());
  75                 if(featureConfigSnapshotHolder.isPresent()) {
  76                     snapShotHolders.add(featureConfigSnapshotHolder.get());
  77                 }
  78             }
  79         }
  80         snapShotHolders.addAll(super.getFeatureConfigSnapshotHolders());
  81         return snapShotHolders;
  82     }
  83
  84     protected Feature extractFeatureFromDependency(Dependency dependency) throws Exception {
  85         Feature[] features = featuresService.listFeatures();
  86         VersionRange range = org.apache.karaf.features.internal.model.Feature.DEFAULT_VERSION.equals(dependency.getVersion())
  87                 ? VersionRange.ANY_VERSION : new VersionRange(dependency.getVersion(), true, true);
  88         Feature fi = null;
  89         for(Feature f: features) {
  90             if (f.getName().equals(dependency.getName())) {
  91                 Version v = VersionTable.getVersion(f.getVersion());
  92                 if (range.contains(v) &&
  93                     (fi == null || VersionTable.getVersion(fi.getVersion()).compareTo(v) < 0)) {
  94                     fi = f;
  95                     break;
  96                 }
  97             }
  98         }
  99         return fi;
 100     }
 101
 102 }