opendaylight/md-sal/clustered-data-store/implementation/src/main/java/org/opendaylight/controller/datastore/internal/ClusteredDataStoreManager.java

   1 /*
   2  * Copyright (c) 2013 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
   9 package org.opendaylight.controller.datastore.internal;
  10
  11 import java.util.Hashtable;
  12
  13 import com.google.common.base.Preconditions;
  14
  15 import org.opendaylight.controller.clustering.services.CacheConfigException;
  16 import org.opendaylight.controller.clustering.services.IClusterGlobalServices;
  17 import org.opendaylight.controller.datastore.ClusteredDataStore;
  18 import org.opendaylight.controller.md.sal.common.api.data.DataModification;
  19 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
  20 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
  21 import org.osgi.framework.BundleContext;
  22 import org.osgi.framework.ServiceReference;
  23 import org.osgi.util.tracker.ServiceTracker;
  24 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  25
  26 public class ClusteredDataStoreManager implements //
  27         ClusteredDataStore, //
  28         ServiceTrackerCustomizer<IClusterGlobalServices, IClusterGlobalServices>, //
  29         AutoCloseable {
  30
  31     private ClusteredDataStore clusteredDataStore = null;
  32     private IClusterGlobalServices clusterGlobalServices = null;
  33     private BundleContext context;
  34
  35     private ServiceReference<IClusterGlobalServices> firstClusterGlobalReference;
  36     private ServiceTracker<IClusterGlobalServices, IClusterGlobalServices> clusterTracker;
  37
  38     @Override
  39     public DataCommitTransaction<InstanceIdentifier, CompositeNode> requestCommit(
  40             DataModification<InstanceIdentifier, CompositeNode> modification) {
  41         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  42         return clusteredDataStore.requestCommit(modification);
  43     }
  44
  45     @Override
  46     public CompositeNode readOperationalData(InstanceIdentifier path) {
  47         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  48         return clusteredDataStore.readOperationalData(path);
  49     }
  50
  51     @Override
  52     public CompositeNode readConfigurationData(InstanceIdentifier path) {
  53         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  54         return clusteredDataStore.readConfigurationData(path);
  55     }
  56
  57     public Iterable<InstanceIdentifier> getStoredConfigurationPaths() {
  58         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  59         return clusteredDataStore.getStoredConfigurationPaths();
  60     }
  61
  62     public Iterable<InstanceIdentifier> getStoredOperationalPaths() {
  63         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  64         return clusteredDataStore.getStoredOperationalPaths();
  65     }
  66
  67     public boolean containsConfigurationPath(InstanceIdentifier path) {
  68         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  69         return clusteredDataStore.containsConfigurationPath(path);
  70     }
  71
  72     public boolean containsOperationalPath(InstanceIdentifier path) {
  73         Preconditions.checkState(clusteredDataStore != null, "clusteredDataStore cannot be null");
  74         return clusteredDataStore.containsOperationalPath(path);
  75     }
  76
  77     public void setClusterGlobalServices(IClusterGlobalServices clusterGlobalServices) {
  78         this.clusterGlobalServices = clusterGlobalServices;
  79         try {
  80             // Adding creation of the clustered data store in its own method
  81             // to make the method unit testable
  82             clusteredDataStore = createClusteredDataStore();
  83         } catch (CacheConfigException e) {
  84             throw new IllegalStateException("could not construct clusteredDataStore");
  85         }
  86     }
  87
  88     @Override
  89     public IClusterGlobalServices addingService(ServiceReference<IClusterGlobalServices> reference) {
  90         if (clusterGlobalServices == null) {
  91             setClusterGlobalServices(context.getService(reference));
  92             return clusterGlobalServices;
  93         }
  94         return null;
  95     }
  96
  97     @Override
  98     public void modifiedService(ServiceReference<IClusterGlobalServices> reference, IClusterGlobalServices service) {
  99
 100     }
 101
 102     @Override
 103     public void removedService(ServiceReference<IClusterGlobalServices> reference, IClusterGlobalServices service) {
 104         if (clusterGlobalServices == service) {
 105             clusterGlobalServices = null;
 106             clusteredDataStore = null;
 107         }
 108     }
 109
 110     public BundleContext getContext() {
 111         return context;
 112     }
 113
 114     public void setContext(BundleContext context) {
 115         this.context = context;
 116     }
 117
 118
 119     /**
 120      * Function called by the dependency manager when all the required
 121      * dependencies are satisfied
 122      *
 123      */
 124     public void start() {
 125         if (context != null) {
 126             clusterTracker = new ServiceTracker<>(context, IClusterGlobalServices.class, this);
 127             clusterTracker.open();
 128
 129             context.registerService(ClusteredDataStore.class, this, new Hashtable<String,Object>());
 130         }
 131     }
 132
 133     protected ClusteredDataStore createClusteredDataStore() throws CacheConfigException {
 134         return new ClusteredDataStoreImpl(clusterGlobalServices);
 135     }
 136
 137     @Override
 138     public void close() throws Exception {
 139         clusterTracker.close();
 140     }
 141 }