renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/sf/ClassifierDefinitionListener.java

   1 /*
   2  * Copyright (c) 2015 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.groupbasedpolicy.renderer.ofoverlay.sf;
  10
  11 import static com.google.common.base.Preconditions.checkNotNull;
  12
  13 import java.util.Collection;
  14
  15 import javax.annotation.Nonnull;
  16
  17 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  20 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  21 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  22 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  23 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  24 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OFOverlayRenderer;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.SubjectFeatureDefinitions;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.subject.feature.definitions.ClassifierDefinition;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.Renderers;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.Renderer;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.RendererKey;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.Capabilities;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.capabilities.SupportedClassifierDefinition;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.capabilities.SupportedClassifierDefinitionBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.capabilities.SupportedClassifierDefinitionKey;
  34 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  35 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 import com.google.common.util.concurrent.FutureCallback;
  40 import com.google.common.util.concurrent.Futures;
  41 import com.google.common.util.concurrent.MoreExecutors;
  42
  43 public class ClassifierDefinitionListener implements ClusteredDataTreeChangeListener<ClassifierDefinition>, AutoCloseable {
  44
  45     private static final Logger LOG = LoggerFactory.getLogger(ClassifierDefinitionListener.class);
  46     private static final InstanceIdentifier<Capabilities> RENDERER_CAPABILITIES_IID = InstanceIdentifier
  47         .builder(Renderers.class)
  48         .child(Renderer.class, new RendererKey(OFOverlayRenderer.RENDERER_NAME))
  49         .child(Capabilities.class)
  50         .build();
  51     private static final String PUT = "stored";
  52     private static final String DELETED = "removed";
  53
  54     private final DataBroker dataProvider;
  55     private final ListenerRegistration<ClassifierDefinitionListener> registration;
  56
  57     public ClassifierDefinitionListener(DataBroker dataProvider) {
  58         this.dataProvider = checkNotNull(dataProvider);
  59         registration =
  60                 dataProvider
  61                     .registerDataTreeChangeListener(
  62                             new DataTreeIdentifier<>(LogicalDatastoreType.CONFIGURATION, InstanceIdentifier
  63                                 .builder(SubjectFeatureDefinitions.class).child(ClassifierDefinition.class).build()),
  64                     this);
  65     }
  66
  67     @Override
  68     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<ClassifierDefinition>> changes) {
  69         for (DataTreeModification<ClassifierDefinition> change : changes) {
  70             DataObjectModification<ClassifierDefinition> rootNode = change.getRootNode();
  71
  72             switch (rootNode.getModificationType()) {
  73                 case WRITE:
  74                 case SUBTREE_MODIFIED:
  75                     ClassifierDefinition classifierDefinitionAfter = checkNotNull(rootNode.getDataAfter());
  76                     Classifier ourClassifier = SubjectFeatures.getClassifier(classifierDefinitionAfter.getId());
  77                     if (ourClassifier != null) {
  78                         SupportedClassifierDefinition supportedClassifierDefinition =
  79                                 createSupportedClassifierDefinition(ourClassifier);
  80                         WriteTransaction wTx = dataProvider.newWriteOnlyTransaction();
  81                         wTx.put(LogicalDatastoreType.OPERATIONAL, RENDERER_CAPABILITIES_IID
  82                             .child(SupportedClassifierDefinition.class, supportedClassifierDefinition.getKey()),
  83                                 supportedClassifierDefinition, true);
  84                         Futures.addCallback(wTx.submit(), logDebugResult(supportedClassifierDefinition.getKey(), PUT),
  85                             MoreExecutors.directExecutor());
  86                     }
  87                     break;
  88
  89                 case DELETE:
  90                     ClassifierDefinition classifierDefinitionBefore = checkNotNull(rootNode.getDataBefore());
  91                     ourClassifier = SubjectFeatures.getClassifier(classifierDefinitionBefore.getId());
  92                     if (ourClassifier != null) {
  93                         SupportedClassifierDefinitionKey supportedClassifierDefinitionKey =
  94                                 new SupportedClassifierDefinitionKey(ourClassifier.getId());
  95                         WriteTransaction wTx = dataProvider.newWriteOnlyTransaction();
  96                         wTx.delete(LogicalDatastoreType.OPERATIONAL, RENDERER_CAPABILITIES_IID
  97                             .child(SupportedClassifierDefinition.class, supportedClassifierDefinitionKey));
  98                         Futures.addCallback(wTx.submit(), logDebugResult(supportedClassifierDefinitionKey, DELETED),
  99                             MoreExecutors.directExecutor());
 100                     }
 101                     break;
 102             }
 103         }
 104     }
 105
 106     private SupportedClassifierDefinition createSupportedClassifierDefinition(Classifier classifier) {
 107         SupportedClassifierDefinitionBuilder scdBuilder =
 108                 new SupportedClassifierDefinitionBuilder().setClassifierDefinitionId(classifier.getId())
 109                     .setSupportedParameterValues(classifier.getSupportedParameterValues());
 110         if (classifier.getParent() != null) {
 111             scdBuilder.setParentClassifierDefinitionId(classifier.getParent().getId());
 112         }
 113         return scdBuilder.build();
 114     }
 115
 116     private FutureCallback<Void> logDebugResult(final SupportedClassifierDefinitionKey supportedClassifierDefinitionKey,
 117             final String putOrDeleted) {
 118         return new FutureCallback<Void>() {
 119
 120             @Override
 121             public void onSuccess(Void result) {
 122                 LOG.debug("Capability of renerer {} was {}: {}", OFOverlayRenderer.RENDERER_NAME.getValue(),
 123                         putOrDeleted, supportedClassifierDefinitionKey);
 124             }
 125
 126             @Override
 127             public void onFailure(@Nonnull Throwable t) {
 128                 LOG.error("Capability of renderer {} was NOT {}: {}", OFOverlayRenderer.RENDERER_NAME.getValue(),
 129                         putOrDeleted, supportedClassifierDefinitionKey, t);
 130             }
 131         };
 132     }
 133
 134     @Override
 135     public void close() throws Exception {
 136         if (registration != null)
 137             registration.close();
 138     }
 139 }