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