neutron-vpp-mapper/src/main/java/org/opendaylight/groupbasedpolicy/neutron/vpp/mapper/processors/NeutronListener.java

   1 /*
   2  * Copyright (c) 2016 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.neutron.vpp.mapper.processors;
  10
  11 import java.io.Closeable;
  12 import java.util.ArrayList;
  13 import java.util.Collection;
  14 import java.util.LinkedHashSet;
  15 import java.util.List;
  16 import java.util.Set;
  17 import java.util.concurrent.ExecutionException;
  18
  19 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  20 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  21 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  22 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  23 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  24 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  25 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  29 import org.opendaylight.yangtools.yang.binding.DataObject;
  30 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  31 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.PathArgument;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 import com.google.common.annotations.VisibleForTesting;
  36 import com.google.common.collect.Iterators;
  37 import com.google.common.collect.PeekingIterator;
  38
  39 public class NeutronListener implements ClusteredDataTreeChangeListener<Neutron>, Closeable {
  40
  41     private static final Logger LOG = LoggerFactory.getLogger(NeutronListener.class);
  42
  43     private final Set<MappingProvider<? extends DataObject>> dataChangeProviders = new LinkedHashSet<>();
  44     protected ListenerRegistration<NeutronListener> registeredListener;
  45
  46     public NeutronListener(DataBroker dataBroker, NodeId routingNode) {
  47         LOG.info("Routing node chosen in ODL is {}", routingNode);
  48         registerHandlersAndListeners(dataBroker, routingNode);
  49         registeredListener = dataBroker.registerDataTreeChangeListener(new DataTreeIdentifier<>(
  50                 LogicalDatastoreType.CONFIGURATION, InstanceIdentifier.builder(Neutron.class).build()), this);
  51     }
  52
  53     private void registerHandlersAndListeners(DataBroker dataBroker, NodeId routingNode) {
  54         PortHandler portHandler = new PortHandler(dataBroker, routingNode);
  55         dataChangeProviders.add(new PortAware(portHandler, dataBroker));
  56         dataChangeProviders.add(new NetworkAware(dataBroker));
  57         dataChangeProviders.add(new SubnetAware(dataBroker));
  58     }
  59
  60     @Override
  61     public void onDataTreeChanged(Collection<DataTreeModification<Neutron>> changes) {
  62         for (DataTreeModification<Neutron> change : changes) {
  63             DataObjectModification<Neutron> rootNode = change.getRootNode();
  64             for (MappingProvider<? extends DataObject> provider : dataChangeProviders) {
  65                 for (DataObjectModification<? extends DataObject> modDto : findModifiedData(provider, rootNode)) {
  66                     try {
  67                         processChangedData(modDto, modDto.getModificationType(), provider);
  68                     } catch (InterruptedException | ExecutionException e) {
  69                         LOG.error("Failed to process {} modification of node: {}. {}", modDto.getModificationType(),
  70                                 modDto.getIdentifier(), e.getStackTrace());
  71                     }
  72                 }
  73             }
  74         }
  75     }
  76
  77     List<DataObjectModification<? extends DataObject>> findModifiedData(MappingProvider<? extends DataObject> provider,
  78             DataObjectModification<Neutron> rootNode) {
  79         List<DataObjectModification<? extends DataObject>> modDtos = new ArrayList<>();
  80         PeekingIterator<PathArgument> pathArgs = Iterators.peekingIterator(provider.getNeutronDtoIid()
  81             .getPathArguments()
  82             .iterator());
  83         DataObjectModification<? extends DataObject> modifDto = rootNode;
  84         while (pathArgs.hasNext()) {
  85             pathArgs.next();
  86             for (DataObjectModification<? extends DataObject> childDto : modifDto.getModifiedChildren()) {
  87                 if (pathArgs.hasNext() && childDto.getDataType().equals(pathArgs.peek().getType())) {
  88                     if (childDto.getDataType().equals(provider.getNeutronDtoIid().getTargetType())) {
  89                         modDtos.add(childDto);
  90                     } else {
  91                         modifDto = childDto;
  92                         break;
  93                     }
  94                 }
  95             }
  96         }
  97         return modDtos;
  98     }
  99
 100     @SuppressWarnings("unchecked")
 101     <T extends DataObject> void processChangedData(DataObjectModification<?> dto, ModificationType m,
 102             MappingProvider<T> processor) throws InterruptedException, ExecutionException {
 103         switch (m) {
 104             case WRITE: {
 105                 if (dto.getDataBefore() != null) {
 106                     processor.processUpdatedNeutronDto((T) dto.getDataBefore(), (T) dto.getDataAfter());
 107                 } else {
 108                     processor.processCreatedNeutronDto((T) dto.getDataAfter());
 109                 }
 110                 break;
 111             }
 112             case SUBTREE_MODIFIED: {
 113                 processor.processUpdatedNeutronDto((T) dto.getDataBefore(), (T) dto.getDataAfter());
 114                 break;
 115             }
 116             case DELETE: {
 117                 processor.processDeletedNeutronDto((T) dto.getDataBefore());
 118                 break;
 119             }
 120         }
 121     }
 122
 123     @VisibleForTesting
 124     void clearDataChangeProviders() {
 125         dataChangeProviders.clear();
 126     }
 127
 128     @VisibleForTesting
 129     <T extends DataObject> void addDataChangeProvider(MappingProvider<T> t) {
 130         dataChangeProviders.add(t);
 131     }
 132
 133     @Override
 134     public void close() {
 135         registeredListener.close();
 136     }
 137 }