data-change-counter/src/main/java/org/opendaylight/protocol/data/change/counter/TopologyDataChangeCounterDeployer.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies s.r.o. 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.protocol.data.change.counter;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.Collection;
  13 import java.util.HashMap;
  14 import java.util.Map;
  15 import javax.annotation.PreDestroy;
  16 import javax.inject.Inject;
  17 import javax.inject.Singleton;
  18 import org.checkerframework.checker.lock.qual.GuardedBy;
  19 import org.eclipse.jdt.annotation.NonNull;
  20 import org.opendaylight.mdsal.binding.api.DataBroker;
  21 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
  22 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  23 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  24 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgpcep.data.change.counter.config.rev170424.DataChangeCounterConfig;
  26 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  27 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  28 import org.osgi.service.component.annotations.Activate;
  29 import org.osgi.service.component.annotations.Component;
  30 import org.osgi.service.component.annotations.Deactivate;
  31 import org.osgi.service.component.annotations.Reference;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 @Singleton
  36 @Component(service = { })
  37 public final class TopologyDataChangeCounterDeployer implements DataTreeChangeListener<DataChangeCounterConfig>,
  38         AutoCloseable {
  39     private static final Logger LOG = LoggerFactory.getLogger(TopologyDataChangeCounterDeployer.class);
  40     private static final InstanceIdentifier<DataChangeCounterConfig> DATA_CHANGE_COUNTER_IID =
  41             InstanceIdentifier.builder(DataChangeCounterConfig.class).build();
  42
  43     private final @NonNull DataBroker dataBroker;
  44     @GuardedBy("this")
  45     private final Map<String, TopologyDataChangeCounter> counters = new HashMap<>();
  46     @GuardedBy("this")
  47     private ListenerRegistration<TopologyDataChangeCounterDeployer> registration;
  48
  49     @Inject
  50     @Activate
  51     public TopologyDataChangeCounterDeployer(@Reference final DataBroker dataBroker) {
  52         this.dataBroker = requireNonNull(dataBroker);
  53         registration = dataBroker.registerDataTreeChangeListener(
  54             DataTreeIdentifier.create(LogicalDatastoreType.CONFIGURATION, DATA_CHANGE_COUNTER_IID), this);
  55         LOG.info("Data change counter Deployer started");
  56     }
  57
  58     @Deactivate
  59     @PreDestroy
  60     @Override
  61     public synchronized void close() {
  62         if (registration != null) {
  63             registration.close();
  64             registration = null;
  65         }
  66         counters.values().forEach(TopologyDataChangeCounter::close);
  67         counters.clear();
  68         LOG.info("Data change counter Deployer stopped");
  69     }
  70
  71     @Override
  72     public synchronized void onDataTreeChanged(
  73             final Collection<DataTreeModification<DataChangeCounterConfig>> changes) {
  74         for (var change : changes) {
  75             final var rootNode = change.getRootNode();
  76             switch (rootNode.getModificationType()) {
  77                 case DELETE:
  78                     deleteCounterChange(rootNode.getDataBefore().getCounterId());
  79                     break;
  80                 case SUBTREE_MODIFIED:
  81                 case WRITE:
  82                     final var counterConfig = rootNode.getDataAfter();
  83                     handleCounterChange(counterConfig.getCounterId(), counterConfig.getTopologyName());
  84                     break;
  85                 default:
  86                     LOG.error("Unhandled modification Type: {}", rootNode.getModificationType());
  87                     break;
  88             }
  89         }
  90     }
  91
  92     private synchronized void deleteCounterChange(final String counterId) {
  93         final var oldCounter = counters.remove(counterId);
  94         if (oldCounter != null) {
  95             LOG.info("Data change counter Deployer deleted: {}", counterId);
  96             oldCounter.close();
  97         }
  98     }
  99
 100     private synchronized void handleCounterChange(final String counterId, final String topologyName) {
 101         deleteCounterChange(counterId);
 102         LOG.info("Data change counter Deployer created: {} / {}", counterId, topologyName);
 103         counters.put(counterId, new TopologyDataChangeCounter(dataBroker, counterId, topologyName));
 104     }
 105 }