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