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