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

   1 /*
   2  * Copyright (c) 2014 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.protocol.data.change.counter;
  10
  11 import com.google.common.util.concurrent.FutureCallback;
  12 import com.google.common.util.concurrent.MoreExecutors;
  13 import java.util.Collection;
  14 import java.util.concurrent.ExecutionException;
  15 import java.util.concurrent.atomic.AtomicBoolean;
  16 import java.util.concurrent.atomic.LongAdder;
  17 import org.opendaylight.mdsal.binding.api.ClusteredDataTreeChangeListener;
  18 import org.opendaylight.mdsal.binding.api.DataBroker;
  19 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  20 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  21 import org.opendaylight.mdsal.binding.api.Transaction;
  22 import org.opendaylight.mdsal.binding.api.TransactionChain;
  23 import org.opendaylight.mdsal.binding.api.TransactionChainListener;
  24 import org.opendaylight.mdsal.binding.api.WriteTransaction;
  25 import org.opendaylight.mdsal.common.api.CommitInfo;
  26 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.DataChangeCounter;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.data.change.counter.Counter;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.data.change.counter.CounterBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.data.change.counter.rev160315.data.change.counter.CounterKey;
  31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  32 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  33 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  34 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  35 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  36 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 final class TopologyDataChangeCounter implements ClusteredDataTreeChangeListener<Topology>,
  41     TransactionChainListener, AutoCloseable {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(TopologyDataChangeCounter.class);
  44
  45     private final DataBroker dataBroker;
  46     private final String counterId;
  47     private final InstanceIdentifier<Counter> counterInstanceId;
  48     private final LongAdder count = new LongAdder();
  49     private final ListenerRegistration<TopologyDataChangeCounter> registration;
  50     private final AtomicBoolean closed = new AtomicBoolean(false);
  51     private TransactionChain transactionChain;
  52
  53     TopologyDataChangeCounter(final DataBroker dataBroker, final String counterId, final String topologyName) {
  54         this.dataBroker = dataBroker;
  55         this.transactionChain = this.dataBroker.createTransactionChain(this);
  56         this.counterId = counterId;
  57         this.counterInstanceId = InstanceIdentifier.builder(DataChangeCounter.class)
  58                 .child(Counter.class, new CounterKey(this.counterId)).build();
  59         putCount(this.count.longValue());
  60         final InstanceIdentifier<Topology> topoIId = InstanceIdentifier.builder(NetworkTopology.class)
  61                 .child(Topology.class, new TopologyKey(new TopologyId(topologyName))).build();
  62         this.registration = this.dataBroker.registerDataTreeChangeListener(
  63             DataTreeIdentifier.create(LogicalDatastoreType.OPERATIONAL, topoIId), this);
  64         LOG.debug("Data change counter {} initiated", this.counterId);
  65     }
  66
  67     @Override
  68     public synchronized void onDataTreeChanged(final Collection<DataTreeModification<Topology>> changes) {
  69         this.count.increment();
  70         final long inc = this.count.sum();
  71         LOG.debug("Data change #{} for counter {}", inc, this.counterId);
  72         putCount(inc);
  73     }
  74
  75     @Override
  76     public synchronized void close() {
  77         this.registration.close();
  78         final WriteTransaction wTx = this.dataBroker.newWriteOnlyTransaction();
  79         wTx.delete(LogicalDatastoreType.OPERATIONAL, this.counterInstanceId);
  80         try {
  81             wTx.commit().get();
  82         } catch (final ExecutionException | InterruptedException except) {
  83             LOG.warn("Error on remove data change counter {}", this.counterId, except);
  84         }
  85         this.transactionChain.close();
  86         LOG.debug("Data change counter {} removed", this.counterId);
  87     }
  88
  89     private void putCount(final long totalCount) {
  90         final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
  91         final Counter counter = new CounterBuilder().setId(this.counterId).setCount(totalCount).build();
  92         wTx.put(LogicalDatastoreType.OPERATIONAL, this.counterInstanceId, counter);
  93         wTx.commit().addCallback(new FutureCallback<CommitInfo>() {
  94             @Override
  95             public void onSuccess(final CommitInfo result) {
  96                 LOG.debug("Data change count update stored");
  97             }
  98
  99             @Override
 100             public void onFailure(final Throwable trw) {
 101                 LOG.error("Failed to store Data change count");
 102             }
 103         }, MoreExecutors.directExecutor());
 104     }
 105
 106     @Override
 107     public synchronized void onTransactionChainFailed(final TransactionChain chain, final Transaction transaction,
 108         final Throwable cause) {
 109         LOG.warn("Transaction chain failure. Transaction: {}", transaction, cause);
 110         if (!closed.get()) {
 111             this.transactionChain.close();
 112             this.transactionChain = dataBroker.createTransactionChain(this);
 113         }
 114     }
 115
 116     @Override
 117     public synchronized void onTransactionChainSuccessful(final TransactionChain chain) {
 118         LOG.debug("Transaction chain successful. {}", chain);
 119     }
 120 }