pcep/topology/topology-stats/src/main/java/org/opendaylight/bgpcep/pcep/topology/stats/provider/TopologyStatsProviderImpl.java

   1 /*
   2  * Copyright (c) 2017 AT&T Intellectual Property. 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.bgpcep.pcep.topology.stats.provider;
   9
  10 import static java.util.Objects.requireNonNull;
  11 import static java.util.concurrent.TimeUnit.SECONDS;
  12
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.MoreExecutors;
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import java.util.TimerTask;
  18 import java.util.concurrent.ExecutionException;
  19 import java.util.concurrent.Executors;
  20 import java.util.concurrent.ScheduledExecutorService;
  21 import java.util.concurrent.ScheduledFuture;
  22 import java.util.concurrent.atomic.AtomicBoolean;
  23 import org.checkerframework.checker.lock.qual.GuardedBy;
  24 import org.eclipse.jdt.annotation.NonNull;
  25 import org.opendaylight.bgpcep.pcep.topology.spi.stats.TopologySessionStatsRegistry;
  26 import org.opendaylight.mdsal.binding.api.DataBroker;
  27 import org.opendaylight.mdsal.binding.api.Transaction;
  28 import org.opendaylight.mdsal.binding.api.TransactionChain;
  29 import org.opendaylight.mdsal.binding.api.TransactionChainListener;
  30 import org.opendaylight.mdsal.binding.api.WriteTransaction;
  31 import org.opendaylight.mdsal.common.api.CommitInfo;
  32 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.PcepSessionState;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.pcep.session.state.grouping.PcepSessionStateBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.stats.rev181109.PcepTopologyNodeStatsAug;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.stats.rev181109.PcepTopologyNodeStatsAugBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  38 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  39 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  40 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  41 import org.slf4j.Logger;
  42 import org.slf4j.LoggerFactory;
  43
  44 public final class TopologyStatsProviderImpl implements TransactionChainListener,
  45         TopologySessionStatsRegistry, AutoCloseable {
  46
  47     private static final Logger LOG = LoggerFactory.getLogger(TopologyStatsProviderImpl.class);
  48     @GuardedBy("this")
  49     private final Map<KeyedInstanceIdentifier<Node, NodeKey>, PcepSessionState> statsMap = new HashMap<>();
  50     private final DataBroker dataBroker;
  51     private final int timeout;
  52     private TransactionChain transactionChain;
  53     private ScheduledFuture<?> scheduleTask;
  54     private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
  55     private final AtomicBoolean closed = new AtomicBoolean(false);
  56
  57     public TopologyStatsProviderImpl(final @NonNull DataBroker dataBroker, final int timeout) {
  58         this.dataBroker = requireNonNull(dataBroker);
  59         this.timeout = timeout;
  60     }
  61
  62     public synchronized void init() {
  63         LOG.info("Initializing TopologyStatsProvider service.");
  64         this.transactionChain = this.dataBroker.createMergingTransactionChain(this);
  65         final TimerTask task = new TimerTask() {
  66             @Override
  67             public void run() {
  68                 updatePcepStats();
  69             }
  70         };
  71
  72         this.scheduleTask = this.scheduler.scheduleAtFixedRate(task, 0, this.timeout, SECONDS);
  73     }
  74
  75     @SuppressWarnings("checkstyle:IllegalCatch")
  76     private synchronized void updatePcepStats() {
  77         final WriteTransaction tx = TopologyStatsProviderImpl.this.transactionChain.newWriteOnlyTransaction();
  78
  79         try {
  80             for (final Map.Entry<KeyedInstanceIdentifier<Node, NodeKey>, PcepSessionState> entry
  81                     : this.statsMap.entrySet()) {
  82                 final PcepTopologyNodeStatsAug nodeStatsAug = new PcepTopologyNodeStatsAugBuilder()
  83                         .setPcepSessionState(new PcepSessionStateBuilder(entry.getValue()).build()).build();
  84                 final InstanceIdentifier<PcepTopologyNodeStatsAug> statId =
  85                         entry.getKey().augmentation(PcepTopologyNodeStatsAug.class);
  86                 tx.put(LogicalDatastoreType.OPERATIONAL, statId, nodeStatsAug);
  87             }
  88             tx.commit().addCallback(new FutureCallback<CommitInfo>() {
  89                 @Override
  90                 public void onSuccess(final CommitInfo result) {
  91                     LOG.debug("Successfully committed Topology stats update");
  92                 }
  93
  94                 @Override
  95                 public void onFailure(final Throwable ex) {
  96                     LOG.error("Failed to commit Topology stats update", ex);
  97                 }
  98             }, MoreExecutors.directExecutor());
  99         } catch (final Exception e) {
 100             LOG.warn("Failed to prepare Tx for BGP stats update", e);
 101             tx.cancel();
 102         }
 103     }
 104
 105     @Override
 106     public synchronized void close() throws Exception {
 107         if (closed.compareAndSet(false, true)) {
 108             LOG.info("Closing TopologyStatsProvider service.");
 109             this.scheduleTask.cancel(true);
 110             final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
 111             for (final KeyedInstanceIdentifier<Node, NodeKey> statId : this.statsMap.keySet()) {
 112                 wTx.delete(LogicalDatastoreType.OPERATIONAL, statId);
 113             }
 114             wTx.commit().get();
 115             this.statsMap.clear();
 116             this.transactionChain.close();
 117             this.scheduler.shutdown();
 118         }
 119     }
 120
 121     @Override
 122     public synchronized void onTransactionChainFailed(final TransactionChain chain,
 123             final Transaction transaction, final Throwable cause) {
 124         LOG.error("Transaction chain {} failed for tx {}",
 125                 chain, transaction != null ? transaction.getIdentifier() : null, cause);
 126
 127         if (!closed.get()) {
 128             transactionChain.close();
 129             transactionChain = dataBroker.createMergingTransactionChain(this);
 130         }
 131     }
 132
 133     @Override
 134     public synchronized void onTransactionChainSuccessful(final TransactionChain chain) {
 135         LOG.debug("Transaction chain {} successful.", chain);
 136     }
 137
 138     @Override
 139     public synchronized void bind(final KeyedInstanceIdentifier<Node, NodeKey> nodeId,
 140             final PcepSessionState sessionState) {
 141         this.statsMap.put(nodeId, sessionState);
 142     }
 143
 144     @Override
 145     public synchronized void unbind(final KeyedInstanceIdentifier<Node, NodeKey> nodeId) {
 146         this.statsMap.remove(nodeId);
 147         final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
 148         wTx.delete(LogicalDatastoreType.OPERATIONAL, nodeId);
 149         try {
 150             wTx.commit().get();
 151         } catch (final InterruptedException | ExecutionException e) {
 152             LOG.warn("Failed to remove Pcep Node stats {}.", nodeId.getKey().getNodeId());
 153         }
 154     }
 155 }