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 edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  16 import java.util.HashMap;
  17 import java.util.Map;
  18 import java.util.Set;
  19 import java.util.TimerTask;
  20 import java.util.concurrent.ConcurrentHashMap;
  21 import java.util.concurrent.Executors;
  22 import java.util.concurrent.ScheduledExecutorService;
  23 import java.util.concurrent.ScheduledFuture;
  24 import java.util.concurrent.atomic.AtomicBoolean;
  25 import org.checkerframework.checker.lock.qual.GuardedBy;
  26 import org.eclipse.jdt.annotation.NonNull;
  27 import org.opendaylight.bgpcep.pcep.topology.spi.stats.TopologySessionStatsRegistry;
  28 import org.opendaylight.mdsal.binding.api.DataBroker;
  29 import org.opendaylight.mdsal.binding.api.Transaction;
  30 import org.opendaylight.mdsal.binding.api.TransactionChain;
  31 import org.opendaylight.mdsal.binding.api.TransactionChainListener;
  32 import org.opendaylight.mdsal.binding.api.WriteTransaction;
  33 import org.opendaylight.mdsal.common.api.CommitInfo;
  34 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.PcepSessionState;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.pcep.session.state.grouping.PcepSessionStateBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.stats.rev181109.PcepTopologyNodeStatsAug;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.stats.rev181109.PcepTopologyNodeStatsAugBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  40 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  41 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  42 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 public final class TopologyStatsProviderImpl implements TransactionChainListener,
  47         TopologySessionStatsRegistry, AutoCloseable {
  48
  49     private static final Logger LOG = LoggerFactory.getLogger(TopologyStatsProviderImpl.class);
  50     @GuardedBy("this")
  51     private final Map<KeyedInstanceIdentifier<Node, NodeKey>, PcepSessionState> statsMap = new HashMap<>();
  52     private final Set<KeyedInstanceIdentifier<Node, NodeKey>> statsPendingDelete = ConcurrentHashMap.newKeySet();
  53     private final DataBroker dataBroker;
  54     private final int timeout;
  55     private TransactionChain transactionChain;
  56     private ScheduledFuture<?> scheduleTask;
  57     private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
  58     private final AtomicBoolean closed = new AtomicBoolean(false);
  59
  60     public TopologyStatsProviderImpl(final @NonNull DataBroker dataBroker, final int timeout) {
  61         this.dataBroker = requireNonNull(dataBroker);
  62         this.timeout = timeout;
  63     }
  64
  65     public synchronized void init() {
  66         LOG.info("Initializing TopologyStatsProvider service.");
  67         this.transactionChain = this.dataBroker.createMergingTransactionChain(this);
  68         final TimerTask task = new TimerTask() {
  69             @Override
  70             public void run() {
  71                 updatePcepStats();
  72             }
  73         };
  74
  75         this.scheduleTask = this.scheduler.scheduleAtFixedRate(task, 0, this.timeout, SECONDS);
  76     }
  77
  78     @SuppressWarnings("checkstyle:IllegalCatch")
  79     @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
  80             justification = "https://github.com/spotbugs/spotbugs/issues/811")
  81     private synchronized void updatePcepStats() {
  82         final WriteTransaction tx = TopologyStatsProviderImpl.this.transactionChain.newWriteOnlyTransaction();
  83
  84         try {
  85             for (final Map.Entry<KeyedInstanceIdentifier<Node, NodeKey>, PcepSessionState> entry
  86                     : this.statsMap.entrySet()) {
  87                 if (this.statsPendingDelete.contains(entry.getKey())) {
  88                     continue;
  89                 }
  90                 final PcepTopologyNodeStatsAug nodeStatsAug = new PcepTopologyNodeStatsAugBuilder()
  91                         .setPcepSessionState(new PcepSessionStateBuilder(entry.getValue()).build()).build();
  92                 final InstanceIdentifier<PcepTopologyNodeStatsAug> statId =
  93                         entry.getKey().augmentation(PcepTopologyNodeStatsAug.class);
  94                 tx.put(LogicalDatastoreType.OPERATIONAL, statId, nodeStatsAug);
  95             }
  96             tx.commit().addCallback(new FutureCallback<CommitInfo>() {
  97                 @Override
  98                 public void onSuccess(final CommitInfo result) {
  99                     LOG.debug("Successfully committed Topology stats update");
 100                 }
 101
 102                 @Override
 103                 public void onFailure(final Throwable ex) {
 104                     LOG.error("Failed to commit Topology stats update", ex);
 105                 }
 106             }, MoreExecutors.directExecutor());
 107         } catch (final Exception e) {
 108             LOG.warn("Failed to prepare Tx for PCEP stats update", e);
 109             tx.cancel();
 110         }
 111     }
 112
 113     @Override
 114     public synchronized void close() throws Exception {
 115         if (closed.compareAndSet(false, true)) {
 116             LOG.info("Closing TopologyStatsProvider service.");
 117             this.scheduleTask.cancel(true);
 118             final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
 119             for (final KeyedInstanceIdentifier<Node, NodeKey> statId : this.statsMap.keySet()) {
 120                 wTx.delete(LogicalDatastoreType.OPERATIONAL, statId);
 121             }
 122             wTx.commit().get();
 123             this.statsMap.clear();
 124             this.transactionChain.close();
 125             this.scheduler.shutdown();
 126         }
 127     }
 128
 129     @Override
 130     public synchronized void onTransactionChainFailed(final TransactionChain chain,
 131             final Transaction transaction, final Throwable cause) {
 132         LOG.error("Transaction chain {} failed for tx {}",
 133                 chain, transaction != null ? transaction.getIdentifier() : null, cause);
 134
 135         if (!closed.get()) {
 136             transactionChain.close();
 137             transactionChain = dataBroker.createMergingTransactionChain(this);
 138         }
 139     }
 140
 141     @Override
 142     public synchronized void onTransactionChainSuccessful(final TransactionChain chain) {
 143         LOG.debug("Transaction chain {} successful.", chain);
 144     }
 145
 146     @Override
 147     public synchronized void bind(final KeyedInstanceIdentifier<Node, NodeKey> nodeId,
 148             final PcepSessionState sessionState) {
 149         this.statsMap.put(nodeId, sessionState);
 150     }
 151
 152     @Override
 153     public synchronized void unbind(final KeyedInstanceIdentifier<Node, NodeKey> nodeId) {
 154         this.statsMap.remove(nodeId);
 155         this.statsPendingDelete.add(nodeId);
 156         final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
 157         wTx.delete(LogicalDatastoreType.OPERATIONAL, nodeId);
 158         wTx.commit().addCallback(new FutureCallback<CommitInfo>() {
 159             @Override
 160             public void onSuccess(final CommitInfo result) {
 161                 LOG.debug("Successfully removed Pcep Node stats {}.", nodeId.getKey().getNodeId());
 162                 TopologyStatsProviderImpl.this.statsPendingDelete.remove(nodeId);
 163             }
 164
 165             @Override
 166             public void onFailure(final Throwable ex) {
 167                 LOG.warn("Failed to remove Pcep Node stats {}.", nodeId.getKey().getNodeId(), ex);
 168                 TopologyStatsProviderImpl.this.statsPendingDelete.remove(nodeId);
 169             }
 170         }, MoreExecutors.directExecutor());
 171     }
 172 }