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