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
   9 package org.opendaylight.bgpcep.pcep.topology.stats.provider;
  10
  11 import static java.util.Objects.requireNonNull;
  12 import static java.util.concurrent.TimeUnit.SECONDS;
  13
  14 import com.google.common.util.concurrent.FutureCallback;
  15 import com.google.common.util.concurrent.MoreExecutors;
  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 javax.annotation.Nonnull;
  25 import javax.annotation.concurrent.GuardedBy;
  26 import org.opendaylight.bgpcep.pcep.topology.spi.stats.TopologySessionStatsRegistry;
  27 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
  28 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  29 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  30 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  31 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  32 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  33 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  34 import org.opendaylight.mdsal.common.api.CommitInfo;
  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.rev171113.PcepTopologyNodeStatsAug;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.stats.rev171113.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 DataBroker dataBroker;
  53     private final int timeout;
  54     private BindingTransactionChain transactionChain;
  55     private ScheduledFuture<?> scheduleTask;
  56     private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
  57     private final AtomicBoolean closed = new AtomicBoolean(false);
  58
  59     public TopologyStatsProviderImpl(@Nonnull final DataBroker dataBroker, final int timeout) {
  60         this.dataBroker = requireNonNull(dataBroker);
  61         this.timeout = timeout;
  62     }
  63
  64     public synchronized void init() {
  65         LOG.info("Initializing TopologyStatsProvider service.", this);
  66         this.transactionChain = this.dataBroker.createTransactionChain(this);
  67         final TimerTask task = new TimerTask() {
  68             @Override
  69             public void run() {
  70                 updatePcepStats();
  71             }
  72         };
  73
  74         this.scheduleTask = this.scheduler.scheduleAtFixedRate(task, 0, this.timeout, SECONDS);
  75     }
  76
  77     @SuppressWarnings("checkstyle:IllegalCatch")
  78     private synchronized void updatePcepStats() {
  79         final WriteTransaction tx = TopologyStatsProviderImpl.this.transactionChain.newWriteOnlyTransaction();
  80
  81         try {
  82             for (final Map.Entry<KeyedInstanceIdentifier<Node, NodeKey>, PcepSessionState> entry
  83                     : this.statsMap.entrySet()) {
  84                 final PcepTopologyNodeStatsAug nodeStatsAug = new PcepTopologyNodeStatsAugBuilder()
  85                         .setPcepSessionState(new PcepSessionStateBuilder(entry.getValue()).build()).build();
  86                 final InstanceIdentifier<PcepTopologyNodeStatsAug> statId =
  87                         entry.getKey().augmentation(PcepTopologyNodeStatsAug.class);
  88                 tx.put(LogicalDatastoreType.OPERATIONAL, statId, nodeStatsAug);
  89             }
  90             tx.commit().addCallback(new FutureCallback<CommitInfo>() {
  91                 @Override
  92                 public void onSuccess(CommitInfo result) {
  93                     LOG.debug("Successfully committed Topology stats update");
  94                 }
  95
  96                 @Override
  97                 public void onFailure(Throwable ex) {
  98                     LOG.error("Failed to commit Topology stats update", ex);
  99                 }
 100             }, MoreExecutors.directExecutor());
 101         } catch (final Exception e) {
 102             LOG.warn("Failed to prepare Tx for BGP stats update", e);
 103             tx.cancel();
 104         }
 105     }
 106
 107     @Override
 108     public synchronized void close() throws Exception {
 109         if (closed.compareAndSet(false, true)) {
 110             LOG.info("Closing TopologyStatsProvider service.", this);
 111             this.scheduleTask.cancel(true);
 112             final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
 113             for (final KeyedInstanceIdentifier<Node, NodeKey> statId : this.statsMap.keySet()) {
 114                 wTx.delete(LogicalDatastoreType.OPERATIONAL, statId);
 115             }
 116             wTx.commit().get();
 117             this.statsMap.clear();
 118             this.transactionChain.close();
 119             this.scheduler.shutdown();
 120         }
 121     }
 122
 123     @Override
 124     public synchronized void onTransactionChainFailed(final TransactionChain<?, ?> chain,
 125             final AsyncTransaction<?, ?> transaction, final Throwable cause) {
 126         LOG.error("Transaction chain {} failed for tx {}",
 127                 chain, transaction != null ? transaction.getIdentifier() : null, cause);
 128
 129         if (!closed.get()) {
 130             transactionChain.close();
 131             transactionChain = dataBroker.createTransactionChain(this);
 132         }
 133     }
 134
 135     @Override
 136     public synchronized void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
 137         LOG.debug("Transaction chain {} successful.", chain);
 138     }
 139
 140     @Override
 141     public synchronized void bind(final KeyedInstanceIdentifier<Node, NodeKey> nodeId,
 142             final PcepSessionState sessionState) {
 143         this.statsMap.put(nodeId, sessionState);
 144     }
 145
 146     @Override
 147     public synchronized void unbind(final KeyedInstanceIdentifier<Node, NodeKey> nodeId) {
 148         this.statsMap.remove(nodeId);
 149         final WriteTransaction wTx = this.transactionChain.newWriteOnlyTransaction();
 150         wTx.delete(LogicalDatastoreType.OPERATIONAL, nodeId);
 151         try {
 152             wTx.commit().get();
 153         } catch (final InterruptedException | ExecutionException e) {
 154             LOG.warn("Failed to remove Pcep Node stats {}.", nodeId.getKey().getNodeId());
 155         }
 156     }
 157 }